原创 3W LED手电筒驱动电路

电路功能：单锂3WLED恒流驱动，3.0V-4.2V全程恒流，最大可输出700mA(实际可达1000mA)；
          四种档位模式：1.三档调光+暴闪+慢闪+SOS+信标;
                        2.三档调光+暴闪+SOS;
                        3.二档调光;
                        4.六档调光+暴闪+慢闪+SOS+信标；
          有记忆功能；
          只有一个电源开关控制，关机关电源，完全不耗电；
          电池过放保护，电压低于3V进入应急模式自动切换到30mA,电压低于2.7V进入休眠模式。 


 (原文件名:3454.jpg) 
引用图片

有两种不同的代码，开机记忆或关机记忆
/*****************************************************
Chip type           : ATtiny13
Clock frequency     : 4.800000 MHz
Memory model        : Tiny
External SRAM size  : 0
Data Stack size     : 16
四组档位模式，关闭2秒记忆
*****************************************************/
//#define DEBUG2
//#define debug
#include <tiny13.h>
#include <delay.h>
#define CHANGE_WAITING  62
#define MAX_CURRENT  920
#define VOLTAGE_LIMIT_TO_30mA   5233  //5233=3.2V 4812=3.0V
#define VOLTAGE_OUT_OFF         4331  //4331=2.7V
#define VOLTAGE_CHANGE          1000  //定义开机后是否变换档位的电压值，如大于此值则变换档位，否则用上次关机时的档位
#define K1 318682                     //由于3454在压控恒流模式工作时输出电流会随电池电压降低而升高，为了做到真正的恒流，引入K1、K2根据电池电压对控制电压进行修正。
#define K2 341
#define XINGBIAO 3
#define MAX_DANGWEI  9 

#define ADEN ADCSRA.7
#define ADSC ADCSRA.6
#define EN_30mA PORTB.5
#define EN_PWM  PORTB.1
#define WDCE 4
#define WDE  3
eeprom unsigned char null;
eeprom unsigned char circle=2;
flash unsigned char time_set[3][18]=
                                      {
                                       {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},       // bao frash
                                       {16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16},        // flash
                                       {4,8,4,8,4,25,12,8,12,8,12,25,4,8,4,8,4,50}    // sos  亮（0.5秒）-〉暗（1秒）-〉亮（0.5秒）-〉暗（1秒）-〉亮（0.5秒）-〉暗（3.5秒）-〉亮（1.5秒）-〉暗（1秒）-〉亮（1.5秒）-〉暗（1秒）-〉亮（1.5秒）-〉暗（3.5秒）-〉亮（0.5秒）-〉暗（1秒）-〉亮（0.5秒）-〉暗（1秒）-〉亮（0.5秒）-〉暗（3.5秒）
                                      };    

flash unsigned int i_set[MAX_DANGWEI+1]=
                                   {
                                    920,
                                    700,
                                    700,
                                    50,     //xingbiao
                                    920,
                                    700,
                                    480,
                                    348,
                                    135,
                                    20
                                   };   
                                  

bit flashing_on_off;
bit adc_busy;
bit check_change_circle;
unsigned char temp;
unsigned char lower_times;
unsigned char time_flash,frash_count;

// Watchdog timeout interrupt service routine
interrupt [WDT] void wdt_timeout_isr(void)
{

if( temp!=XINGBIAO)
{
 time_flash++;
 WDTCR|=0x40;
 
 if( temp<3)
    {
     if(time_flash>time_set[temp][frash_count])
        {
         time_flash=0;
         frash_count++;
         if(frash_count>17)
           { 
            frash_count=0;
            flashing_on_off=1;
           }
         else
           flashing_on_off=~flashing_on_off; 
        
        }
    }
 }     
}
#ifndef DEBUG2
// ADC interrupt service routine
interrupt [ADC_INT] void adc_isr(void)
{
unsigned int  adc_result;
adc_result=10*ADCW;
if(check_change_circle==1)
  {
   check_change_circle=0;
   if(adc_result>VOLTAGE_CHANGE)
      {
       temp++;
       switch (PINB&0x18)
         {
          case 0x08:           //PB4 接地，三档调光+暴闪+慢闪+SOS+信标
               {
               if(temp>4)
                 temp++;
               }break;
          case 0x10:          //PB3 接地, 三档调光+暴闪+SOS
               {
                 temp++;
               }break; 
          case 0x00:          //PB3、PB4 接地,二档调光
               {
                temp=temp==5?7:4;
               }break;
          default: break;     //没有连接，六档调光+暴闪+慢闪+SOS+信标 
         } 
       
