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    • Re: Printf via SWV doesn't print anything

    Posted by Guy on 2015-04-08 13:46

    Hello,

    to do the printf I used semihosting from https://github.com/justyn/semihosting-cortexm-uos
    I did minor modifications because the compiler complains but it works fine.
    In my code I have
    trace_printf(">>>>> AmbientT: %3.3f°C AmbientP: %4.1fhPa\n", oMeasure_AmbientTemperature.m_lTemperature/1000.0F,oMeasure_AmbientPressure.m_lPressure/100.0F );
    In the openocd console:
    >>>>> AmbientT: 27.114°C AmbientP: 1025.4hPa
    My configuration is STM32f429I-DISCO openstm321.1.0 and eCos as RTOS

    Reads: 6554
    Posted by Julien.Kern on 2015-04-09 10:08

    Hello,

    I've fixed my bug !
    Actually, in "system_stm32f10x.c", I uncommented "#define PLL_SOURCE_HSE" instead of "#define PLL_SOURCE_HSI" and now ITM_SendChar works properly ("printf()" still doesn't work however).

    Have a good day.

         Posted by roshkj on 2016-01-24 05:39

    Hi Julien,

    Could you please describe, how you implemented the ITM? What are the files you included? What are the functions that you used? and what softwared did you view the output in? was in the console of openOCD or ST utility? Could you please describe. That would be a lot helpful.

    Thank you

    Rosh