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Thread: XMC4300 Onchip Temperature

  1. #1
    Beginner Beginner Tobi is on a distinguished road Tobi's Avatar
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    XMC4300 Onchip Temperature

    Hello people of the Forum,
    I need help once again. I want to read the Onchip Temperature of the XMC4300 Relax Board, but it doesnt work.
    Infineon has an document for the XMC1000 descirbing this procedure

    https://www.infineon.com/dgdl/Infine...531c6aadc94791

    .... BUT: For XMC4300 it doesnt work.

    I include "xmc_scu.h" in my Code but in this File there isnt a function called XMC_SCU_CalcTemperature().
    In my Code I do XMC_SCU_StartTemperatureMeasurement() and after that I do XMC_SCU_GetTemperatureMeasurement(). But this only return 0.

    --> How is the reading of the Temperature on XMC4300 working?? It couldnt be that hard and I cant be the only one, who has a problem with it.

  2. #2
    Beginner Beginner Tobi is on a distinguished road Tobi's Avatar
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    Are there no Infineon specialists in the Forum who can help me with this seemingly easy thing???

  3. #3
    Beginner Beginner Tobi is on a distinguished road Tobi's Avatar
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    Ok the Infineon Support sent me the following (what worked for me so far):

    #include <xmc_scu.h>

    volatile uint32_t temperature;

    int main(void)
    {
    XMC_SCU_EnableTemperatureSensor();

    // Ignore first measurement
    XMC_SCU_StartTemperatureMeasurement();
    while (XMC_SCU_IsTemperatureSensorBusy());
    temperature = XMC_SCU_GetTemperatureMeasurement();

    /* Placeholder for user application code. The while loop below can be replaced with user application code. */
    while(1U)
    {
    XMC_SCU_StartTemperatureMeasurement();
    while (XMC_SCU_IsTemperatureSensorBusy());
    temperature = XMC_SCU_GetTemperatureMeasurement();
    }
    }


    Leasons learned:
    - XMC_SCU_EnableTemperatureSensor() one time at first
    - poll on: XMC_SCU_IsTemperatureSensorBusy
    - forget the first measurement


    Additional:
    if you want C you have to do:
    temperature = (XMC_SCU_GetTemperatureMeasurement()-605)/2.05;


    Thanks to Infineon Techies for help and myself for posting the solution on the Forum...

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