diff --git a/board/NUCLEO_STM32G071RB/BSP/.mxproject b/board/NUCLEO_STM32G071RB/BSP/.mxproject
new file mode 100644
index 00000000..73f87f0a
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/.mxproject
@@ -0,0 +1,14 @@
+[PreviousGenFiles]
+HeaderPath=E:/Project/TencentOS-tiny/board/NUCLEO_STM32G071RB/BSP/Inc
+HeaderFiles=stm32g0xx_it.h;stm32g0xx_hal_conf.h;main.h;
+SourcePath=E:/Project/TencentOS-tiny/board/NUCLEO_STM32G071RB/BSP/Src
+SourceFiles=stm32g0xx_it.c;stm32g0xx_hal_msp.c;main.c;
+
+[PreviousLibFiles]
+LibFiles=Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_system.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_rcc.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash_ramfunc.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_cortex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_def.h;Drivers/STM32G0xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_exti.h;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_gpio.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim_ex.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart_ex.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc_ex.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_rcc.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash_ex.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma_ex.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr_ex.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c;Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_gpio_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_tim_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_system.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_uart_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_rcc_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_ll_rcc.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_flash_ramfunc.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_dma_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_pwr_ex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_cortex.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_def.h;Drivers/STM32G0xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h;Drivers/STM32G0xx_HAL_Driver/Inc/stm32g0xx_hal_exti.h;Drivers/CMSIS/Device/ST/STM32G0xx/Include/stm32g071xx.h;Drivers/CMSIS/Device/ST/STM32G0xx/Include/stm32g0xx.h;Drivers/CMSIS/Device/ST/STM32G0xx/Include/system_stm32g0xx.h;Drivers/CMSIS/Device/ST/STM32G0xx/Source/Templates/system_stm32g0xx.c;Drivers/CMSIS/Include/cmsis_armcc.h;Drivers/CMSIS/Include/cmsis_armclang.h;Drivers/CMSIS/Include/cmsis_compiler.h;Drivers/CMSIS/Include/cmsis_gcc.h;Drivers/CMSIS/Include/cmsis_iccarm.h;Drivers/CMSIS/Include/cmsis_version.h;Drivers/CMSIS/Include/core_armv8mbl.h;Drivers/CMSIS/Include/core_armv8mml.h;Drivers/CMSIS/Include/core_cm0.h;Drivers/CMSIS/Include/core_cm0plus.h;Drivers/CMSIS/Include/core_cm1.h;Drivers/CMSIS/Include/core_cm23.h;Drivers/CMSIS/Include/core_cm3.h;Drivers/CMSIS/Include/core_cm33.h;Drivers/CMSIS/Include/core_cm4.h;Drivers/CMSIS/Include/core_cm7.h;Drivers/CMSIS/Include/core_sc000.h;Drivers/CMSIS/Include/core_sc300.h;Drivers/CMSIS/Include/mpu_armv7.h;Drivers/CMSIS/Include/mpu_armv8.h;Drivers/CMSIS/Include/tz_context.h;
+
+[PreviousUsedKeilFiles]
+SourceFiles=..\Src\main.c;..\Src\stm32g0xx_it.c;..\Src\stm32g0xx_hal_msp.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_gpio.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_rcc.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c;..\\Src/system_stm32g0xx.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_gpio.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_tim_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_rcc.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr_ex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c;..\Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c;..\\Src/system_stm32g0xx.c;..\Drivers/CMSIS/Device/ST/STM32G0xx/Source/Templates/system_stm32g0xx.c;;
+HeaderPath=..\Drivers\STM32G0xx_HAL_Driver\Inc;..\Drivers\STM32G0xx_HAL_Driver\Inc\Legacy;..\Drivers\CMSIS\Device\ST\STM32G0xx\Include;..\Drivers\CMSIS\Include;..\Inc;
+CDefines=USE_HAL_DRIVER;STM32G071xx;USE_HAL_DRIVER;USE_HAL_DRIVER;
+
diff --git a/board/NUCLEO_STM32G071RB/BSP/Inc/gpio.h b/board/NUCLEO_STM32G071RB/BSP/Inc/gpio.h
new file mode 100644
index 00000000..40490539
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Inc/gpio.h
@@ -0,0 +1,57 @@
+/**
+ ******************************************************************************
+ * File Name : gpio.h
+ * Description : This file contains all the functions prototypes for
+ * the gpio
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2019 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __gpio_H
+#define __gpio_H
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "main.h"
+
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* USER CODE BEGIN Private defines */
+
+/* USER CODE END Private defines */
+
+void MX_GPIO_Init(void);
+
+/* USER CODE BEGIN Prototypes */
+
+/* USER CODE END Prototypes */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*__ pinoutConfig_H */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32G071RB/BSP/Inc/main.h b/board/NUCLEO_STM32G071RB/BSP/Inc/main.h
new file mode 100644
index 00000000..0c1b3136
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Inc/main.h
@@ -0,0 +1,78 @@
+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+ * @file : main.h
+ * @brief : Header for main.c file.
+ * This file contains the common defines of the application.
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2019 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+/* USER CODE END Header */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __MAIN_H
+#define __MAIN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32g0xx_hal.h"
+#include "stm32g0xx_ll_system.h"
+
+/* Private includes ----------------------------------------------------------*/
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* Exported types ------------------------------------------------------------*/
+/* USER CODE BEGIN ET */
+
+/* USER CODE END ET */
+
+/* Exported constants --------------------------------------------------------*/
+/* USER CODE BEGIN EC */
+
+/* USER CODE END EC */
+
+/* Exported macro ------------------------------------------------------------*/
+/* USER CODE BEGIN EM */
+
+/* USER CODE END EM */
+
+/* Exported functions prototypes ---------------------------------------------*/
+void Error_Handler(void);
+
+/* USER CODE BEGIN EFP */
+
+/* USER CODE END EFP */
+
+/* Private defines -----------------------------------------------------------*/
+#define MCO_Pin GPIO_PIN_0
+#define MCO_GPIO_Port GPIOF
+#define TMS_Pin GPIO_PIN_13
+#define TMS_GPIO_Port GPIOA
+#define TCK_Pin GPIO_PIN_14
+#define TCK_GPIO_Port GPIOA
+/* USER CODE BEGIN Private defines */
+
+/* USER CODE END Private defines */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __MAIN_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32G071RB/BSP/Inc/mcu_init.h b/board/NUCLEO_STM32G071RB/BSP/Inc/mcu_init.h
new file mode 100644
index 00000000..825f962d
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Inc/mcu_init.h
@@ -0,0 +1,19 @@
+#ifndef __MCU_INIT_H
+#define __MCU_INIT_H
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#include "main.h"
+#include "stm32g0xx_hal.h"
+#include "usart.h"
+#include "gpio.h"
+#include "tos.h"
+
+void board_init(void);
+void SystemClock_Config(void);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*__ __MCU_INIT_H */
diff --git a/board/NUCLEO_STM32G071RB/BSP/Inc/stm32g0xx_hal_conf.h b/board/NUCLEO_STM32G071RB/BSP/Inc/stm32g0xx_hal_conf.h
new file mode 100644
index 00000000..b8f115d6
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Inc/stm32g0xx_hal_conf.h
@@ -0,0 +1,310 @@
+/**
+ ******************************************************************************
+ * @file stm32g0xx_hal_conf.h
+ * @author MCD Application Team
+ * @brief HAL configuration file.
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2018 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef STM32G0xx_HAL_CONF_H
+#define STM32G0xx_HAL_CONF_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+
+/* ########################## Module Selection ############################## */
+/**
+ * @brief This is the list of modules to be used in the HAL driver
+ */
+#define HAL_MODULE_ENABLED
+
+ /* #define HAL_ADC_MODULE_ENABLED */
+/* #define HAL_CEC_MODULE_ENABLED */
+/* #define HAL_COMP_MODULE_ENABLED */
+/* #define HAL_CRC_MODULE_ENABLED */
+/* #define HAL_CRYP_MODULE_ENABLED */
+/* #define HAL_DAC_MODULE_ENABLED */
+/* #define HAL_EXTI_MODULE_ENABLED */
+/* #define HAL_I2C_MODULE_ENABLED */
+/* #define HAL_I2S_MODULE_ENABLED */
+/* #define HAL_IWDG_MODULE_ENABLED */
+/* #define HAL_IRDA_MODULE_ENABLED */
+/* #define HAL_LPTIM_MODULE_ENABLED */
+/* #define HAL_RNG_MODULE_ENABLED */
+/* #define HAL_RTC_MODULE_ENABLED */
+/* #define HAL_SMARTCARD_MODULE_ENABLED */
+/* #define HAL_SMBUS_MODULE_ENABLED */
+/* #define HAL_SPI_MODULE_ENABLED */
+/* #define HAL_TIM_MODULE_ENABLED */
+#define HAL_UART_MODULE_ENABLED
+/* #define HAL_USART_MODULE_ENABLED */
+/* #define HAL_WWDG_MODULE_ENABLED */
+#define HAL_GPIO_MODULE_ENABLED
+#define HAL_EXTI_MODULE_ENABLED
+#define HAL_DMA_MODULE_ENABLED
+#define HAL_RCC_MODULE_ENABLED
+#define HAL_FLASH_MODULE_ENABLED
+#define HAL_PWR_MODULE_ENABLED
+#define HAL_CORTEX_MODULE_ENABLED
+
+/* ########################## Register Callbacks selection ############################## */
+/**
+ * @brief This is the list of modules where register callback can be used
+ */
+#define USE_HAL_ADC_REGISTER_CALLBACKS 0u
+#define USE_HAL_CEC_REGISTER_CALLBACKS 0u
+#define USE_HAL_COMP_REGISTER_CALLBACKS 0u
+#define USE_HAL_CRYP_REGISTER_CALLBACKS 0u
+#define USE_HAL_DAC_REGISTER_CALLBACKS 0u
+#define USE_HAL_I2C_REGISTER_CALLBACKS 0u
+#define USE_HAL_I2S_REGISTER_CALLBACKS 0u
+#define USE_HAL_IRDA_REGISTER_CALLBACKS 0u
+#define USE_HAL_LPTIM_REGISTER_CALLBACKS 0u
+#define USE_HAL_RNG_REGISTER_CALLBACKS 0u
+#define USE_HAL_RTC_REGISTER_CALLBACKS 0u
+#define USE_HAL_SMBUS_REGISTER_CALLBACKS 0u
+#define USE_HAL_SPI_REGISTER_CALLBACKS 0u
+#define USE_HAL_TIM_REGISTER_CALLBACKS 0u
+#define USE_HAL_UART_REGISTER_CALLBACKS 0u
+#define USE_HAL_USART_REGISTER_CALLBACKS 0u
+#define USE_HAL_WWDG_REGISTER_CALLBACKS 0u
+
+/* ########################## Oscillator Values adaptation ####################*/
+/**
+ * @brief Adjust the value of External High Speed oscillator (HSE) used in your application.
+ * This value is used by the RCC HAL module to compute the system frequency
+ * (when HSE is used as system clock source, directly or through the PLL).
