微處理器 - Allwinner F1C200S (Tiny200) - Assembly - LED

參考資料：
http://nano.lichee.pro/
https://mangopi.org/mangopi_r

暫存器


配置功能


輸出控制


main.s

    .global _start

    .equiv GPIO_BASE, 0x01c20800
    .equiv PA,        (0 * 0x24)
    .equiv PORT_CFG0, 0x00
    .equiv PORT_DATA, 0x10

    .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, =GPIO_BASE
    ldr r1, =0x1000
    str r1, [r0, #(PA + PORT_CFG0)]
 
0:
    ldr r1, =0x08
    str r1, [r0, #(PA + PORT_DATA)]
    ldr r2, =500000
1:
    subs r2, #1
    bne 1b
    ldr r1, =0x00
    str r1, [r0, #(PA + PORT_DATA)]
    ldr r2, =500000
2:
    subs r2, #1
    bne 2b
    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-none-eabi-as -mcpu=arm9 -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
	gcc mksunxi.c -o mksunxi
	./mksunxi main.bin

run:
	sunxi-fel -p write 0 main.bin && sunxi-fel exec 0

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

接著插入USB至電腦，然後按住BOOT按鍵後，再按一下RESET按鍵(如果NAND Flash是空白的內容，直接插入USB即可進入燒錄模式)

$ lsusb
    Bus 002 Device 081: ID 1f3a:efe8 Onda (unverified) V972 tablet in flashing mode

編譯、執行

$ make
    arm-none-eabi-as -mcpu=arm9 -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
    gcc mksunxi.c -o mksunxi
    ./mksunxi main.bin
    The bootloader head has been fixed, spl size is 512 bytes.

$ make run
    sunxi-fel -p write 0 main.bin && sunxi-fel exec 0
    100% [================================================]     1 kB,  143.5 kB/s

完成