4位八段数码管的十进制加计数仿真实验(含电路图和仿真文件)

4位八段数码管的十进制加计数仿真实验，程序采用汇编语言编写。此程序在仿真软件上与EDN-51实验板上均通过。仿真图中的数码管位驱动采用74HC04，如按EDN-51板上用想同的PNP三极管驱动在仿真软件上则无法正常显示。程序共分5块，STAR0为数据初始化，STAR2为计数子程序，STAR3为4位数码管动态显示子程序，STAR4为按键扫描子程序，STS00是延时子程序。由于EDN-51实验板上没装BCD译码器，所以编写程序比较烦琐。

程序如下：

ORG 0000H
                LJMP STAR0                        ;转程序 SRAR0
ORG 0200H                                          ;程序地址 0200H
STAR0:   CLR 00                                  ;位 00 清 0
               MOV P1,#0FFH                    ;#0FFH-->P1
               MOV P2,#0FH                      ;#0FH-->P2
               MOV P0,#0FFH                    ;#0FFH-->P0
               MOV 30H,#00H                    ;#00H-->30H
               MOV 31H,#00H                    ;#00H-->30H
               MOV 32H,#00H                    ;#00H-->30H
               MOV 33H,#00H                    ;#00H-->30H
               LJMP STAR3                        ;转程序 SRAR3
STAR2:   MOV A,#0AH                       ;#0AH-->A
               INC 30H                                ;30H+1
               CJNE A,30H,STJE                 ;30H 与 A 比较,不等转移 STJE
               MOV 30H,#00H                    ;#00H-->30H
               INC 31H                                ;31H+1
               CJNE A,31H,STJE                 ;31H 与 A 比较,不等转移 STJE
               MOV 31H,#00H                    ;#00H-->31H
               INC 32H                                ;32H+1
               CJNE A,32H,STJE                 ;32H 与 A 比较,不等转移 STJE
               MOV 32H,#00H                    ;#00H-->32H
               INC 33H                                ;33H+1
               CJNE A,33H,STJE                 ;33H 与 A 比较,不等转移 STJE
               MOV 33H,#00H                    ;#00H-->33H
               MOV 32H,#00H                    ;#00H-->32H
               MOV 31H,#00H                    ;#00H-->31H
               MOV 30H,#00H                    ;#00H-->30H
STJE:      RET                                        ;子程序调用返回
STAR3:   MOV R0,#30H                      ;#30H-->R0
                MOV R6,#0F7H                   ;#0F7H-->R6
SMG0:    MOV P1,#0FFH                    ;#0FFH-->P1
                MOV A,R6                            ;R6-->A
                MOV P1,A                            ;A-->P1
                RR A                                     ;A向右移一位
                MOV R6,A                           ;A-->R6
                MOV A,@R0                       ;@R0-->A
                ADD A,#04H                        ;#04H-->A
                MOVC A,@A+PC               ;A+PC-->
                MOV P0,A                            ;A-->P0
                AJMP SMG1                        ;转程序 SMG1
SDATA:   DB 0C0H,0F9H,0A4H,0B0H,99H
                DB 92H,82H,0F8H,80H,90H
SMG1:     LCALL STAR4                    ;转子程序 SRAR4
                LCALL STS00                     ;转子程序 STS00
                INC R0                                 ;R0+1
                CJNE R6,#07FH,SMG0       ;#07FH 与 R6 比较,不等转移 SMG0
                AJMP STAR3                       ;转程序 SRAR3
STAR4:    JNB P2.0,ST1                      ;P2.0=0 转 ST1
                CLR 00                                 ;位 00 清 0
                SJMP ST3                            ;转ST3
ST1:         JNB 00,ST2                          ;位 00=0 转 ST2
                SJMP ST3                            ;转 ST3
ST2:         LCALL STAR2                    ;调子程序 STAR2
                SETB 00                               ;位 00 置 1
ST3:         RET                                      ;子程序调用返回
ORG 0100H                                         ;地址 0100H
STS00:     MOV 60H,#003H                ;#003H-->60H  (211)
DE001:     MOV 61H,#0FFH               ;#0FFH-->61H (255)
DE002:     DJNZ 61H,DE002               ;61H 减 1 不等于 0 转 DE002
                 DJNZ 60H,DE001               ;60H 减 1 不等于 0 转 DE001
                 RET                                     ;子程序调用返回
                 END                                    ;结束

上次的程序共有293句，经小组成员建议，本人经几天的研究写了下面的这个程序，现在的程序用了63句，精简了230句。功能没有减。如谁有更简练的程序，请发上来，大家一起学习。

4位八段数码管的十进制加计数仿真实验(含电路图和仿真文件)