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LAUNCHXL-F28379D: Problem with LAUNCHXL-F28379D

SALAH SALEM
Prodigy 75 points

Part Number: LAUNCHXL-F28379D

Hello
I am trying to send pulses to the gate driver  BY F28379D microcontroller, when I am press RUN I receive this error
THIS problem happens with frequency 100KhZ and above and with 50HZ and 50 kHZ working without problem.
*** Connecting to target... *** Loading the program to the target... *** Program is running. *** Disconnecting from target... *** Terminating debug session... *** LOAD & RUN DONE. ### Successful completion of build procedure for: FIivelevelHigeFrequency100khz ### Simulink cache artifacts for 'FIivelevelHigeFrequency100khz' were created in 'C:\Users\User\Desktop\salah\FIivelevelHigeFrequency100khz.slxc'.
Build process completed successfully
action: EXT_CONNECT
Component:Simulink | Category:Model
Error occurred while executing External Mode MEX-file 'ext_comm': Failed to connect to the target. A time-out occurred while waiting for the connection response from the target. Possible reasons for the time-out:
a) The target is not switched on.
b) The target is not connected to your host machine.
c) The application for the model is not running on the target. You might have clicked the Stop button. If the Run button is not dimmed, click it. Otherwise, click the Build button, which downloads and runs your application on the target.
Component:Simulink | Category:Block diagram error
Unable to connect to the 'TI Delfino F28379D LaunchPad' target for
THIS problem happens with frequency 100KhZ and above and with 50HZ and 50 kHz working without problem.
Could anyone help me, please
NOTE: I am using  GPIO block  
Thanks
  • 0 in reply to SALAH SALEM
    Prodigy 75 points

    no  helping  yet

  • 0 in reply to SALAH SALEM
    TI__Guru* 86040 points

    Salah,

    If you are seeing a connection issue when the switching frequency is above a certain threshold, then the likely issue is noise from the switching FET is causing signal integrity issues on the JTAG/LAUNCH Pad. 

    When this happens, do you only see a loss of JTAG connection, or does the device stop working as well?

    If you can monitor the JTAG signals or power/ground during switching with a scope we may be able to see the noise and its amplitude.

    There are some settings inside CCS to slow down the JTAG connection speed, but if the noise is large these likely won't help.

    Another possibility is trying to shield the area of the PCB so that the switching noise doesn't have as much impact.  Or if possible get the switches farther away from the LAUNCHXL if possible.

    Let me know what you find.

    Best,

    Matthew