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TMS320F280025C: I cannot read data from sci-tx port

Kemal Çağan Taş
Prodigy 30 points
Part Number: TMS320F280025C
Other Parts Discussed in Thread: LAUNCHXL-F280025C, C2000WARE

I have a simulink model for a power electronics project and i want to see detailed data using SCI-TX port in simulink. For this, i have created 2 codes, one is for code generation and the other one is for watching the data. Both of the codes work without a problem in LAUNCHXL-F280025C. The default pins are GPIO28 and GPIO29 for TX and RX, and when i want to change these pins, using the hardware switch at the launchpad also creates no problem and i am able to also use GPIO16 and GPIO17 pins. Hovewer, using the TMS320F280025CPNSR (this processor is used in my project card), i cannot get the data interface to work in any ways. The pins are selected as GPIO16 and GPIO17 in project card. In summary, with the launchpad, i am able to see the data on sci pins, but the same codes do not work for the control card (i change the build configurations to TI F28002x.) I have tried lots of methods, i tried GPIO2 and GPIO3 pins instead, didnt work. I even tried to change the value for OUTPUTXBAR7 to SCI-TX(6) but this didnt work either. Even this simple code where i read adc values and send it to serial pin does not send any data to my SCI-TX pin.(The codes themselves work but i do not see any data in model.) The only difference is that the FTDI we use is XDS100, but i have seen this card being used without any problem in other projects ( for example 49c.) The pins do not have a physical connection problem, as we tested them with a multimeter. I dont have any ideas left, any suggestions?

  • 0
    TI__Mastermind 28300 points

    Hi Kemal,

    Is the SCI module on the F28002 device communicating with your PC?

    If you run an SCI example on the control card, do you see any transmission on the SCI TX line on your scope, or do you get no output at all?

    Thank you,

    Luke

  • 0 in reply to Luke Jones
    Prodigy 30 points

    Hello Luke,

    After your message i ran some tests. I have found interesting results. I ran the sample sci code and my normal code on controlcard. The signals without noise came from controlcard, and i was able to see these signals using the TX pin on hardware.(GPIO16) Hovewer, it seems that the data is not being sent to pc, as i was not able to see any data in my interface model and putty application. The signal with noise comes from launchpad, but i am able to correctly read the data from my interface model.

  • 0 in reply to Kemal Çağan Taş
    TI__Mastermind 28300 points

    Hi Kemal,

    I will be out of office today, I will respond back by tomorrow.

    Thank you,

    Luke

  • 0 in reply to Luke Jones
    TI__Mastermind 28300 points

    Hi Kemal,

    To clarify, you're using an F28002x control card and the SCI communication is not working?

    Could you try importing and running the lab_sci_controlcard project from C2000Ware/training/device/f28002x/communication_peripherals/lab_sci and let me know if that works?

    Thank you,

    Luke