diff --git a/board/GigaDevice_GD32VF103C_EVAL/.project b/board/GigaDevice_GD32VF103C_EVAL/.project
new file mode 100644
index 00000000..87584654
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/.project
@@ -0,0 +1,11 @@
+
+
+ GigaDevice_GD32VF103C_START
+
+
+
+
+
+
+
+
diff --git a/board/GigaDevice_GD32VF103C_EVAL/BSP/Inc/mcu_init.h b/board/GigaDevice_GD32VF103C_EVAL/BSP/Inc/mcu_init.h
new file mode 100644
index 00000000..7f906dd8
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/BSP/Inc/mcu_init.h
@@ -0,0 +1,9 @@
+#ifndef __MCU_INIT_H
+#define __MCU_INIT_H
+
+#include "gd32vf103.h"
+#include "usart.h"
+
+void board_init();
+
+#endif //__MCU_INIT_H
diff --git a/board/GigaDevice_GD32VF103C_EVAL/BSP/Inc/usart.h b/board/GigaDevice_GD32VF103C_EVAL/BSP/Inc/usart.h
new file mode 100644
index 00000000..bb5f1594
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/BSP/Inc/usart.h
@@ -0,0 +1,10 @@
+#ifndef __USART_H
+#define __USART_H
+
+#define USART0_GPIO_TX_PIN GPIO_PIN_9
+#define USART0_GPIO_RX_PIN GPIO_PIN_10
+#define USART0_GPIO_PORT GPIOA
+
+void usart0_init(int baud);
+
+#endif // __USART_H
diff --git a/board/GigaDevice_GD32VF103C_EVAL/BSP/Src/gd32vf103_it.c b/board/GigaDevice_GD32VF103C_EVAL/BSP/Src/gd32vf103_it.c
new file mode 100644
index 00000000..aa33583b
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/BSP/Src/gd32vf103_it.c
@@ -0,0 +1,11 @@
+#include "tos.h"
+
+// systick handler
+void eclic_mtip_handler() {
+ port_systick_config((uint32_t)k_cpu_cycle_per_tick);
+ if (tos_knl_is_running()) {
+ tos_knl_irq_enter();
+ tos_tick_handler();
+ tos_knl_irq_leave();
+ }
+}
diff --git a/board/GigaDevice_GD32VF103C_EVAL/BSP/Src/mcu_init.c b/board/GigaDevice_GD32VF103C_EVAL/BSP/Src/mcu_init.c
new file mode 100644
index 00000000..3bf35474
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/BSP/Src/mcu_init.c
@@ -0,0 +1,15 @@
+#include "mcu_init.h"
+
+void board_init() {
+
+ SystemInit();
+
+ rcu_periph_clock_enable(RCU_GPIOC);
+ rcu_periph_clock_enable(RCU_GPIOE);
+
+ gpio_init(GPIOC, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0 | GPIO_PIN_2);
+ gpio_init(GPIOE, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0 | GPIO_PIN_1);
+
+ gpio_bit_reset(GPIOC, GPIO_PIN_0 | GPIO_PIN_2);
+ gpio_bit_reset(GPIOE, GPIO_PIN_0 | GPIO_PIN_1);
+}
diff --git a/board/GigaDevice_GD32VF103C_EVAL/BSP/Src/usart.c b/board/GigaDevice_GD32VF103C_EVAL/BSP/Src/usart.c
new file mode 100644
index 00000000..9d6c0d6f
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/BSP/Src/usart.c
@@ -0,0 +1,28 @@
+#include "gd32vf103.h"
+#include "usart.h"
+void usart0_init(int baud)
+{
+ /* enable GPIO clock */
+ rcu_periph_clock_enable(RCU_GPIOA);
+
+ /* enable USART0 clock */
+ rcu_periph_clock_enable(RCU_USART0);
+
+ /* connect port to USART0_Tx */
+ gpio_init(USART0_GPIO_PORT, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, USART0_GPIO_TX_PIN);
+
+ /* connect port to USART0_Rx */
+ gpio_init(USART0_GPIO_PORT, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, USART0_GPIO_RX_PIN);
+
+ /* USART0 configure */
+ usart_deinit(USART0);
