2019年11月16日 | avr单片机双通信C程序

将下面2个程序分别烧录进2个单片机中.

单片机U1

//ICC-AVR application builder : 2013-6-14 10:17:58

// Target : M16

// Crystal: 8.0000Mhz

#include

#include

#define LED1_ON PORTD|=(1<#define LED1_OFF PORTD&=~(1<#define LED2_ON PORTD|=(1<#define LED2_OFF PORTD&=~(1<//共阳极数码管

unsigned char table[]={0XC0,0XF9,0XA4,0xB0,0x99,0x92,0x82,0xF8,0X80,0X90,0X88,0X83,0XC6,0XA1,0X86,0X8e};

unsigned char count=0,count_h,count_l;

unsigned char a=0,cnt,cnt1;

unsigned char key,count_temp;

void port_init(void)

{

 PORTA = 0xFF;

 DDRA  = 0x00;

 PORTB = 0xFF;

 DDRB  = 0x00;

 PORTC = 0xFF; //m103 output only

 DDRC  = 0xFF;

 PORTD = 0xFF;

 DDRD  = 0x32;

}

//TIMER0 initialize - prescale:256

// WGM: Normal

// desired value: 0.005Sec

// actual value:  0.005Sec (0.2%)

void timer0_init(void)

{

 TCCR0 = 0x00; //stop

 TCNT0 = 0x64; //set count

 OCR0  = 0x9C;  //set compare

 TCCR0 = 0x04; //start timer

}

#pragma interrupt_handler timer0_ovf_isr:iv_TIM0_OVF

void timer0_ovf_isr(void)

{

    a++;

 TCNT0 = 0x64; //reload counter value

}

//UART0 initialize

// desired baud rate: 9600

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

void uart0_init(void)

{

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

 UCSRA = 0x00;

 UCSRC = BIT(URSEL) | 0x06;

 UBRRL = 0x33; //set baud rate lo

 UBRRH = 0x00; //set baud rate hi

 UCSRB = 0x98;

}

#pragma interrupt_handler uart0_rx_isr:iv_USART0_RXC

void uart0_rx_isr(void)

{

 //uart has received a character in UDR

    unsigned char udr0;

 udr0=UDR;

 count_temp=udr0;

}

//call this routine to initialize all peripherals

void init_devices(void)

{

 //stop errant interrupts until set up

 CLI(); //disable all interrupts

 port_init();

 timer0_init();

 uart0_init();

 MCUCR = 0x00;

 GICR  = 0x00;

 TIMSK = 0x01; //timer interrupt sources

 SEI(); //re-enable interrupts

 //all peripherals are now initialized

}

//发送数据uart0_TX

//函数功能：把要发送的数据data送到发送数据缓存器UDR中，然后发送出去

void uart0_TX(unsigned char data)

{

     while(!(UCSRA&(1<  UDR=data;

}

//8M晶振频率下的延时一毫秒

void delay(unsigned int k)

{

    unsigned int m,n;

 for(m=0;m {

     for(n=0;n<1140;n++)

  {;}

 }

}

//数码管显示函数

void display(void)

{

    count_h=count/10;

 count_l=count%10;

 PORTC=table[count_h];

 LED1_ON;

 delay(1);//这个延时很重要，不加的话CUP运行过快将会导致LED数码管无法显示；

 LED1_OFF;

 PORTC=table[count_l];

 LED2_ON;

 delay(1);

 LED2_OFF;

}

//主函数

void main(void)

{

    init_devices();

 while(1)

 {

     key=PINB;

  uart0_TX(key);

  display();

  switch(count_temp)

  {

      case 1: TIMSK = 0x01;break;

   case 2: TIMSK = 0x00;break;

   case 3: count=0X00;TIMSK = 0x01;break;

  }

  if(a==150)

  {

      a=0;

   if(count==59)

   { count=0; }

   else { count++; }

  }

 }

}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

单片机U2

 //ICC-AVR application builder : 2013-6-14 10:31:18

// Target : M16

// Crystal: 8.0000Mhz

#include

#include

unsigned char led_dis;

unsigned char count_temp,cnt1,cnt=1;

void port_init(void)

{

 PORTA = 0x00;

 DDRA  = 0x00;

 PORTB = 0xFF;

 DDRB  = 0xFF;

 PORTC = 0x00; //m103 output only

 DDRC  = 0x00;

 PORTD = 0xFF;

 DDRD  = 0x02;

}

//UART0 initialize

// desired baud rate: 9600

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

void uart0_init(void)

{

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

 UCSRA = 0x00;

 UCSRC = BIT(URSEL) | 0x06;

 UBRRL = 0x33; //set baud rate lo

 UBRRH = 0x00; //set baud rate hi

 UCSRB = 0x98;

}

#pragma interrupt_handler uart0_rx_isr:iv_USART0_RXC

void uart0_rx_isr(void)

{

 //uart has received a character in UDR

 unsigned char udr0;

   udr0=UDR;

   led_dis=udr0;

}

#pragma interrupt_handler int0_isr:iv_INT0

void int0_isr(void)

{

 //external interupt on INT0

    cnt++;

 if(cnt==1)

 {  

     count_temp=1;

    }

 else if(cnt==2)

 {

     count_temp=2;

  cnt=0;

 }

}

#pragma interrupt_handler int1_isr:iv_INT1

void int1_isr(void)

{

 //external interupt on INT1

     count_temp=3;

}

//call this routine to initialize all peripherals

void init_devices(void)

{

 //stop errant interrupts until set up

 CLI(); //disable all interrupts

 port_init();

 uart0_init();

 MCUCR = 0x0A;

 GICR  = 0xC0;

 TIMSK = 0x00; //timer interrupt sources

 SEI(); //re-enable interrupts

 //all peripherals are now initialized

}

//发送数据函数

void USART_TX(unsigned char data)

{

    while(!(UCSRA&(1< UDR=data;

}

//主函数

void main(void)

{

    init_devices();

 while(1)

 {

     cnt1=count_temp;

  USART_TX(cnt1);

  PORTB=led_dis;

 }

}