基于STM8的PWM風(fēng)扇控制程序分享

炎炎夏日沒有空調(diào)怎么辦

找來了兩個(gè)電腦DC12V的CPU散熱器風(fēng)扇。風(fēng)扇一共四根線，紅色：電源+、黑色：電源-、黃色：轉(zhuǎn)速信號(hào)線、藍(lán)色：PWM信號(hào)線。

后面又找了紅外遙控、數(shù)碼管、STM8最小板、紅外熱釋電傳感器。準(zhǔn)備做一個(gè)簡易的遙控風(fēng)扇（讓這個(gè)夏天清涼一下）。

單片機(jī)模塊用的1117-3.3V穩(wěn)壓器，而風(fēng)扇需要使用12V供電，傳感器模塊需要使用5V供電，所以第一步就是在單片機(jī)模塊輸入端加一個(gè)78M05，產(chǎn)生一個(gè)5V直流給外設(shè)模塊供電。

然后再把紅外信號(hào)接收管焊接上。

再然后就是數(shù)碼管模塊和紅外熱釋電傳感器（中間忘記拍照了就不貼圖了）。最后的最后給它弄個(gè)外殼。

效果就是上面圖的樣子。

然后就是程序部分，風(fēng)扇速度就不檢測了，但是調(diào)速還是要弄的。調(diào)速的原理就是發(fā)PWM波，通過改變PWM波的占空比來實(shí)現(xiàn)調(diào)速。這里就利用STM8的定時(shí)器PWM功能產(chǎn)生兩個(gè)頻率為25KHz的方波。然后檢測IO和定時(shí)器完成紅外遙控信號(hào)的接收及解碼。紅外解碼原理都爛大街了，這里就不解釋了。紅外解碼程序也是用的網(wǎng)絡(luò)大神的。然后就是紅外熱釋電傳感器的檢測，就是普通IO信號(hào)的檢測，也沒什么好多說的。

下面貼的是主程序部分。

/**
  ******************************************************************************
  * @file    Project/main.c 
  * @author  MCD Application Team
  * @version V2.1.0
  * @date    18-November-2011
  * @brief   Main program body
  ******************************************************************************
  * @attention
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * 
? COPYRIGHT 2011 STMicroelectronics
  ******************************************************************************
  */ 




/* Includes ------------------------------------------------------------------*/


#include "stm8s.h"
#include "TM1637.h"
#include "math.h"


/* Private defines -----------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
//#define LED_GPIO_PORT  (GPIOB)
//#define LED_GPIO_PINS  (GPIO_PIN_5)


//紅外解碼IO
#define IR_IN GPIOA->IDR & (GPIO_PIN_2)
//紅外熱釋電
#define PIR_IN GPIOD->IDR & (GPIO_PIN_2)


uint16_t sleep_cnt = 0 ;
uint16_t i=0;
uint8_t sample_flag = 0 ;
uint8_t sample_cnt = 0 ;
#define CCR1_Val  ((uint16_t)800)




//
uint8_t fan1_speed = 0 ;
uint8_t fan2_speed = 0 ;
//
uint8_t fan1_state = 0 ;
uint8_t fan2_state = 0 ;


uint8_t display_buff[5] = {0,0,0,0,0};


uint8_t enable_display = 0 ;




uint8_t fan1_buff = 0xff ;
uint8_t fan2_buff = 0xff ;




uint8_t mode = 0 ;


uint16_t PIR_Delay = 0 ;
uint8_t  PIR_REG = 0 ;
uint8_t  PIR_OFF = 0 ;




//**********************紅外解碼部分變量
uint16_t LongKeyCount ;
uint8_t IrData[20];
uint8_t IrOkFlag ;
uint8_t IrTime ;
uint16_t Time1msCount ;
uint16_t DelayTime ;
//****************************************************************************//
/* Private defines -----------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/


//IO初始化
void Init_GPIO(void)
{
  GPIO_Init(GPIOB, GPIO_PIN_5, GPIO_MODE_OUT_PP_LOW_FAST);
        GPIO_Init(GPIOA, GPIO_PIN_2, GPIO_MODE_IN_PU_NO_IT);
        GPIO_Init(GPIOD, GPIO_PIN_4, GPIO_MODE_OUT_PP_HIGH_FAST);
        GPIO_Init(GPIOD, GPIO_PIN_3, GPIO_MODE_OUT_PP_HIGH_FAST);    
        GPIO_Init(GPIOD, GPIO_PIN_2, GPIO_MODE_IN_PU_NO_IT);
}
//定時(shí)器4初始化
void Init_Timer4(void)
{
  /*TIM4_UpdateDisableConfig(ENABLE);//允許更新事件
  TIM4_ARRPreloadConfig(ENABLE);//自動(dòng)重裝
  TIM4_ITConfig(TIM4_IT_UPDATE, ENABLE);//中斷配置，更新中斷
  TIM4_SetCounter(0xff);//計(jì)數(shù)器初值
  TIM4_SetAutoreload(0xFF);//計(jì)數(shù)器自動(dòng)重裝的初值
  TIM4_PrescalerConfig(TIM4_PRESCALER_128, TIM4_PSCRELOADMODE_UPDATE);//預(yù)分頻值
  */
  TIM4_TimeBaseInit(TIM4_PRESCALER_16, 0x32);                             //定時(shí)器4，50us中斷定時(shí)
        /* Clear TIM4 update flag */
        TIM4_ClearFlag(TIM4_FLAG_UPDATE);
   /* Enable update interrupt */
  TIM4_ITConfig(TIM4_IT_UPDATE, ENABLE);
  TIM4_Cmd(ENABLE);
}


