Options for flashing nrf9151 with production firmware without J-link.

[Joe01]

Hi all,

I've built a custom nRF9151 board, which is successfully responding to the basic factory AT commands. It won't accept a CFUN=1 command though, presumably because it's still loaded with the factory firmware. 

I've only got access to a PicoProbe at the moment, which has worked great for flashing application programs over SWD, but I'm now trying to change the modem firmware to the production version and I can't find any way to do this without MCUBoot or a J-Link adapter. 

Do I have any options other than buying a J-Link Edu Mini? 

Thanks!

[Simon D-M]

Hi,

I've only got access to a PicoProbe at the moment, which has worked great for flashing application programs over SWD, but I'm now trying to change the modem firmware to the production version and I can't find any way to do this without MCUBoot or a J-Link adapter. 

Do I have any options other than buying a J-Link Edu Mini? 

Theoretically, the nRF9151 modem firmware only needs a SWD connection to be updated. I'm not sure how much our tools support non-jlink debugger though. I'll ask internally and get you back on that.

Also, If you already have one of our Dev Kit, you can use its on-board debugger to connect to other boards. You can use the "DEBUG OUT" port with a JTAG 10 pins cable (or on some of them you also have a normal 2.54mm pin header that has the pin exposed).

I've built a custom nRF9151 board, which is successfully responding to the basic factory AT commands. It won't accept a CFUN=1 command though, presumably because it's still loaded with the factory firmware. 

Out of curiosity, what modem firmware do you have on your chip? You can check using the AT+CGMR command.

Best regards,

Simon D-M