       if(temp>MAX_DANGWEI)
          temp=0;  
       circle=temp; 
      }   
  } 

 if(adc_result<VOLTAGE_OUT_OFF)
   {
    EN_PWM=0;
    #ifndef debug
    EN_30mA=0;
    #endif 
   }
 else
   {
    if(adc_result<VOLTAGE_LIMIT_TO_30mA)
       {
        lower_times++;
        if(lower_times>10)
           {
            TCCR0B=0x00;
            EN_PWM=0;
            #ifndef debug
            EN_30mA=flashing_on_off;
            #endif 
           } 
       }
    else
       {
        lower_times=0;
        EN_PWM=flashing_on_off;
        #ifndef debug
        EN_30mA=0; 
        #endif
        OCR0A=(unsigned char)((K1-(unsigned long)K2*i_set[temp])/(adc_result));
       }   
   }   
 
  adc_busy=0;
}
#endif
// Timer 0 output compare A interrupt service routine
interrupt [TIM0_COMPA] void timer0_compa_isr(void)
{

 if(adc_busy==0) 
    {
    ADSC=1;
    adc_busy=1;
    }
}

void main(void)
{

#pragma optsize-
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif

//PORTB=0x19;
//DDRB=0x23;



flashing_on_off=1;
lower_times=0;
time_flash=0;
frash_count=0;
#asm("sei")
temp=circle;

TIMSK0=0x04;
DIDR0=0x0F;
ADMUX=0x41;
ADCSRA=0x8D;

#pragma optsize-
WDTCR |= (1<<WDCE) | (1<<WDE);
WDTCR=0x41;   //64ms
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif 

OCR0A=200;
TCCR0A=0x83;
TCCR0B=0x01;
   
check_change_circle=1;
ADSC=1;
adc_busy=1;
while(check_change_circle==1)
     ; 
     
delay_ms(1);   
  
while (1)
    {
     if(temp==XINGBIAO)
      {
       EN_30mA=1;
       delay_ms(50);
       EN_30mA=0;
       #pragma optsize-
       WDTCR |= (1<<WDCE) | (1<<WDE);
       WDTCR=0x60;   //4s
       #ifdef _OPTIMIZE_SIZE_
       #pragma optsize+
       #endif
       MCUCR=0x20;
       #asm("sleep");
       #asm("NOP");
      }
     
    } 
}


/*****************************************************
Chip type           : ATtiny13
Clock frequency     : 4.800000 MHz
Memory model        : Tiny
External SRAM size  : 0
Data Stack size     : 16  
四组档位模式，两秒连续内按开关换档，点亮超过2秒记忆当前档，
*****************************************************/
//#define DEBUG2
//#define debug
#include <tiny13.h>
#include <delay.h>
#define CHANGE_WAITING  62
#define MAX_CURRENT  920
#define VOLTAGE_LIMIT_TO_30mA   5233  //5233=3.2V 4812=3.0V
#define VOLTAGE_OUT_OFF         4331  //4331=2.7V
#define K1 333167       //由于3454在压控恒流模式工作时输出电流会随电池电压降低而升高，为了做到真正的恒流，引入K1、K2根据电池电压对控制电压进行修正。
#define K2 292
#define XINGBIAO 3
#define MAX_DANGWEI  9 

#define ADEN ADCSRA.7
#define ADSC ADCSRA.6
#define EN_30mA PORTB.5
#define EN_PWM  PORTB.1
#define WDCE 4
#define WDE  3
eeprom unsigned char null;
eeprom unsigned char change_needed=0;
eeprom unsigned char circle=2;
flash unsigned char time_set[3][18]=
                                      {
                                       {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},       // bao frash
                                       {16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16},        // flash
                                       {4,8,4,8,4,25,12,8,12,8,12,25,4,8,4,8,4,50}    // sos  亮（0.5秒）-〉暗（1秒）-〉亮（0.5秒）-〉暗（1秒）-〉亮（0.5秒）-〉暗（3.5秒）-〉亮（1.5秒）-〉暗（1秒）-〉亮（1.5秒）-〉暗（1秒）-〉亮（1.5秒）-〉暗（3.5秒）-〉亮（0.5秒）-〉暗（1秒）-〉亮（0.5秒）-〉暗（1秒）-〉亮（0.5秒）-〉暗（3.5秒）
                                      };    

flash unsigned int i_set[MAX_DANGWEI+1]=
                                   {
                                    650,
                                    650,
                                    650,
                                    50,     //xingbiao
                                    1000,
                                    750,
                                    520,
                                    350,
                                    180,
                                    50
                                   };   
                                  

bit flashing_on_off;
bit adc_busy;
unsigned char temp;
unsigned char time,lower_times;
unsigned char time_flash,frash_count;