+ */
+#if !defined (HSE_VALUE)
+#define HSE_VALUE 8000000U /*!< Value of the External oscillator in Hz */
+#endif /* HSE_VALUE */
+
+#if !defined (HSE_STARTUP_TIMEOUT)
+#define HSE_STARTUP_TIMEOUT 100U /*!< Time out for HSE start up, in ms */
+#endif /* HSE_STARTUP_TIMEOUT */
+
+/**
+ * @brief Internal High Speed oscillator (HSI) value.
+ * This value is used by the RCC HAL module to compute the system frequency
+ * (when HSI is used as system clock source, directly or through the PLL).
+ */
+#if !defined (HSI_VALUE)
+#define HSI_VALUE 16000000U /*!< Value of the Internal oscillator in Hz*/
+#endif /* HSI_VALUE */
+
+/**
+ * @brief Internal Low Speed oscillator (LSI) value.
+ */
+#if !defined (LSI_VALUE)
+#define LSI_VALUE 32000U /*!< LSI Typical Value in Hz*/
+#endif /* LSI_VALUE */ /*!< Value of the Internal Low Speed oscillator in Hz
+The real value may vary depending on the variations
+in voltage and temperature.*/
+/**
+ * @brief External Low Speed oscillator (LSE) value.
+ * This value is used by the UART, RTC HAL module to compute the system frequency
+ */
+#if !defined (LSE_VALUE)
+#define LSE_VALUE 32768U /*!< Value of the External oscillator in Hz*/
+#endif /* LSE_VALUE */
+
+#if !defined (LSE_STARTUP_TIMEOUT)
+#define LSE_STARTUP_TIMEOUT 5000U /*!< Time out for LSE start up, in ms */
+#endif /* LSE_STARTUP_TIMEOUT */
+
+/**
+ * @brief External clock source for I2S1 peripheral
+ * This value is used by the RCC HAL module to compute the I2S1 clock source
+ * frequency.
+ */
+#if !defined (EXTERNAL_I2S1_CLOCK_VALUE)
+#define EXTERNAL_I2S1_CLOCK_VALUE 48000U /*!< Value of the I2S1 External clock source in Hz*/
+#endif /* EXTERNAL_I2S1_CLOCK_VALUE */
+
+/* Tip: To avoid modifying this file each time you need to use different HSE,
+ === you can define the HSE value in your toolchain compiler preprocessor. */
+
+/* ########################### System Configuration ######################### */
+/**
+ * @brief This is the HAL system configuration section
+ */
+#define VDD_VALUE 3300U /*!< Value of VDD in mv */
+#define TICK_INT_PRIORITY 0U /*!< tick interrupt priority */
+#define USE_RTOS 0U
+#define PREFETCH_ENABLE 1U
+#define INSTRUCTION_CACHE_ENABLE 1U
+
+/* ################## SPI peripheral configuration ########################## */
+
+/* CRC FEATURE: Use to activate CRC feature inside HAL SPI Driver
+* Activated: CRC code is present inside driver
+* Deactivated: CRC code cleaned from driver
+*/
+
+#define USE_SPI_CRC 0U
+
+/* ################## CRYP peripheral configuration ########################## */
+
+#define USE_HAL_CRYP_SUSPEND_RESUME 1U
+
+/* ########################## Assert Selection ############################## */
+/**
+ * @brief Uncomment the line below to expanse the "assert_param" macro in the
+ * HAL drivers code
+ */
+/* #define USE_FULL_ASSERT 1U */
+
+/* Includes ------------------------------------------------------------------*/
+/**
+ * @brief Include module's header file
+ */
+
+#ifdef HAL_RCC_MODULE_ENABLED
+#include "stm32g0xx_hal_rcc.h"
+#endif /* HAL_RCC_MODULE_ENABLED */
+
+#ifdef HAL_GPIO_MODULE_ENABLED
+#include "stm32g0xx_hal_gpio.h"
+#endif /* HAL_GPIO_MODULE_ENABLED */
+
+#ifdef HAL_DMA_MODULE_ENABLED
+#include "stm32g0xx_hal_dma.h"
+#endif /* HAL_DMA_MODULE_ENABLED */
+
+#ifdef HAL_CORTEX_MODULE_ENABLED
+#include "stm32g0xx_hal_cortex.h"
+#endif /* HAL_CORTEX_MODULE_ENABLED */
+
+#ifdef HAL_ADC_MODULE_ENABLED
+#include "stm32g0xx_hal_adc.h"
+#include "stm32g0xx_hal_adc_ex.h"
+#endif /* HAL_ADC_MODULE_ENABLED */
+
+#ifdef HAL_CEC_MODULE_ENABLED
+#include "stm32g0xx_hal_cec.h"
+#endif /* HAL_CEC_MODULE_ENABLED */
+
+#ifdef HAL_COMP_MODULE_ENABLED
+#include "stm32g0xx_hal_comp.h"
+#endif /* HAL_COMP_MODULE_ENABLED */
+
+#ifdef HAL_CRC_MODULE_ENABLED
+#include "stm32g0xx_hal_crc.h"
+#endif /* HAL_CRC_MODULE_ENABLED */
+
+#ifdef HAL_CRYP_MODULE_ENABLED
+#include "stm32g0xx_hal_cryp.h"
+#endif /* HAL_CRYP_MODULE_ENABLED */
+
+#ifdef HAL_DAC_MODULE_ENABLED
+#include "stm32g0xx_hal_dac.h"
+#endif /* HAL_DAC_MODULE_ENABLED */
+
+#ifdef HAL_EXTI_MODULE_ENABLED
+#include "stm32g0xx_hal_exti.h"
+#endif /* HAL_EXTI_MODULE_ENABLED */
+
+#ifdef HAL_FLASH_MODULE_ENABLED
+#include "stm32g0xx_hal_flash.h"
+#endif /* HAL_FLASH_MODULE_ENABLED */
+
+#ifdef HAL_I2C_MODULE_ENABLED
+#include "stm32g0xx_hal_i2c.h"
+#endif /* HAL_I2C_MODULE_ENABLED */
+
+#ifdef HAL_I2S_MODULE_ENABLED
+#include "stm32g0xx_hal_i2s.h"
+#endif /* HAL_I2S_MODULE_ENABLED */
+
+#ifdef HAL_IRDA_MODULE_ENABLED
+#include "stm32g0xx_hal_irda.h"
+#endif /* HAL_IRDA_MODULE_ENABLED */
+
+#ifdef HAL_IWDG_MODULE_ENABLED
+#include "stm32g0xx_hal_iwdg.h"
+#endif /* HAL_IWDG_MODULE_ENABLED */
+
+#ifdef HAL_LPTIM_MODULE_ENABLED
+#include "stm32g0xx_hal_lptim.h"
+#endif /* HAL_LPTIM_MODULE_ENABLED */
+
+#ifdef HAL_PWR_MODULE_ENABLED
+#include "stm32g0xx_hal_pwr.h"
+#endif /* HAL_PWR_MODULE_ENABLED */
+
+#ifdef HAL_RNG_MODULE_ENABLED
+#include "stm32g0xx_hal_rng.h"
+#endif /* HAL_RNG_MODULE_ENABLED */
+
+#ifdef HAL_RTC_MODULE_ENABLED
+#include "stm32g0xx_hal_rtc.h"
+#endif /* HAL_RTC_MODULE_ENABLED */
+
+#ifdef HAL_SMARTCARD_MODULE_ENABLED
+#include "stm32g0xx_hal_smartcard.h"
+#endif /* HAL_SMARTCARD_MODULE_ENABLED */
+
+#ifdef HAL_SMBUS_MODULE_ENABLED
+#include "stm32g0xx_hal_smbus.h"
+#endif /* HAL_SMBUS_MODULE_ENABLED */
+
+#ifdef HAL_SPI_MODULE_ENABLED
+#include "stm32g0xx_hal_spi.h"
+#endif /* HAL_SPI_MODULE_ENABLED */
+
+#ifdef HAL_TIM_MODULE_ENABLED
+#include "stm32g0xx_hal_tim.h"
+#endif /* HAL_TIM_MODULE_ENABLED */
+
+#ifdef HAL_UART_MODULE_ENABLED
+#include "stm32g0xx_hal_uart.h"
+#endif /* HAL_UART_MODULE_ENABLED */
+
+#ifdef HAL_USART_MODULE_ENABLED
+#include "stm32g0xx_hal_usart.h"
+#endif /* HAL_USART_MODULE_ENABLED */
+
+#ifdef HAL_WWDG_MODULE_ENABLED
+#include "stm32g0xx_hal_wwdg.h"
+#endif /* HAL_WWDG_MODULE_ENABLED */
+
+/* Exported macro ------------------------------------------------------------*/
+#ifdef USE_FULL_ASSERT
+/**
+ * @brief The assert_param macro is used for functions parameters check.
+ * @param expr If expr is false, it calls assert_failed function
+ * which reports the name of the source file and the source
+ * line number of the call that failed.
+ * If expr is true, it returns no value.
+ * @retval None
+ */
+#define assert_param(expr) ((expr) ? (void)0U : assert_failed((uint8_t *)__FILE__, __LINE__))
+/* Exported functions ------------------------------------------------------- */
+void assert_failed(uint8_t *file, uint32_t line);
+#else
+#define assert_param(expr) ((void)0U)
+#endif /* USE_FULL_ASSERT */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* STM32G0xx_HAL_CONF_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32G071RB/BSP/Inc/stm32g0xx_it.h b/board/NUCLEO_STM32G071RB/BSP/Inc/stm32g0xx_it.h
new file mode 100644
index 00000000..8a26fed6
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Inc/stm32g0xx_it.h
@@ -0,0 +1,65 @@
+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+ * @file stm32g0xx_it.h
+ * @brief This file contains the headers of the interrupt handlers.
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2019 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+/* USER CODE END Header */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32G0xx_IT_H
+#define __STM32G0xx_IT_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Private includes ----------------------------------------------------------*/
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* Exported types ------------------------------------------------------------*/
+/* USER CODE BEGIN ET */
+
+/* USER CODE END ET */
+
+/* Exported constants --------------------------------------------------------*/
+/* USER CODE BEGIN EC */
+
+/* USER CODE END EC */
+
+/* Exported macro ------------------------------------------------------------*/
+/* USER CODE BEGIN EM */
+
+/* USER CODE END EM */
+
+/* Exported functions prototypes ---------------------------------------------*/
+void NMI_Handler(void);
+void HardFault_Handler(void);
+void SVC_Handler(void);
+void PendSV_Handler(void);
+void SysTick_Handler(void);
+/* USER CODE BEGIN EFP */
+
+/* USER CODE END EFP */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STM32G0xx_IT_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32G071RB/BSP/Inc/usart.h b/board/NUCLEO_STM32G071RB/BSP/Inc/usart.h
new file mode 100644
index 00000000..6d0a9c58
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Inc/usart.h
@@ -0,0 +1,58 @@
+/**
+ ******************************************************************************
+ * File Name : USART.h
+ * Description : This file provides code for the configuration
+ * of the USART instances.
