STM32 刹车 代码

以下是一个基本的STM32刹车代码，用于控制电机的速度和停止：

#include "stm32f10x.h"

#define MOTOR_GPIO_RCC     RCC_APB2Periph_GPIOA
#define MOTOR_GPIO_PORT    GPIOA
#define MOTOR_GPIO_PIN     GPIO_Pin_6

#define PWM_GPIO_RCC       RCC_APB2Periph_GPIOB
#define PWM_GPIO_PORT      GPIOB
#define PWM_GPIO_PIN       GPIO_Pin_0

#define PWM_TIM_RCC        RCC_APB1Periph_TIM3
#define PWM_TIM            TIM3
#define PWM_PRESCALER      71
#define PWM_PERIOD         15999

#define STOP_SPEED         0

void GPIO_Config(void);
void TIM_Config(void);
void Set_Speed(uint16_t speed);

int main(void)
{
  GPIO_Config();
  TIM_Config();
  
  Set_Speed(STOP_SPEED);
  
  while(1) {}
}

void GPIO_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB2PeriphClockCmd(MOTOR_GPIO_RCC | PWM_GPIO_RCC, ENABLE);

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Pin = PWM_GPIO_PIN;
  GPIO_Init(PWM_GPIO_PORT, &GPIO_InitStructure);
  
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Pin = MOTOR_GPIO_PIN;
  GPIO_Init(MOTOR_GPIO_PORT, &GPIO_InitStructure);
}

void TIM_Config(void)
{
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;

  RCC_APB1PeriphClockCmd(PWM_TIM_RCC, ENABLE);

  TIM_TimeBaseStructure.TIM_Prescaler = PWM_PRESCALER;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseStructure.TIM_Period = PWM_PERIOD;
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;

  TIM_TimeBaseInit(PWM_TIM, &TIM_TimeBaseStructure);

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = STOP_SPEED;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

  TIM_OC1Init(PWM_TIM, &TIM_OCInitStructure);
  TIM_OC1PreloadConfig(PWM_TIM, TIM_OCPreload_Enable);

  TIM_ARRPreloadConfig(PWM_TIM, ENABLE);
  TIM_Cmd(PWM_TIM, ENABLE);
}

void Set_Speed(uint16_t speed)
{
  TIM_OCInitTypeDef TIM_OCInitStructure;

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = speed;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

  TIM_OC1Init(PWM_TIM, &TIM_OCInitStructure);
  TIM_OC1PreloadConfig(PWM_TIM, TIM_OCPreload_Enable);

  TIM_ARRPreloadConfig(PWM_TIM, ENABLE);
  TIM_Cmd(PWM_TIM, ENABLE);

  if (speed == STOP_SPEED)
    GPIO_ResetBits(MOTOR_GPIO_PORT, MOTOR_GPIO_PIN);
  else
    GPIO_SetBits(MOTOR_GPIO_PORT, MOTOR_GPIO_PIN);
}

该代码使用了STM32在PWM模式下的输出，以控制电机的速度。其中，GPIO_Config()函数用于配置PWM输出引脚和电机驱动引脚，TIM_Config()函数用于配置PWM模式的定时器，Set_Speed()函数用于设置电机的速度，包括启动和停止状态。在该代码中，电机的速度是通过调整PWM脉冲宽度来实现的。当电机速度为0时，电机将被停止。