AVR单片机用输入捕捉功能接收红外程序

//红外发射电路及程序的说明： //1.电路采用三个红外发射管并联的形式，通过脉冲发射的方式，电流可以达到100mA的样子，发射距离最大可达10m. //2.调制载波为38KHz,占空比为50%，通过定时器中断0的方式实现，故需定时为13us触发一次中断。调制信号通过对定时器0的中断次数 //计数来发射时间，通过状态机的理念实现。 //3.时钟的同步通过开始后的通信校准时间、调时时的按键键码发射、每一天校准一次时间来实现。 //4.在该电路中实现遥控器调时、定时的功能。 #include<stdio.h> #include<string.h> #define F_CPU 8000000 // 定义CPU频率为8MHz #include<util/delay.h> #include<avr/io.h> #include<avr/iom16.h> #include<avr/interrupt.h> #define uchar unsigned char #define uint unsigned int #define ulong unsigned long #define delay_us(x) _delay_us(x) //延时x us #define delay_ms(x) _delay_ms(x) //延时x ms #define error 0 #define ok 1 //****************************/ // 参数宏定义 //****************************/ volatile uint time; //接收时两个下降沿之间的时间间隔 volatile uchar flag_red_read=0; //接收数据中断标识符 // uchar data_read[4]={0x00,0x00,0x00,0x00}; //接收的四个字节的数据 uchar data,data1,flag; //接收到的数据内容、接收成功标志 //****************************/ // 宏定义区 //****************************/ volatile uchar year=0,month=0,day=0,hour=0,min=0,second=0,temprature=0; volatile uchar flag_mode=0,flag_alarm=0; //********************************************* // 共阴数码管对应表0-F //********************************************* uchar table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; //该电路中用的为共阳数码管，故使用时需取反 //******************************/ // 端口宏定义 //******************************/ #define RCK_SET PORTA|= (1<<PA0) //LED控制 #define RCK_CLR PORTA&=~(1<<PA0) #define SRCK_SET PORTA|= (1<<PA1) #define SRCK_CLR PORTA&=~(1<<PA1) #define DATA_SET PORTA|= (1<<PA2) #define DATA_CLR PORTA&=~(1<<PA2) #define DATA_IO PORTB //数码管数据端口 #define DULA_CLR PORTD&=~(1<<PD1) #define DULA_SET PORTD|= (1<<PD1) #define WELA_CLR PORTD&=~(1<<PD0) #define WELA_SET PORTD|= (1<<PD0) #define L9_CLR PORTD&=~(1<<PD2) #define L9_SET PORTD|= (1<<PD2) #define L10_CLR PORTD&=~(1<<PD3) #define L10_SET PORTD|= (1<<PD3) #define L11_CLR PORTD&=~(1<<PD4) #define L11_SET PORTD|= (1<<PD4) #define L12_CLR PORTD&=~(1<<PD5) #define L12_SET PORTD|= (1<<PD5) #define BELL_SET PORTC&=~(1<<PC0) #define BELL_CLR PORTC|= (1<<PC0) //****************************/ // 功能子程序 //****************************/ //显示日期和温度程序 void display_1(uchar dat1,uchar dat2,uchar dat3,uchar dat4) { uchar t; WELA_SET; //显示20 DATA_IO=0x00; WELA_CLR; L9_SET; L10_CLR; L11_CLR; L12_CLR; DULA_SET; DATA_IO=~table[2]; DULA_CLR; delay_us(100); WELA_SET; DATA_IO=0x00; WELA_CLR; L9_CLR; L10_SET; L11_CLR; L12_CLR; DULA_SET; DATA_IO=~table[0]; DULA_CLR; delay_us(100); WELA_SET; //显示年（dat1） DATA_IO=0x00; WELA_CLR; L9_CLR; L10_CLR; L11_SET; L12_CLR; DULA_SET; t=dat1>>4; DATA_IO=~table[t]; DULA_CLR; delay_us(100); WELA_SET; DATA_IO=0x00; WELA_CLR; L9_CLR; L10_CLR; L11_CLR; L12_SET; DULA_SET; t=dat1&0x0f; DATA_IO=~table[t]; DULA_CLR; delay_us(100); L9_CLR; //显示月（dat2） L10_CLR; L11_CLR; L12_CLR; WELA_SET; DATA_IO=0x01; WELA_CLR; DULA_SET; t=dat2>>4; DATA_IO=~table[t]; DULA_CLR; delay_us(100); L9_CLR; L10_CLR; L11_CLR; L12_CLR; WELA_SET; DATA_IO=0x02; WELA_CLR; DULA_SET; t=dat2&0x0f; DATA_IO=~table[t]; DULA_CLR; delay_us(100); L9_CLR; //显示“-” L10_CLR; L11_CLR; L12_CLR; WELA_SET; DATA_IO=0x04; WELA_CLR; DULA_SET; DATA_IO=0xbf; DULA_CLR; delay_us(100); L9_CLR; //显示日（dat3） L10_CLR; L11_CLR; L12_CLR; WELA_SET; DATA_IO=0x08; WELA_CLR; DULA_SET; t=dat3>>4; DATA_IO=~table[t]; DULA_CLR; delay_us(100); L9_CLR; L10_CLR; L11_CLR; L12_CLR; WELA_SET; DATA_IO=0x10; WELA_CLR; DULA_SET; t=dat3&0x0f; DATA_IO=~table[t]; DULA_CLR; delay_us(100); L9_CLR; //显示空格 