stm32f107vct6的TIM1输出PWM波，找了两天了，还没找出来问题在哪，大家帮帮忙

zhoutaoqlt2 · 发表于 2019-12-27 10:25:12

#include "timer.h"
#include "stm32f10x.h"
#include "led.h"
#include "delay.h"
void TIM1_PWM_Init(u16 arr,u16 psc)
{
RCC->APB2ENR|=1<<11; //TIM1和GPIO时钟使能
RCC->APB2ENR|=1<<6;

GPIOE->CRH&=0XFFFF0FFF;
GPIOE->CRH|=0X0000B000;

RCC->APB2ENR|=1<<0;  //开启辅助时钟
AFIO->MAPR&=0XFFFFFF3F;
AFIO->MAPR|=0X000000C0;//PE11开启复用推挽输出

TIM1->ARR=arr;  //设定重装载值
TIM1->PSC=psc;  //设置分频

TIM1->DIER|=1<<0;  //允许跟新中断
MY_NVIC_Init(1,3,TIM1_UP_IRQn,2);

TIM1->CCMR1|=7<<12;  //CH2 PWM2模式
TIM1->CCMR1|=1<<11;  //输出比较2预装载使能
TIM1->CCER|=1<<4;  //OC2输出使能

TIM1->CR1|=0X0080;  //自动重装载预装载允许位
TIM1->CR1|=1<<0;  //使能计数器1

TIM1->BDTR|=1<<15;  //TIM1主输出使能
}
void TIM1_UP_IRQHandler()
{
LED=!LED;
delay_ms(500);
TIM3->SR&=~(1<<0);
}