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TMS320F280049C: How to route PGA output to ADC input

Eric Jappe
Prodigy 60 points

Part Number: TMS320F280049C
Other Parts Discussed in Thread: SYSCONFIG

I am using CCS integrated SysConfig (v1.10.0.2163) to set up a PGA.

I created a PGA with PGA Instance PGA1.  SysConfig automatically assigned input pin #18, ground pin #14, and an Internal OUtput Pin A11/B7/PGA1_OUT

However, I am unsure how to route the interal pin from the PGA to an ADC to acquire values.

Any advice would be greatly appreciated!

  • 0
    Prodigy 60 points

    More info regarding my questions:

    I tried to add an SOC to the ADC, but when I specify ADCIN11 as the input channel, it says "SOC11 Channel selected has no device pin found".  See attached screen shot. From what I understand, the output PGA1_OUT is on an internal pin in analog group A11, B7, PGA1_OUT.  I don't know why SysConfig is complaining about this since the documentation says no MUX of this signal is required.

  • +1 in reply to Eric Jappe
    TI__Mastermind 23671 points

    Hi Eric,

    Thanks for reaching out to us. I don't think your screenshot got attached, or at least I am not seeing it on my end. Nonetheless, I followed along with your description and understand what you're talking about. The notice that is displayed ("SOCxx Channel selected has no device pin found") is merely there to inform you that that specific ADC channel is not routed to an external pin on the device. You are free to suppress the warning. You can instead read the value on the channel using ADC_readResult.

    Regards,

    Peter

  • 0 in reply to Peter Luong
    Prodigy 60 points

    Thank you Peter!  I wanted to make sure I was not doing something wrong.