Old GPIOTE bug on softdevice S140 7.0.1

[rmarques]

Hello, I am using nRF52840, SDK v16.0, mesh SDK 4.2.0 and softdevice S140 7.0.1. I am following this example to experiment PA/LNA features, namely controlling the pins that enable TX and RX in a front-end radio amplifier.

What happens is that I am able to check pins of port 0 being switched on and switched off automatically by the softdevice, but when I try to use any pin from port 1, it does not work.

I found that this bug happened before and was fixed on softdevice 6.1.0 by reading the release notes, but I am worried that it is happening again on 7.0.1. Are you able to reproduce this bug using the light switch server project as in the example?

Thank you,

Rúben Marques

[Susheel Nuguru]

Hi, 

This is fixed in SD_140 v6.1.0 and have not heard or seen this problem in later softdevice. Can you attach your project so that i can try to replicate your problem on my desk?

[rmarques]

Hello, I am attaching the light switch example, modified as per the recommendations of this example.8231.light_switch.zip

I purposedly modified the project light_switch_server_nrf52840_xxAA_s140_7_0_1 in a clean SDK and Mesh SDK and tested this in a nRF52840 DK board to be sure everything was as vanilla as possible.

If I use pin 0.31 for TX and 0.30 for RX I get the following signals in the oscilloscope:

If I use pin 1.01 for TX and 1.03 for RX I get the following signals in the oscilloscope:

The module I am using that has PA/LNA has the pins in port 1 and not on port 0. I would like to not have to design my board with two wires connecting pins from port 0 to port 1, but I could do it as a last measure.

I also tried other pins on both port 0 and port 1 and the behaviour is the same. RX is never pulled up to 3V on port 1 pins after the periodic transmissions. This only works on pins of port 1.

[Susheel Nuguru]

Sorry for late response, i was on sick leave. I will take a look at it today, and if i can reproduce this with the softdevice you mentioned, then i need to contact the softdevice team to get more explanation on it.