基于stm32和红外测速控制直流电机转速200到3000的stm32程序

以下是一个基于STM32和红外测速的直流电机转速控制程序的示例：

#include "stm32f10x.h"

#define IR_PIN GPIO_Pin_0 //红外传感器输入引脚
#define IR_PORT GPIOA //红外传感器输入端口
#define MOTOR_PIN GPIO_Pin_1 //电机控制输出引脚
#define MOTOR_PORT GPIOB //电机控制输出端口

volatile uint16_t count = 0; //计数器
volatile uint16_t rpm = 0; //转速(rpm)

void TIM2_IRQHandler(void)
{
    if (TIM_GetITStatus(TIM2, TIM_IT_Update) == SET) //定时器更新中断
    {
        count++; //计数器加1
        TIM_ClearITPendingBit(TIM2, TIM_IT_Update); //清除中断标志位
    }
}

int main(void)
{
    //初始化红外传感器输入引脚
    GPIO_InitTypeDef GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIOA时钟
    GPIO_InitStructure.GPIO_Pin = IR_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //设置为上拉输入
    GPIO_Init(IR_PORT, &GPIO_InitStructure);

    //初始化电机控制输出引脚
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //使能GPIOB时钟
    GPIO_InitStructure.GPIO_Pin = MOTOR_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //设置为推挽输出
    GPIO_Init(MOTOR_PORT, &GPIO_InitStructure);

    //初始化定时器2
    TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
    uint16_t PrescalerValue = 71; //预分频器值，定时器时钟为72MHz/72=1MHz
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //使能TIM2时钟
    TIM_TimeBaseInitStruct.TIM_Period = 999; //计数器自动重装值
    TIM_TimeBaseInitStruct.TIM_Prescaler = PrescalerValue; //预分频器
    TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1; //时钟分频
    TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
    TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0x0000; //重复计数器值
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStruct);
    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE); //使能更新中断
    TIM_Cmd(TIM2, ENABLE); //使能定时器2

    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; //定时器2中断
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级0
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //子优先级1
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    while (1)
    {
        if (count > 0) //计数器不为0
        {
            rpm = 60000000 / (count * 2); //计算转速
            count = 0; //计数器清零
        }

        if (rpm > 200 && rpm < 3000) //转速在200~3000rpm之间
        {
            GPIO_SetBits(MOTOR_PORT, MOTOR_PIN); //控制电机转动
        }
        else
        {
            GPIO_ResetBits(MOTOR_PORT, MOTOR_PIN); //控制电机停止
        }
    }
}

该程序通过红外传感器输入引脚读取电机转子的转速信号，使用定时器2计数器进行计数，然后根据计数器的值计算转速。当转速在200~3000rpm之间时，控制电机转动；否则，控制电机停止。该程序可以根据实际需求进行修改和优化。