// Watchdog timeout interrupt service routine
interrupt [WDT] void wdt_timeout_isr(void)
{

if( temp!=XINGBIAO)
{
 time_flash++;
 WDTCR|=0x40;
 if(time<CHANGE_WAITING)
   time++;
 else
   {
    if(change_needed!=0)
       change_needed=0; 
   }    
 if( temp<3)
    {
     if(time_flash>time_set[temp][frash_count])
        {
         time_flash=0;
         frash_count++;
         if(frash_count>17)
           { 
            frash_count=0;
            flashing_on_off=1;
           }
         else
           {
            
            flashing_on_off=~flashing_on_off; 
            
           } 
        
        }
    }
 }     
}
#ifndef DEBUG2
// ADC interrupt service routine
interrupt [ADC_INT] void adc_isr(void)
{
unsigned int  adc_result;
adc_result=10*ADCW;

{
 if(adc_result<VOLTAGE_OUT_OFF)
   {
    EN_PWM=0;
    #ifndef debug
    EN_30mA=0;
    #endif 
   }
 else
   {
    if(adc_result<VOLTAGE_LIMIT_TO_30mA)
       {
        lower_times++;
        if(lower_times>10)
           {
            TCCR0B=0x00;
            EN_PWM=0;
            #ifndef debug
            EN_30mA=flashing_on_off;
            #endif 
           } 
       }
    else
       {
        lower_times=0;
        EN_PWM=flashing_on_off;
        #ifndef debug
        EN_30mA=0; 
        #endif 
        if(flashing_on_off==0)
            {
            OCR0A=200;
            }
        else
            {
            OCR0A=(unsigned char)((K1-(unsigned long)K2*i_set[temp])/(adc_result));
            }   
        
       }   
   }   
 }
  adc_busy=0;
}
#endif
// Timer 0 output compare A interrupt service routine
interrupt [TIM0_COMPA] void timer0_compa_isr(void)
{

 if(adc_busy==0) 
    {
    ADSC=1;
    adc_busy=1;
    }
}

void main(void)
{

#pragma optsize-
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif

//PORTB=0x19;
//DDRB=0x23;

TCCR0A=0x83;

flashing_on_off=1;
time=0;
lower_times=0;
time_flash=0;
frash_count=0;

#asm("sei") 
temp=circle;

if(change_needed==0)
   {
    change_needed=1;
   }
else
   {
    temp++;
    switch (PINB&0x18)
       {
         case 0x08:           //PB4 接地，三档调光+暴闪+慢闪+SOS+信标
               {
               if(temp>4)
                 temp++;
               }break;
         case 0x10:          //PB3 接地, 三档调光+暴闪+SOS
               {
                 temp++;
               }break; 
         case 0x00:          //PB3、PB4 接地,二档调光
               {
                temp=temp==5?7:4;
               }break;
         default: break;     //没有连接，六档调光+暴闪+慢闪+SOS+信标 
               
                                
       } 
   
    if(temp>MAX_DANGWEI)
        temp=0;  
    circle=temp; 
   } 

   
if(temp!=XINGBIAO)
      {
      //GIMSK=0x20;
      //PCMSK=0x10;
      //GIFR=0x20;

      TIMSK0=0x04;
      
      DIDR0=0x0F;
      ADMUX=0x41;
      ADCSRA=0x8D;
      #pragma optsize-
      WDTCR |= (1<<WDCE) | (1<<WDE);
      WDTCR=0x41;   //64ms
      #ifdef _OPTIMIZE_SIZE_
      #pragma optsize+
      #endif
      OCR0A=250;
      TCCR0B=0x01;
      delay_ms(5); 
      adc_busy=0;
      }
  
while (1)
    {
     if(temp==XINGBIAO)
      {
       EN_30mA=1;
       delay_ms(100);
       EN_30mA=0;
       #pragma optsize-
       WDTCR |= (1<<WDCE) | (1<<WDE);
       WDTCR=0x60;   //4s
       #ifdef _OPTIMIZE_SIZE_
       #pragma optsize+
       #endif
       MCUCR=0x20;
       #asm("sleep");
       #asm("NOP");
      }
     
    } 
}

程序中系数K1、K2计算：


 (原文件名:1.jpg) 
引用图片