帮忙看看怎么才能节省代码了？

今天写了个代码，用于按键控制led灯，最后还是运行起来了，但是发现我写这个代码太繁琐了，代码量很大。大神们帮忙分析下，怎么样才能简洁点呢？我找了些同样功能的代码，是用c语言实现的，显得比较简洁。

复制代码 GPBCON    EQU    0X56000010 GPBDAT    EQU    0X56000014 GPBUP    EQU    0X56000018 GPGCON    EQU    0X56000060 GPGDAT    EQU    0X56000064 GPGUP    EQU 0X56000068 LED1    EQU    ~(1<<5)                    ;led1亮 LED2    EQU    ~(1<<6)                    ;led2亮 LED3    EQU    ~(1<<7)                    ;led3亮 LED4    EQU    ~(1<<8)                    ;led4亮 LED5    EQU ~((1<<8) | (1<<5))        ;led5亮 LED6    EQU ~((1<<8) | (1<<6))        ;led6亮 K1MSK    EQU    (1<<0)                    ;判断按键1按下的掩码 K2MSK    EQU    (1<<3)                    ;判断按键2按下的掩码 K3MSK    EQU    (1<<5)                    ;判断按键3按下的掩码 K4MSK    EQU    (1<<6)                    ;判断按键4按下的掩码 K5MSK    EQU    (1<<7)                    ;判断按键5按下的掩码 K6MSK    EQU    (1<<11)                    ;判断按键6按下的掩码             AREA LED,CODE,READONLY             ENTRY             CODE32 START             LDR R0,=GPBCON        ;led控制初始化             LDR R1,=0X15400             STR R1,[R0]            ;led数据初始化             LDR R0,=GPBDAT             LDR R1,=0X3FF             STR R1,[R0]                              LDR R0,=GPGCON        ;按键控制初始化             LDR R1,=0XFF3F033C             STR R1,[R0]             LDR R0,=GPGDAT        ;按键数据初始化             LDR R1,=0X8E9             STR R1,[R0]              LOOP                     LDR R1,=GPGDAT        ;查询按键1是否按下             LDR    R0,[R1]             AND R0,R0,#K1MSK    ;GPGDAT的数据和K1的掩码相与，若为0表示按键1按下             CMP R0,#0             BEQ    L1ON                          LDR R1,=GPGDAT        ;查询按键2是否按下             LDR    R0,[R1]             AND R0,R0,#K2MSK    ;             CMP R0,#0             BEQ    L2ON                          LDR R1,=GPGDAT        ;查询按键3是否按下             LDR    R0,[R1]             AND R0,R0,#K3MSK             CMP R0,#0             BEQ    L3ON                          LDR R1,=GPGDAT        ;查询按键4是否按下             LDR    R0,[R1]             AND R0,R0,#K4MSK             CMP R0,#0             BEQ    L4ON                          LDR R1,=GPGDAT        ;查询按键5是否按下             LDR    R0,[R1]             AND R0,R0,#K5MSK             CMP R0,#0             BEQ    L5ON                          LDR R1,=GPGDAT        ;查询按键6是否按下             LDR    R0,[R1]             AND R0,R0,#K6MSK             CMP R0,#0             BEQ    L6ON                          B LOOP          DELAY             LDR R3,=0X400000        ; TAG             SUB R3,R3,#1             CMP R3,#0             BNE TAG             MOV PC,LR              L1ON                            ;LED1亮（下同）             LDR    R0,=GPBDAT             LDR R1,=LED1             STR R1,[R0]             B    LOOP L2ON             LDR    R0,=GPBDAT             LDR R1,=LED2             STR R1,[R0]             B    LOOP L3ON             LDR    R0,=GPBDAT             LDR R1,=LED3             STR R1,[R0]             B    LOOP L4ON             LDR    R0,=GPBDAT             LDR R1,=LED4             STR R1,[R0]             B    LOOP L5ON             LDR    R0,=GPBDAT             LDR R1,=LED5             STR R1,[R0]             B    LOOP L6ON             LDR    R0,=GPBDAT             LDR R1,=LED6             STR R1,[R0]             B    LOOP                          END