L10_CLR; L11_CLR; L12_CLR; WELA_SET; DATA_IO=0x20; WELA_CLR; DULA_SET; DATA_IO=0xff; DULA_CLR; delay_us(100); L9_CLR; //显示温度（dat4） L10_CLR; L11_CLR; L12_CLR; WELA_SET; DATA_IO=0x40; WELA_CLR; DULA_SET; t=dat4>>4; DATA_IO=~table[t]; DULA_CLR; delay_us(100); L9_CLR; L10_CLR; L11_CLR; L12_CLR; WELA_SET; DATA_IO=0x80; WELA_CLR; DULA_SET; t=dat4&0x0f; DATA_IO=~table[t]; DULA_CLR; delay_us(100); } //用LED显示 时、分、秒 void display_2(uchar dat1,uchar dat2,uchar dat3) { uchar i,t,num[72]={0,0}; t=(dat1>>4)*10+(dat1&0x0f); //将时(dat1)转换为LED显示 if((t%12)!=0) { num[(t%12)-1]=1; } else { num[11]=1; } t=(dat2>>4)*10+(dat2&0x0f); //将分(dat2)转换为LED显示 if(t<57) { num[t+15]=1; } else { switch(t) { case 57: num[12]=1;break; case 58: num[13]=1;break; case 59: num[14]=1;break; case 60: num[15]=1;break; default: break; } } t=(dat3>>4)*10+(dat3&0x0f); //将秒(dat2)转换为LED显示 if(t<57) { num[t+15]=1; } else { switch(t) { case 57: num[12]=1;break; case 58: num[13]=1;break; case 59: num[14]=1;break; case 60: num[15]=1;break; default: break; } } for(i=72;i>0;i--) //显示数据 { if(num[i-1]) { DATA_SET; } else { DATA_CLR; } SRCK_CLR; SRCK_SET; } RCK_CLR; RCK_SET; } //调时及初始化时的显示(关闭LED,数码管显示“-”) void display_3(void) { uchar i; for(i=72;i>0;i--) //关闭所有LED { DATA_CLR; SRCK_CLR; SRCK_SET; } RCK_CLR; RCK_SET; L9_SET; L10_SET; L11_SET; L12_SET; WELA_SET; DATA_IO=0xFF; WELA_CLR; DULA_SET; DATA_IO=0xbf; DULA_CLR; } /* //显示一个字节数据 void display(uchar dat) { uchar t,temp; temp=dat; WELA_SET; DATA_IO=0x00; WELA_CLR; L9_CLR; L10_CLR; L11_SET; L12_CLR; DULA_SET; // t=temp/10; t=temp>>4; DATA_IO=~table[t]; DULA_CLR; delay_ms(5); WELA_SET; DATA_IO=0x00; WELA_CLR; L9_CLR; L10_CLR; L11_CLR; L12_SET; DULA_SET; // t=temp%10; t=temp&0x0f; DATA_IO=~table[t]; DULA_CLR; delay_ms(5); } void display_1(uchar dat) { uchar t,temp; temp=dat; WELA_SET; DATA_IO=0x00; WELA_CLR; L9_SET; L10_CLR; L11_CLR; L12_CLR; DULA_SET; // t=temp/10; t=temp>>4; DATA_IO=~table[t]; DULA_CLR; delay_ms(5); WELA_SET; DATA_IO=0x00; WELA_CLR; L9_CLR; L10_SET; L11_CLR; L12_CLR; DULA_SET; // t=temp%10; t=temp&0x0f; DATA_IO=~table[t]; DULA_CLR; delay_ms(5); }*/ //显示 void display_num(void) { uchar i,num[72]={0,0}; static uchar dis_num=0; num[dis_num]=1; for(i=72;i>0;i--) //关闭所有LED { if(num[i-1]) { DATA_SET; } else { DATA_CLR; } SRCK_CLR; SRCK_SET; } RCK_CLR; RCK_SET; dis_num++; if(dis_num==72) { dis_num=0; } delay_ms(10); } //接收红外数据数据 uchar red_read_byte(void) { static uchar read_state=0,k=0; static uchar data_read[4]; switch(read_state) { case 0:if(time>18500&&time<21700) //头信号 { read_state=1; } else { read_state=0; return error; } break; case 1:if(time>1550&&time<2000) //"0"信号 { data_read[0]=data_read[0]>>1; data_read[0]=data_read[0]&0x7f; k++; } else { if(time>3800&&time<4300) //“1”信号 { data_read[0]=data_read[0]>>1; data_read[0]|=0x80; k++; } else { k=0; read_state=0; return error; } } if(k==8) { read_state=2; k=0; } break; case 2:if(time>1550&&time<2000) //"0"信号 { data_read[1]=data_read[1]>>1;