微處理器 - Allwinner T113-S3 (MangoPi MQ-R) - Assembly - LED

LED連接到PD22(PWM7)腳位


GPIO位址


PD_CFG2


PD_DAT


main.s

    .global _start

    .equ GPIO_BASE, 0x02000000
    .equ PD_CFG2,   (GPIO_BASE + 0x98)
    .equ PD_DAT,    (GPIO_BASE + 0xa0)

    .arm
    .text
_start:
    .long 0xea000016
    .byte 'e', 'G', 'O', 'N', '.', 'B', 'T', '0'
    .long 0, __spl_size
    .byte 'S', 'P', 'L', 2
    .long 0, 0
    .long 0, 0, 0, 0, 0, 0, 0, 0
    .long 0, 0, 0, 0, 0, 0, 0, 0
     
_vector:
    b reset
    b .
    b .
    b .
    b .
    b .
    b .
    b .
     
reset:
    ldr r0, =PD_CFG2
    ldr r1, =0x01000000
    str r1, [r0]
 
    ldr r0, =PD_DAT
    ldr r1, =(1 << 22)
0:
    eor r2, r1
    str r2, [r0]
    ldr r3, =50000000
1:
    subs r3, #1
    bne 1b
    b 0b
    .end

main.ld

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

SECTIONS {
    text : {
        PROVIDE(__spl_start = .);
        *(.text*)
        PROVIDE(__spl_end = .);
    } > RAM
    PROVIDE(__spl_size = __spl_end - __spl_start);
}

Makefile

all:
	arm-linux-gnueabihf-as -mcpu=cortex-a7 -o main.o main.s
	arm-linux-gnueabihf-ld -T main.ld -o main.elf main.o
	arm-linux-gnueabihf-objcopy -O binary main.elf main.bin
	gcc mksunxi.c -o mksunxi
	./mksunxi main.bin

run:
	sudo xfel ddr t113-s3; sudo xfel write 0x40000000 main.bin; sudo xfel exec 0x40000000

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

連接芒果派MQ-R到PC(沒有焊接SPI Flash)後，執行如下步驟：

$ lsusb
    Bus 003 Device 021: ID 1f3a:efe8 Onda (unverified) V972 tablet in flashing mode

$ make
    arm-linux-gnueabihf-as -mcpu=cortex-a7 -o main.o main.s
    arm-linux-gnueabihf-ld -T main.ld -o main.elf main.o
    arm-linux-gnueabihf-objcopy -O binary main.elf main.bin
    gcc mksunxi.c -o mksunxi
    ./mksunxi main.bin
    The bootloader head has been fixed, spl size is 512 bytes.

$ make run
    sudo xfel ddr t113-s3; sudo xfel write 0x40000000 main.bin; sudo xfel exec 0x40000000
    Initial ddr controller succeeded
    100% [================================================] 512.000 B, 337.380 KB/s

完成