【CH32V208开发板】HarmonyOS移植

CH32V208开发板开发板使用沁恒CH32V208WBU6主控,RISC-V架构。片内资源RAM:64KB，Flash:128KB（RAM,Flash可灵活配置）。开环环境IDE:MounRiver Studio.
官方SDK有移植好HarmonyOS的例程，这里做下梳理与学习。工程如下：

1.工程中加载了LiteOS库。在ch32v20x_it.c配置好了中断接入。system_ch32v20x.c配置好了主频与时钟节拍。

2.在main函数可以看到引用系统头文件

#include "debug.h"
#include "los_tick.h"
#include "los_task.h"
#include "los_config.h"
#include "los_interrupt.h"
#include "los_debug.h"
#include "los_compiler.h"

3.主函数如下，初始化了系统时钟、串口及LiteOS内核。通过taskSample创建示例任务，并随后 LOS_Start();启动。

LITE_OS_SEC_TEXT_INIT int main(void)
{
    unsigned int ret;

	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
    SystemCoreClockUpdate();
    Delay_Init();
	USART_Printf_Init(115200);
	printf("SystemClk:%d\r\n",SystemCoreClock);
	printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );

    ret = LOS_KernelInit();
    taskSample();
    if (ret == LOS_OK)
    {
        LOS_Start();
    }

    printf("shouldn't run at here!!!\r\n");
    while (1) {
        __asm volatile("nop");
    }

}

4.任务创建如下，任务创建API为LOS_TaskCreate，创建了任务taskSampleEntry1和taskSampleEntry2

UINT32 taskSample(VOID)
{
    UINT32  uwRet;
    UINT32 taskID1,taskID2;
    TSK_INIT_PARAM_S stTask={0};
    stTask.pfnTaskEntry = (TSK_ENTRY_FUNC)taskSampleEntry1;
    stTask.uwStackSize  = 0X500;
    stTask.pcName       = "taskSampleEntry1";
    stTask.usTaskPrio   = 6;/* high priority */
    uwRet = LOS_TaskCreate(&taskID1, &stTask);
    if (uwRet != LOS_OK) {
        printf("create task1 failed\n");
    }

    stTask.pfnTaskEntry = (TSK_ENTRY_FUNC)taskSampleEntry2;
    stTask.uwStackSize  = 0X500;
    stTask.pcName       = "taskSampleEntry2";
    stTask.usTaskPrio   = 7;/* low priority */
    uwRet = LOS_TaskCreate(&taskID2, &stTask);
    if (uwRet != LOS_OK) {
        printf("create task2 failed\n");
    }

    EXTI0_INT_INIT();
    return LOS_OK;
}

5.任务函数如下，可以看到循环延时2s/10s打印SP寄存器地址

VOID taskSampleEntry1(VOID)
{
    while(1) {
      LOS_TaskDelay(2000);
      printf("taskSampleEntry1 running,task1 SP:%08x\n",__get_SP());
    }

}
VOID taskSampleEntry2(VOID)
{
    while(1) {
      LOS_TaskDelay(10000);
      printf("taskSampleEntry2 running,task2 SP:%08x\n",__get_SP());
    }
}

6.编译烧录，日志如下

对于LiteOS库可以做更输入了解，作为国产系统，还是值得推广应用的。从日志也可看出，HarmonyOS系统正常运行了起来。