单片机驱动ADC0809汇编语言源码

ID:423499 · 发表于 2018-11-9 12:02

ADC0809实验参考程序：

1. 主程序

ORG 0000H
AJMP MAIN
ORG 000BH
AJMP T0SUB
ORG 0030H
MAIN: MOV SP, #5FH；设置堆栈
CLR A
MOV 30H, A；显示缓冲区清零，30H单元存放电压的个位BCD码
MOV 31H, A
MOV 32H, A
MOV 33H, A；31H单元存放电压的小数点后第三位BCD码
MOV 34H, A
MOV 40H, A；读取的电压值单元清零，40H单元存放电压的高两位BCD码
MOV 41H, A；41H单元存放电压的低两位 BCD码
MOV R2, A；转换结果单元清零
MOV TMOD, #01H；设置定时器T0每50ms中断一次
MOV TH0, #4CH
MOV TL0, #00H
SETB ET0
SETB EA
SETB TR0
MOV P2, #0F0H; 关显示器并使ADC0809未选
LOOP: MOV A, R2；根据转换结果查表得到对应的电压值
MOV R3, #00H；R3R4存放2xR2
CLR C
RLC A
MOV R4, A
MOV A, R3
RLC A
MOV R3, A
MOV DPTR,#VTAB；指向电压表首地址
MOV A, R4
ADD A, DPL
MOV DPL, A
MOV A, R3
ADDC A, DPH
MOV DPH, A
CLR A
MOVC A, @A+DPTR
MOV R0, #40H
MOV @R0, A
INC DPTR；读取电压值的第二个字节
CLR A
MOVC A, @A+DPTR
INC R0
MOV @R0, A
ACALL DISPLAY；调用显示子程序
ACALL DELAY1ms；调用延时子程序
SJMP LOOP
显示子程序：
DISPLAY: MOV R1, #30H；拆分BCD码
MOV R0, #40H；指向读取的电压值的单元
MOV A, @R0
ANL A, #0F0H
SWAP A
MOV @R1, A
INC R1
MOV A, @R0
ANL A, #0FH
MOV @R1, A
INC R0；拆分第二个字节的BCD码
INC R1
MOV A, @R0
ANL A, #0F0H
SWAP A
MOV @R1, A
INC R1
MOV A, @R0
ANL A, #0FH
MOV @R1, A
MOV P2, #0F0H；关显示器，P2口的低四位控制四位数码管的显示位置
MOV DPTR, #SEGTAB；指向段码表
MOV R1, #30H
MOV A, @R1
MOVC A, @A+DPTR
MOV P1, A；显示个位电压值
ANL P1,#7FH；点亮小数点
MOV P2, #0F1H；P2.0置位，显示个位数码
ACALL DELAY1ms；延时1ms
MOV P2, #0F0H；关闭显示器
INC R1
MOV A, @R1；显示小数点后第一位电压值
MOVC A, @A+DPTR
MOV P1, A
MOV P2, #0F2H
ACALL DELAY1ms
MOV P2, #0F0H
INC R1；显示小数点后第二位电压值
MOV A, @R1
MOVC A, @A+DPTR
MOV P1, A
MOV P2, #0F4H
ACALL DELAY1ms
MOV P2, #0F0H
INC R1；显示小数点后第三位电压值
MOV A, @R1
MOVC A, @A+DPTR
MOV P1, A
MOV P2, #0F8H
ACALL DELAY1ms
MOV P2, #0F0H；关显示器
RET
1ms延时子程序：
DELAY1ms: MOV R5, #02H
L1: MOV R6, #0F0H
DJNZ R6, $
DJNZ R5, L1
RET
定时采样中断服务子程序：
T0SUB: PUSH ACC；保护现场
PUSH 00H
MOV TH0, #4CH；恢复初值50ms
MOV TL0, #00H
CLR P2.7；启动ADC0809的0通道转换（A15）
MOV R0, #0F0H
MOVX @R0, A
NOP
NOP
NOP
NOP
JNB P3.0, $；转换结束吗？
MOVX A, @R0；读取转换结果
MOV R2, A
SETB P2.7；ADC0809退出选中
POP 00H；恢复现场
POP ACC
RETI
SEGTAB: DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H；段码表
VTAB: DB 00H,00H,00H,20H,00H,39H,00H,59H；电压值表格
DB 00H,78H,00H,98H,01H,12H,01H,38H
DB 01H,56H,01H,76H,01H,95H,02H,15H
DB 02H,34H,02H,54H,02H,80H,03H,00H
DB 03H,20H,03H,40H,03H,60H,03H,80H