+ usart_baudrate_set(USART0, baud);
+ usart_word_length_set(USART0, USART_WL_8BIT);
+ usart_stop_bit_set(USART0, USART_STB_1BIT);
+ usart_parity_config(USART0, USART_PM_NONE);
+ usart_hardware_flow_rts_config(USART0, USART_RTS_DISABLE);
+ usart_hardware_flow_cts_config(USART0, USART_CTS_DISABLE);
+ usart_receive_config(USART0, USART_RECEIVE_ENABLE);
+ usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
+ usart_enable(USART0);
+}
diff --git a/board/GigaDevice_GD32VF103C_EVAL/TOS_CONFIG/tos_config.h b/board/GigaDevice_GD32VF103C_EVAL/TOS_CONFIG/tos_config.h
new file mode 100644
index 00000000..e007b9ec
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/TOS_CONFIG/tos_config.h
@@ -0,0 +1,70 @@
+#ifndef INC_TOS_CONFIG_H_
+#define INC_TOS_CONFIG_H_
+
+#include "gd32vf103.h"
+#include "stddef.h"
+
+// 配置TencentOS tiny默认支持的最大优先级数量
+#define TOS_CFG_TASK_PRIO_MAX 10u
+
+// 配置TencentOS tiny的内核是否开启时间片轮转
+#define TOS_CFG_ROUND_ROBIN_EN 0u
+
+// 配置TencentOS tiny是否校验指针合法
+#define TOS_CFG_OBJECT_VERIFY 0u
+
+// TencentOS tiny 事件模块功能宏
+#define TOS_CFG_EVENT_EN 1u
+
+// 配置TencentOS tiny是否开启动态内存模块
+#define TOS_CFG_MMHEAP_EN 1u
+
+// 配置TencentOS tiny动态内存池大小
+#define TOS_CFG_MMHEAP_DEFAULT_POOL_SIZE 8192
+
+// 配置TencentOS tiny是否开启互斥锁模块
+#define TOS_CFG_MUTEX_EN 1u
+
+// 配置TencentOS tiny是否开启队列模块
+#define TOS_CFG_QUEUE_EN 1u
+
+// 配置TencentOS tiny是否开启软件定时器模块
+#define TOS_CFG_TIMER_EN 0u
+
+// 配置TencentOS tiny是否开启信号量模块
+#define TOS_CFG_SEM_EN 1u
+
+#define TOS_CFG_CPU_SYSTICK_PRIO 0xF
+
+#if (TOS_CFG_QUEUE_EN > 0u)
+#define TOS_CFG_MSG_EN 1u
+#else
+#define TOS_CFG_MSG_EN 0u
+#endif
+
+// 配置TencentOS tiny消息队列大小
+#define TOS_CFG_MSG_POOL_SIZE 10u
+
+// 配置TencentOS tiny空闲任务栈大小
+#define TOS_CFG_IDLE_TASK_STK_SIZE 512u
+
+// 配置TencentOS tiny中断栈大小
+#define TOS_CFG_IRQ_STK_SIZE 128u
+
+// 配置TencentOS tiny的tick频率
+#define TOS_CFG_CPU_TICK_PER_SECOND 1000u
+
+// 配置TencentOS tiny CPU频率
+// 除4的原因是，Bumblebee内核通过core_clk_aon四分频来更新mtime寄存器
+// 具体信息参见《Bumblebee内核简明数据手册》
+#define TOS_CFG_CPU_CLOCK (SystemCoreClock/4)
+
+// 配置是否将TIMER配置成函数模式
+#define TOS_CFG_TIMER_AS_PROC 1u
+
+#define TOS_CFG_VFS_EN 1u
+
+#define TOS_CFG_MMBLK_EN 1u
+
+
+#endif /* INC_TOS_CONFIG_H_ */
diff --git a/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/.cproject b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/.cproject
new file mode 100644
index 00000000..28693a92
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/.cproject
@@ -0,0 +1,438 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/.gitignore b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/.gitignore
new file mode 100644
index 00000000..3df573fe
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/.gitignore
@@ -0,0 +1 @@
+/Debug/
diff --git a/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/.project b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/.project
new file mode 100644
index 00000000..c505a084
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/.project
@@ -0,0 +1,94 @@
+
+
+ hello_world
+
+
+
+
+
+ org.eclipse.cdt.managedbuilder.core.genmakebuilder
+ clean,full,incremental,
+