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2019 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __usart_H
+#define __usart_H
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "main.h"
+
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+extern UART_HandleTypeDef huart2;
+
+/* USER CODE BEGIN Private defines */
+
+/* USER CODE END Private defines */
+
+void MX_USART2_UART_Init(void);
+
+/* USER CODE BEGIN Prototypes */
+
+/* USER CODE END Prototypes */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*__ usart_H */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32G071RB/BSP/NUCLEO_STM32G071RB.ioc b/board/NUCLEO_STM32G071RB/BSP/NUCLEO_STM32G071RB.ioc
new file mode 100644
index 00000000..1f5307ea
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/NUCLEO_STM32G071RB.ioc
@@ -0,0 +1,138 @@
+#MicroXplorer Configuration settings - do not modify
+File.Version=6
+KeepUserPlacement=false
+Mcu.Family=STM32G0
+Mcu.IP0=NVIC
+Mcu.IP1=RCC
+Mcu.IP2=SYS
+Mcu.IP3=USART2
+Mcu.IPNb=4
+Mcu.Name=STM32G071R(6-8-B)Tx
+Mcu.Package=LQFP64
+Mcu.Pin0=PC13
+Mcu.Pin1=PC14-OSC32_IN (PC14)
+Mcu.Pin2=PC15-OSC32_OUT (PC15)
+Mcu.Pin3=PF0-OSC_IN (PF0)
+Mcu.Pin4=PA2
+Mcu.Pin5=PA3
+Mcu.Pin6=PA13
+Mcu.Pin7=PA14-BOOT0
+Mcu.Pin8=VP_SYS_VS_Systick
+Mcu.Pin9=VP_SYS_VS_DBSignals
+Mcu.PinsNb=10
+Mcu.ThirdPartyNb=0
+Mcu.UserConstants=
+Mcu.UserName=STM32G071RBTx
+MxCube.Version=5.4.0
+MxDb.Version=DB.5.0.40
+NVIC.ForceEnableDMAVector=true
+NVIC.HardFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false
+NVIC.NonMaskableInt_IRQn=true\:0\:0\:false\:false\:true\:false\:false
+NVIC.PendSV_IRQn=true\:0\:0\:false\:false\:true\:false\:false
+NVIC.SVC_IRQn=true\:0\:0\:false\:false\:true\:false\:false
+NVIC.SysTick_IRQn=true\:0\:0\:false\:false\:true\:false\:true
+PA13.GPIOParameters=GPIO_Label
+PA13.GPIO_Label=TMS
+PA13.Mode=Serial_Wire
+PA13.Signal=SYS_SWDIO
+PA14-BOOT0.GPIOParameters=GPIO_Label
+PA14-BOOT0.GPIO_Label=TCK
+PA14-BOOT0.Locked=true
+PA14-BOOT0.Mode=Serial_Wire
+PA14-BOOT0.Signal=SYS_SWCLK
+PA2.Locked=true
+PA2.Mode=Asynchronous
+PA2.Signal=USART2_TX
+PA3.Locked=true
+PA3.Mode=Asynchronous
+PA3.Signal=USART2_RX
+PC13.Locked=true
+PC13.Mode=SYS_WakeUp1
+PC13.Signal=SYS_WKUP2
+PC14-OSC32_IN\ (PC14).Locked=true
+PC14-OSC32_IN\ (PC14).Mode=LSE-External-Oscillator
+PC14-OSC32_IN\ (PC14).Signal=RCC_OSC32_IN
+PC15-OSC32_OUT\ (PC15).Locked=true
+PC15-OSC32_OUT\ (PC15).Mode=LSE-External-Oscillator
+PC15-OSC32_OUT\ (PC15).Signal=RCC_OSC32_OUT
+PCC.Checker=true
+PCC.Line=STM32G0x1
+PCC.MCU=STM32G071R(6-8-B)Tx
+PCC.PartNumber=STM32G071RBTx
+PCC.Seq0=0
+PCC.Series=STM32G0
+PCC.Temperature=25
+PCC.Vdd=3.0
+PF0-OSC_IN\ (PF0).GPIOParameters=GPIO_Label
+PF0-OSC_IN\ (PF0).GPIO_Label=MCO
+PF0-OSC_IN\ (PF0).Locked=true
+PF0-OSC_IN\ (PF0).Mode=HSE-External-Clock-Source
+PF0-OSC_IN\ (PF0).Signal=RCC_OSC_IN
+PinOutPanel.RotationAngle=0
+ProjectManager.AskForMigrate=true
+ProjectManager.BackupPrevious=false
+ProjectManager.CompilerOptimize=6
+ProjectManager.ComputerToolchain=false
+ProjectManager.CoupleFile=false
+ProjectManager.CustomerFirmwarePackage=
+ProjectManager.DefaultFWLocation=true
+ProjectManager.DeletePrevious=true
+ProjectManager.DeviceId=STM32G071RBTx
+ProjectManager.FirmwarePackage=STM32Cube FW_G0 V1.3.0
+ProjectManager.FreePins=false
+ProjectManager.HalAssertFull=false
+ProjectManager.HeapSize=0x200
+ProjectManager.KeepUserCode=true
+ProjectManager.LastFirmware=true
+ProjectManager.LibraryCopy=0
+ProjectManager.MainLocation=Src
+ProjectManager.NoMain=false
+ProjectManager.PreviousToolchain=
+ProjectManager.ProjectBuild=false
+ProjectManager.ProjectFileName=NUCLEO_STM32G071RB.ioc
+ProjectManager.ProjectName=NUCLEO_STM32G071RB
+ProjectManager.StackSize=0x400
+ProjectManager.TargetToolchain=MDK-ARM V5.27
+ProjectManager.ToolChainLocation=
+ProjectManager.UnderRoot=false
+ProjectManager.functionlistsort=1-SystemClock_Config-RCC-false-HAL-false,1-MX_GPIO_Init-GPIO-false-HAL-true,3-MX_USART2_UART_Init-USART2-false-HAL-true
+RCC.ADCFreq_Value=64000000
+RCC.AHBFreq_Value=64000000
+RCC.APBFreq_Value=64000000
+RCC.APBTimFreq_Value=64000000
+RCC.CECFreq_Value=32786.88524590164
+RCC.CortexFreq_Value=64000000
+RCC.EXTERNAL_CLOCK_VALUE=48000
+RCC.FCLKCortexFreq_Value=64000000
+RCC.FamilyName=M
+RCC.HCLKFreq_Value=64000000
+RCC.HSE_VALUE=8000000
+RCC.HSI_VALUE=16000000
+RCC.I2C1Freq_Value=64000000
+RCC.I2S1Freq_Value=64000000
+RCC.IPParameters=ADCFreq_Value,AHBFreq_Value,APBFreq_Value,APBTimFreq_Value,CECFreq_Value,CortexFreq_Value,EXTERNAL_CLOCK_VALUE,FCLKCortexFreq_Value,FamilyName,HCLKFreq_Value,HSE_VALUE,HSI_VALUE,I2C1Freq_Value,I2S1Freq_Value,LPTIM1Freq_Value,LPTIM2Freq_Value,LPUART1Freq_Value,LSCOPinFreq_Value,LSI_VALUE,MCO1PinFreq_Value,PLLPoutputFreq_Value,PLLQoutputFreq_Value,PLLRCLKFreq_Value,PWRFreq_Value,SYSCLKFreq_VALUE,SYSCLKSource,TIM15Freq_Value,TIM1Freq_Value,USART1Freq_Value,USART2Freq_Value,VCOInputFreq_Value,VCOOutputFreq_Value
+RCC.LPTIM1Freq_Value=64000000
+RCC.LPTIM2Freq_Value=64000000
+RCC.LPUART1Freq_Value=64000000
+RCC.LSCOPinFreq_Value=32000
+RCC.LSI_VALUE=32000
+RCC.MCO1PinFreq_Value=64000000
+RCC.PLLPoutputFreq_Value=64000000
+RCC.PLLQoutputFreq_Value=64000000
+RCC.PLLRCLKFreq_Value=64000000
+RCC.PWRFreq_Value=64000000
+RCC.SYSCLKFreq_VALUE=64000000
+RCC.SYSCLKSource=RCC_SYSCLKSOURCE_PLLCLK
+RCC.TIM15Freq_Value=64000000
+RCC.TIM1Freq_Value=64000000
+RCC.USART1Freq_Value=64000000
+RCC.USART2Freq_Value=64000000
+RCC.VCOInputFreq_Value=16000000
+RCC.VCOOutputFreq_Value=128000000
+USART2.IPParameters=VirtualMode-Asynchronous
+USART2.VirtualMode-Asynchronous=VM_ASYNC
+VP_SYS_VS_DBSignals.Mode=DisableDeadBatterySignals
+VP_SYS_VS_DBSignals.Signal=SYS_VS_DBSignals
+VP_SYS_VS_Systick.Mode=SysTick
+VP_SYS_VS_Systick.Signal=SYS_VS_Systick
+board=custom
diff --git a/board/NUCLEO_STM32G071RB/BSP/Src/gpio.c b/board/NUCLEO_STM32G071RB/BSP/Src/gpio.c
new file mode 100644
index 00000000..e7752b5f
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Src/gpio.c
@@ -0,0 +1,54 @@
+/**
+ ******************************************************************************
+ * File Name : gpio.c
+ * Description : This file provides code for the configuration
+ * of all used GPIO pins.
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2019 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "gpio.h"
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/*----------------------------------------------------------------------------*/
+/* Configure GPIO */
+/*----------------------------------------------------------------------------*/
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/** Configure pins as
+ * Analog
+ * Input
+ * Output
+ * EVENT_OUT
+ * EXTI
+*/
+void MX_GPIO_Init(void)
+{
+
+ /* GPIO Ports Clock Enable */
+ __HAL_RCC_GPIOC_CLK_ENABLE();
+ __HAL_RCC_GPIOF_CLK_ENABLE();
+ __HAL_RCC_GPIOA_CLK_ENABLE();
+
+}
+
+/* USER CODE BEGIN 2 */
+
+/* USER CODE END 2 */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32G071RB/BSP/Src/main.c b/board/NUCLEO_STM32G071RB/BSP/Src/main.c
new file mode 100644
index 00000000..8ea5e0d1
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Src/main.c
@@ -0,0 +1,269 @@
+/**
+ ******************************************************************************
+ * @file : main.c
+ * @brief : Main program body
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2019 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+/* USER CODE END Header */
+
+/* Includes ------------------------------------------------------------------*/
+#include "cmsis_os.h"
+#include "main.h"
+
+/* Private includes ----------------------------------------------------------*/
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* Private typedef -----------------------------------------------------------*/
+/* USER CODE BEGIN PTD */
+
+/* USER CODE END PTD */
+
+/* Private define ------------------------------------------------------------*/
+/* USER CODE BEGIN PD */
+/* USER CODE END PD */
+
+/* Private macro -------------------------------------------------------------*/
+/* USER CODE BEGIN PM */
+
+/* USER CODE END PM */
+
+/* Private variables ---------------------------------------------------------*/
+UART_HandleTypeDef huart2;
+
+/* USER CODE BEGIN PV */
+
+/* USER CODE END PV */
+
+/* Private function prototypes -----------------------------------------------*/
+void SystemClock_Config(void);
+static void MX_GPIO_Init(void);
+static void MX_USART2_UART_Init(void);
+/* USER CODE BEGIN PFP */
+
+/* USER CODE END PFP */
+
+/* Private user code ---------------------------------------------------------*/
+/* USER CODE BEGIN 0 */
+
+#define APPLICATION_TASK_STK_SIZE 1024
+extern void application_entry(void *arg);
+osThreadDef(application_entry, osPriorityNormal, 1, APPLICATION_TASK_STK_SIZE);
+
+__weak void application_entry(void *arg)
+{
+ while (1) {
+ printf("This is a demo task,please use your task entry!\r\n");
+ tos_task_delay(1000);
+ }
+}
+int fputc(int ch, FILE *f)
+{
+ if (ch == '\n') {
+ HAL_UART_Transmit(&huart2, (void *)"\r", 1,30000);
+ }
+ HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF);
+ return ch;
+}
+
+int _write(int fd, char *ptr, int len)
+{
+ (void)HAL_UART_Transmit(&huart2, (uint8_t *)ptr, len, 0xFFFF);
+ return len;
+}
+
+int fgetc(FILE *f)
+{
+ /* Place your implementation of fgetc here */
+ /* e.g. readwrite a character to the USART2 and Loop until the end of transmission */
+ uint8_t ch = 0;
+ //uint32_t recv_size;
+ HAL_UART_Receive(&huart2, &ch, 1,30000);
+ return ch;
+}
+
+void board_init(void)
+{
+ HAL_Init();
+ SystemClock_Config();
+ MX_GPIO_Init();
+ MX_USART2_UART_Init();
+}
+/* USER CODE END 0 */
+
+/**
+ * @brief The application entry point.
