Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

QSYS SPI not parametrized ?

Hello,

I am trying to test my own SPI (master) BFM so I used QSYS o create a simple design: SPI_BRIDGE and one ONCHP RAM. My question is:

How can I find out the parameter of the SPI_BRIDGE ? Is it 32bit address and 32bit data? i.e. do I send it one clock for W/R

followed by 32 clocks for address and 32 clocks for data? The SPI_BRIDGE is the only Avalon master, no NIOS. How can I set its parameters?

Thanks,

S.

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    I don't have any answers for you, as I ran into some similar questions/uncertainties with some of the SPI stuff.

    When it came to implementing a slave device, I ended up using the spi slave to avalon MM master found on the alterawiki site. I customized it for word/address size and simulated it so I understood how it worked. It seemed like a better starting point for me since there was some documentation. There must be a better way to use the altera SPI stuff but it wasn't obvious to me.

    Hopefully you will get a more helpful response as I would like to know more as well.

    Lance
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    --- Quote Start ---

    I don't have any answers for you, as I ran into some similar questions/uncertainties with some of the SPI stuff.

    When it came to implementing a slave device, I ended up using the spi slave to avalon MM master found on the alterawiki site. I customized it for word/address size and simulated it so I understood how it worked. It seemed like a better starting point for me since there was some documentation. There must be a better way to use the altera SPI stuff but it wasn't obvious to me.

    Hopefully you will get a more helpful response as I would like to know more as well.

    Lance

    --- Quote End ---

    Hi Lance,

    I sort of cleared the mystery a bit when found the spec. for the spi_bridge_MM. The spec's link is broken... but if you google it you see how screwy it is to use.

    Anyway, I used a external-master-bridge with an external slave SPI, instead.

    Cheers,

    S.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    Shvitzer,

    Thanks! -- screwy indeed.

    I downloaded the spi bridge design example. At least it *seems* complete.

    Lance