Steward
分享是一種喜悅、更是一種幸福
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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | . 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