+ * @retval int
+ */
+int main(void)
+{
+
+ board_init();
+ printf("Welcome to TencentOS tiny\r\n");
+ osKernelInitialize();
+ osThreadCreate(osThread(application_entry), NULL);
+ osKernelStart();
+}
+
+/**
+ * @brief System Clock Configuration
+ * @retval None
+ */
+void SystemClock_Config(void)
+{
+ RCC_OscInitTypeDef RCC_OscInitStruct = {0};
+ RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
+ RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
+
+ /** Configure the main internal regulator output voltage
+ */
+ HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
+ /** Initializes the CPU, AHB and APB busses clocks
+ */
+ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
+ RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+ RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
+ RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
+ RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+ RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
+ RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
+ RCC_OscInitStruct.PLL.PLLN = 8;
+ RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
+ RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
+ RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
+ if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
+ {
+ Error_Handler();
+ }
+ /** Initializes the CPU, AHB and APB busses clocks
+ */
+ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
+ |RCC_CLOCKTYPE_PCLK1;
+ RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
+ RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+ RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
+
+ if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
+ {
+ Error_Handler();
+ }
+ /** Initializes the peripherals clocks
+ */
+ PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
+ PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
+ if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
+ {
+ Error_Handler();
+ }
+}
+
+/**
+ * @brief USART2 Initialization Function
+ * @param None
+ * @retval None
+ */
+static void MX_USART2_UART_Init(void)
+{
+
+ /* USER CODE BEGIN USART2_Init 0 */
+
+ /* USER CODE END USART2_Init 0 */
+
+ /* USER CODE BEGIN USART2_Init 1 */
+
+ /* USER CODE END USART2_Init 1 */
+ huart2.Instance = USART2;
+ huart2.Init.BaudRate = 115200;
+ huart2.Init.WordLength = UART_WORDLENGTH_8B;
+ huart2.Init.StopBits = UART_STOPBITS_1;
+ huart2.Init.Parity = UART_PARITY_NONE;
+ huart2.Init.Mode = UART_MODE_TX_RX;
+ huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+ huart2.Init.OverSampling = UART_OVERSAMPLING_16;
+ huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
+ huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
+ huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
+ if (HAL_UART_Init(&huart2) != HAL_OK)
+ {
+ Error_Handler();
+ }
+ if (HAL_UARTEx_SetTxFifoThreshold(&huart2, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
+ {
+ Error_Handler();
+ }
+ if (HAL_UARTEx_SetRxFifoThreshold(&huart2, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
+ {
+ Error_Handler();
+ }
+ if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
+ {
+ Error_Handler();
+ }
+ /* USER CODE BEGIN USART2_Init 2 */
+
+ /* USER CODE END USART2_Init 2 */
+
+}
+
+/**
+ * @brief GPIO Initialization Function
+ * @param None
+ * @retval None
+ */
+static void MX_GPIO_Init(void)
+{
+
+ /* GPIO Ports Clock Enable */
+ __HAL_RCC_GPIOC_CLK_ENABLE();
+ __HAL_RCC_GPIOF_CLK_ENABLE();
+ __HAL_RCC_GPIOA_CLK_ENABLE();
+
+}
+
+/* USER CODE BEGIN 4 */
+
+/* USER CODE END 4 */
+
+/**
+ * @brief This function is executed in case of error occurrence.
+ * @retval None
+ */
+void Error_Handler(void)
+{
+ /* USER CODE BEGIN Error_Handler_Debug */
+ /* User can add his own implementation to report the HAL error return state */
+
+ /* USER CODE END Error_Handler_Debug */
+}
+
+#ifdef USE_FULL_ASSERT
+/**
+ * @brief Reports the name of the source file and the source line number
+ * where the assert_param error has occurred.
+ * @param file: pointer to the source file name
+ * @param line: assert_param error line source number
+ * @retval None
+ */
+void assert_failed(uint8_t *file, uint32_t line)
+{
+ /* USER CODE BEGIN 6 */
+ /* User can add his own implementation to report the file name and line number,
+ tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+ /* USER CODE END 6 */
+}
+#endif /* USE_FULL_ASSERT */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+
diff --git a/board/NUCLEO_STM32G071RB/BSP/Src/mcu_init.c b/board/NUCLEO_STM32G071RB/BSP/Src/mcu_init.c
new file mode 100644
index 00000000..f0c5f2a6
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Src/mcu_init.c
@@ -0,0 +1,120 @@
+#include "mcu_init.h"
+
+int fputc(int ch, FILE *f)
+{
+ if (ch == '\n') {
+ HAL_UART_Transmit(&huart2, (void *)"\r", 1,30000);
+ }
+ HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF);
+ return ch;
+}
+
+int _write(int fd, char *ptr, int len)
+{
+ (void)HAL_UART_Transmit(&huart2, (uint8_t *)ptr, len, 0xFFFF);
+ return len;
+}
+
+int fgetc(FILE *f)
+{
+ /* Place your implementation of fgetc here */
+ /* e.g. readwrite a character to the USART2 and Loop until the end of transmission */
+ uint8_t ch = 0;
+ //uint32_t recv_size;
+ HAL_UART_Receive(&huart2, &ch, 1,30000);
+ return ch;
+}
+
+void board_init(void)
+{
+ HAL_Init();
+ SystemClock_Config();
+ MX_GPIO_Init();
+ MX_USART2_UART_Init();
+}
+
+/**
+ * @brief System Clock Configuration
+ * @retval None
+ */
+void SystemClock_Config(void)
+{
+ RCC_OscInitTypeDef RCC_OscInitStruct = {0};
+ RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
+ RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
+
+ /** Configure the main internal regulator output voltage
+ */
+ HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
+ /** Initializes the CPU, AHB and APB busses clocks
+ */
+ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
+ RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+ RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
+ RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
+ RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+ RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
+ RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
+ RCC_OscInitStruct.PLL.PLLN = 8;
+ RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
+ RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
+ if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
+ {
+ Error_Handler();
+ }
+ /** Initializes the CPU, AHB and APB busses clocks
+ */
+ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
+ |RCC_CLOCKTYPE_PCLK1;
+ RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
+ RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+ RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
+
+ if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
+ {
+ Error_Handler();
+ }
+ /** Initializes the peripherals clocks
+ */
+ PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
+ PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
+ if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
+ {
+ Error_Handler();
+ }
+}
+
+/* USER CODE BEGIN 4 */
+
+/* USER CODE END 4 */
+
+/**
+ * @brief This function is executed in case of error occurrence.
+ * @retval None
+ */
+void Error_Handler(void)
+{
+ /* USER CODE BEGIN Error_Handler_Debug */
+ /* User can add his own implementation to report the HAL error return state */
+
+ /* USER CODE END Error_Handler_Debug */
+}
+
+#ifdef USE_FULL_ASSERT
+/**
+ * @brief Reports the name of the source file and the source line number
+ * where the assert_param error has occurred.
+ * @param file: pointer to the source file name
+ * @param line: assert_param error line source number
+ * @retval None
+ */
+void assert_failed(uint8_t *file, uint32_t line)
+{
+ /* USER CODE BEGIN 6 */
+ /* User can add his own implementation to report the file name and line number,
+ tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+ /* USER CODE END 6 */
+}
+#endif /* USE_FULL_ASSERT */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32G071RB/BSP/Src/stm32g0xx_hal_msp.c b/board/NUCLEO_STM32G071RB/BSP/Src/stm32g0xx_hal_msp.c
new file mode 100644
index 00000000..e52700b1
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Src/stm32g0xx_hal_msp.c
@@ -0,0 +1,153 @@
+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+ * File Name : stm32g0xx_hal_msp.c
+ * Description : This file provides code for the MSP Initialization
+ * and de-Initialization codes.
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2019 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+/* USER CODE END Header */
+
+/* Includes ------------------------------------------------------------------*/
+#include "main.h"
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* Private typedef -----------------------------------------------------------*/
+/* USER CODE BEGIN TD */
+
+/* USER CODE END TD */
+
+/* Private define ------------------------------------------------------------*/
+/* USER CODE BEGIN Define */
+
+/* USER CODE END Define */
+
+/* Private macro -------------------------------------------------------------*/
+/* USER CODE BEGIN Macro */
+
+/* USER CODE END Macro */
+
+/* Private variables ---------------------------------------------------------*/
+/* USER CODE BEGIN PV */
+
+/* USER CODE END PV */
+
+/* Private function prototypes -----------------------------------------------*/
+/* USER CODE BEGIN PFP */
+
+/* USER CODE END PFP */
+
+/* External functions --------------------------------------------------------*/
+/* USER CODE BEGIN ExternalFunctions */
+
+/* USER CODE END ExternalFunctions */
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+/**
+ * Initializes the Global MSP.
