单片机中红外遥控

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#include <reg52.h> #include <stdio.h> #include "./delay/delay.h" #include "./lcd1602/lcd1602.h" unsigned int irtime = 0; bit startflag = 0; unsigned char irdata[33]; unsigned char ircood[4]; bit irok = 0; sbit IR = P3^2; void timer0() { EA = 1; TMOD |= 0x02; TH0 = 0; TL0 = 0; ET0 = 1; TR0 = 1; } void int0() { EA = 1; IT0 = 1; EX0 = 1; } void int0_isr() interrupt 0 { static unsigned char bitnum = 0; if(1 == startflag) { if((irtime > 40) && (irtime < 60)) { bitnum = 0; } irdata[bitnum] = irtime; bitnum++; irtime = 0; if(33 == bitnum) { irok = 1; bitnum = 0; startflag = 0; } } else { startflag = 1; irtime = 0; } } void timer0_isr() interrupt 1 { irtime++; } unsigned char irprocess() { unsigned char i,j,k; unsigned char temp; k = 1; for(j = 0; j < 4; j++) { for(i = 0; i < 8; i++) { temp >>= 1; if(irdata[k] > 6) { temp += 0x80; } k++; } ircood[j] = temp; } if((ircood[0] + ircood[1] == 0xff) && (ircood[2] + ircood[3] == 0xff)) { switch(ircood[2]) { case 0x16: return 0; case 0x0c: return 1; case 0x18: return 2; case 0x5e: return 3; case 0x08: return 4; case 0x1c: return 5; case 0x5a: return 6; case 0x42: return 7; case 0x52: return 8; case 0x4a: return 9; case 0x45: return 10; case 0x46: return 11; case 0x47: return 12; case 0x44: return 13; case 0x40: return 14; case 0x43: return 15; case 0x07: return 16; case 0x15: return 17; case 0x09: return 18; case 0x19: return 19; case 0x0d: return 20; default: break; } } return 0xff; } void display() { unsigned char high,low; unsigned char i; for(i = 0; i < 4; i++) { high = ircood[i]/16; low = ircood[i]%16; if(high > 9) { high += 0x37; } else { high += 0x30; } if(low > 9) { low += 0x37; } else { low += 0x30; } lcd_print(1, 2*i+1, high); lcd_print(1, 2*i + 2, low); } } void irdisplay(unsigned char num) { unsigned char high,low; high = num/10 +0x30; low = num%10 + 0x30; lcd_print(2, 1, high); lcd_print(2, 2, low); } void main() { unsigned char keynum; lcd_init(); timer0(); int0(); while(1) { if(1 == irok) { irok = 0; keynum = irprocess(); display(); if(keynum != 0xff) { irdisplay(keynum); } } } }