如標題，用TIM2 CH2 輸出PWM 正常，替換為 TIM5 則無法工作。還請給予幫助。

void TIM5_PWMOut_Init(u16 arr, u16 psc, u16 ccp) //PA1管腳PWM輸出控制發(fā)光管電流

{

? ? GPIO_InitTypeDef GPIO_InitStructure={0};

? ? TIM_OCInitTypeDef TIM_OCInitStructure={0};

? ? TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};

? ? RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE );

? ? RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIM5, ENABLE );

? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;

? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

? ? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

? ? GPIO_Init( GPIOA, &GPIO_InitStructure );

? ? TIM_TimeBaseInitStructure.TIM_Period = arr;//定時器周期

? ? TIM_TimeBaseInitStructure.TIM_Prescaler = psc;//預(yù)分頻

? ? TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;//時鐘分頻

? ? TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;//計數(shù)模式

? ? TIM_TimeBaseInit( TIM5, &TIM_TimeBaseInitStructure);

? ? TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;

? ? TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

? ? TIM_OCInitStructure.TIM_Pulse = ccp;

? ? TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

? ? TIM_OC2Init( TIM5, &TIM_OCInitStructure );

? ? TIM_CtrlPWMOutputs(TIM5, ENABLE );

? ? TIM_OC2PreloadConfig( TIM5, TIM_OCPreload_Disable );

? ? TIM_ARRPreloadConfig( TIM5, ENABLE );

? ? TIM_Cmd( TIM5, ENABLE );

}

已找到問題。首先確認TIM5是32位的。

1、TIM_TimeBaseInit（）函數(shù)中 修改

if((TIMx == TIM5)){

? ? ?TIMx->ATRLR_R32 = (uint32_t)TIM_TimeBaseInitStruct->TIM_Period;

?}else{

? ? TIMx->ATRLR = TIM_TimeBaseInitStruct->TIM_Period;

???}

2、TIM_OC2Init（）函數(shù)中修改

if((TIMx == TIM5)){

? ? ? TIMx->CH2CVR_R32 = (uint32_t)TIM_OCInitStruct->TIM_Pulse;

???}else{

? ? ?TIMx->CH2CVR = TIM_OCInitStruct->TIM_Pulse;

???}?

可正常輸出PWM了。