/***************************************
*               TIMER2初始化
*           檢測外部頻率和脈沖
***************************************/
void timer2_init(void)
{


  TIM2_DeInit();  
  TIM2_TimeBaseInit(TIM2_PRESCALER_16, 40-1);
  TIM2_OC1Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE, 0, TIM2_OCPOLARITY_HIGH);
  TIM2_OC2Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE, 0, TIM2_OCPOLARITY_HIGH);
  /* TIM1 counter enable */
  TIM2_Cmd(ENABLE);
  
}
uint8_t get_value(uint8_t spd)
{
  uint8_t buf ;
  switch(spd)
  {
    case 0 : buf = 0 ; break ;
    case 1 : buf = 20 ;break ;
    case 2 : buf = 22 ;break ;
    case 3 : buf = 24 ;break ;
    case 4 : buf = 28 ;break ;
    case 5 : buf = 30 ;break ;
    case 6 : buf = 32 ;break ;
    case 7 : buf = 34 ;break ;
    case 8 : buf = 36 ;break ;
    case 9 : buf = 39 ;break ;
    default : buf = 0 ;
  }
  return buf ;
  
}
//設(shè)置兩個(gè)風(fēng)扇速度
void set_speed(uint8_t spd1,uint8_t spd2)
{
  uint8_t pwm_dat1,pwm_dat2;
  pwm_dat1 = get_value(spd1);
  pwm_dat2 = get_value(spd2);
  TIM2_SetCompare1(pwm_dat1);
  TIM2_SetCompare2(pwm_dat2);
}


void fan_run(void)
{
  
  
  display_buff[0] = (fan1_buff>>7)&0x01|((fan1_buff>>1)&0x38);
  display_buff[1] = 0x0f&fan1_buff ;
  
  display_buff[2] = (fan2_buff>>7)&0x01|((fan2_buff>>1)&0x38);
  display_buff[3] = 0x0f&fan2_buff ;
}
//遙控按鍵處理函數(shù)
void key_handling(uint8_t key_value)
{
  switch(key_value)
  {
    case 0x43 : enable_display = 1 ; break ;
    case 0x09 : enable_display = 0 ; break ;
    case 0x44 : fan1_state = 1 ; fan1_speed=9;set_speed(fan1_speed,fan2_speed);break ;
    case 0x40 : fan2_state = 1 ; fan2_speed=9;set_speed(fan1_speed,fan2_speed);break ;
    case 0x07 : fan1_state = 0 ; fan1_speed=0;set_speed(fan1_speed,fan2_speed);PIR_OFF = 0 ;break ;
    case 0x15 : fan2_state = 0 ; fan2_speed=0;set_speed(fan1_speed,fan2_speed);PIR_OFF = 0 ;break ;
    case 0x46 : mode = 0 ; break ;
    case 0x45 : if(fan1_state==1)mode = 1 ; break ;
    case 0x47 : if(fan2_state==1)mode = 2 ; break ;
    case 0x19 : fan1_state = 1 ; fan1_speed=9;fan2_state = 1 ; fan2_speed=9;set_speed(fan1_speed,fan2_speed);break ;
    case 0x0d : fan1_state = 0 ; fan1_speed=0;fan2_state = 0 ; fan2_speed=0;set_speed(fan1_speed,fan2_speed);break ;
    
    case 0x16 : if(mode==1) fan1_speed = 0 ; else if(mode==2) fan2_speed = 0 ;set_speed(fan1_speed,fan2_speed); break ;
    case 0x0c : if(mode==1) fan1_speed = 1 ; else if(mode==2) fan2_speed = 1 ;set_speed(fan1_speed,fan2_speed); break ;
    case 0x18 : if(mode==1) fan1_speed = 2 ; else if(mode==2) fan2_speed = 2 ;set_speed(fan1_speed,fan2_speed); break ;
    case 0x5e : if(mode==1) fan1_speed = 3 ; else if(mode==2) fan2_speed = 3 ;set_speed(fan1_speed,fan2_speed); break ;
    case 0x08 : if(mode==1) fan1_speed = 4 ; else if(mode==2) fan2_speed = 4 ;set_speed(fan1_speed,fan2_speed); break ;
    case 0x1c : if(mode==1) fan1_speed = 5 ; else if(mode==2) fan2_speed = 5 ;set_speed(fan1_speed,fan2_speed); break ;
    case 0x5a : if(mode==1) fan1_speed = 6 ; else if(mode==2) fan2_speed = 6 ;set_speed(fan1_speed,fan2_speed); break ;
    case 0x42 : if(mode==1) fan1_speed = 7 ; else if(mode==2) fan2_speed = 7 ;set_speed(fan1_speed,fan2_speed); break ;
    case 0x52 : if(mode==1) fan1_speed = 8 ; else if(mode==2) fan2_speed = 8 ;set_speed(fan1_speed,fan2_speed); break ;
    case 0x4a : if(mode==1) fan1_speed = 9 ; else if(mode==2) fan2_speed = 9 ;set_speed(fan1_speed,fan2_speed); break ;
    default: ;
  }
  
