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External RESET for ControlCards (TMS320F28335)

Arsen Norman
Intellectual 460 points

Other Parts Discussed in Thread: TMS320F28335

Hi All,

Is there a way to add an external reset line from docking station to the TMS320F28335 ControlCard? Cycling power with toggle switch does not do the trick, since it also powers off the FTDI circuit on the docking station, and my only way to know that MCU has booted up is a welcome string through RS232 port. I am using dual RS232 solution for experimenter kit I found in this site.

 

Pin 16 on the 100 pin edge connector is not used neither on TMS320F28335 ControlCard nor on Docking Station. Here is a quick solution...

      

And a P/B switch on the Docking station from J1-16 to the GND.

  • 0
    TI__Guru 57255 points

    Arsen,

    Unfortunately, reset is not sent through the DIM100 header to the main board).  Based on the schematics for the F28335 controlCARDs, you could use a flying lead attached to C34 to get at the reset pin.  One side of C34 will be connected to GND, the other to Reset, so use a multimeter to determine which is which. 

    Alternatively, what I've always done is have a pin toggle an LED on and off.  GPIO-29 or GPIO-34 on the controlCARDs work well for this.  The blinking would help me determine if my boot sequence is happening or not.  This may be something to try unless you need all your GPIOs.


    Thank you,
    Brett