微處理器 - Samsung S3C44B0X - Assembly - LED

LED連接到GPG-5


暫存器


main.s

    .equiv PCONG, 0x1d20040
    .equiv PDATG, 0x1d20044

    .text
    .global _start
_start:    b reset
_undef:    b .
_swi:      b .
_pabort:   b .
_dabort:   b .
_reserved: b .
_irq:      b .
_fiq:      b .

reset:
    ldr r0, =PCONG
    ldr r1, =(1 << 10)
    str r1, [r0]

    ldr r0, =PDATG
0:
    eor r1, #(1 << 5)
    str r1, [r0]
    ldr r2, =50000
1:
    subs r2, #1
    bne 1b
    b 0b
    .end

main.ld

MEMORY {
    FLASH : ORIGIN = 0, LENGTH = 32K
}

SECTIONS {
    text : {
        *(.text)
    } > FLASH
}

Makefile

all:
	arm-none-eabi-as -mcpu=arm7 -o main.o main.s
	arm-none-eabi-ld -T main.ld -o main.elf main.o
	arm-none-eabi-objcopy -O binary main.elf main.bin

clean:
	rm -rf main.bin main.o main.elf

編譯

$ make
    arm-none-eabi-as -mcpu=arm7 -o main.o main.s
    arm-none-eabi-ld -T main.ld -o main.elf main.o
    arm-none-eabi-objcopy -O binary main.elf main.bin

Target Device


Samsung S3C44B0X


JTAG 4000KHz


配置完成


User target RAM


Flash bank


Target => Connect


按下CTRL + O按鍵，載入main.bin，載入位址0x0000


載入完成


按下F4(Erase Chip)


按下F5(Program)


按下F9(Start Application)