F1C100S

如何使用J-Link GDB Server和IDA Pro除錯程式

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參考資訊：
1. jtag_pdf
2. whycan_jtag
3. whycan_pinout
4. jtag_allwinner_f1c100s.cfg

F1C100S JTAG腳位(和MicroSD共用腳位)

TMS	PF0, SDC0_D1
TDI	PF1, SDC0_D0
TDO	PF3, SDC0_CMD
TCK	PF5, SDC0_D2

連接J-Link


main.s

  .global _start
  
  .equ GPIO_BASE, 0x01c20800 
  .equ PE_CFG0,   (GPIO_BASE + (4 * 0x24) + 0x00)
  .equ PE_DATA,   (GPIO_BASE + (4 * 0x24) + 0x10)
   
  .arm
  .text
_start:    b reset
_undef:    b .
_swi:      b .
_pabort:   b .
_dabort:   b .
_reserved: b .
_irq:      b .
_fiq:      b .

reset:
  ldr r0, =PE_CFG0
  ldr r1, =0x00010000
  str r1, [r0]
 
  ldr r0, =PE_DATA
0:
  eor r1, #0x10
  str r1, [r0]
  b 0b
  .end

main.ld

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

SECTIONS {
  text : {
    *(.text*)
  } > ram
}

編譯

$ 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

下載程式到RAM(loadbin c:\main.bin 0)


開啟J-Link GDB Server(Init registers記得勾選)


選擇ARM 9


Listening on TCP/IP port 2331


IDA Pro載入main.bin


按下F9，選擇Remote GDB debugger


按下F9，輸入localhost 2331


接著就可以開始除錯程式

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