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  • Case ID: 295929
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UART_INIT causing no RTT LOG output

JGusler

Custom board using BL654 (NRF52840)

SDK 17.1.0

SD140 7.2.0

I was able to run the ble_app_uart totally successfully (with RTT LOG output) until I tried to add uart capability. Now I get no output at all on RTT viewer (before I did), and when on the debugger, it crashes before the first function call in main saying unknown function at 0x00000A60. The uart is connected to a peripheral and is only supposed to fetch data for processing, not redirected to bluetooth or anything.

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  • 0

    Hi there,

    Can you build the project in debug mode, re-flash your board and share the entire error message? If you're using SES:

    Also, please specify what modifications you added to the example?

    regards
    Jared 

  • 0 in reply to Jared

    Neither debug nor release get me any RTT output on the JLink RTT viewer now. In SES's debugger, the issue only comes up in Release, not Debug build. THe only message at all that I get is "Unknown function at 0x00000A60" which occurs right after I hit resume after the debugger pauses at main

    As for modifications, Ive redone the entire UART section to NOT pass through to bluetooth, I've changed the NRF_LOG to be RTT output (if that wasn't the default), and I'm using a custom board. I can attach some files like the sdk_config and main if you'd like.

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  • 0 in reply to Jared

    Neither debug nor release get me any RTT output on the JLink RTT viewer now. In SES's debugger, the issue only comes up in Release, not Debug build. THe only message at all that I get is "Unknown function at 0x00000A60" which occurs right after I hit resume after the debugger pauses at main

    As for modifications, Ive redone the entire UART section to NOT pass through to bluetooth, I've changed the NRF_LOG to be RTT output (if that wasn't the default), and I'm using a custom board. I can attach some files like the sdk_config and main if you'd like.

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