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Thread: [SOLVED] Emo_HandleFoc() function timing issue

  1. #1
    Beginner Beginner atozall24 is on a distinguished road
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    [SOLVED] Emo_HandleFoc() function timing issue

    Hi,

    I have an issue with unwanted time for Emo_HandleFoc() interrupt.
    It is executed at every 100usec.

    If I execute only port toggle in the Emo_HandleFoc function by return statement as below picture then it is executed at every 50usec normally.
    I am using TLE9871QXA20(24Mhz) for motor FOC control (based on TLE9879 software package)

    The TLE9879QXA40(40Mhz) MCU is no problem

    Is there any special reason for delay time at TLE9871(like as MCU performance)?

    Please help this issue.

    Click image for larger version

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    Last edited by atozall24; May 8th, 2019 at 08:44 PM.

  2. #2
    Intermediate Intermediate
    Infineon Employee
    Infineon Employee
    pestadieu is on a distinguished road
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    Dear atozall24,

    This is indeed due to MCU performance.

    The interrupt trigger happens every 50us. However, when the clock is 24MHz, the time required to do the FOC calculation exceeds 50us and the interrupt trigger is missed.
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

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