+ */
+void HAL_MspInit(void)
+{
+ /* USER CODE BEGIN MspInit 0 */
+
+ /* USER CODE END MspInit 0 */
+
+ __HAL_RCC_SYSCFG_CLK_ENABLE();
+ __HAL_RCC_PWR_CLK_ENABLE();
+
+ /* System interrupt init*/
+
+ /** Disable the internal Pull-Up in Dead Battery pins of UCPD peripheral
+ */
+ LL_SYSCFG_DisableDBATT(LL_SYSCFG_UCPD1_STROBE | LL_SYSCFG_UCPD2_STROBE);
+
+ /* USER CODE BEGIN MspInit 1 */
+
+ /* USER CODE END MspInit 1 */
+}
+
+/**
+* @brief UART MSP Initialization
+* This function configures the hardware resources used in this example
+* @param huart: UART handle pointer
+* @retval None
+*/
+void HAL_UART_MspInit(UART_HandleTypeDef* huart)
+{
+ GPIO_InitTypeDef GPIO_InitStruct = {0};
+ if(huart->Instance==USART2)
+ {
+ /* USER CODE BEGIN USART2_MspInit 0 */
+
+ /* USER CODE END USART2_MspInit 0 */
+ /* Peripheral clock enable */
+ __HAL_RCC_USART2_CLK_ENABLE();
+
+ __HAL_RCC_GPIOA_CLK_ENABLE();
+ /**USART2 GPIO Configuration
+ PA2 ------> USART2_TX
+ PA3 ------> USART2_RX
+ */
+ GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
+ GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+ GPIO_InitStruct.Pull = GPIO_NOPULL;
+ GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
+ GPIO_InitStruct.Alternate = GPIO_AF1_USART2;
+ HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+ /* USER CODE BEGIN USART2_MspInit 1 */
+
+ /* USER CODE END USART2_MspInit 1 */
+ }
+
+}
+
+/**
+* @brief UART MSP De-Initialization
+* This function freeze the hardware resources used in this example
+* @param huart: UART handle pointer
+* @retval None
+*/
+void HAL_UART_MspDeInit(UART_HandleTypeDef* huart)
+{
+ if(huart->Instance==USART2)
+ {
+ /* USER CODE BEGIN USART2_MspDeInit 0 */
+
+ /* USER CODE END USART2_MspDeInit 0 */
+ /* Peripheral clock disable */
+ __HAL_RCC_USART2_CLK_DISABLE();
+
+ /**USART2 GPIO Configuration
+ PA2 ------> USART2_TX
+ PA3 ------> USART2_RX
+ */
+ HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2|GPIO_PIN_3);
+
+ /* USER CODE BEGIN USART2_MspDeInit 1 */
+
+ /* USER CODE END USART2_MspDeInit 1 */
+ }
+
+}
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32G071RB/BSP/Src/stm32g0xx_it.c b/board/NUCLEO_STM32G071RB/BSP/Src/stm32g0xx_it.c
new file mode 100644
index 00000000..a1f4ec95
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Src/stm32g0xx_it.c
@@ -0,0 +1,152 @@
+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+ * @file stm32g0xx_it.c
+ * @brief Interrupt Service Routines.
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2019 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+/* USER CODE END Header */
+
+/* Includes ------------------------------------------------------------------*/
+#include "main.h"
+#include "stm32g0xx_it.h"
+#include "tos.h"
+/* Private includes ----------------------------------------------------------*/
+/* USER CODE BEGIN Includes */
+/* USER CODE END Includes */
+
+/* Private typedef -----------------------------------------------------------*/
+/* USER CODE BEGIN TD */
+
+/* USER CODE END TD */
+
+/* Private define ------------------------------------------------------------*/
+/* USER CODE BEGIN PD */
+
+/* USER CODE END PD */
+
+/* Private macro -------------------------------------------------------------*/
+/* USER CODE BEGIN PM */
+
+/* USER CODE END PM */
+
+/* Private variables ---------------------------------------------------------*/
+/* USER CODE BEGIN PV */
+
+/* USER CODE END PV */
+
+/* Private function prototypes -----------------------------------------------*/
+/* USER CODE BEGIN PFP */
+
+/* USER CODE END PFP */
+
+/* Private user code ---------------------------------------------------------*/
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/* External variables --------------------------------------------------------*/
+
+/* USER CODE BEGIN EV */
+
+/* USER CODE END EV */
+
+/******************************************************************************/
+/* Cortex-M0+ Processor Interruption and Exception Handlers */
+/******************************************************************************/
+/**
+ * @brief This function handles Non maskable interrupt.
+ */
+void NMI_Handler(void)
+{
+ /* USER CODE BEGIN NonMaskableInt_IRQn 0 */
+
+ /* USER CODE END NonMaskableInt_IRQn 0 */
+ /* USER CODE BEGIN NonMaskableInt_IRQn 1 */
+
+ /* USER CODE END NonMaskableInt_IRQn 1 */
+}
+
+/**
+ * @brief This function handles Hard fault interrupt.
+ */
+void HardFault_Handler(void)
+{
+ /* USER CODE BEGIN HardFault_IRQn 0 */
+
+ /* USER CODE END HardFault_IRQn 0 */
+ while (1)
+ {
+ /* USER CODE BEGIN W1_HardFault_IRQn 0 */
+ /* USER CODE END W1_HardFault_IRQn 0 */
+ }
+}
+
+/**
+ * @brief This function handles System service call via SWI instruction.
+ */
+void SVC_Handler(void)
+{
+ /* USER CODE BEGIN SVC_IRQn 0 */
+
+ /* USER CODE END SVC_IRQn 0 */
+ /* USER CODE BEGIN SVC_IRQn 1 */
+
+ /* USER CODE END SVC_IRQn 1 */
+}
+
+/**
+ * @brief This function handles Pendable request for system service.
+ */
+__weak void PendSV_Handler(void)
+{
+ /* USER CODE BEGIN PendSV_IRQn 0 */
+
+ /* USER CODE END PendSV_IRQn 0 */
+ /* USER CODE BEGIN PendSV_IRQn 1 */
+
+ /* USER CODE END PendSV_IRQn 1 */
+}
+
+/**
+ * @brief This function handles System tick timer.
+ */
+void SysTick_Handler(void)
+{
+ /* USER CODE BEGIN SysTick_IRQn 0 */
+
+ /* USER CODE END SysTick_IRQn 0 */
+ HAL_IncTick();
+ if(tos_knl_is_running())
+ {
+ tos_knl_irq_enter();
+ tos_tick_handler();
+ tos_knl_irq_leave();
+ }
+ /* USER CODE BEGIN SysTick_IRQn 1 */
+
+ /* USER CODE END SysTick_IRQn 1 */
+}
+
+/******************************************************************************/
+/* STM32G0xx Peripheral Interrupt Handlers */
+/* Add here the Interrupt Handlers for the used peripherals. */
+/* For the available peripheral interrupt handler names, */
+/* please refer to the startup file (startup_stm32g0xx.s). */
+/******************************************************************************/
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32G071RB/BSP/Src/system_stm32g0xx.c b/board/NUCLEO_STM32G071RB/BSP/Src/system_stm32g0xx.c
new file mode 100644
index 00000000..233ab30a
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Src/system_stm32g0xx.c
@@ -0,0 +1,290 @@
+/**
+ ******************************************************************************
+ * @file system_stm32g0xx.c
+ * @author MCD Application Team
+ * @brief CMSIS Cortex-M0+ Device Peripheral Access Layer System Source File
+ *
+ * This file provides two functions and one global variable to be called from
+ * user application:
+ * - SystemInit(): This function is called at startup just after reset and
+ * before branch to main program. This call is made inside
+ * the "startup_stm32g0xx.s" file.
+ *
+ * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
+ * by the user application to setup the SysTick
+ * timer or configure other parameters.
+ *
+ * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
+ * be called whenever the core clock is changed
+ * during program execution.
+ *
+ * After each device reset the HSI (8 MHz then 16 MHz) is used as system clock source.
+ * Then SystemInit() function is called, in "startup_stm32g0xx.s" file, to
+ * configure the system clock before to branch to main program.
+ *
+ * This file configures the system clock as follows:
+ *=============================================================================
+ *-----------------------------------------------------------------------------
+ * System Clock source | HSI
+ *-----------------------------------------------------------------------------
+ * SYSCLK(Hz) | 16000000
+ *-----------------------------------------------------------------------------
+ * HCLK(Hz) | 16000000
+ *-----------------------------------------------------------------------------
+ * AHB Prescaler | 1
+ *-----------------------------------------------------------------------------
+ * APB Prescaler | 1
+ *-----------------------------------------------------------------------------
+ * HSI Division factor | 1
+ *-----------------------------------------------------------------------------
+ * PLL_M | 1
+ *-----------------------------------------------------------------------------
+ * PLL_N | 8
+ *-----------------------------------------------------------------------------
+ * PLL_P | 7
+ *-----------------------------------------------------------------------------
+ * PLL_Q | 2
+ *-----------------------------------------------------------------------------
+ * PLL_R | 2
+ *-----------------------------------------------------------------------------
+ * Require 48MHz for RNG | Disabled
+ *-----------------------------------------------------------------------------
+ *=============================================================================
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2018 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/** @addtogroup CMSIS
+ * @{
+ */
+
+/** @addtogroup stm32g0xx_system
+ * @{
+ */
+
+/** @addtogroup STM32G0xx_System_Private_Includes
+ * @{
+ */
+
+#include "stm32g0xx.h"
+
+#if !defined (HSE_VALUE)
+#define HSE_VALUE (8000000UL) /*!< Value of the External oscillator in Hz */
+#endif /* HSE_VALUE */
+
+#if !defined (HSI_VALUE)
+ #define HSI_VALUE (16000000UL) /*!< Value of the Internal oscillator in Hz*/
+#endif /* HSI_VALUE */
+
+#if !defined (LSI_VALUE)
+ #define LSI_VALUE (32000UL) /*!< Value of LSI in Hz*/
+#endif /* LSI_VALUE */
+
+#if !defined (LSE_VALUE)
+ #define LSE_VALUE (32768UL) /*!< Value of LSE in Hz*/
+#endif /* LSE_VALUE */
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32G0xx_System_Private_TypesDefinitions
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32G0xx_System_Private_Defines
+ * @{
+ */
+
+/************************* Miscellaneous Configuration ************************/
+/*!< Uncomment the following line if you need to relocate your vector Table in
+ Internal SRAM. */
+/* #define VECT_TAB_SRAM */
+#define VECT_TAB_OFFSET 0x0U /*!< Vector Table base offset field.
+ This value must be a multiple of 0x100. */
+/******************************************************************************/
+/**
+ * @}
+ */
+
+/** @addtogroup STM32G0xx_System_Private_Macros
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32G0xx_System_Private_Variables
+ * @{
+ */
+ /* The SystemCoreClock variable is updated in three ways:
+ 1) by calling CMSIS function SystemCoreClockUpdate()
+ 2) by calling HAL API function HAL_RCC_GetHCLKFreq()
+ 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
+ Note: If you use this function to configure the system clock; then there
+ is no need to call the 2 first functions listed above, since SystemCoreClock
+ variable is updated automatically.
+ */
+ uint32_t SystemCoreClock = 16000000UL;
+
+ const uint32_t AHBPrescTable[16UL] = {0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 1UL, 2UL, 3UL, 4UL, 6UL, 7UL, 8UL, 9UL};
+ const uint32_t APBPrescTable[8UL] = {0UL, 0UL, 0UL, 0UL, 1UL, 2UL, 3UL, 4UL};
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32G0xx_System_Private_FunctionPrototypes
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32G0xx_System_Private_Functions
+ * @{
+ */
+
+/**
+ * @brief Setup the microcontroller system.
+ * @param None
+ * @retval None
+ */
+void SystemInit(void)
+{
+ /* Configure the Vector Table location add offset address ------------------*/
+#ifdef VECT_TAB_SRAM
+ SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
+#else
+ SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
+#endif
+}
+
+/**
+ * @brief Update SystemCoreClock variable according to Clock Register Values.
+ * The SystemCoreClock variable contains the core clock (HCLK), it can
+ * be used by the user application to setup the SysTick timer or configure
+ * other parameters.
+ *
+ * @note Each time the core clock (HCLK) changes, this function must be called
+ * to update SystemCoreClock variable value. Otherwise, any configuration
+ * based on this variable will be incorrect.
+ *
+ * @note - The system frequency computed by this function is not the real
+ * frequency in the chip. It is calculated based on the predefined
+ * constant and the selected clock source:
+ *
+ * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(**) / HSI division factor
+ *
+ * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(***)
+ *
+ * - If SYSCLK source is LSI, SystemCoreClock will contain the LSI_VALUE
+ *
+ * - If SYSCLK source is LSE, SystemCoreClock will contain the LSE_VALUE
+ *
+ * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(***)
+ * or HSI_VALUE(*) multiplied/divided by the PLL factors.
