现开发了单片机控制5路PWM波形，也可以同时控制15路直流三色灯板，按触摸屏顺序点亮的电路和程序，供大家参考。

电路为

单片机ATMEGA128控制5路PWM方波，按照74HC08逻辑编码输出15路PWM信号，一次按照迪文触摸屏点亮3种颜色灯板的5路发光信号。ULN2003提供12V电压。每个灯板通过一个CMOS管IR3205输出功率。一个74HC08通过一路PWM，这路PWM通过74HC08控制的继电器控制IR3205的开关，进而控制24V，13V,36V灯板的开关，灯板的亮度通过PWM波形的占空比调节电路的PCB如下

上面是单片机PCB，它和灯板PCB通过排线连接

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上面是灯板PCB。下面是单片机程序，程序用ICC-AVR开发，链接：https://pan.baidu.com/s/1X_7zIHR4K1ipaGRTviVtUw ;

提取码：so7m

复制这段内容后打开百度网盘手机App，操作更方便哦

//ICC-AVR application builder : 2010-6-22 15:14:03

// Target : M64A

// Crystal: 4.0000Mhz

#include "main.h"

void TxUart1(unsigned char i)

{

//CLI(); //disable all interrupts

//DelayMs(1);

while (!(UCSR0A & (1<<UDRE0)));

UDR0 = i;                                        

    //SEI(); //re-enable interrupts

}

void TxArrayUart1(unsigned char *ptr,unsigned char number)

{

//CLI(); //disable all interrupts

uchar i;

for(i = 0; i < number; i++)

{

TxUart1(ptr[i]);

}

    //SEI(); //re-enable interrupts

}

unsigned char uart_receive1(void)

{

while (!(UCSR1A & (1<<RXC1)));

return UDR1;

}

//UART0 initialize

// desired baud rate: 9600

// actual: baud rate: 9615 (0.2%)

// char size: 8 bit

// parity: Disabled

void uart0_init(void)

{

UCSR0B = 0x00; //disable while setting baud rate

UCSR0A = 0x00;

UCSR0C = 0x06;

UBRR0L = 0x0C; //set baud rate lo

UBRR0H = 0x00; //set baud rate hi

UCSR0B = 0x98;

}

#pragma interrupt_handler uart0_rx_isr:iv_USART0_RXC

void uart0_rx_isr(void)

{

//uart has received a character in UDR

uart1_data = UDR0;

switch (uart1_counter)

{

  case 0:

   if (uart1_data == 0xaa)

   uart1_counter ++;

   else

   uart1_counter = 0;

   break;

  case 1:

   if ((uart1_data == 0x78) || (uart1_data == 0x79))

     uart1_counter ++;

   else

     uart1_counter = 0;

button_type = uart1_data;

  break;

  case 2:

   if (uart1_data == 0x00)

   {

     uart1_counter ++;

   }

   else

   uart1_counter = 0;

   break;

  case 3:

       uart1_counter ++;

   button = uart1_data;

   break;

  case 4:

   if (uart1_data == 0xcc)

   uart1_counter ++;

   else

   uart1_counter = 0;

   break;

  case 5:

   if (uart1_data == 0x33)

   uart1_counter ++;

   else

   uart1_counter = 0;

   break;

  case 6:

   if (uart1_data == 0xc3)

   uart1_counter ++;

   else

   uart1_counter = 0;

   break;

  case 7:

   uart1_counter = 0;

   if (uart1_data == 0x3c)

   {

     switch(button)

{

   case 0x57:

   case 0x58:

   case 0x63:

       if(button_time == 0)

       {

    button_flag = 1;

button_time = 110;

   }

   break;

   default:

   if((button_time == 0) && (button_type == 0x78))

       {

    button_flag = 1;

   }

   break;

}

   }

   break;

  default:

  uart1_counter = 0;

  break;

}

}

//UART1 initialize

// desired baud rate:19200

// actual baud rate:19231 (0.2%)

// char size: 8 bit

// parity: Disabled

void uart1_init(void)

{

UCSR1B = 0x00; //disable while setting baud rate

UCSR1A = 0x00;

UCSR1C = 0x06;

UBRR1L = 0x0C; //set baud rate lo

UBRR1H = 0x00; //set baud rate hi

UCSR1B = 0x98;

}

//TIMER0 initialize - prescale:32

// WGM: Normal

// desired value: 1KHz

// actual value:  1.000KHz (0.0%)

void timer0_init(void)

{

TCCR0 = 0x00; //stop

ASSR  = 0x00; //set async mode

TCNT0 = 0x83; //set count

OCR0  = 0x7D;

// TCCR0 = 0x03; //start timer

}

#pragma interrupt_handler timer0_ovf_isr:iv_TIM0_OVF

void timer0_ovf_isr(void)

{

TCNT0 = 0x83; //reload counter value

if(ms)

ms--;

}

//TIMER1 initialize - prescale:64

// WGM: 0) Normal, TOP=0xFFFF

// desired value: 1KHz

// actual value:  1.008KHz (0.8%)

void timer1_init(void)

{

TCCR1B = 0x00; //stop

TCNT1H = 0xFF; //setup

TCNT1L = 0xC2;

OCR1AH = 0x00;

OCR1AL = 0x3E;

OCR1BH = 0x00;

OCR1BL = 0x3E;

OCR1CH = 0x00;

OCR1CL = 0x3E;

ICR1H  = 0x00;

ICR1L  = 0x3E;

TCCR1A = 0x00;

