P1.0和P1.1控制A,B灯.doc

一、ORG 0000HLJMP STARTORG 000BHLJMP IT0PSTART:MOV R0,#0MOV R1,#0CLR P1.0SETB P1.1MOV TMOD,#01HMOV TH0,#3CHMOV TL0,#0B0HSETB EASETB TR0SETB ET0AA:LCALL IT0PLJMP AAIT0P:MOV TH0,#3CHMOV TL0,#0B0HINC R0CJNE R0,#20,RETIMOV R0,#0INC R1CJNE R1,#1,BBSETB P1.0BB:CJNE R1,#2,CCCLR P1.1CC:CJNE R1,#3,DDSETB P1.1DD:CJNE R1,#4,EECLR P1.0CLR P1.1EE:CJNE R1,#5,FFSETB P1.0SETB P1.1FF:MOV R1,#0CLR P1.0RETI此程序低电平时灯亮，高电平时灯灭二、ORG 00HSTART:CLR P1.0LCALL DELAYCPL P1.0LCALL DELAYCLR P1.1LCALL DELAYCPL P1.1MOV P0,0FEHMOV P0,0FFHLJMP STARTDELAY: ;这里是1s的延时程序MOV R1, #20D1: MOV R2, #200D2: MOV R3, #248DJNZ R3,$DJNZ R2,D2DJNZ R3,D1RETEND三、;变量定义LED_A EQU P1.0LED_B EQU P1.1COUNT EQU R0STATE EQU R1;函数起始地址ORG 0000HLJMP MAINORG 000BHLJMP T0_SERVE;主函数MAIN:LCALL INITLOOP:;中断20次为1SCJNE COUNT,#20,$MOV COUNT,#00H;状态鸡LED_A_ON:CJNE STATE,#00,LED_A_OFFCLR LED_ASETB LED_BLED_A_OFF:CJNE STATE,#01,LED_B_ONSETB LED_ASETB LED_BLED_B_ON:CJNE STATE,#02,LED_B_OFFSETB LED_ACLR LED_BLED_B_OFF:CJNE STATE,#03,LED_AB_ONSETB LED_ASETB LED_BLED_AB_ON:CJNE STATE,#04,LED_AB_OFFCLR LED_ACLR LED_BLED_AB_OFF:CJNE STATE,#05,NEXTSETB LED_ASETB LED_B;状态+1，如果状态=6，则清0，然后循环NEXT:INC STATECJNE STATE,#06,LOOPMOV STATE,#00HLJMP LOOP;初始化函数INIT:;定时器0初始化MOV TMOD,#01HMOV TH0,#3CH ;12T单片机MOV TL0,#0B0H ;12M晶振SETB EASETB ET0SETB TR0;其它变量初始化SETB LED_ASETB LED_BMOV COUNT,#00HMOV STATE,