GD32F103: Failed to unlock flash, flash_loader.c: write error

[geocine]

Details

• [X ] I made serious effort to avoid creating duplicate or nearly similar issue
• Programmer/board type: Stlink v2 Clone
• Operating system and version: MacOS
• Stlink tools version and/or git commit hash: 1.6.1
• Stlink commandline tool name: st-flash
• Target chip (and board if applicable): GD32F103

  Found 1 stlink programmers
  serial:     0a240f002b135937334d4e00
  hla-serial: "\x0a\x24\x0f\x00\x2b\x13\x59\x37\x33\x4d\x4e\x00"
  flash:      1064960 (pagesize: 1024)
  sram:       20480
  chipid:     0x0410
  descr:      F1xx Medium-density
  

Description

1. Unlock using open-ocd
2. flash generic_boot20_pc13.bin it was ok but I was not able to enter bootloader mode.
3. flash naze32_boot20.bin it was ok but I was not able to enter bootloader mode.
4. flash gd32f1_generic_boot20_pc13.bin it was ok but I was not able to enter bootloader mode.
5. flash gd32f1_frankenmaple.bin it was ok but I was not able to enter bootloader mode.
6. flash #3 again , retrying but I cannot flash anymore with this error shown

   2020-12-22T22:07:26 WARN common.c: Failed to unlock flash!
   2020-12-22T22:07:26 ERROR flash_loader.c: write error, count == 3758157296
   2020-12-22T22:07:26 ERROR common.c: stlink_flash_loader_run(0x8000000) failed! == -1
   stlink_fwrite_flash() == -1

Commandline-Input:

st-flash write generic_boot20_pc13.bin 0x8000000

Commandline-Output:

st-flash 1.6.1
2020-12-22T22:07:26 INFO common.c: F1xx Medium-density: 20 KiB SRAM, 1040 KiB flash in at least 1 KiB pages.
file generic_boot20_pc13.bin md5 checksum: 333c30605e739ce9bedee5999fdaf81b, stlink checksum: 0x0008e534
2020-12-22T22:07:26 INFO common.c: Attempting to write 7172 (0x1c04) bytes to stm32 address: 134217728 (0x8000000)
2020-12-22T22:07:26 INFO common.c: Flash page at addr: 0x08000000 erased
2020-12-22T22:07:26 WARN common.c: Failed to unlock flash!
2020-12-22T22:07:26 INFO common.c: Flash page at addr: 0x08000400 erased
2020-12-22T22:07:26 WARN common.c: Failed to unlock flash!
2020-12-22T22:07:26 INFO common.c: Flash page at addr: 0x08000800 erased
2020-12-22T22:07:26 WARN common.c: Failed to unlock flash!
2020-12-22T22:07:26 INFO common.c: Flash page at addr: 0x08000c00 erased
2020-12-22T22:07:26 WARN common.c: Failed to unlock flash!
2020-12-22T22:07:26 INFO common.c: Flash page at addr: 0x08001000 erased
2020-12-22T22:07:26 WARN common.c: Failed to unlock flash!
2020-12-22T22:07:26 INFO common.c: Flash page at addr: 0x08001400 erased
2020-12-22T22:07:26 WARN common.c: Failed to unlock flash!
2020-12-22T22:07:26 INFO common.c: Flash page at addr: 0x08001800 erased
2020-12-22T22:07:26 WARN common.c: Failed to unlock flash!
2020-12-22T22:07:26 INFO common.c: Flash page at addr: 0x08001c00 erased
2020-12-22T22:07:26 INFO common.c: Finished erasing 8 pages of 1024 (0x400) bytes
2020-12-22T22:07:26 INFO common.c: Starting Flash write for VL/F0/F3/F1_XL core id
2020-12-22T22:07:26 INFO flash_loader.c: Successfully loaded flash loader in sram
2020-12-22T22:07:26 WARN common.c: Failed to unlock flash!
2020-12-22T22:07:26 ERROR flash_loader.c: write error, count == 3758157296
2020-12-22T22:07:26 ERROR common.c: stlink_flash_loader_run(0x8000000) failed! == -1
stlink_fwrite_flash() == -1

Expected/description:

I expect that it should be able to flash

What I've tried so far

1. Unlock again using open-ocd
   Command

   openocd -f interface/stlink-v2.cfg \ 
    -f target/stm32f1x.cfg \
    -c "init; reset halt; stm32f1x unlock 0; reset halt; exit"

   Output

   Open On-Chip Debugger 0.10.0
   Licensed under GNU GPL v2
   For bug reports, read
       http://openocd.org/doc/doxygen/bugs.html
   Info : auto-selecting first available session transport "hla_swd". To override use 'transport select <transport>'.
   Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
   adapter speed: 1000 kHz
   adapter_nsrst_delay: 100
   none separate
   Info : Unable to match requested speed 1000 kHz, using 950 kHz
   Info : Unable to match requested speed 1000 kHz, using 950 kHz
   Info : clock speed 950 kHz
   Info : STLINK v2 JTAG v31 API v2 SWIM v7 VID 0x0483 PID 0x3748
   Info : using stlink api v2
   Info : Target voltage: 3.222134
   Info : stm32f1x.cpu: hardware has 6 breakpoints, 4 watchpoints
   target halted due to debug-request, current mode: Thread
   xPSR: 0x01000000 pc: 0x080000f0 msp: 0x20002800
   Info : device id = 0x13030410
   Info : flash size = 128kbytes
   target halted due to breakpoint, current mode: Thread
   xPSR: 0x61000000 pc: 0x2000003a msp: 0x20002800
   stm32x unlocked.
   INFO: a reset or power cycle is required for the new settings to take effect.
   target halted due to debug-request, current mode: Thread
   xPSR: 0x01000000 pc: 0x080000f0 msp: 0x20002800
   

2. I tried to flash again, and still get the error above.

[Nightwalker-87]

Please also take note of #769 in this context.

[Ant-ON]

@geocine There is no need to unlock through OpenOСD. After resetting the microcontroller, the flash register lock appears again. I looked at the documentation for GD32F103. Unlocking is similar to STM32F103. st-flash must do it correctly.

Specifically, which microcontroller is used? In the OpenOCD logs, the size of the flash is detected as 128k, and st-flash is detected as 1024k.

ps I would recommend testing the flashing on the st-flash compiled from source of develop branch.

[geocine]

@Ant-ON thanks I have tried this version v1.6.1-199-g104940e and it is working perfectly. My microcontroller is GD32F103CBT6 . Thank you so much for the very quick response, I am closing this issue now.