}






//紅外解碼處理函數(shù)，在定時(shí)器4中斷中調(diào)用，移植自網(wǎng)絡(luò)
void Time4InitFun (void)
{
    static unsigned char TimeL,TimeH;
    static unsigned char IoState,UpState;
    static unsigned char RxData[4];
    static unsigned char BitCount,ByteCount;
    static unsigned char Task;
    unsigned char i;
    //TIM4_SR=0;  //清標(biāo)志
    IoState =IR_IN;
    if(IoState){
        if(TimeH<250)TimeH++;
    }
    else{
        if(TimeL<250)TimeL++;
    }
    if((!IoState)&&(UpState)){
        if(Task==0){            //收同步頭
            if((TimeL<=(180+30))&&(TimeL>=(180-30))&&(TimeH<=(87+10))&&(TimeH>=(43-10))){
                BitCount=0;
                ByteCount=0;
                if(LongKeyCount)LongKeyCount=3;
                Task++;
            }
        }
        else if(Task==1){       //收數(shù)據(jù)
            if((TimeL<=(12+5))&&(TimeL>=(12-5))){
                if((TimeH<=(12+5))&&(TimeH>=(12-5)))         RxData[ByteCount] &= ~(1<=(32-8)))    RxData[ByteCount] |= (1<=8){
                    BitCount=0;
                    ByteCount++;
                    if(ByteCount>=4){
                        ByteCount=0;
                        for(i=0;i<4;i++){
                            IrData[i]=RxData[i];
                            IrOkFlag=1;
                            Task=0;
                            IrTime=5;
                            LongKeyCount=3; //長鍵采樣
                        }
                    }
                }
            }
            else{
                Task=0;
            }
        }
        else{
            Task=0;
        }


        TimeH=0;
        TimeL=0;
    }
    UpState=IoState;
    if(Time1msCount<250)Time1msCount++;
    if(DelayTime)DelayTime--;
    return;
}
//主函數(shù)
void main(void)
{
   // ErrorStatus clk_return_status;
    //FlagStatus flag_status;
    u16 display_cnt = 0 ;
    uint8_t cnt = 0 ;
    /*  Configuration  -----------------------------------------*/
    CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);              //不分頻
    CLK_HSICmd(ENABLE);                                         //開始內(nèi)部高頻RC
    Init_Timer4();
    enableInterrupts();
    GPIO_init();
    TM1637_OFF();
    timer2_init();
    set_speed(fan1_speed,fan2_speed);
    sleep_cnt = 0 ;
    mode = 0 ;
    while (1)
    {
      
       if(PIR_IN)
       {
           display_buff[1] = display_buff[1]|0x80;
           PIR_REG = 1 ;
           if(PIR_OFF)
           {
              PIR_OFF = 0 ;
              fan1_speed=9;
              fan2_speed=9;
              fan1_state = 1 ;
              fan2_state = 1 ;
              set_speed(fan1_speed,fan2_speed);
           }
              
        }else
        {
           display_buff[1] = display_buff[1]&0x7f;
           PIR_REG = 0 ;
             
        }
          
        //**********************************************************************
        if(sample_flag==1)                      //20毫秒執(zhí)行一次
        {
          sample_flag = 0 ;
          display_cnt++;
          
        }
        //**********************************************************************
        
        if(IrOkFlag==1)
        {
          IrOkFlag = 0 ;
          key_handling(IrData[2]);
        }
        //**********************************************************************
        if(display_cnt>10)
        {
          display_cnt=0;
          
          if((fan1_state==1||fan2_state==1))
          {
            if(PIR_REG==0)
            {
               PIR_Delay++;
            }   
            if(PIR_Delay>=1000)
            {
              fan1_state = 0 ;
              fan2_state = 0 ;
              fan1_speed=0;
              fan2_speed=0;
              set_speed(fan1_speed,fan2_speed);
              PIR_OFF = 1 ;
            }
          }else
          {
            PIR_Delay = 0 ;
          }
          
          if(enable_display)
          {
            
            TM1637_DHex(display_buff);
          }else 
          {
            TM1637_OFF();
          }
          cnt ++ ;
          if(cnt>=8)
          {
              cnt =0 ;
          }
          if(mode==0)
          {
            if(fan1_state)
            {
              
              fan1_buff = 0xff & (~(0x01<
審核編輯：湯梓紅