AREA LED_Comparison, CODE, READONLY,代码进行改正
时间: 2024-02-01 21:16:07 浏览: 26
AREA LED_Comparison, CODE, READONLY
改正后的代码如下:
```
AREA LED_Comparison, CODE, READONLY
; Define the start address of the program
ENTRY
; Define constants
LED1 EQU 0x01
LED2 EQU 0x02
LED3 EQU 0x04
; Define variables
var1 DCD 0x12345678
var2 DCD 0x87654321
; Define the main program
MAIN
LDR R0, =var1 ; Load the address of var1 into R0
LDR R1, [R0] ; Load the value of var1 into R1
LDR R0, =var2 ; Load the address of var2 into R0
LDR R2, [R0] ; Load the value of var2 into R2
; Compare the values of var1 and var2
CMP R1, R2
BEQ LED_ON ; If var1 equals var2, turn on LED1 and LED2
BHI LED2_ON ; If var1 is greater than var2, turn on LED2
BLS LED1_ON ; If var1 is less than var2, turn on LED1
B LED3_ON ; Otherwise, turn on LED3
; Define subroutines to turn on LEDs
LED_ON
LDR R0, =0x07 ; Load the address of the LED control register into R0
MOV R1, #0x07 ; Turn on all LEDs
STR R1, [R0] ; Store the value in R1 into the LED control register
B END_PROGRAM ; Jump to the end of the program
LED1_ON
LDR R0, =0x07 ; Load the address of the LED control register into R0
MOV R1, #LED1 ; Turn on LED1
STR R1, [R0] ; Store the value in R1 into the LED control register
B END_PROGRAM ; Jump to the end of the program
LED2_ON
LDR R0, =0x07 ; Load the address of the LED control register into R0
MOV R1, #LED2 ; Turn on LED2
STR R1, [R0] ; Store the value in R1 into the LED control register
B END_PROGRAM ; Jump to the end of the program
LED3_ON
LDR R0, =0x07 ; Load the address of the LED control register into R0
MOV R1, #LED3 ; Turn on LED3
STR R1, [R0] ; Store the value in R1 into the LED control register
END_PROGRAM
MOV R0, #0 ; Return a value of 0
BX LR ; Return to the calling routine
END
```