（logic contention(s)detected on net #00038）Proteus仿真單片機數碼管不顯示。

ID:562821 · 發表于 2019-6-14 21:21

是共陰極四段數碼管，芯片是c51+74HC245.出現一個錯誤（logic contention(s)detected on net #00038），0號定時器所接14號引腳一直是灰色，74hc245的A端是輸入。但B端沒有輸出。有兩張圖片，還有一份代碼文檔。

仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）

單片機源程序如下:

ORG 00H
JMP MAIN
ORG 0BH
JMP TMR0 ;
MAIN: ;主函數
MOV 31H,#08h
MOV 32H,#08h
MOV 33H,#08h
MOV 34H,#08h
MOV 35H,#00h
MOV 36H,#02h
MOV 37H,#01h
mov th0,#(8192-483)/32
mov TL0,#(8192-483) MOD 32
SETB TR0
mov ie,#82h
change: ;數據轉移函數
mov a,31h
mov 38h,a
mov a,32h
mov 39h,a
mov a,33h
mov 3ah,a
mov a,34h
mov 3bh,a
mov r0,#38h
mov r7,#04h
loop1:
mov a,@r0
XRL A,#00H
JZ CHAN0
mov a,@r0
XRL A,#01H
JZ CHAN1
mov a,@r0
XRL A,#02H
JZ CHAN2
mov a,@r0
XRL A,#03H
JZ CHAN3
mov a,@r0
XRL A,#04H
JZ CHAN4
mov a,@r0
XRL A,#05H
JZ CHAN5
mov a,@r0
XRL A,#06H
JZ CHAN6
mov a,@r0
XRL A,#07H
JZ CHAN7
mov a,@r0
XRL A,#08H
JZ CHAN8
mov a,@r0
XRL A,#09H
JZ CHAN9
LP0:
INC R0
DJNZ R7,LOOP1
LCALL DISP
JMP CHANGE
CHAN0: ;數據轉換函數
MOV @R0,#3FH
JMP LP0
CHAN1:
MOV @R0,#06H
JMP LP0
CHAN2:
MOV @R0,#5BH
JMP LP0
CHAN3:
MOV @R0,#4FH
JMP LP0
CHAN4:
MOV @R0,#66H
JMP LP0
CHAN5:
MOV @R0,#6DH
JMP LP0
CHAN6:
MOV @R0,#7DH
JMP LP0
CHAN7:
MOV @R0,#07H
JMP LP0
CHAN8:
MOV @R0,#7EH
JMP LP0
CHAN9:
MOV @R0,#6FH
JMP LP0
TMR0 : ;計數器函數
PUSH ACC
PUSH PSW
mov th0,#(8192-483)/32
mov tl0,#(8192-483)MOD 32
MOV A,35H
ADD A,#01H
MOV 35H,A
CLR C
MOV R0,#36H
MOV A,31H
ADDC A,@R0
DA A
JBC ACC.4,L11
JMP L12
L11:SETB C
L12:ANL A,#0FH
MOV 31H,A
MOV A,32H
ADDC A,#00H
CLR C
DA A
JBC ACC.4,L13
JMP L14
L13:SETB C
L14:ANL A,#0FH
MOV 32H,A
MOV A,33H
ADDC A,#00H
CLR C
DA A
JBC ACC.4,L15
JMP L16
L15:SETB C
L16:ANL A,#0FH
MOV 33H,A
MOV A,34H
ADDC A,#00H
CLR C
DA A
JBC ACC.4,L17
JMP L18
L17:SETB C
L18:ANL A,#0FH
MOV 34H,A
INC R0
MOV A,32H
ADDC A,@R0
DA A
JBC ACC.4,L19
JMP L20
L19:SETB C
L20:ANL A,#0FH
MOV 32H,A
MOV A,33H
ADDC A,#00H
CLR C
DA A
JBC ACC.4,L21
JMP L22
L21:SETB C
L22:ANL A,#0FH
MOV 33H,A
MOV A,34H
ADDC A,#00H
CLR C
DA A
JBC ACC.4,L23
JMP L24
L23:SETB C
L24:ANL A,#0FH
MOV 34H,A
MOV A,33H
ADDC A,#00H
CLR C
DA A
JBC ACC.4,L25
JMP L26
L25:SETB C
L26:ANL A,#0FH
MOV 33H,A
MOV A,34H
ADDC A,#00H
CLR C
DA A
JBC ACC.4,L27
JMP L28
L27:SETB C
L28:ANL A,#0FH
MOV 34H,A
MOV A,34H
ADDC A,#00H
CLR C
DA A
JBC ACC.4,L29
JMP L30
L29:SETB C
L30:ANL A,#0FH
MOV 34H,A
POP PSW
POP ACC
RETI
DISP: ;顯示函數
MOV A,38H
MOV P0,A
MOV A,#01H
MOV P3,A
LCALL DELAY3MS
MOV A,39H
MOV A,#80H
MOV P0,A
MOV A,#02H
MOV P3,A
LCALL DELAY3MS
MOV A,3AH
MOV P0,A
MOV A,#04H
MOV P3,A
LCALL DELAY3MS
MOV A,3BH
MOV P0,A
MOV A,#08H
MOV P3,A
LCALL DELAY3MS
RET
DELAY1MS: ;延時
MOV R7,#250
L4:NOP
NOP
DJNZ R7,L4
RET
DELAY3MS: ;延時
MOV R6,#3
L1:LCALL DELAY1MS
DJNZ R6,L1
RET

復制代碼

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（logic contention(s)detected on net #00038）Proteus仿真單片機數碼管不顯示。