+
+
+
+ org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder
+ full,incremental,
+
+
+
+
+
+ org.eclipse.cdt.core.cnature
+ org.eclipse.cdt.managedbuilder.core.managedBuildNature
+ org.eclipse.cdt.managedbuilder.core.ScannerConfigNature
+
+
+
+ Application
+ 2
+ virtual:/virtual
+
+
+ GD32VF103_Firmware_Library
+ 2
+ $%7BPARENT-4-PROJECT_LOC%7D/platform/vendor_bsp/gd/GD32VF103_Firmware_Library
+
+
+ TencentOS_tiny
+ 2
+ virtual:/virtual
+
+
+ Application/Inc
+ 2
+ $%7BPARENT-2-PROJECT_LOC%7D/BSP/Inc
+
+
+ Application/Src
+ 2
+ $%7BPARENT-2-PROJECT_LOC%7D/BSP/Src
+
+
+ Application/tos_config.h
+ 1
+ $%7BPARENT-2-PROJECT_LOC%7D/TOS_CONFIG/tos_config.h
+
+
+ TencentOS_tiny/arch
+ 2
+ virtual:/virtual
+
+
+ TencentOS_tiny/kernel
+ 2
+ $%7BPARENT-4-PROJECT_LOC%7D/kernel
+
+
+ TencentOS_tiny/arch/risc-v
+ 2
+ virtual:/virtual
+
+
+ TencentOS_tiny/arch/risc-v/bumblebee
+ 2
+ TOP_DIR/arch/risc-v/bumblebee/gcc
+
+
+ TencentOS_tiny/arch/risc-v/common
+ 2
+ $%7BPARENT-4-PROJECT_LOC%7D/arch/risc-v/common
+
+
+ TencentOS_tiny/arch/risc-v/rv32i
+ 2
+ TOP_DIR/arch/risc-v/rv32i/gcc
+
+
+
+
+ TOP_DIR
+ $%7BPARENT-4-PROJECT_LOC%7D
+
+
+
diff --git a/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/gd32vf103_libopt.h b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/gd32vf103_libopt.h
new file mode 100644
index 00000000..875ff748
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/gd32vf103_libopt.h
@@ -0,0 +1,61 @@
+/*!
+ \file gd32vf103_libopt.h
+ \brief library optional for gd32vf103
+
+ \version 2019-6-5, V1.0.0, demo for GD32VF103
+*/
+
+/*
+ Copyright (c) 2019, GigaDevice Semiconductor Inc.
+
+ Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+ 3. Neither the name of the copyright holder nor the names of its contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+OF SUCH DAMAGE.
+*/
+
+#ifndef GD32VF103_LIBOPT_H
+#define GD32VF103_LIBOPT_H
+
+#include "gd32vf103_adc.h"
+#include "gd32vf103_bkp.h"
+#include "gd32vf103_can.h"
+#include "gd32vf103_crc.h"
+#include "gd32vf103_dac.h"
+#include "gd32vf103_dma.h"
+#include "gd32vf103_eclic.h"
+#include "gd32vf103_exmc.h"
+#include "gd32vf103_exti.h"
+#include "gd32vf103_fmc.h"
+#include "gd32vf103_gpio.h"
+#include "gd32vf103_i2c.h"
+#include "gd32vf103_fwdgt.h"
+#include "gd32vf103_dbg.h"
+#include "gd32vf103_pmu.h"
+#include "gd32vf103_rcu.h"
+#include "gd32vf103_rtc.h"
+#include "gd32vf103_spi.h"
+#include "gd32vf103_timer.h"
+#include "gd32vf103_usart.h"
+#include "gd32vf103_wwdgt.h"
+#include "n200_func.h"
+
+#endif /* GD32VF103_LIBOPT_H */
diff --git a/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/link.lds b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/link.lds
new file mode 100644
index 00000000..1c32e640
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/link.lds
@@ -0,0 +1,175 @@
+OUTPUT_ARCH( "riscv" )
+
+ENTRY( _start )
+
+MEMORY
+{
+ /* Run in FLASH */
+ flash (rxai!w) : ORIGIN = 0x08000000, LENGTH = 128k
+ ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 32K
+
+ /* Run in RAM */
+/* flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 24k