+ *
+ * (**) HSI_VALUE is a constant defined in stm32g0xx_hal_conf.h file (default value
+ * 16 MHz) but the real value may vary depending on the variations
+ * in voltage and temperature.
+ *
+ * (***) HSE_VALUE is a constant defined in stm32g0xx_hal_conf.h file (default value
+ * 8 MHz), user has to ensure that HSE_VALUE is same as the real
+ * frequency of the crystal used. Otherwise, this function may
+ * have wrong result.
+ *
+ * - The result of this function could be not correct when using fractional
+ * value for HSE crystal.
+ *
+ * @param None
+ * @retval None
+ */
+void SystemCoreClockUpdate(void)
+{
+ uint32_t tmp;
+ uint32_t pllvco;
+ uint32_t pllr;
+ uint32_t pllsource;
+ uint32_t pllm;
+ uint32_t hsidiv;
+
+ /* Get SYSCLK source -------------------------------------------------------*/
+ switch (RCC->CFGR & RCC_CFGR_SWS)
+ {
+ case RCC_CFGR_SWS_HSE: /* HSE used as system clock */
+ SystemCoreClock = HSE_VALUE;
+ break;
+
+ case RCC_CFGR_SWS_LSI: /* LSI used as system clock */
+ SystemCoreClock = LSI_VALUE;
+ break;
+
+ case RCC_CFGR_SWS_LSE: /* LSE used as system clock */
+ SystemCoreClock = LSE_VALUE;
+ break;
+
+ case RCC_CFGR_SWS_PLL: /* PLL used as system clock */
+ /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN
+ SYSCLK = PLL_VCO / PLLR
+ */
+ pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC);
+ pllm = ((RCC->PLLCFGR & RCC_PLLCFGR_PLLM) >> RCC_PLLCFGR_PLLM_Pos) + 1UL;
+
+ if(pllsource == 0x03UL) /* HSE used as PLL clock source */
+ {
+ pllvco = (HSE_VALUE / pllm);
+ }
+ else /* HSI used as PLL clock source */
+ {
+ pllvco = (HSI_VALUE / pllm);
+ }
+ pllvco = pllvco * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> RCC_PLLCFGR_PLLN_Pos);
+ pllr = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLR) >> RCC_PLLCFGR_PLLR_Pos) + 1UL);
+
+ SystemCoreClock = pllvco/pllr;
+ break;
+
+ case RCC_CFGR_SWS_HSI: /* HSI used as system clock */
+ default: /* HSI used as system clock */
+ hsidiv = (1UL << ((READ_BIT(RCC->CR, RCC_CR_HSIDIV))>> RCC_CR_HSIDIV_Pos));
+ SystemCoreClock = (HSI_VALUE/hsidiv);
+ break;
+ }
+ /* Compute HCLK clock frequency --------------------------------------------*/
+ /* Get HCLK prescaler */
+ tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> RCC_CFGR_HPRE_Pos)];
+ /* HCLK clock frequency */
+ SystemCoreClock >>= tmp;
+}
+
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32G071RB/BSP/Src/usart.c b/board/NUCLEO_STM32G071RB/BSP/Src/usart.c
new file mode 100644
index 00000000..a530e542
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/BSP/Src/usart.c
@@ -0,0 +1,121 @@
+/**
+ ******************************************************************************
+ * File Name : USART.c
+ * Description : This file provides code for the configuration
+ * of the USART instances.
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2019 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "usart.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+UART_HandleTypeDef huart2;
+
+/* USART2 init function */
+
+void MX_USART2_UART_Init(void)
+{
+
+ huart2.Instance = USART2;
+ huart2.Init.BaudRate = 115200;
+ huart2.Init.WordLength = UART_WORDLENGTH_8B;
+ huart2.Init.StopBits = UART_STOPBITS_1;
+ huart2.Init.Parity = UART_PARITY_NONE;
+ huart2.Init.Mode = UART_MODE_TX_RX;
+ huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+ huart2.Init.OverSampling = UART_OVERSAMPLING_16;
+ huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
+ huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
+ huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
+ if (HAL_UART_Init(&huart2) != HAL_OK)
+ {
+ Error_Handler();
+ }
+ if (HAL_UARTEx_SetTxFifoThreshold(&huart2, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
+ {
+ Error_Handler();
+ }
+ if (HAL_UARTEx_SetRxFifoThreshold(&huart2, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
+ {
+ Error_Handler();
+ }
+ if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
+ {
+ Error_Handler();
+ }
+
+}
+
+void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
+{
+
+ GPIO_InitTypeDef GPIO_InitStruct = {0};
+ if(uartHandle->Instance==USART2)
+ {
+ /* USER CODE BEGIN USART2_MspInit 0 */
+
+ /* USER CODE END USART2_MspInit 0 */
+ /* USART2 clock enable */
+ __HAL_RCC_USART2_CLK_ENABLE();
+
+ __HAL_RCC_GPIOA_CLK_ENABLE();
+ /**USART2 GPIO Configuration
+ PA2 ------> USART2_TX
+ PA3 ------> USART2_RX
+ */
+ GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
+ GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+ GPIO_InitStruct.Pull = GPIO_NOPULL;
+ GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
+ GPIO_InitStruct.Alternate = GPIO_AF1_USART2;
+ HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+ /* USER CODE BEGIN USART2_MspInit 1 */
+
+ /* USER CODE END USART2_MspInit 1 */
+ }
+}
+
+void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
+{
+
+ if(uartHandle->Instance==USART2)
+ {
+ /* USER CODE BEGIN USART2_MspDeInit 0 */
+
+ /* USER CODE END USART2_MspDeInit 0 */
+ /* Peripheral clock disable */
+ __HAL_RCC_USART2_CLK_DISABLE();
+
+ /**USART2 GPIO Configuration
+ PA2 ------> USART2_TX
+ PA3 ------> USART2_RX
+ */
+ HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2|GPIO_PIN_3);
+
+ /* USER CODE BEGIN USART2_MspDeInit 1 */
+
+ /* USER CODE END USART2_MspDeInit 1 */
+ }
+}
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32G071RB/KEIL/hello_world/DebugConfig/NUCLEO_STM32G071RB_STM32G071RBTx_1.0.0.dbgconf b/board/NUCLEO_STM32G071RB/KEIL/hello_world/DebugConfig/NUCLEO_STM32G071RB_STM32G071RBTx_1.0.0.dbgconf
new file mode 100644
index 00000000..8e79f739
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/KEIL/hello_world/DebugConfig/NUCLEO_STM32G071RB_STM32G071RBTx_1.0.0.dbgconf
@@ -0,0 +1,39 @@
+// File: STM32G0x1.dbgconf
+// Version: 1.0.0
+// Note: refer to STM32G0x1 reference manual (RM0444)
+
+// <<< Use Configuration Wizard in Context Menu >>>
+
+// Debug MCU configuration register (DBGMCU_CR)
+// Reserved bits must be kept at reset value
+// DBG_STANDBY Debug Standby Mode
+// DBG_STOP Debug Stop Mode
+//
+DbgMCU_CR = 0x00000006;
+
+// Debug MCU APB freeze register 1 (DBGMCU_APB_FZ1)
+// Reserved bits must be kept at reset value
+// DBG_LPTIM1_STOP LPTIMER1 counter stopped when core is halted
+// DBG_LPTIM2_STOP LPTIMER2 counter stopped when core is halted
+// DBG_I2C1_SMBUS_TIMEOUT I2C1 SMBUS timeout is frozen
+// DBG_IWDG_STOP Debug independent watchdog stopped when core is halted
+// DBG_WWDG_STOP Debug window watchdog stopped when core is halted
+// DBG_RTC_STOP Debug RTC stopped when core is halted
+// DBG_TIM7_STOP TIM7 counter stopped when core is halted
+// DBG_TIM6_STOP TIM6 counter stopped when core is halted
+// DBG_TIM3_STOP TIM3 counter stopped when core is halted
+// DBG_TIM2_STOP TIM2 counter stopped when core is halted
+//
+DbgMCU_APB_Fz1 = 0x00000000;
+
+// Debug MCU APB freeze register 2 (DBGMCU_APB_FZ2)
+// Reserved bits must be kept at reset value
+// DBG_TIM17_STOP TIM17 counter stopped when core is halted
+// DBG_TIM16_STOP TIM16 counter stopped when core is halted
+// DBG_TIM15_STOP TIM15 counter stopped when core is halted
+// DBG_TIM14_STOP TIM14 counter stopped when core is halted
+// DBG_TIM1_STOP TIM1 counter stopped when core is halted
+//
+DbgMCU_APB_Fz2 = 0x00000000;
+
+// <<< end of configuration section >>>
diff --git a/board/NUCLEO_STM32G071RB/KEIL/hello_world/NUCLEO_STM32G071RB.uvoptx b/board/NUCLEO_STM32G071RB/KEIL/hello_world/NUCLEO_STM32G071RB.uvoptx
new file mode 100644
index 00000000..47e45c42
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/KEIL/hello_world/NUCLEO_STM32G071RB.uvoptx
@@ -0,0 +1,912 @@
+
+
+
+ 1.0
+
+ ### uVision Project, (C) Keil Software
+
+
+ *.c
+ *.s*; *.src; *.a*
+ *.obj; *.o
+ *.lib
+ *.txt; *.h; *.inc
+ *.plm
+ *.cpp
+ 0
+
+
+
+ 0
+ 0
+
+
+
+ NUCLEO_STM32G071RB
+ 0x4
+ ARM-ADS
+
+ 64000000
+
+ 1
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+ 1
+ 0
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+ 1
+ 0
+ 0
+ 6
+
+
+
+
+
+
+
+
+
+
+ STLink\ST-LINKIII-KEIL_SWO.dll
+
+
+
+ 0
+ ARMRTXEVENTFLAGS
+ -L70 -Z18 -C0 -M0 -T1
+
+
+ 0
+ DLGTARM
+ (1010=-1,-1,-1,-1,0)(1007=-1,-1,-1,-1,0)(1008=-1,-1,-1,-1,0)(1009=-1,-1,-1,-1,0)
+
+
+ 0
+ ARMDBGFLAGS
+
+
+
+ 0
+ DLGUARM
+ (105=-1,-1,-1,-1,0)
+
+
+ 0
+ UL2CM3
+ UL2CM3(-S0 -C0 -P0 -FD20000000 -FC1000 -FN1 -FF0STM32G0xx_128 -FS08000000 -FL020000 -FP0($$Device:STM32G071RBTx$CMSIS\Flash\STM32G0xx_128.FLM))
+
+
+ 0
+ ST-LINKIII-KEIL_SWO
+ -U-O142 -O2254 -SF10000 -C0 -A0 -I0 -HNlocalhost -HP7184 -P1 -N00("ARM CoreSight SW-DP (ARM Core") -D00(0BC11477) -L00(0) -TO18 -TC10000000 -TP21 -TDS8007 -TDT0 -TDC1F -TIEFFFFFFFF -TIP8 -FO7 -FD20000000 -FC1000 -FN1 -FF0STM32G0xx_128.FLM -FS08000000 -FL020000 -FP0($$Device:STM32G071RBTx$CMSIS\Flash\STM32G0xx_128.FLM)
