TIM4的PD12,PD13,PD14输出不了PWM

只看该作者 · 2018-6-30 19:06

#include &quot;bsp_pwm_output.h&quot;
/*
1号舵机 PD12
2号舵机 PD13
3号舵机 PD14
*/
static void TIM4_GPIO_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

      /* 设置TIM3CLK 为 72MHZ */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_12 | GPIO_Pin_13| GPIO_Pin_14;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOD, &GPIO_InitStructure);
}
static void TIM4_Mode_Config(void)
{
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

  TIM_TimeBaseStructure.TIM_Period = 19999;
  TIM_TimeBaseStructure.TIM_Prescaler = 71;          //设置预分频：不预分频，即为72MHz
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ;       //设置时钟分频系数：不分频(这里用不到)
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //向上计数模式
  TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
}
void Steering_1(int a)
{
TIM_OCInitTypeDef  TIM_OCInitStructure;
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;          //配置为PWM模式1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = a;          //设置跳变值，当计数器计数到这个值时，电平发生跳变
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;  //当定时器计数值小于CCR1_Val时为高电平
TIM_OC1Init(TIM4, &TIM_OCInitStructure);       //使能通道1
TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);
TIM_Cmd(TIM4, ENABLE);
}
void Steering_2(int b)
{
  TIM_OCInitTypeDef  TIM_OCInitStructure;
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse =b;       //设置通道2的电平跳变值，输出另外一个占空比的PWM
  TIM_OC2Init(TIM4, &TIM_OCInitStructure);       //使能通道2
  TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);
  TIM_Cmd(TIM4, ENABLE);
}
void Steering_3(int c)
{
  TIM_OCInitTypeDef  TIM_OCInitStructure;
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse =c;       //设置通道3的电平跳变值，输出另外一个占空比的PWM
  TIM_OC3Init(TIM4, &TIM_OCInitStructure);       //使能通道3
  TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable);
  TIM_Cmd(TIM4, ENABLE);
}
void TIM4_PWM_Init(void)
{
TIM4_GPIO_Config();
TIM4_Mode_Config();
}

TIM4的PD12,PD13,PD14输出不了PWM

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