+ ram (wxa!ri) : ORIGIN = 0x20006000, LENGTH = 8K
+*/
+}
+
+
+SECTIONS
+{
+ __stack_size = DEFINED(__stack_size) ? __stack_size : 2K;
+
+
+ .init :
+ {
+ KEEP (*(SORT_NONE(.init)))
+ } >flash AT>flash
+
+ .ilalign :
+ {
+ . = ALIGN(4);
+ PROVIDE( _ilm_lma = . );
+ } >flash AT>flash
+
+ .ialign :
+ {
+ PROVIDE( _ilm = . );
+ } >flash AT>flash
+
+ .text :
+ {
+ *(.rodata .rodata.*)
+ *(.text.unlikely .text.unlikely.*)
+ *(.text.startup .text.startup.*)
+ *(.text .text.*)
+ *(.gnu.linkonce.t.*)
+ } >flash AT>flash
+
+ .fini :
+ {
+ KEEP (*(SORT_NONE(.fini)))
+ } >flash AT>flash
+
+ . = ALIGN(4);
+
+ PROVIDE (__etext = .);
+ PROVIDE (_etext = .);/*0x80022c8*/
+ PROVIDE (etext = .);/*0x80022c8*/
+ PROVIDE( _eilm = . );
+
+ .preinit_array :
+ {
+ PROVIDE_HIDDEN (__preinit_array_start = .);
+ KEEP (*(.preinit_array))
+ PROVIDE_HIDDEN (__preinit_array_end = .);
+ } >flash AT>flash
+
+ .init_array :
+ {
+ PROVIDE_HIDDEN (__init_array_start = .);
+ KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
+ KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
+ PROVIDE_HIDDEN (__init_array_end = .);
+ } >flash AT>flash
+
+ .fini_array :
+ {
+ PROVIDE_HIDDEN (__fini_array_start = .);
+ KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
+ KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
+ PROVIDE_HIDDEN (__fini_array_end = .);
+ } >flash AT>flash
+
+ .ctors :
+ {
+ /* gcc uses crtbegin.o to find the start of
+ the constructors, so we make sure it is
+ first. Because this is a wildcard, it
+ doesn't matter if the user does not
+ actually link against crtbegin.o; the
+ linker won't look for a file to match a
+ wildcard. The wildcard also means that it
+ doesn't matter which directory crtbegin.o
+ is in. */
+ KEEP (*crtbegin.o(.ctors))
+ KEEP (*crtbegin?.o(.ctors))
+ /* We don't want to include the .ctor section from
+ the crtend.o file until after the sorted ctors.
+ The .ctor section from the crtend file contains the
+ end of ctors marker and it must be last */
+ KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*(.ctors))
+ } >flash AT>flash
+
+ .dtors :
+ {
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*crtbegin?.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*(.dtors))
+ } >flash AT>flash
+
+ . = ALIGN(4);
+ PROVIDE( _eilm = . );
+
+ .lalign :
+ {
+ . = ALIGN(4);
+ PROVIDE( _data_lma = . );
+ } >flash AT>flash
+
+ .dalign :
+ {
+ . = ALIGN(4);
+ PROVIDE( _data = . );
+ } >ram AT>flash
+
+
+ .data :
+ {
+ *(.rdata)
+
+ *(.gnu.linkonce.r.*)
+ *(.data .data.*)
+ *(.gnu.linkonce.d.*)
+ . = ALIGN(8);
+ PROVIDE( __global_pointer$ = . + 0x800);
+ *(.sdata .sdata.*)
+ *(.gnu.linkonce.s.*)
+ . = ALIGN(8);
+ *(.srodata.cst16)
+ *(.srodata.cst8)
+ *(.srodata.cst4)
+ *(.srodata.cst2)
+ *(.srodata .srodata.*)
+ } >ram AT>flash
+
+ . = ALIGN(4);
+ PROVIDE( _edata = . );
+ PROVIDE( edata = . );
+
+ PROVIDE( _fbss = . ); /*0X200052A0 0X200002A0*/
+ PROVIDE( __bss_start = . );
+ .bss :
+ {
+ *(.sbss*)
+ *(.gnu.linkonce.sb.*)
+ *(.bss .bss.*)
+ *(.gnu.linkonce.b.*)
+ *(COMMON)
+ . = ALIGN(4);
+ } >ram AT>ram
+
+ . = ALIGN(8);
