三个定时器使用两路PWM 一路中断输出求问为什么只有一路输出？

hcy33fond · 发表于 2016-3-25 14:26:22

[mw_shl_code=c,true]#include "timer.h"
#include "delay.h"
#include "usart.h"

extern u8 flog;

void TIM2_IRQHandler(void)
{
u16 ADD;
if(TIM2->SR&0X0001)//òç3öÖD¶Ï
{
ADD++;
SCLK=!SCLK;
}
TIM2->SR&=~(1<<0);//Çå3yÖD¶Ï±êÖ¾Î»
if(ADD>50000)
{
flog=~flog;
}
}

void TIM2_Int_Init(u16 arr,u16 psc)
{
// printf("time_set \r\n");
RCC->APB1ENR|=1<<0; //TIM2ê±Öóê1Äü
RCC->APB2ENR|=1<<4;
  GPIOC->CRL&=0XF0FFFFFF;//PC6Çåáã
GPIOC->CRL|=0X03000000;// êä3öÄ￡ê½ 50Mhz

TIM2->ARR=arr;    //éè¶¨¼ÆêyÆ÷×Ô¶ˉÖØ×°Öμ
TIM2->PSC=psc;    //Ô¤·ÖÆμÆ÷éèÖÃ
TIM2->DIER|=1<<0; //ÔêDí¸üDÂÖD¶Ï
TIM2->CR1|=0x01; //ê1Äü¶¨ê±Æ÷2
  MY_NVIC_Init(1,3,TIM2_IRQn,2);//ÇàÕ¼1￡¬×óóÅÏè¼¶3￡¬×é2
}

void TIM3_PWM_Init(u16 arr,u16 psc)
{
RCC->APB1ENR|=1<<1; //TIM3ê±Öóê1Äü
RCC->APB2ENR|=1<<2; //ê1ÄüPORTAê±Öó
RCC->APB2ENR|=1<<3; //ê1ÄüPORTBê±Öó
RCC->APB2ENR|=1<<4;    //ê1ÄüPORTCê±Öó

GPIOC->CRH&=0XFFFFFFF0;//PC8Çåáã
GPIOC->CRH|=0X0000000B;// ¸′Î»1|Äüêä3ö


  RCC->APB2ENR|=1<<0;    //
  AFIO->MAPR&=0XFFFFF3FF; //
  AFIO->MAPR|=3<<10;


TIM3->ARR=arr; //éè¶¨¼ÆêyÆ÷×Ô¶ˉÖØ×°Öμ
TIM3->PSC=psc; //Ô¤·ÖÆμÆ÷2»·ÖÆμ

TIM3->CCMR2|=7<<4;    //CH3 PWM2Ä￡ê½
TIM3->CCMR2|=1<<3;       //CH3Ô¤×°ÔØê1Äü
TIM3->CCER|=1<<8;    //OC3 êä3öê1Äü

TIM3->CCR3=1028;          //OC3 êä3öê1Äü

TIM3->CR1|=1<<7;          //ARPEê1Äü
TIM3->CR1|=0x01; //ê1Äü¶¨ê±Æ÷3
  MY_NVIC_Init(1,2,TIM3_IRQn,2);
}

void TIM4_PWM_Init(u16 arr,u16 psc)
{
//′Ë2¿·ÖDèêÖ¶ˉDT¸ÄIO¿úéèÖÃ
RCC->APB1ENR|=1<<2; //TIM4ê±Öóê1Äü
  RCC->APB2ENR|=1<<2; //ê1ÄüPORTAê±Öó
GPIOA->CRH&=0XFFFFFFF0; //PA8Çå3yÖ®Ç°μÄéèÖÃ
GPIOA->CRH|=0X0000000B; //¸′óÃ1|Äüêä3ö

TIM1->ARR=arr; //éè¶¨¼ÆêyÆ÷×Ô¶ˉÖØ×°Öμ
TIM1->PSC=psc; //Ô¤·ÖÆμÆ÷éèÖÃ

TIM1->CCMR1|=7<<4;    //CH1 PWM2Ä￡ê½
TIM1->CCMR1|=1<<3; //CH1Ô¤×°ÔØê1Äü
TIM1->CCER|=1<<0;    //OC1 êä3öê1Äü
TIM1->BDTR|=1<<15;    //MOE Ö÷êä3öê1Äü

TIM1->CR1=0x0080;    //ARPEê1Äü
TIM1->CR1|=0x01; //ê1Äü¶¨ê±Æ÷1
  MY_NVIC_Init(1,1,TIM4_IRQn,2);
}

[/mw_shl_code]
[mw_shl_code=c,true]#include "sys.h"
#include "delay.h"
#include "timer.h"
#include "usart.h"
u8 flog;

int main(void)
{
Stm32_Clock_Init(9); //Ïμí3ê±ÖóéèÖÃ
delay_init(72);         //Ñóê±3õê¼»ˉ
uart_init(72,9600);  //′®¿ú3õê¼»ˉ

TIM2_Int_Init(100,71);//í¨óÃ¶¨ê±Æ÷ÖD¶Ï3õê¼»ˉ
if(flog){
TIM3_PWM_Init(3199,0); //5KHz
}
else{
TIM4_PWM_Init(2285,0);//7KHz
}

while(1);
}
[/mw_shl_code]

hcy33fond · 发表于 2016-3-25 14:26:23

hcy33fond 发表于 2016-3-27 20:47
改善了我也不知道为什么可能是IO口配置出了错误
我再仔细分析一下

想起来了是中断优先级没有设置好设置好了就可以了提示和我一样的新手们要设置
MY_NVIC_Init(1,1,TIM4_IRQn,2);
括号内第一位主优先级第二位是次优先级第三个是准备设置的中断服务名称第四位是分组组二是两位抢占位两位响应位（通俗来说就是你括号内的第一位和第二位的范围（例如组二就是主0~3 次0~3））再补充一句就是一个程序只能是同一个组！

hcy33fond · 发表于 2016-3-25 14:29:49

[mw_shl_code=c,true]void TIM4_PWM_Init(u16 arr,u16 psc)
{
//′Ë2¿·ÖDèêÖ¶ˉDT¸ÄIO¿úéèÖÃ
RCC->APB1ENR|=1<<2; //TIM4ê±Öóê1Äü
  RCC->APB2ENR|=1<<2; //ê1ÄüPORTAê±Öó
GPIOA->CRH&=0XFFFFFFF0; //PA8Çå3yÖ®Ç°μÄéèÖÃ
GPIOA->CRH|=0X0000000B; //¸′óÃ1|Äüêä3ö

TIM4->ARR=arr; //éè¶¨¼ÆêyÆ÷×Ô¶ˉÖØ×°Öμ
TIM4->PSC=psc; //Ô¤·ÖÆμÆ÷éèÖÃ

TIM4->CCMR1|=7<<4;    //CH1 PWM2Ä￡ê½
TIM4->CCMR1|=1<<3; //CH1Ô¤×°ÔØê1Äü
TIM4->CCER|=1<<0;    //OC1 êä3öê1Äü

TIM4->CR1=0x0080;    //ARPEê1Äü
TIM4->CR1|=0x01; //ê1Äü¶¨ê±Æ÷1
  MY_NVIC_Init(1,1,TIM4_IRQn,2);
}
[/mw_shl_code]  之前的忘记更改了修改一下还是不知道新手求学路