紅外遙控器接收程序

1、/STC89C52RC/11.0592MHZ#include #include #define uchar unsigned char#define uint unsigned int#define TH0_VALUE 0xc5#define TL0_VALUE 0xc5 / 定時(shí)器計(jì)數(shù)值 #define ANT P24 /紅外IO口，可任意一個(gè)IO/系統(tǒng)變量定義區(qū)=volatile unsigned char irr_b=0,s_s=0;/irr_b接收狀態(tài)指示，s_s顯示許可volatile signed long da=0; /32位數(shù)據(jù)碼volatile unsigned char w

2、b=0, a=0; /wb為接收到的位數(shù)，a為接收到信號(hào)高低電平判斷依據(jù)volatile unsigned int js=0; /定時(shí)器計(jì)數(shù)volatile unsigned char a1=1,a2=1; /上升沿處理變量void timer_init(voidET0=0; TMOD=0x02; TCON=0x10; TL0=TL0_VALUE;TH0=TH0_VALUE;ET0=1;void timer_start(TR0=1;EA=1;void timer0_interrupt(void interrupt 1 /大約63us中斷一次js+;/判斷下降a2=ANT;if (a1>a

3、2 if(irr_b=0 /第一個(gè)中斷irr_b=1; /狀態(tài)為：開(kāi)始接收js=0;else if(irr_b=1 /第二個(gè)以后的中斷a=js; /讀取定時(shí)器的值if(170 判斷是引導(dǎo)，還是數(shù)據(jù) 10.7ms-15.7ms 引導(dǎo)碼長(zhǎng) 13.5ms wb=0; /數(shù)據(jù)計(jì)數(shù)清零 da=0; /數(shù)據(jù)清零js=0; /定時(shí)器清零 else /數(shù)據(jù) if(8 低電平長(zhǎng) 1.125ms wb+;js=0; da=(da<<1 ;elseif(25 高電平長(zhǎng) 2.25ms wb+;js=0; da=(da<<1 +1 ;if(wb>=32 /數(shù)據(jù)長(zhǎng)度夠32位irr_b=0;

4、/狀態(tài)為停止接收wb=0; /數(shù)據(jù)計(jì)數(shù)清零s_s=1; /打開(kāi)顯示許可a1=a2; /a為兩個(gè)下降沿之間的時(shí)間void program(voiduchar ds=0,d1;while(1ds=js;if(ds>250 /定時(shí)器超時(shí)，接收復(fù)位js=0;irr_b=0;da=0;wb=0; s_s=0;if(s_s=1 /顯示開(kāi)關(guān)打開(kāi)，開(kāi)始顯示TR0=0; /關(guān)閉全局中斷/顯示設(shè)備碼d1=da>>8;d1=da; /把long型的da強(qiáng)制轉(zhuǎn)換為char型的d1switch(d1case 0xff:P2=0xff;uart_tx(255;break; /停止，燈全滅case 0x9

5、f:P2=0xfe;uart_tx(191;break; /正轉(zhuǎn)，對(duì)應(yīng)的燈亮case 0x5f:P2=0xfd;uart_tx(239;break; /反轉(zhuǎn)，對(duì)應(yīng)的燈亮case 0xaf:P2=0xfb;uart_tx(251;break; /加速，對(duì)應(yīng)的燈亮case 0x6f:P2=0xf7;uart_tx(254;break; /減速，對(duì)應(yīng)的燈亮default:break; s_s=0; /關(guān)閉顯示開(kāi)關(guān)TR0=1; /開(kāi)全局中斷void delay_ms(unsigned int iunsigned int j;while(i-for(j=0;j<75;j+;void uart_in

6、it(TMOD|=0X20; /只把M1置為1，其余位不變，默認(rèn)為0TH1=0XFD;TL1=0XFD;SCON=0X50; / 設(shè)定串行口工作方式PCON&=0XEF; / 波特率不倍增，只把倍增位置0，其他位保持不變，默認(rèn)為0TR1=1;void uart_tx(unsigned char txdSBUF=txd;while(!TI;TI=0;void uart_cn(unsigned char *cn,unsigned char cn_nubunsigned char i;for(i=0;i<(cn_nub;i+uart_tx(cni; /發(fā)送數(shù)據(jù)i_nop_(;_nop_(;_nop_(;_nop_(;_nop_(; /無(wú)實(shí)際意義，后移cpu指針，使指令按字對(duì)