+
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+
+
+
+ Application/MDK-ARM
+ 0
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+ startup_stm32g071xx.s
+ startup_stm32g071xx.s
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+
+
+
+
+ Application/User
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+
diff --git a/board/NUCLEO_STM32G071RB/KEIL/hello_world/NUCLEO_STM32G071RB.uvprojx b/board/NUCLEO_STM32G071RB/KEIL/hello_world/NUCLEO_STM32G071RB.uvprojx
new file mode 100644
index 00000000..6803d759
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/KEIL/hello_world/NUCLEO_STM32G071RB.uvprojx
@@ -0,0 +1,707 @@
+
+
+
+ 2.1
+
+ ### uVision Project, (C) Keil Software
+
+
+
+ NUCLEO_STM32G071RB
+ 0x4
+ ARM-ADS
+ 5060750::V5.06 update 6 (build 750)::ARMCC
+ 0
+
+
+ STM32G071RBTx
+ STMicroelectronics
+ Keil.STM32G0xx_DFP.1.2.0
+ https://www.keil.com/pack/
+ IRAM(0x20000000-0x20008FFF) IROM(0x8000000-0x801FFFF) CLOCK(8000000) CPUTYPE("Cortex-M0+")
+
+
+
+
+
+
+
+
+
+
+
+
+
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+ $$Device:STM32G071RBTx$CMSIS\SVD\STM32G071.svd
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+
+ SARMCM3.DLL
+ -REMAP
+ DARMCM1.DLL
+ -pCM0+
+ SARMCM3.DLL
+
+ TARMCM1.DLL
+ -pCM0+
+
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+
+
+ USE_HAL_DRIVER,STM32G071xx
+
+ ..\..\BSP\Inc;..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Inc;..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Inc\Legacy;..\..\..\..\platform\vendor_bsp\st\CMSIS\Device\ST\STM32G0xx\Include;..\..\..\..\platform\vendor_bsp\st\CMSIS\Include;..\..\..\..\arch\arm\arm-v7m\common\include;..\..\..\..\arch\arm\arm-v7m\cortex-m0+\armcc;..\..\..\..\kernel\core\include;..\..\..\..\kernel\pm\include;..\..\..\..\osal\cmsis_os;..\..\TOS_CONFIG
+
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+ 0x08000000
+ 0x20000000
+
+
+
+
+
+
+
+
+
+
+
+
+ Application/MDK-ARM
+
+
+ startup_stm32g071xx.s
+ 2
+ startup_stm32g071xx.s
+
+
+
+
+ Application/User
+
+
+ main.c
+ 1
+ ..\..\BSP\Src\main.c
+
+
+ stm32g0xx_hal_msp.c
+ 1
+ ..\..\BSP\Src\stm32g0xx_hal_msp.c
+
+
+ stm32g0xx_it.c
+ 1
+ ..\..\BSP\Src\stm32g0xx_it.c
+
+
+
+
+ Drivers/STM32G0xx_HAL_Driver
+
+
+ stm32g0xx_hal_gpio.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_gpio.c
+
+
+ stm32g0xx_hal_rng.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_rng.c
+
+
+ stm32g0xx_hal_tim.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_tim.c
+
+
+ stm32g0xx_ll_utils.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_ll_utils.c
+
+
+ stm32g0xx_hal.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal.c
+
+
+ stm32g0xx_hal_cortex.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_cortex.c
+
+
+ stm32g0xx_hal_dma.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_dma.c
+
+
+ stm32g0xx_hal_dma_ex.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_dma_ex.c
+
+
+ stm32g0xx_hal_exti.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_exti.c
+
+
+ stm32g0xx_hal_flash.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_flash.c
+
+
+ stm32g0xx_hal_flash_ex.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_flash_ex.c
+
+
+ stm32g0xx_hal_pwr.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_pwr.c
+
+
+ stm32g0xx_hal_pwr_ex.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_pwr_ex.c
+
+
+ stm32g0xx_hal_tim_ex.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_tim_ex.c
+
+
+ stm32g0xx_hal_uart.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_uart.c
+
+
+ stm32g0xx_hal_uart_ex.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_uart_ex.c
+
+
+ stm32g0xx_ll_rcc.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_ll_rcc.c
+
+
+ stm32g0xx_hal_rcc.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_rcc.c
+
+
+ stm32g0xx_hal_rcc_ex.c
+ 1
+ ..\..\..\..\platform\vendor_bsp\st\STM32G0xx_HAL_Driver\Src\stm32g0xx_hal_rcc_ex.c
+
+
+
+
+ Drivers/CMSIS
+
+
+ system_stm32g0xx.c
+ 1
+ ..\..\BSP\Src\system_stm32g0xx.c
+
+
+
+
+ tos/arch
+
+
+ tos_cpu.c
+ 1
+ ..\..\..\..\arch\arm\arm-v7m\common\tos_cpu.c
+
+
+ port_c.c
+ 1
+ ..\..\..\..\arch\arm\arm-v7m\cortex-m0+\armcc\port_c.c
+
+
+ port_s.S
+ 2
+ ..\..\..\..\arch\arm\arm-v7m\cortex-m0+\armcc\port_s.S
+
+
+
+
+ tos/kernel
+
+
+ tos_binary_heap.c
+ 1
+ ..\..\..\..\kernel\core\tos_binary_heap.c
+
+
+ tos_char_fifo.c
+ 1
+ ..\..\..\..\kernel\core\tos_char_fifo.c
+
+
+ tos_completion.c
+ 1
+ ..\..\..\..\kernel\core\tos_completion.c
+
+
+ tos_countdownlatch.c
+ 1
+ ..\..\..\..\kernel\core\tos_countdownlatch.c
+
+
+ tos_event.c
+ 1
+ ..\..\..\..\kernel\core\tos_event.c
+
+
+ tos_global.c
+ 1
+ ..\..\..\..\kernel\core\tos_global.c
+
+
+ tos_mail_queue.c
+ 1
+ ..\..\..\..\kernel\core\tos_mail_queue.c
+
+
+ tos_message_queue.c
+ 1
+ ..\..\..\..\kernel\core\tos_message_queue.c
+
+
+ tos_mmblk.c
+ 1
+ ..\..\..\..\kernel\core\tos_mmblk.c
+
+
+ tos_mmheap.c
+ 1
+ ..\..\..\..\kernel\core\tos_mmheap.c
+
+
+ tos_mutex.c
+ 1
+ ..\..\..\..\kernel\core\tos_mutex.c
+
+
+ tos_pend.c
+ 1
+ ..\..\..\..\kernel\core\tos_pend.c
+
+
+ tos_priority_mail_queue.c
+ 1
+ ..\..\..\..\kernel\core\tos_priority_mail_queue.c
+
+
+ tos_priority_message_queue.c
+ 1
+ ..\..\..\..\kernel\core\tos_priority_message_queue.c
+
+
+ tos_priority_queue.c
+ 1
+ ..\..\..\..\kernel\core\tos_priority_queue.c
+
+
+ tos_ring_queue.c
+ 1
+ ..\..\..\..\kernel\core\tos_ring_queue.c
+
+
+ tos_robin.c
+ 1
+ ..\..\..\..\kernel\core\tos_robin.c
+
+
+ tos_sched.c
+ 1
+ ..\..\..\..\kernel\core\tos_sched.c
+
+
+ tos_sem.c
+ 1
+ ..\..\..\..\kernel\core\tos_sem.c
+
+
+ tos_sys.c
+ 1
+ ..\..\..\..\kernel\core\tos_sys.c
+
+
+ tos_task.c
+ 1
+ ..\..\..\..\kernel\core\tos_task.c
+
+
+ tos_tick.c
+ 1
+ ..\..\..\..\kernel\core\tos_tick.c
+
+
+ tos_time.c
+ 1
+ ..\..\..\..\kernel\core\tos_time.c
+
+
+ tos_timer.c
+ 1
+ ..\..\..\..\kernel\core\tos_timer.c
+
+
+
+
+ tos/cmsis
+
+
+ cmsis_os.c
+ 1
+ ..\..\..\..\osal\cmsis_os\cmsis_os.c
+
+
+
+
+ examples
+
+
+ hello_world.c
+ 1
+ ..\..\..\..\examples\hello_world\hello_world.c
+
+
+
+
+ ::CMSIS
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/board/NUCLEO_STM32G071RB/KEIL/hello_world/NUCLEO_STM32G071RB/NUCLEO_STM32G071RB.sct b/board/NUCLEO_STM32G071RB/KEIL/hello_world/NUCLEO_STM32G071RB/NUCLEO_STM32G071RB.sct
new file mode 100644
index 00000000..01a848e6
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/KEIL/hello_world/NUCLEO_STM32G071RB/NUCLEO_STM32G071RB.sct
@@ -0,0 +1,16 @@
+; *************************************************************
+; *** Scatter-Loading Description File generated by uVision ***
+; *************************************************************
+
+LR_IROM1 0x08000000 0x00020000 { ; load region size_region
+ ER_IROM1 0x08000000 0x00020000 { ; load address = execution address
+ *.o (RESET, +First)
+ *(InRoot$$Sections)
+ .ANY (+RO)
+ .ANY (+XO)
+ }
+ RW_IRAM1 0x20000000 0x00009000 { ; RW data
+ .ANY (+RW +ZI)
+ }
+}
+
diff --git a/board/NUCLEO_STM32G071RB/KEIL/hello_world/RTE/_NUCLEO_STM32G071RB/RTE_Components.h b/board/NUCLEO_STM32G071RB/KEIL/hello_world/RTE/_NUCLEO_STM32G071RB/RTE_Components.h
new file mode 100644
index 00000000..c3cd1299
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/KEIL/hello_world/RTE/_NUCLEO_STM32G071RB/RTE_Components.h
@@ -0,0 +1,21 @@
+
+/*
+ * Auto generated Run-Time-Environment Configuration File
+ * *** Do not modify ! ***
+ *
+ * Project: 'NUCLEO_STM32G071RB'
+ * Target: 'NUCLEO_STM32G071RB'
+ */
+
+#ifndef RTE_COMPONENTS_H
+#define RTE_COMPONENTS_H
+
+
+/*
+ * Define the Device Header File:
+ */
+#define CMSIS_device_header "stm32g0xx.h"
+
+
+
+#endif /* RTE_COMPONENTS_H */
diff --git a/board/NUCLEO_STM32G071RB/KEIL/hello_world/startup_stm32g071xx.s b/board/NUCLEO_STM32G071RB/KEIL/hello_world/startup_stm32g071xx.s
new file mode 100644
index 00000000..df07eb08
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/KEIL/hello_world/startup_stm32g071xx.s
@@ -0,0 +1,252 @@
+;******************************************************************************
+;* File Name : startup_stm32g071xx.s
+;* Author : MCD Application Team
+;* Description : STM32G071xx devices vector table for MDK-ARM toolchain.
+;* This module performs:
+;* - Set the initial SP
+;* - Set the initial PC == Reset_Handler
+;* - Set the vector table entries with the exceptions ISR address
+;* - Branches to __main in the C library (which eventually
+;* calls main()).
+;* After Reset the CortexM0 processor is in Thread mode,
+;* priority is Privileged, and the Stack is set to Main.
