stm32c8t6 TIM1_CH1 不能输出PWM的问题

valk · 发表于 2018-6-13 15:39:58

为什么同样的设置，通道4 PA11可以输出PWM，而通道1 PA8不行，下面是我的初始化代码：

void TIM1_Int_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); //时钟使能
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA| RCC_APB2Periph_AFIO, ENABLE);
// GPIO_PinRemapConfig(GPIO_PartialRemap_TIM1,ENABLE);

//定时器TIM1初始化
TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式

TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_11; //TIM_CH3
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse =500;//初始占空比为0
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM1, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM1 OC1  TIM_OCXInit  X代表是哪个通道
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);

TIM_OCInitStructure.TIM_Pulse =0;
TIM_OC4Init(TIM1, &TIM_OCInitStructure);
TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);

TIM_CtrlPWMOutputs(TIM1, ENABLE);
TIM_ARRPreloadConfig(TIM1, ENABLE);
TIM_Cmd(TIM1, ENABLE);  //使能TIMx

}