基于51单片机的八位数码管动态显示的汇编语言程序

下面是一个基于51单片机的八位数码管动态显示的汇编语言程序示例：

; 8051 Microcontroller program to display 8-digit dynamic data on 8-segment LED

ORG 0H ; Start of program

MOV DPTR, #DATA ; Load data starting address
MOV R2, #00H ; Initialize counter

LOOP: MOV A, R2 ; Load value of counter
MOV R1, #00H ; Load 0 in R1
DIV AB, #10H ; Divide value of counter by 10
MOV R2, B ; Store remaining value in R2
ADD A, #30H ; Convert value to ASCII
MOV R1, A ; Store value in R1
MOV P0, R1 ; Display value on LED

CALL DELAY ; Call delay subroutine
MOV P0, #00H ; Clear LED
DJNZ DPTR, LOOP ; Decrement DPTR and jump to LOOP if not zero

END ; End of program

DELAY: ; Delay subroutine
MOV R7, #10H ; Load 16-bit value for delay
DELAY_1: MOV R6, #0FFH ; Load 8-bit value for delay
DELAY_2: DJNZ R6, DELAY_2 ; Decrement R6 and jump if not zero
DJNZ R7, DELAY_1 ; Decrement R7 and jump if not zero
RET ; Return from subroutine

DATA: ; Data to be displayed
DB 12345678H ; Load 8-digit hexadecimal number

END ; End of program

这个程序将在八位数码管上动态显示以16进制表示的数字12345678。程序使用了一个DELAY子程序来控制数码管的亮灭，实现动态显示效果。