T48

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Revision as of 06:04, 21 December 2022 by Mcmaster (talk | contribs)
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WCH-link

Debug header

  1. BO
    • 94 BOOT0
  2. 3V3
    • no 3.3V on PCB. I guess connect to WCH-Link 3V3?
  3. SWDCLK
    • PA14/SWCLK
  4. SWDIO
    • PA13/SWDIO
  5. ground
  6. BOOT


boot to high pin => seems to enable USB even with SWD plugged in


Unbrick

In theory we have all firmware (system ROM, bootloader, main firmware) and should be able to unbrick devices. However, I was unable to restore my devices

Theory: unrick issue is firmware is not at correct .hex location. Things that didn't seem to work to get firmware .hex file:

 objcopy --input-target=binary --output-target=ihex --set-start 0x08000000 t48_bootrom_2022-06-30.bin t48_bootrom_2022-06-30.hex
 objcopy --input-target=binary --output-target=ihex --change-addresses 0x08000000 t48_bootrom_2022-06-30.bin t48_bootrom_2022-06-30.hex  
 objcopy --input-target=binary --output-target=ihex t48_bootrom_2022-06-30.bin temp.hex
 objcopy --change-addresses 0x08000000 temp.hex t48_bootrom_2022-06-30.hex