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TMS320C6671: E1/T1 with HPI to DSP

Shay Mor
Intellectual 870 points
Part Number: TMS320C6671

Hi,

How can I connect E1/T1 with HPI interface to TMS320C6671?

  • 0
    Guru 13042 points

    Hello!

    I believe no one of C667x family has HPI interface as it was in C64x family, that if we speak of HPI as of Host Port Interface of the past. There might be some HPI on your T1/E1 side, but that is out of my knowledge either way.

    Next, considering interconnect of E1/T1 with DSP, there should be some kind of data format conversion device, which would match interfaces on DSP side. One thing which comes to my mind is E1/T1 to Ethernet conversion, because DSP has networking part. Alternatively one may consider doing E1/T1 framing/deframing by themselves in say, FPGA, then FPGA might be connected to DSP through PCie.

    Hope this helps.

  • 0 in reply to Victor Kazmirenko
    Intellectual 870 points

    Thanks for the detailed answer!

    True, I have an old HPI interface in an E1/T1 frame and I need to be connected between the E1/T1, CPU and TMS320C6671 DSP.

    I can connect between the DSP to CPU by ETH or PCIe, do you think it is possible to convert the HPI to SPI by FPGA (for the CPU)?

    If yes, what is the speed of the SPI need to be?

    I will of course consider converting the HPI by the FPGA to ETH as you suggest, but do you know of such a downloadable FPGA driver?

    Can you suggest an existing circuit that converts HPI to ETH?

  • 0 in reply to Shay Mor
    Guru 13042 points

    Hello!

    The only HPI I am familiar with is host port interface of C64x family. The one you are referring on t1/E1 side is unknown to me.

    Considering the data rate, it might be doable to convert the stream to SPI. However, that is again to reinvent T1/E1 to serial conversion.

    Quick googling on T1/E1 to Ethernet conversion brings up number devices on the market already. Having them, I don't know what would push me into inventing my own solution. And just in case, quick search in Artix 7 IP repository brings no solutions for G.703 or anything like T1/E1.