TCCR1B = 0x03; //start Timer

}

#pragma interrupt_handler timer1_ovf_isr:iv_TIM1_OVF

void timer1_ovf_isr(void)

{

   //TIMER1 has overflowed

   TCNT1H = 0xFF; //reload counter high value

   TCNT1L = 0xC2; //reload counter low value

   if(laser_ms)

   laser_ms --;

   if(button_time)

   button_time --;

   if(rf_out_time)

   {

      rf_out_time --;

      if(RF_TYPE)

      RFRUN_L;

      else

      RFCTL_L;

   }

   else

   {

      //if(RF_TYPE)

      RFRUN_H;

      //else

      RFCTL_H;

   }

   cold_count = (cold_count < 3) ? (cold_count + 1) : 0;

   if(cold_count < cold_max)

   COLD_L;

   else

   COLD_H;

}

//TIMER2 initialize - prescale:1024

// WGM: Normal

// desired value: 20Hz

// actual value: 20.032Hz (0.2%)

void timer2_init(void)

{

TCCR2 = 0x00; //stop

TCNT2 = 0x3D; //setup

OCR2  = 0xC3;

TCCR2 = 0x05; //start

}

#pragma interrupt_handler timer2_ovf_isr:iv_TIM2_OVF

void timer2_ovf_isr(void)

{

TCNT2 = 0x3D; //reload counter value

WDR ();

if(ad_time < 20)

{

   ad_time++;

}

else

{

   ad_time = 0;

   if(miniter == 60)

   {

      miniter = 0;

  total_time ++;

  EEPROM_write(0x110,total_time>>16);

  EEPROM_write(0x111,(unsigned char)total_time>>8);

  EEPROM_write(0x112,(unsigned char)total_time);

   }

   else

   miniter ++;

   if(lamp_ok)

   {

      if(miniter_rdy == 60)

      {

         miniter_rdy = 0;

  total_time ++;

  EEPROM_write(0x113,total_time_rdy >> 16);

  EEPROM_write(0x114,(unsigned char)total_time_rdy >> 8);

  EEPROM_write(0x115,(unsigned char)total_time_rdy);

      }

      else

      miniter_rdy ++;

   }

   ADCSRA = 0xcf;

}

if(beep_time)

{

  beep_time--;

  BEEP_L;

}

else

BEEP_H;

}

//Watchdog initialize

// prescale: 512K

void watchdog_init(void)

{

WDR (); //this prevents a timeout on enabling

WDTCR |= (1<<WDCE) | (1<<WDE);  

WDTCR = 0x0D; //WATCHDOG ENABLED - dont forget to issue WDRs

}

void port_init(void)

{

PORTA = 0xFF;

DDRA  = 0xFF;

PORTB = 0xFF;

DDRB  = 0xFF;

PORTC = 0x0E; //m103 output only

DDRC  = 0x0F;

PORTD = 0x00;

DDRD  = 0x93;

PORTE = 0x00;

DDRE  = 0x00;

PORTF = 0x01;

DDRF  = 0x01;

PORTG = 0x00;

DDRG  = 0x13;

}

#pragma interrupt_handler int0_isr:iv_INT0

void int0_isr(void)

{

//external interupt on INT0

}

//ADC initialize

// Conversion time: 16uS

void adc_init(void)

{

ADCSRA = 0x00; //disable adc

ADMUX = 0xc1; //select adc input 1

ACSR  = 0x80;

ADCSRA = 0xcf;//|| 0x40;

}

#pragma interrupt_handler adc_isr:iv_ADC

void adc_isr(void)

{

//conversion complete, read value (int) using...

  ad_value=ADCL;            //Read 8 low bits first (important)

  ad_value|=(int)ADCH << 8; //read 2 high bits and shift into top byte

  temp_flag = 1;

}

//call this routine to initialize all peripherals

void init_devices(void)

{

//stop errant interrupts until set up

CLI(); //disable all interrupts

XDIV  = 0x00; //xtal divider

XMCRA = 0x00; //external memory

port_init();

//watchdog_init();

//adc_init();

//timer0_init();

//timer1_init();

//timer2_init();

uart0_init();

uart1_init();

MCUCR = 0x00;

EICRA = 0x00; //extended ext ints

EICRB = 0x00; //extended ext ints

EIMSK = 0x00;

TIMSK = 0x45; //timer interrupt sources

ETIMSK = 0x00; //extended timer interrupt sources

SEI(); //re-enable interrupts

//all peripherals are now initialized

}

void DisString(unsigned short x,unsigned short y,unsigned int word_color,unsigned int ground_color,unsigned char big,char * string)

{

  unsigned char i = 0;

  SetColor(word_color,ground_color);

  //AA 55 00 00 00 00 49 CC 33 C3 3C

  TxUart1(0xaa);

  if(big)

  TxUart1(0x55);

  else

  TxUart1(0x6f);

  TxUart1( (uchar)((x*EIGHT_SWITCH) >> 8) );

  TxUart1( (uchar)(x*EIGHT_SWITCH) );

  TxUart1( (uchar)((y*EIGHT_SWITCH) >> 8) );

  TxUart1( (uchar)(y*EIGHT_SWITCH) );

  while(string[i] != 0)

  {

   TxUart1(string[i]);

   i++;

  }

  TxUart1(0xcc);

  TxUart1(0x33);

  TxUart1(0xc3);

  TxUart1(0x3c);

}

控制AVR单片机5路PWM波形

控制AVR单片机5路PWM波形

控制AVR单片机5路PWM波形