通过TIM输出四路PWM控制两个步进电机的问题

xiaoa · 发表于 2021-4-24 11:08:07

为啥我的步进电机没啥反应，下面是我写的初始化函数
GPIO_InitTypeDef GpioAInit; TIM_TimeBaseInitTypeDef Tim1Init;
TIM_OCInitTypeDef Tim1Ch1Init;
TIM_OCInitTypeDef Tim1Ch2Init;
TIM_OCInitTypeDef Tim1Ch3Init;
TIM_OCInitTypeDef Tim1Ch4Init;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_TIM1,ENABLE);//使能相应时钟

GpioAInit.GPIO_Mode=GPIO_Mode_AF_PP;//复用推挽输出
GpioAInit.GPIO_Pin=GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11;
GpioAInit.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GpioAInit);

Tim1Init.TIM_ClockDivision=0;
Tim1Init.TIM_CounterMode=TIM_CounterMode_Up;//向上计数
Tim1Init.TIM_Period=arr;//计数周期
Tim1Init.TIM_Prescaler=psc;//分频因子
TIM_TimeBaseInit(TIM1,&Tim1Init);

Tim1Ch1Init.TIM_OCMode=TIM_OCMode_PWM2;//PWM2模式（计数值大于比较值为有效电平）
Tim1Ch1Init.TIM_OCIdleState=TIM_OutputState_Enable;//输出比较使能
Tim1Ch1Init.TIM_OCPolarity=TIM_OCPolarity_High;//高电平有效
Tim1Ch1Init.TIM_Pulse=0;//设置比较值
TIM_OC1Init(TIM1,&Tim1Ch1Init);//IN1

Tim1Ch2Init.TIM_OCMode=TIM_OCMode_PWM2;
Tim1Ch2Init.TIM_OCIdleState=TIM_OutputState_Enable;
Tim1Ch2Init.TIM_OCPolarity=TIM_OCPolarity_High;
Tim1Ch2Init.TIM_Pulse=0;
TIM_OC2Init(TIM1,&Tim1Ch2Init);//IN2

Tim1Ch3Init.TIM_OCMode=TIM_OCMode_PWM2;
Tim1Ch3Init.TIM_OCIdleState=TIM_OutputState_Enable;
Tim1Ch3Init.TIM_OCPolarity=TIM_OCPolarity_High;
Tim1Ch3Init.TIM_Pulse=0;
TIM_OC3Init(TIM1,&Tim1Ch3Init);//IN3

Tim1Ch4Init.TIM_OCMode=TIM_OCMode_PWM2;
Tim1Ch4Init.TIM_OCIdleState=TIM_OutputState_Enable;
Tim1Ch4Init.TIM_OCPolarity=TIM_OCPolarity_High;
Tim1Ch4Init.TIM_Pulse=0;
TIM_OC4Init(TIM1,&Tim1Ch4Init); //IN4

TIM_CtrlPWMOutputs(TIM1,ENABLE);

TIM_ARRPreloadConfig(TIM1,ENABLE);

TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);

TIM_OC2PreloadConfig(TIM1,TIM_OCPreload_Enable);

TIM_OC3PreloadConfig(TIM1,TIM_OCPreload_Enable);

TIM_OC4PreloadConfig(TIM1,TIM_OCPreload_Enable);

TIM_Cmd(TIM1,ENABLE);