stm32f107的TIM1输出PWM波寄存器咋就输出不了PWM波

zhoutaoqlt2

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

GPIOE->CRH&=0XFFFF0FFF;       //PE11
GPIOE->CRH|=0X0000B000;

RCC->APB2ENR|=1<<0;  
AFIO->MAPR&=0XFFFFFF3F;
AFIO->MAPR|=0X000000C0;

TIM1->ARR=arr;  
TIM1->PSC=psc;

TIM1->DIER|=1<<0;
MY_NVIC_Init(1,3,TIM1_UP_IRQn,2);

TIM1->CCMR1|=7<<12;  
TIM1->CCMR1|=1<<11;  
TIM1->CCER|=1<<4;  

TIM1->CR1|=0X0080;
TIM1->CR1|=1<<0;

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