+;* <<< Use Configuration Wizard in Context Menu >>>
+;******************************************************************************
+;* @attention
+;*
+;* Copyright (c) 2018 STMicroelectronics. All rights reserved.
+;*
+;* This software component is licensed by ST under BSD 3-Clause license,
+;* the "License"; You may not use this file except in compliance with the
+;* License. You may obtain a copy of the License at:
+;* opensource.org/licenses/BSD-3-Clause
+;*
+;******************************************************************************
+
+; Amount of memory (in bytes) allocated for Stack
+; Tailor this value to your application needs
+; Stack Configuration
+; Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
+;
+
+Stack_Size EQU 0x400
+
+ AREA STACK, NOINIT, READWRITE, ALIGN=3
+Stack_Mem SPACE Stack_Size
+__initial_sp
+
+
+; Heap Configuration
+; Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
+;
+
+Heap_Size EQU 0x200
+
+ AREA HEAP, NOINIT, READWRITE, ALIGN=3
+__heap_base
+Heap_Mem SPACE Heap_Size
+__heap_limit
+
+ PRESERVE8
+ THUMB
+
+
+; Vector Table Mapped to Address 0 at Reset
+ AREA RESET, DATA, READONLY
+ EXPORT __Vectors
+ EXPORT __Vectors_End
+ EXPORT __Vectors_Size
+
+__Vectors DCD __initial_sp ; Top of Stack
+ DCD Reset_Handler ; Reset Handler
+ DCD NMI_Handler ; NMI Handler
+ DCD HardFault_Handler ; Hard Fault Handler
+ DCD 0 ; Reserved
+ DCD 0 ; Reserved
+ DCD 0 ; Reserved
+ DCD 0 ; Reserved
+ DCD 0 ; Reserved
+ DCD 0 ; Reserved
+ DCD 0 ; Reserved
+ DCD SVC_Handler ; SVCall Handler
+ DCD 0 ; Reserved
+ DCD 0 ; Reserved
+ DCD PendSV_Handler ; PendSV Handler
+ DCD SysTick_Handler ; SysTick Handler
+
+ ; External Interrupts
+ DCD WWDG_IRQHandler ; Window Watchdog
+ DCD PVD_IRQHandler ; PVD through EXTI Line detect
+ DCD RTC_TAMP_IRQHandler ; RTC through EXTI Line
+ DCD FLASH_IRQHandler ; FLASH
+ DCD RCC_IRQHandler ; RCC
+ DCD EXTI0_1_IRQHandler ; EXTI Line 0 and 1
+ DCD EXTI2_3_IRQHandler ; EXTI Line 2 and 3
+ DCD EXTI4_15_IRQHandler ; EXTI Line 4 to 15
+ DCD UCPD1_2_IRQHandler ; UCPD1, UCPD2
+ DCD DMA1_Channel1_IRQHandler ; DMA1 Channel 1
+ DCD DMA1_Channel2_3_IRQHandler ; DMA1 Channel 2 and Channel 3
+ DCD DMA1_Ch4_7_DMAMUX1_OVR_IRQHandler ; DMA1 Channel 4 to Channel 7, DMAMUX1 overrun
+ DCD ADC1_COMP_IRQHandler ; ADC1, COMP1 and COMP2
+ DCD TIM1_BRK_UP_TRG_COM_IRQHandler ; TIM1 Break, Update, Trigger and Commutation
+ DCD TIM1_CC_IRQHandler ; TIM1 Capture Compare
+ DCD TIM2_IRQHandler ; TIM2
+ DCD TIM3_IRQHandler ; TIM3
+ DCD TIM6_DAC_LPTIM1_IRQHandler ; TIM6, DAC & LPTIM1
+ DCD TIM7_LPTIM2_IRQHandler ; TIM7 & LPTIM2
+ DCD TIM14_IRQHandler ; TIM14
+ DCD TIM15_IRQHandler ; TIM15
+ DCD TIM16_IRQHandler ; TIM16
+ DCD TIM17_IRQHandler ; TIM17
+ DCD I2C1_IRQHandler ; I2C1
+ DCD I2C2_IRQHandler ; I2C2
+ DCD SPI1_IRQHandler ; SPI1
+ DCD SPI2_IRQHandler ; SPI2
+ DCD USART1_IRQHandler ; USART1
+ DCD USART2_IRQHandler ; USART2
+ DCD USART3_4_LPUART1_IRQHandler ; USART3, USART4, LPUART1
+ DCD CEC_IRQHandler ; CEC
+
+__Vectors_End
+
+__Vectors_Size EQU __Vectors_End - __Vectors
+
+ AREA |.text|, CODE, READONLY
+
+; Reset handler routine
+Reset_Handler PROC
+ EXPORT Reset_Handler [WEAK]
+ IMPORT __main
+ IMPORT SystemInit
+ LDR R0, =SystemInit
+ BLX R0
+ LDR R0, =__main
+ BX R0
+ ENDP
+
+; Dummy Exception Handlers (infinite loops which can be modified)
+
+NMI_Handler PROC
+ EXPORT NMI_Handler [WEAK]
+ B .
+ ENDP
+HardFault_Handler\
+ PROC
+ EXPORT HardFault_Handler [WEAK]
+ B .
+ ENDP
+SVC_Handler PROC
+ EXPORT SVC_Handler [WEAK]
+ B .
+ ENDP
+PendSV_Handler PROC
+ EXPORT PendSV_Handler [WEAK]
+ B .
+ ENDP
+SysTick_Handler PROC
+ EXPORT SysTick_Handler [WEAK]
+ B .
+ ENDP
+
+Default_Handler PROC
+
+ EXPORT WWDG_IRQHandler [WEAK]
+ EXPORT PVD_IRQHandler [WEAK]
+ EXPORT RTC_TAMP_IRQHandler [WEAK]
+ EXPORT FLASH_IRQHandler [WEAK]
+ EXPORT RCC_IRQHandler [WEAK]
+ EXPORT EXTI0_1_IRQHandler [WEAK]
+ EXPORT EXTI2_3_IRQHandler [WEAK]
+ EXPORT EXTI4_15_IRQHandler [WEAK]
+ EXPORT UCPD1_2_IRQHandler [WEAK]
+ EXPORT DMA1_Channel1_IRQHandler [WEAK]
+ EXPORT DMA1_Channel2_3_IRQHandler [WEAK]
+ EXPORT DMA1_Ch4_7_DMAMUX1_OVR_IRQHandler [WEAK]
+ EXPORT ADC1_COMP_IRQHandler [WEAK]
+ EXPORT TIM1_BRK_UP_TRG_COM_IRQHandler [WEAK]
+ EXPORT TIM1_CC_IRQHandler [WEAK]
+ EXPORT TIM2_IRQHandler [WEAK]
+ EXPORT TIM3_IRQHandler [WEAK]
+ EXPORT TIM6_DAC_LPTIM1_IRQHandler [WEAK]
+ EXPORT TIM7_LPTIM2_IRQHandler [WEAK]
+ EXPORT TIM14_IRQHandler [WEAK]
+ EXPORT TIM15_IRQHandler [WEAK]
+ EXPORT TIM16_IRQHandler [WEAK]
+ EXPORT TIM17_IRQHandler [WEAK]
+ EXPORT I2C1_IRQHandler [WEAK]
+ EXPORT I2C2_IRQHandler [WEAK]
+ EXPORT SPI1_IRQHandler [WEAK]
+ EXPORT SPI2_IRQHandler [WEAK]
+ EXPORT USART1_IRQHandler [WEAK]
+ EXPORT USART2_IRQHandler [WEAK]
+ EXPORT USART3_4_LPUART1_IRQHandler [WEAK]
+ EXPORT CEC_IRQHandler [WEAK]
+
+
+WWDG_IRQHandler
+PVD_IRQHandler
+RTC_TAMP_IRQHandler
+FLASH_IRQHandler
+RCC_IRQHandler
+EXTI0_1_IRQHandler
+EXTI2_3_IRQHandler
+EXTI4_15_IRQHandler
+UCPD1_2_IRQHandler
+DMA1_Channel1_IRQHandler
+DMA1_Channel2_3_IRQHandler
+DMA1_Ch4_7_DMAMUX1_OVR_IRQHandler
+ADC1_COMP_IRQHandler
+TIM1_BRK_UP_TRG_COM_IRQHandler
+TIM1_CC_IRQHandler
+TIM2_IRQHandler
+TIM3_IRQHandler
+TIM6_DAC_LPTIM1_IRQHandler
+TIM7_LPTIM2_IRQHandler
+TIM14_IRQHandler
+TIM15_IRQHandler
+TIM16_IRQHandler
+TIM17_IRQHandler
+I2C1_IRQHandler
+I2C2_IRQHandler
+SPI1_IRQHandler
+SPI2_IRQHandler
+USART1_IRQHandler
+USART2_IRQHandler
+USART3_4_LPUART1_IRQHandler
+CEC_IRQHandler
+
+ B .
+
+ ENDP
+
+ ALIGN
+
+;*******************************************************************************
+; User Stack and Heap initialization
+;*******************************************************************************
+ IF :DEF:__MICROLIB
+
+ EXPORT __initial_sp
+ EXPORT __heap_base
+ EXPORT __heap_limit
+
+ ELSE
+
+ IMPORT __use_two_region_memory
+ EXPORT __user_initial_stackheap
+
+__user_initial_stackheap
+
+ LDR R0, = Heap_Mem
+ LDR R1, =(Stack_Mem + Stack_Size)
+ LDR R2, = (Heap_Mem + Heap_Size)
+ LDR R3, = Stack_Mem
+ BX LR
+
+ ALIGN
+
+ ENDIF
+
+ END
+
+;************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE*****
diff --git a/board/NUCLEO_STM32G071RB/TOS_CONFIG/tos_config.h b/board/NUCLEO_STM32G071RB/TOS_CONFIG/tos_config.h
new file mode 100644
index 00000000..3560f294
--- /dev/null
+++ b/board/NUCLEO_STM32G071RB/TOS_CONFIG/tos_config.h
@@ -0,0 +1,37 @@
+#ifndef _TOS_CONFIG_H_
+#define _TOS_CONFIG_H_
+
+#include "stm32g0xx.h"
+
+#define TOS_CFG_TASK_PRIO_MAX 10u
+
+#define TOS_CFG_ROUND_ROBIN_EN 1u
+
+#define TOS_CFG_OBJECT_VERIFY_EN 0u
+
+#define TOS_CFG_TASK_DYNAMIC_CREATE_EN 0u
+
+#define TOS_CFG_EVENT_EN 1u
+
+#define TOS_CFG_MMBLK_EN 1u
+
+#define TOS_CFG_MMHEAP_EN 1u
+
+#define TOS_CFG_MMHEAP_DEFAULT_POOL_SIZE 0x100
+
+#define TOS_CFG_MUTEX_EN 1u
+
+#define TOS_CFG_TIMER_EN 1u
+
+#define TOS_CFG_SEM_EN 1u
+
+#define TOS_CFG_IDLE_TASK_STK_SIZE 128u
+
+#define TOS_CFG_CPU_TICK_PER_SECOND 1000u
+
+#define TOS_CFG_CPU_CLOCK (SystemCoreClock)
+
+#define TOS_CFG_TIMER_AS_PROC 1u
+
+#endif
+