+ PROVIDE( _end = . ); /*0X2000,0340*/
+ PROVIDE( end = . );
+
+ .stack ORIGIN(ram) + LENGTH(ram) - __stack_size :
+ {
+ PROVIDE( _heap_end = . );
+ . = __stack_size;
+ PROVIDE( _sp = . );
+ } >ram AT>ram
+}
diff --git a/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/main.c b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/main.c
new file mode 100644
index 00000000..08a84995
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/main.c
@@ -0,0 +1,71 @@
+#include "mcu_init.h"
+#include "tos.h"
+
+#define TASK_SIZE 1024
+k_task_t k_task_task1;
+k_task_t k_task_task2;
+uint8_t k_task1_stk[TASK_SIZE];
+uint8_t k_task2_stk[TASK_SIZE];
+
+void task1(void *pdata)
+{
+ int task_cnt1 = 0;
+ while (1) {
+ printf("hello world from %s cnt: %d\n", __func__, task_cnt1++);
+ if (task_cnt1 % 2 == 0)
+ {
+ gpio_bit_write(GPIOC, GPIO_PIN_0,SET);
+ gpio_bit_write(GPIOC, GPIO_PIN_2,SET);
+ }
+ else
+ {
+ gpio_bit_write(GPIOC, GPIO_PIN_0,RESET);
+ gpio_bit_write(GPIOC, GPIO_PIN_2,RESET);
+ }
+ tos_task_delay(1000);
+ }
+}
+
+void task2(void *pdata)
+{
+ int task_cnt2 = 0;
+ while (1) {
+ printf("hello world from %s cnt: %d\n", __func__, task_cnt2++);
+ if (task_cnt2 %2 == 0)
+ {
+ gpio_bit_write(GPIOE, GPIO_PIN_0,SET);
+ gpio_bit_write(GPIOE, GPIO_PIN_1,SET);
+ }
+ else
+ {
+ gpio_bit_write(GPIOE, GPIO_PIN_0,RESET);
+ gpio_bit_write(GPIOE, GPIO_PIN_1,RESET);
+ }
+ tos_task_delay(500);
+ }
+}
+
+
+void main(void) {
+ board_init();
+
+ usart0_init(115200);
+
+ tos_knl_init();
+
+ tos_task_create(&k_task_task1, "task1", task1, NULL, 3, k_task1_stk, TASK_SIZE, 0);
+ tos_task_create(&k_task_task2, "task2", task2, NULL, 3, k_task2_stk, TASK_SIZE, 0);
+
+ tos_knl_start();
+
+}
+
+
+int _put_char(int ch)
+{
+ usart_data_transmit(USART0, (uint8_t) ch );
+ while (usart_flag_get(USART0, USART_FLAG_TBE)== RESET){
+ }
+
+ return ch;
+}
diff --git a/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/openocd_gdlink.cfg b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/openocd_gdlink.cfg
new file mode 100644
index 00000000..3ec85d42
--- /dev/null
+++ b/board/GigaDevice_GD32VF103C_EVAL/eclipse/hello_world/openocd_gdlink.cfg
@@ -0,0 +1,45 @@
+adapter_khz 1000
+reset_config srst_only
+adapter_nsrst_assert_width 100
+
+
+
+interface cmsis-dap
+
+transport select jtag
+
+#autoexit true
+
+set _CHIPNAME riscv
+jtag newtap $_CHIPNAME cpu -irlen 5 -expected-id 0x1000563d
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME riscv -chain-position $_TARGETNAME
+$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size 20480 -work-area-backup 0
+
+
+# Work-area is a space in RAM used for flash programming
+if { [info exists WORKAREASIZE] } {
+ set _WORKAREASIZE $WORKAREASIZE
+} else {
+ set _WORKAREASIZE 0x5000
+}
+
+# Allow overriding the Flash bank size
+if { [info exists FLASH_SIZE] } {
+ set _FLASH_SIZE $FLASH_SIZE
+} else {
+ # autodetect size
+ set _FLASH_SIZE 0
+}
+
+# flash size will be probed
+set _FLASHNAME $_CHIPNAME.flash
+
+flash bank $_FLASHNAME gd32vf103 0x08000000 0 0 0 $_TARGETNAME
+riscv set_reset_timeout_sec 1
+init
+
+halt
+
+