nrf51822 Debug

RE: nrf51822 Debug

los — Mon, 30 Nov 2015 16:23:48 GMT

I got same problem. First I bit banged UART Tx using a timer. But when radio is active, you get a bad uart timing because of ble higher priority ITs. You will find code of this first version here :

github.com/.../5577588df9d7b418ea3ccfbf9ae2721766e69345

After, I used softdevice timeslot API with timer 0 to bit bang UART, you will find code here : github.com/.../AltSoftSerial I've tested it @9600bps

AltSoftSerial library is used on top of Arduino Core. You will find a full "nrf51 arduino application" using AltSoftSerial here :

github.com/.../nrf51_template_application

lah

RE: nrf51822 Debug

Vebjørn — Wed, 08 Apr 2015 09:24:55 GMT

As several others have posted, you can use a J-Link and the RTT feature.

See this tutorial for how to set it up

RE: nrf51822 Debug

Milan — Tue, 07 Apr 2015 09:11:18 GMT

Yup I think with s120 softdevice it is achievable !!

RE: nrf51822 Debug

Milan — Tue, 07 Apr 2015 09:10:25 GMT

Nice but this will add cost!

RE: nrf51822 Debug

Milan — Tue, 07 Apr 2015 09:09:47 GMT

I think two TX pin could serve, to transmit debug I may change the TX pin number and restore to normal to talk with the other device connected.

RE: nrf51822 Debug

Nick Pelis — Fri, 03 Apr 2015 18:27:25 GMT

If your only option for communicating with the other device is over serial, and if you also need a second UART into the Nordic part for debugging/validation/test/etc., one alternative is to use an I2C-to-UART bridge chip. NXP makes decent parts, check out this link.

RE: nrf51822 Debug

Nguyen Hoan Hoang — Fri, 03 Apr 2015 12:40:41 GMT

How about sending the debug print over BLE ? assuming BLE part is already functioning of course.

RE: nrf51822 Debug

Daniel Tralamazza — Fri, 03 Apr 2015 12:37:44 GMT

If you have a JLink I recommend using their RTT for debug logs.

RE: nrf51822 Debug

JohnBrown — Fri, 03 Apr 2015 11:19:25 GMT

You could bit-bang a UART, but probably not with the BLE stack running. You could also possibly use another output pin to select one of two possible routes for you serial data.

RE: nrf51822 Debug

Milan — Fri, 03 Apr 2015 05:53:04 GMT

Hi Team,

Is there any other option to have debug? Something like implementing UART on normal GPIO pins? Or any other idea.

RE: nrf51822 Debug

Milan — Thu, 02 Apr 2015 09:18:47 GMT

I have access of SWD interface but I don't have UART for normal debugging without J-Link.

RE: nrf51822 Debug

Milan — Thu, 02 Apr 2015 09:16:56 GMT

Yes, I am planning to make a board for my application with nRF51822 SoC. I am worried that I won't have UART for debugging as UART is already busy communicating with other device.

Any Idea on this?

RE: nrf51822 Debug

Vebjørn — Wed, 01 Apr 2015 11:15:48 GMT

Is it a custom board? Which pins do you have access to?

RE: nrf51822 Debug

Nguyen Hoan Hoang — Tue, 31 Mar 2015 14:18:10 GMT

Do you have access to the SWD interface pins ? You use the SWD interface with a Jtag tool such as J-Link or CMSIS-DAP for Flashing & debugging.