T48: Difference between revisions
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boot to high pin => seems to enable USB even with SWD plugged in | boot to high pin => seems to enable USB even with SWD plugged in | ||
What exactly is this? | |||
ID 4348:55e0 WinChipHead | |||
I think this is WchLink built into chip? | |||
Revision as of 06:05, 21 December 2022
WCH-link
Debug header
- BO
- 94 BOOT0
- 3V3
- no 3.3V on PCB. I guess connect to WCH-Link 3V3?
- SWDCLK
- PA14/SWCLK
- SWDIO
- PA13/SWDIO
- ground
- BOOT
- U5 pin 4
- SM16306SJ
- https://www.lcsc.com/product-detail/LED-Drivers_Shenzhen-Sunmoon-Micro-SM16306S_C2830324.html
- 4 => LE
- BOOT1?
boot to high pin => seems to enable USB even with SWD plugged in
What exactly is this?
ID 4348:55e0 WinChipHead
I think this is WchLink built into chip?
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