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control C674x dsp from external device

Ankur
Prodigy 165 points


HI 

 

Can is be possible to control C6745 dsp from external device using I2C/SPI/UART/EMIF as HPI is not available in C6745 dsp,if yes, can u provide some details on it Thanks in advance

  • 0
    TI__Genius 14545 points

    Ankur,

     

       Yes this is possible. If you can provide details on which communications method you plan to you we can provide some additional details.

  • 0 in reply to dabuan
    Prodigy 165 points

    HI Drew,

    Thanks for your reply,

    I need to control c6745 using PIC32 uP  where PIC32 will be used for User interface Like LCD,Touch screen etc and c6745 DSP will be doing Mp3/acc decoder and other post processing of audio signal.

    Can you give me some examples  for controlling dsp?

    also suggest me which interface (I2C/SPI/UART/EMIF) will faster as i need to transfer Mp3 bit stream from MMC/SD(PIC32) to MP2 decoder algorithm  implemented in DSP

     

    Regards,

    Ankur

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  • 0 in reply to Ankur
    TI__Genius 14545 points
    Anker, I'm not sure you'd want to send audio via either one of the above interfaces, but rather use either the McBSP, or the McASP of the device since they are specifically designed to handle audio applications. Of course, this assumes that the PIC32 has some sort of similar interface. Additionally, you might want to simply send a message between the PIC32 to the C6745 to read directly from the memory card, vs streaming the data over a serial communication port. If you had to use one of the above interfaces, SPI would certainly be faster than I2C/UART.
  • 0 in reply to dabuan
    Prodigy 165 points

    Hi Drew,

    thanks for reply

    Drew Abuan said:
    Anker, I'm not sure you'd want to send audio via either one of the above interfaces, but rather use either the McBSP, or the McASP of the device since they are specifically designed to handle audio applications. Of course, this assumes that the PIC32 has some sort of similar interface. Additionally, you might want to simply send a message between the PIC32 to the C6745 to read directly from the memory card, vs streaming the data over a serial communication port. If you had to use one of the above interfaces, SPI would certainly be faster than I2C/UART.

    Can you give me some examples  for controlling dsp through SPI?

  • 0 in reply to Ankur
    TI__Genius 14545 points

    Do you plan to use a Real Time Operating System on top of the DSP? If so, there is a SPI example program in the Platform Support Package.

    I don't know of any packaged examples utilizing SPI to do DSP communication, however you can utilize the BIOS Drivers as an example of how to program the SPI peripheral on the C6745,

  • 0 in reply to dabuan
    Prodigy 165 points

    Drew Abuan said:

    Do you plan to use a Real Time Operating System on top of the DSP? If so, there is a SPI example program in the Platform Support Package.

    I don't know of any packaged examples utilizing SPI to do DSP communication, however you can utilize the BIOS Drivers as an example of how to program the SPI peripheral on the C6745,

     

    Thanks for your reply, i can use spi driver examples in PSP of c674x for controllling dsp

     

    one last query, can somebody give a example code for controlling any dsp(other than c6745) using SPI , it will help me understand the basic workflow for this