本人STM32初學者，此程序在正點原子Mini平臺上運行。
測試過可以使用，不對語句進行解釋，只用于初步學習。
主函數：
#include "led.h"
#include "delay.h"
#include "sys.h"
#include "tim1.h"
int main (void)
{
delay_init()
NVIC_PriorityGroupConfig( NVIC_PriorityGroup_2)
LED_Init();
TIM7_Init(4999,7199);
while(1)
{
delay_ms(1000);
LED0=!LED0;
}
}
定時器函數;
#include "tim1.h"
#include "led.h"
void TIM7_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
NVIC_InitTypeDef NVIC_InitStruct;
//RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM7,ENABLE);
//¶¨ê±Æ÷1μÄéèÖÃ￡¨¶¨ê±Æ÷1oí2Ö»óDÏòéϼÆêyÄ￡ê½￡©
TIM_TimeBaseInitStruct.TIM_Period=arr;
TIM_TimeBaseInitStruct.TIM_Prescaler=psc;//Ô¤·ÖÆμÏμêy
TIM_TimeBaseInitStruct.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInitStruct.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInit(TIM7,&TIM_TimeBaseInitStruct);
TIM_ITConfig(TIM7,TIM_IT_Update,ENABLE);//ÔêDí¸üDÂÖD¶Ï
NVIC_InitStruct.NVIC_IRQChannel=TIM7_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=0;
NVIC_InitStruct.NVIC_IRQChannelSubPriority=3;
NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStruct);
TIM_Cmd(TIM7,ENABLE);
}
void TIM7_IRQHandler()
{
if(TIM_GetITStatus(TIM7,TIM_IT_Update)!=RESET)
{
TIM_ClearITPendingBit(TIM7, TIM_IT_Update);
LED=!LED;
}
}
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