请教各位TIM9，PWM波的问题。

Yefeng是叶峰 · 发表于 2019-1-21 17:26:16

看着原子哥的例程写的PWM程序，可是一点反应的没有，我用的是F407，PE5引脚，各位网友能帮我看看什么地方不对吗？
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM9,ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);

GPIO_PinAFConfig(GPIOE,GPIO_PinSource5,GPIO_AF_TIM9);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOE,&GPIO_InitStructure);

TIM_TimeBaseStructure.TIM_Prescaler=167;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period=1000;
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;

TIM_TimeBaseInit(TIM9,&TIM_TimeBaseStructure);//3

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
   TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OC1Init(TIM9, &TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM9, TIM_OCPreload_Enable);

TIM_ARRPreloadConfig(TIM9,ENABLE);

TIM_Cmd(TIM9, ENABLE);