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EZDSP TMS320F28335 ADC SOC example help

Alex Yeo
Prodigy 20 points

Other Parts Discussed in Thread: TMS320F28335, CONTROLSUITE

Hi, 

I am currently working on EZDSP TMS320F28335 and i new to this device,  i've downloaded the ADC SOC example from resource explorer. 

After compiling and loaded into the board, i couldnt get any readings from the programme. 

Hence, can anyone teach me how i should check that the programme is working fine with my board? 

Like a step by step instructions on how to work the ADC of the F28335 chip and what connection i should make. THANKS!

  • 0
    TI__Guru 60865 points

    Hi Alex,

    I would definitely recommend getting some more examples from ControlSUITE.

    Another good resource might be the Delfino Multi-Day Workshop at the below link.  I don't think this uses the EZDSP, but should give a good idea of how to use the device (note: you can find all the schematics for the ControlCARD used in the training in ControlSUITE). 

    processors.wiki.ti.com/.../C2000_Archived_Workshops

  • 0 in reply to Devin Cottier
    Prodigy 20 points

    Hi Devin,

    Thanks for the reference. however, could you please advice on how do i test the ADC after i have run the codes?

    Thanks!!

  • 0 in reply to Alex Yeo
    TI__Guru 60865 points
    Hi Alex,

    A first level functionality check would be to use a function generator to generate a DC voltage inside the ADC range (0 to 3V) and then connect this to one of the ADC pins. Use the example software to sample the voltage on this pin and then compare the ADC result register value to the ideal conversion result, which should be (Vin/3.0V)*4095. If this single voltage conversion is ok, then try different voltages (no SW changes required) and different pins (requires a SW change) to see if those work too.