ADC0809轉(zhuǎn)換程序

程序框圖

電路

程序

ORG 05A0H

05A0 758153 SE11: MOV SP,#53H

05A3 757E00 MOV 7EH,#00H

05A6 757D08 MOV 7DH,#08H

05A9 757C00 MOV 7CH,#00H

05AC 757B09 MOV 7BH,#09H

05AF 757A10 MOV 7AH,#10H

05B2 757910 MOV 79H,#10H ;顯示緩沖區(qū)初值

05B5 120425 LO18: LCALL DIS ;顯示

05B8 7400 MOV A, #00H

05BA 90FFE0 MOV DPTR,#0FFE0H

05BD F0 MOVX @DPTR,A ;0809的0通道采樣

05BE 120425 LCALL DIS

05C1 E0 MOVX A,@DPTR ;取出采樣值

05C2 7879 MOV R0,#79H

05C4 120077 LCALL PTDS ;采樣值送顯示緩沖區(qū)

05C7 80EC SJMP LO18 ;循環(huán)

ORG 0077H

0077 F9 PTDS: MOV R1,A ;拆送顯示緩沖區(qū)

0078 117C ACALL PTDS1

007A E9 MOV A,R1

007B C4 SWAP A

007C 540F PTDS1: ANL A, #0FH

007E F6 MOV @R0,A

007F 08 INC R0

0080 22 RET

ORG 0425H

0425 C083 DIS: PUSH DPH

0427 C082 PUSH DPL

0429 D2D4 SETB RS1

042B 787E MOV R0,#7EH

042D 7A20 MOV R2,#20H

042F 7B00 MOV R3,#00H

0431 90044F MOV DPTR, #LS0

0434 E6 LS2: MOV A,@R0

0435 93 MOVC A,@A+DPTR

0436 79DC MOVX R1, #0DCH

0439 EA MOV A,R2

043A 09 INC R1

043B F3 MOVX @R1,A

043C DBFE LS1: DJNZ R3, LS1

043E C3 CLR C

043F 13 RRC A

0440 FA MOV R2,A

0441 18 DEC R0

0442 70F0 JNZ LS2

0444 F2 MOVX @R0,A

0445 18 DEC R0

0446 F4 CPL A

0447 F2 MOVX @R0,A

0448 C2D4 CLR RS1

044A D082 POP DPL

044C D083 POP DPH

044E 22 RET

044F C0F9A4 LS0: DB 0C0H, 0F9H,0A4H, 0B0H, 99H, 92H ;字形表

0452 B09992

0455 82F880 DB 82H, 0F8H, 80H, 90H, 88H, 83H, 0C6H

0458 908883

045B C6

045C A1868E DB 0A1H, 86H, 8EH, 0FFH, 0CH, 89H, 7FH, 0BFH

045F FF0C89

0462 7FBF

END