S3C44B0X >> Assembly

LED

---

參考資訊：
1. pm_pdf

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 = 2M
}

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

開啟J-Flash


Target Device


Samsung S3C44B0X


JTAG 4000KHz


配置完成


Target > Connect


連接完成


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)

返回上一頁