微處理器 - MediaTek MT7688 (HLK-RM08S) - Assembly - LED

LED是連接到GPIO-21


Output


Data


main.s

    .extern _start
    .set noreorder

    .equ GPIO_CTRL_0, 0xb0000600
    .equ GPIO_DATA,   0xb0000620
 
    .text
_start:
    b reset
 
    .org 0x400
reset:
    li $8, GPIO_CTRL_0
    li $9, (1 << 21)
    sw $9, 0($8)
 
    li $8, GPIO_DATA
    li $9, (1 << 21)
    li $10, 0
loop:
    xor $10, $9
    sw $10, 0($8)

    li $5, 5000
0:
    addi $5, $5, -1
    bnez $5, 0b
    nop
    b loop
    nop

main.ld

OUTPUT_FORMAT("elf32-tradlittlemips", "elf32-tradbigmips", "elf32-tradlittlemips")
OUTPUT_ARCH(mips)
ENTRY(_start)

SECTIONS {
    . = 0x00000000;
    .text : { *(.text) }
    .data : { *(.data) }
    .bss  : { *(.bss)  }
}

Makefile

all:
	mipsel-linux-as -o main.o main.s
	mipsel-linux-ld -T main.ld -o main.elf main.o
	mipsel-linux-objcopy -O binary main.elf main.bin

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

編譯

$ make
    mipsel-linux-as -o main.o main.s
    mipsel-linux-ld -T main.ld -o main.elf main.o
    mipsel-linux-objcopy -O binary main.elf main.bin

接著使用NeoProgrammer將main.bin燒錄到Flash


接著重新上電即可