(ARM Cortex-A7) 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

OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(_start)

MEMORY {
  ram : ORIGIN = 0x00000000, LENGTH = 128M
}

SECTIONS {
  .text :
  {
    PROVIDE(__spl_start = .);
    *(.text*)
    PROVIDE(__spl_end = .);
    *(.init.text)
    *(.exit.text)
    *(.glue*)
    *(.note.gnu.build-id)
  } > ram
  PROVIDE(__spl_size = __spl_end - __spl_start);

  .rodata ALIGN(8) :
  {
    PROVIDE(__rodata_start = .);
    *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
    PROVIDE(__rodata_end = .);
  } > ram

  .data ALIGN(8) :
  {
    PROVIDE(__data_start = .);  
    *(.data*)
    . = ALIGN(8);
      PROVIDE(__data_end = .);
    PROVIDE(__image_end = .);
  } > ram

  .bss ALIGN(8) (NOLOAD) :
  {
    PROVIDE(__bss_start = .);
    *(.bss*)
    *(.sbss*)
    *(COMMON)
    . = ALIGN(8);
    PROVIDE(__bss_end = .);
  } > ram

  .stab 0 : { *(.stab) }
  .stabstr 0 : { *(.stabstr) }
  .stab.excl 0 : { *(.stab.excl) }
  .stab.exclstr 0 : { *(.stab.exclstr) }
  .stab.index 0 : { *(.stab.index) }
  .stab.indexstr 0 : { *(.stab.indexstr) }
  .comment 0 : { *(.comment) }
  .debug_abbrev 0 : { *(.debug_abbrev) }
  .debug_info 0 : { *(.debug_info) }
  .debug_line 0 : { *(.debug_line) }
  .debug_pubnames 0 : { *(.debug_pubnames) }
  .debug_aranges 0 : { *(.debug_aranges) }
}

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

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