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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

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  • 0

    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?

  • 0 in reply to Susheel Nuguru

    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.

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  • 0 in reply to Susheel Nuguru

    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.

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