Nothing happens when I flash a firmware on a custom nrf51822 board

RE: Nothing happens when I flash a firmware on a custom nrf51822 board

moenad — Thu, 21 May 2015 10:06:22 GMT

Converted Nick's reply to an answer, it turned out SOFTDEVICE_HANDLER_INIT first parameter isn't correct for my case. no 32k crystal involved.

RE: Nothing happens when I flash a firmware on a custom nrf51822 board

Susheel Nuguru — Thu, 21 May 2015 09:12:59 GMT

Can you debug your application to see if it starts. I think your device is doing a softdevice at the very early stage of your application. It could be that you are trying to initialize the softdevice with LFCLK which you do not have on your board. Check this macro in your APP SOFTDEVICE_HANDLER_INIT

RE: Nothing happens when I flash a firmware on a custom nrf51822 board

Nick Pelis — Wed, 20 May 2015 18:07:52 GMT

If you didn't include a 32k crystal in your design, then the RC oscillator will probably work just fine for you instead.

As far as the JLinkARM DLL error, try disconnecting the external board and see if you still have the issue. Also make sure you have the latest JLink package from Segger's website. There are other solutions as well people have posted here...

RE: Nothing happens when I flash a firmware on a custom nrf51822 board

moenad — Wed, 20 May 2015 17:57:00 GMT

oh I see! The board I'm using has no 32k crystal, that might be the first problem? but I just notice something, I didn't know that you can use the nrfgo studio for external boards but I just checked and when I try to flash the softdevice, I get an error "An error condition was detected in the JLinkARM DLL"... strange, I'm not sure what to do..

RE: Nothing happens when I flash a firmware on a custom nrf51822 board

Nick Pelis — Wed, 20 May 2015 17:39:36 GMT

You might check that your call to SOFTDEVICE_HANDLER_APPSH_INIT (or SOFTDEVICE_HANDLER_INIT) matches reality. I ran into problems when trying to bring up our custom board because the stock example code--which worked on the nRF51 DK--made use of the 32k LFCLK crystal and our custom board did not have that component.

The other thing you might check in nRF Studio is that what the JLink device actually sees is your custom board and not the nRF51422 on the development board. It could be that this whole time there's been a connection issue between your custom board and the DK, and what you're actually flashing firmware to is the dev board, not the custom board.

Other than that, it's hard to say what's going on if you can't get a debugger attached.

RE: Nothing happens when I flash a firmware on a custom nrf51822 board

moenad — Wed, 20 May 2015 17:30:15 GMT

Yes, of course.

RE: Nothing happens when I flash a firmware on a custom nrf51822 board

Nick Pelis — Wed, 20 May 2015 16:43:18 GMT

Did you also flash the SoftDevice?