#include "debug.h"
#include "ch32v30x.h"

volatile uint16_t SysTickCnt=0;

void SysTick_inIT(void)
{
    /*配置中断优先级*/
    NVIC_InitTyPEDef NVIC_InitStructure = {0};
    NVIC_InitStructure.NVIC_IRQChannel = SysTicK_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPReemptionPriority = 0;//抢占式优先级
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;//响应式优先级
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能
    NVIC_Init(&NVIC_InitStructure);

    /*配置定时器*/
    SysTick->CTLR= 0;
    SysTick->SR  = 0;
    SysTick->CNT = 0;
    SysTick->CMP = SystemCoreclock/1000;//后面的1000代表1000HZ(那就是1ms进一次中断)
    SysTick->CTLR= 0xf;
}

__attribute__((interrupt("WCH-interrupt-fast")))
void SysTick_Handler(void)
{
    SysTick->SR=0;//清除中断
    SysTickCnt++;
}

int main(void)
{
    NVIC_PriorityGroupconfig(NVIC_PriorityGroup_2);//设置优先级分组为2
    USART_Printf_Init(115200);
    SysTick_init();
    while(1)
    {
        if (SysTickCnt>=1000) {
            SysTickCnt=0;
            printf("1111111111rn");
        }
    }
}