F4输不出互补PWM波，求助

怦然心动RT · 发表于 2017-7-13 16:45:58

void TIM1_PWM_Init(u32 arr,u32 psc)
{
//此部分需手动修改IO口设置

GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);

//
// RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14,ENABLE);

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

GPIO_PinAFConfig(GPIOA,GPIO_PinSource8,GPIO_AF_TIM1);

GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_TIM1);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_PinSource7;          //GPIOF9
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;       //复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //速度100MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;    //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;       //上拉
GPIO_Init(GPIOA,&GPIO_InitStructure);             //初始化PF9

TIM_TimeBaseStructure.TIM_Prescaler=psc;  //定时器分频
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseStructure.TIM_Period=arr; //自动重装载值
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;

TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);//初始化定时器1

//初始化TIM14 Channel1 PWM模式
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM1脉冲宽度调制模式2

TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCNIdleState_Reset;

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable;

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性低
TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_High;

TIM_OC1Init(TIM1, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM1 4OC1

TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);  //使能TIM1在CCR1上的预装载寄存器

  TIM_ARRPreloadConfig(TIM1,ENABLE);//ARPE使能

TIM_Cmd(TIM1, ENABLE);  //使能TIM1

  TIM_CtrlPWMOutputs(TIM1,ENABLE); //MOE 主输出使能

}