add mqtt-iothub project on EVB_G0 Board

platform/hal/st/stm32g0xx/src/tos_hal_uart.c

@@ -0,0 +1,97 @@
+#include "tos_k.h"
+#include "tos_hal.h"
+#include "stm32g0xx_hal.h"
+#include "usart.h"
+
+__API__ int tos_hal_uart_init(hal_uart_t *uart, hal_uart_port_t port)
+{
+    if (!uart) {
+        return -1;
+    }
+
+    if (port == HAL_UART_PORT_1) {
+        uart->private_uart = &huart1;
+        MX_USART1_UART_Init();
+    } else if (port == HAL_UART_PORT_2) {
+        uart->private_uart = &huart2;
+        MX_USART2_UART_Init();
+    } else if (port == HAL_UART_PORT_3) {
+        uart->private_uart = &huart3;
+        MX_USART3_UART_Init();
+    } else if (port == HAL_UART_PORT_4) {
+        uart->private_uart = &huart4;
+        MX_USART4_UART_Init();
+    }
+
+    return 0;
+}
+
+__API__ int tos_hal_uart_write(hal_uart_t *uart, const uint8_t *buf, size_t size, uint32_t timeout)
+{
+    HAL_StatusTypeDef hal_status;
+    UART_HandleTypeDef *uart_handle;
+
+    if (!uart || !buf) {
+        return -1;
+    }
+
+    if (!uart->private_uart) {
+        return -1;
+    }
+
+    uart_handle = (UART_HandleTypeDef *)uart->private_uart;
+
+    hal_status = HAL_UART_Transmit(uart_handle, (uint8_t *)buf, size, timeout);
+    if (hal_status != HAL_OK) {
+        return -1;
+    }
+    return 0;
+}
+
+__API__ int tos_hal_uart_read(hal_uart_t *uart, const uint8_t *buf, size_t size, uint32_t timeout)
+{
+    HAL_StatusTypeDef hal_status;
+    UART_HandleTypeDef *uart_handle;
+
+    if (!uart || !buf) {
+        return -1;
+    }
+
+    if (!uart->private_uart) {
+        return -1;
+    }
+
+    uart_handle = (UART_HandleTypeDef *)uart->private_uart;
+
+    hal_status = HAL_UART_Receive(uart_handle, (uint8_t *)buf, size, timeout);
+    if (hal_status != HAL_OK) {
+        return -1;
+    }
+    return 0;
+}
+
+__API__ int tos_hal_uart_deinit(hal_uart_t *uart)
+{
+    HAL_StatusTypeDef hal_status;
+    UART_HandleTypeDef *uart_handle;
+
+    if (!uart) {
+        return -1;
+    }
+
+    if (!uart->private_uart) {
+        return -1;
+    }
+
+    uart_handle = (UART_HandleTypeDef *)uart->private_uart;
+
+    hal_status = HAL_UART_DeInit(uart_handle);
+    HAL_UART_MspDeInit(uart_handle);
+
+    if (hal_status != HAL_OK) {
+        return -1;
+    }
+
+    return 0;
+}
+