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TMS320F28379D: CLB Counter Event Up/Down

Mark Ilg
Prodigy 110 points

Part Number: TMS320F28379D
Other Parts Discussed in Thread: SYSCONFIG

I'm trying to implement an additional QEP channel using the CLB and the first step is to determine if the counter supports Up and Down Counting using events?  I have the counter counting up using but I cannot seem to find the method for Up/Down using an Input.  I assume this can be done with a CLB_selectCounterInputs but prefer not having CPU intervention.

-Mark

  • 0
    TI__Expert 8105 points

    Mark,

    Yes, the CLB counters can count both up and down. To configure up or down please click on the counter element in sysconfig and look for the up/down count controls.

    Regards,
    Peter

  • 0 in reply to Peter Galicki
    Prodigy 110 points

    I'm aware of using the dialog to configure up/down mode however there is no interface to allow for the Mode Input to control direction in event mode.  My objective is to create a LUT to compute the direction and clock signals but there is no interface to allow for counters to be controlled via these inputs.  

  • 0 in reply to Mark Ilg
    TI__Expert 8105 points

    Mark,

    I am looking at COUNTER_0 in SysConfig. Mode1 determines whether the count us increment or decrement. When I click on mode1 I see many options that could become the sources. For example, if I select LUT_1.OUT, the output signal from LUT_1 will determine the up- or down- count in this COUNTER_0.

    Regards,
    PEter