keil 流水灯汇编语言

好的，针对您的问题，以下是 keil 流水灯汇编语言的代码：

; Define constants
PORTA equ 0x05 ; Port A address
DELAY equ 0x7FFF ; Delay constant

; Define variables
count db 0 ; Counter variable

; Define code segment
cseg at 0x0000
    jmp start ; Jump to start of program

; Define interrupt vector table
org 0x0004
    dw isr ; Interrupt service routine

; Define program code
start:
    mov count, #0 ; Initialize counter
    mov r1, #0 ; Initialize loop counter

loop:
    mov a, #0x01 ; Set bit 0 of accumulator to 1
    mov @r0, a ; Write accumulator to PORTA
    call delay ; Call delay subroutine
    mov a, #0x00 ; Set bit 0 of accumulator to 0
    mov @r0, a ; Write accumulator to PORTA
    call delay ; Call delay subroutine
    inc r1 ; Increment loop counter
    cjne r1, #8, loop ; Loop 8 times

end:
    sjmp end ; Infinite loop

; Define delay subroutine
delay:
    mov r2, #DELAY ; Load delay constant into r2
delay_loop:
    djnz r2, delay_loop ; Decrement r2 and loop until zero
    ret ; Return from subroutine

; Define interrupt service routine
isr:
    inc count ; Increment counter variable
    reti ; Return from interrupt