darkxst
commented
1 year ago If you flashed the router firmware then auto-BSL (software activation of bootloader) no longer works and you need to use the physical boot button to activate Gecko.
Open maciekb opened 1 year ago
darkxst
commented
1 year ago If you flashed the router firmware then auto-BSL (software activation of bootloader) no longer works and you need to use the physical boot button to activate Gecko.
Hedda
commented
1 year ago Is it possible to program the bootloader using GPIO pins?
I believe it should is also possible to recover a Silicon Labs EFR32 based adapters with a bricked bootloader by flashing via the JTAG (or cJTAG?) interface via Silabs Simplicity Commander by using a compatible JTAG debug probe programmer / flasher via the TCK, TMS, RESET, and GND pads on the board, (as well as 3V / 3-Volt for power but be sure not to connect to USB at the same time), using for example the SEGGER J-Link (jlink) Debug Probes such as their "J-Link EDU Mini" https://wiki.segger.com/Debug_Probes_-_J-Link_%26_J-Trace
The debug header on ZBDongle-E look to only expose TMS/TCK as debug interface and not TDI/TDO (which is usually also needed for npormal JTAG) so as such a c/JTAG (cJTAG IEEE 1149.7) compatible debug adapter is needed instead of a common JTAG probe? -> https://electrolama.com/radio-docs/advanced/flash-jtag/
https://jethome.ru/wiki/howto/instrukciya-po-proshivke-mikrokontrollerov-efr32mg21/
https://www.silabs.com/developers/mcu-programming-options
https://www.silabs.com/documents/public/application-notes/AN136-production-programming-options.pdf
https://www.silabs.com/documents/public/application-notes/an105.pdf
alienatedsec
commented
1 year ago What are you calling a damaged bootloader?
I see the below and I am not sure where is the problem
no matter what is pressed
Any ideas or other tools to recommend? Please SecureCRT seems to be a no-go.
alienatedsec
commented
1 year ago Messed about and found the right settings - speed was at 9600 instead of 115200:
During the programming of the device, the bootloader was probably damaged. The device is recognized correctly in the system, but the bootloader does not present itself, and it is currently impossible to program with standard tools. Is it possible to program the bootloader using GPIO pins?