T48: Difference between revisions
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| Line 4: | Line 4: | ||
# BO | # BO | ||
# 3V3 | # 3V3 | ||
** no 3.3V on PCB. I guess connect to WCH-Link 3V3? | |||
# SWDCLK | # SWDCLK | ||
# SWDIO | # SWDIO | ||
# ground | # ground | ||
# BOOT | # BOOT | ||
** BOOT1? | |||
Revision as of 06:01, 21 December 2022
WCH-link
Debug header
- BO
- 3V3
- no 3.3V on PCB. I guess connect to WCH-Link 3V3?
- SWDCLK
- SWDIO
- ground
- BOOT
- BOOT1?
Package pin assignment
- PA13/SWDIO
- PA14/SWCLK
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