• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 82 subscribers
  • Views 564 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CCS/SFRA: Hi, guys, I wander the communication mechanism of the DSP and SFRA software.

Mark_Lu
Prodigy 180 points
Part Number: SFRA

Tool/software: Code Composer Studio

Hi, guys, I wander the communication mechanism of the DSP and SFRA software. there are my question below.

1. how can we confirm the inject signal is sine wave range with several Hz to several KHz? how did it can be compute to be sine?

2. when I use the SFRA software to communicate with DSP through by the SCI method, and I know it use the document name "SciCommsGui_32bit.c",

and my question is would you give me something about what is SCI data format communicate with each other? for example, when I click the "Start sweep" button, the SFRA send the data format is "200000" , I think I need a list of the data format to figure out how is it work.

in my opinion, if we can't figure out how does it work out for the Frequent respond analysis, we didn't use it to our product to measure our system.

thanks, 

  • 0
    TI__Mastermind 43730 points
    Mark,

    1. The mechanics of SFRA are not disclosed due to IP reasons.

    2. The communication protocol is not well documented, and I myself do not know all the workings. I will suggest you create your own GUI if you want to use SFRA with your own protocol. The SFRA gui and lib are independent. i.e. you can remove support for the GUI and still use SFRA lib and write your own GUI protocol.

    Regards
    Manish
  • 0 in reply to Manish Bhardwaj
    Prodigy 180 points

    Manish,

    I understand what you said. and I can use the oscilloscope to check the output wave. But how can I check if the input wave is various sine wave?   

    Thanks.

  • 0 in reply to Mark_Lu
    TI__Mastermind 43730 points

    You can output the injected signal on a DAC pin and see the variation on the scope.

    Alternatively, we do offer a software test bench to validate the functionality of the SFRA, steps are provided in the UG. Most external FRAs are also calibrated against a filter which this STB does.