【CH32V305FBP6】4. systick 配置

配置

main.c

void SYSTICK_Init_Config(u_int64_t ticks)
{SysTick->SR &= ~(1 << 0);//clear State flagSysTick->CMP = ticks - 1;SysTick->CNT = 0;SysTick->CTLR = 0xF;NVIC_SetPriority(SysTicK_IRQn, 15);NVIC_EnableIRQ(SysTicK_IRQn);
}

中断计数

main.c

uint32_t counter = 0;
void SysTick_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));void SysTick_Handler(void)
{if(SysTick->SR == 1){SysTick->SR = 0;//clear State flagcounter++;printf("Counter:%d\r\n",counter);}
}

周期配置

main.c

秒

	SYSTICK_Init_Config(SystemCoreClock);

毫秒

	SYSTICK_Init_Config(SystemCoreClock/1000);