求助！关于TIM3定时器的问题

wangpaofeng

(这是我用到的两个脚，其中TIM2后面有_ETR  而TIM3    没有不知道是不是这个原因)
我用到了TIM2和TIM3做外部计数，TIM5控制技术时间两个初始化完全一样，中断函数也完全一样，（除了TIM后面的数字），为什么在TIM5终端中处理两个数的结果不一样
void TIM5_IRQHandler(void)   //TIM3????
{
u16 speed;
if (TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(TIM5, TIM_IT_Update );  
//   GPIO_WriteBit(GPIOA,GPIO_Pin_15,Bit_RESET);
count0=TIM2->CNT;
count1=TIM3->CNT;
// count0=65535*test_1+count0;
// count1=65535*test_2+count1;
LCD_ShowNum(50,160,count0,16,16);
LCD_ShowNum(50,180,test_1,16,16);
LCD_ShowNum(50,200,count1,16,16);
LCD_ShowNum(50,220,test_2,16,16);
}
}
下面是TIM23的初始化 

[mw_shl_code=c,true]void Timer2_Init(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //???????? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //50M?±?????? GPIO_Init(GPIOA, &GPIO_InitStructure); RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //?±?????? TIM_DeInit(TIM2); TIM_TimeBaseStructure.TIM_Period = arr; //?è???????????ü??????×°????????×?????×°???????÷???????? ??????5000??500ms arr TIM_TimeBaseStructure.TIM_Prescaler =psc; //?è??????×÷??TIMx?±?????????????¤·????? 10Khz?????????? TIM_TimeBaseStructure.TIM_ClockDivision = 0; //?è0???±??·???:TDTS = Tck_tim psc TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM?ò?????????? TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //?ù??TIM_TimeBaseInitStruct?????¨????????????TIMx???±???ù?????? TIM_ETRClockMode2Config(TIM2, TIM_ExtTRGPSC_OFF, TIM_ExtTRGPolarity_NonInverted, 0); //?è???????????????? TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);//???í?ü?????? ,???íCC1IE???????? TIM_SetCounter(TIM2, 0); //?????÷???? TIM_Cmd(TIM2, ENABLE); //????TIMx???è NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; //TIM2???? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //??????????2?? NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //????????0?? NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??±????? NVIC_Init(&NVIC_InitStructure); //?ù??NVIC_InitStruct?????¨???????????????èNVIC?????÷ } void Timer3_Init(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //???????? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //50M?±?????? GPIO_Init(GPIOA, &GPIO_InitStructure); RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //?±?????? TIM_DeInit(TIM3); TIM_TimeBaseStructure.TIM_Period = arr; //?è???????????ü??????×°????????×?????×°???????÷???????? ??????5000??500ms arr TIM_TimeBaseStructure.TIM_Prescaler =psc; //?è??????×÷??TIMx?±?????????????¤·????? 10Khz?????????? TIM_TimeBaseStructure.TIM_ClockDivision = 0; //?è0???±??·???:TDTS = Tck_tim psc TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM?ò?????????? TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //?ù??TIM_TimeBaseInitStruct?????¨????????????TIMx???±???ù?????? TIM_ETRClockMode2Config(TIM3, TIM_ExtTRGPSC_OFF, TIM_ExtTRGPolarity_NonInverted, 0); //?è???????????????? TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);//???í?ü?????? ,???íCC1IE???????? TIM_SetCounter(TIM3, 0); //?????÷???? TIM_Cmd(TIM3, ENABLE); //????TIMx???è NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM2???? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //??????????2?? NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //????????0?? NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??±????? NVIC_Init(&NVIC_InitStructure); //?ù??NVIC_InitStruct?????¨???????????????èNVIC?????÷ } void TIM2_IRQHandler(void) { // if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) //?ì?é???¨??TIM????·??ú??·?:TIM ?????? // { TIM_ClearITPendingBit(TIM2, TIM_IT_Update ); //????TIMx???????????í??:TIM ?????? test_1++; // } } void TIM3_IRQHandler(void) { // if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) //?ì?é???¨??TIM????·??ú??·?:TIM ?????? // { TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //????TIMx???????????í??:TIM ?????? test_2++; // } }[/mw_shl_code]

烟酒不沾

void TIM3_IRQHandler(void)  
77
{  
78
//  if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) //?ì?é???¨??TIM????·??ú??·?:TIM ??????
79
//      {
80
        TIM_ClearITPendingBit(TIM3, TIM_IT_Update );  //????TIMx???????????í??:TIM ??????
81
        test_2++;
82
//      }
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84
         
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}
你上面的定时器3的中断中判断的是定时器2的中断标志啊？怎么进3呢？那个if语句最好释放加以判断！

烟酒不沾

没发现明显问题，两上通道相差大吗？有没有发现什么规律？

wangpaofeng

回复【2楼】烟酒不沾:
---------------------------------
我将一个点灯程序
while(1)
{
LED0=!LED0;
delay_ms(100);
}
分别放在TIM2_IRQHandler和TIM3_IRQHandler里测试是否进入中断，发现根本不进入TIM3溢出中断