DB 03H,91H,04H,10H,04H,30H,04H,49H
DB 04H,69H,04H,88H,05H,08H,05H,27H
DB 05H,47H,05H,66H,05H,86H,06H,05H
DB 06H,25H,06H,45H,06H,64H,06H,84H
DB 07H,03H,07H,23H,07H,42H,07H,62H
DB 07H,81H,08H,01H,08H,20H,08H,40H
DB 08H,59H,08H,79H,08H,98H,09H,18H
DB 09H,38H,09H,57H,09H,77H,09H,96H
DB 10H,16H,10H,35H,10H,55H,10H,74H
DB 10H,94H,11H,13H,11H,33H,11H,52H
DB 11H,72H,11H,91H,12H,11H,12H,30H
DB 12H,50H,12H,70H,12H,89H,13H,09H
DB 13H,28H,13H,48H,13H,67H,13H,87H
DB 14H,06H,14H,26H,14H,45H,14H,65H
DB 14H,84H,15H,04H,15H,23H,15H,43H
DB 15H,63H,15H,82H,16H,02H,16H,21H
DB 16H,41H,16H,60H,16H,80H,16H,99H
DB 17H,19H,17H,38H,17H,58H,17H,77H
DB 17H,97H,18H,16H,18H,36H,18H,55H
DB 18H,75H,18H,95H,19H,14H,19H,34H
DB 19H,53H,19H,73H,19H,92H,20H,12H
DB 20H,31H,20H,51H,20H,70H,20H,90H
DB 21H,09H,21H,29H,21H,48H,21H,68H
DB 21H,88H,22H,07H,22H,27H,22H,46H
DB 22H,66H,22H,85H,23H,05H,23H,24H
DB 23H,44H,23H,63H,23H,83H,24H,02H
DB 24H,22H,24H,41H,24H,61H,24H,80H
DB 25H,00H,25H,19H,25H,39H,25H,59H
DB 25H,78H,25H,98H,26H,17H,26H,37H
DB 26H,56H,26H,76H,26H,95H,27H,15H
DB 27H,34H,27H,54H,27H,73H,27H,93H
DB 28H,13H,28H,32H,28H,52H,28H,71H
DB 28H,91H,29H,10H,29H,30H,29H,49H
DB 29H,69H,29H,88H,30H,08H,30H,27H
DB 30H,47H,30H,66H,30H,86H,31H,05H
DB 31H,25H,31H,45H,31H,64H,31H,83H
DB 32H,03H,32H,23H,32H,42H,32H,62H
DB 32H,81H,33H,01H,33H,20H,33H,40H
DB 33H,59H,33H,79H,33H,98H,34H,18H
DB 34H,38H,34H,57H,34H,77H,34H,96H
DB 35H,16H,35H,35H,35H,55H,35H,75H
DB 35H,94H,36H,13H,36H,33H,36H,52H
DB 36H,72H,36H,91H,37H,11H,37H,30H
DB 37H,50H,37H,70H,37H,89H,38H,09H
DB 38H,28H,38H,48H,38H,67H,38H,88H
DB 39H,06H,39H,26H,39H,45H,39H,65H
DB 39H,84H,40H,04H,40H,23H,40H,43H
DB 40H,63H,40H,82H,41H,02H,41H,21H
DB 41H,41H,41H,60H,41H,80H,41H,99H
DB 42H,19H,42H,38H,42H,58H,42H,77H
DB 42H,97H,43H,16H,43H,36H,43H,55H
DB 43H,75H,43H,95H,44H,14H,44H,34H
DB 44H,53H,44H,73H,44H,92H,45H,12H
DB 45H,31H,45H,51H,45H,70H,45H,89H
DB 46H,09H,46H,29H,46H,48H,46H,68H
DB 46H,88H,47H,07H,47H,27H,47H,46H
DB 47H,66H,47H,85H,48H,05H,48H,24H
DB 48H,44H,48H,63H,48H,83H,49H,02H
DB 49H,22H,49H,41H,49H,61H,49H,80H
END

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ID:1 · 发表于 2018-11-9 15:27

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