[ARM 프로세서_Day3]Linux+ARM(환경설정)

■환경 설정■

(Ubuntu)

공유파일에 03-06_Ch3_Basic_Devices.zip 추가

#unzip 03-06_Ch3_Basic_Devices

#cd 03-06_Ch3_Basic_Devices/SOURCE/

#vi Makefile

기존의 TOOLPATH 주석처리

TOOLPATH = /root/arm-2011.03 추가 ==>make 되는지 확인

#vi Main.c

16번줄 ->#define EXAMPLE 320 수정

85번줄 함수에서

int a,b,result;

a=10; b=20; 

result = CONDITIONAL_EXECUTE(a,b);

Uart_Printf("\n result=%d",result);

Uart_Printf("\n");

추가

#vi s3c2450_startup.S

93번줄(reset handler 아래)

.globl CONDITIONAL_EXECUTE 추가

CONDITIONAL_EXECUTE :

cmp r0,r1

movLT r0,#1

movGt r0,#2

movEQ r0,#3

mov pc,lr

추가

#make clean

#make

#cp MDS2450.bin /tftpboot

#LED 켜기

.globl LED_ON
.globl LOOP
 
 
 
LED_ON:
 
    ldr     r0,=GPGCON
 
    ldr     r1,=0x5500
 
    str    r1,[r0]
 
 
 
    ldr    r0,=GPGDAT
 
    ldr    r1,=0xf0
 
    str    r1,[r0]
 
 
 
    ldr    r0,=GPGDAT
 
    ldr    r1,=0xe0
 
    str    r1,[r0]
 
bl LOOP
 
ldr    r0,=GPGDAT
 
    ldr    r1,=0xd0
 
    str    r1,[r0]
 
bl LOOP
 
ldr    r0,=GPGDAT
 
    ldr    r1,=0xb0
 
    str    r1,[r0]
 
bl LOOP
 
ldr    r0,=GPGDAT
 
    ldr    r1,=0x70
 
    str    r1,[r0]
 
bl LOOP
 
 
 
b LED_ON
 
 
 
 
 
LOOP:
 
    ldr r3,=0
 
    ldr r4,=5000000
 
LOOP1:    
 
    add r3,r3,#1
 
    cmp r3,r4
 
bne    LOOP1