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praveenkumar's avatar
praveenkumar
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

nios ii flash programmer

can anyone tell me how i can know the external flash is connected . i added generic tristate controller and conduit bridge in qysys. and assigned pins in pin planner . i want to write to nor f...
nome's avatar
nome
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

Hello

I am trying to configure EP2AGX Arria® II GX using EPM240 Max ii CPLD and on board having CFI Flash js28f256m29ewh

In my case our custom Board having Flash Address bus A0 to A24 bus and Data D0..D7 Bus connected with FPGA CEn, OEn, WEn with FPGA

In case of cpld we have only Flash Address bus ,CEn and OEn, pins WEn not connected with CPLD and also there is no data bus between cpld an flash

So That's why I am confuse how to program flash memory

Is it with from CPLD Or FPGA because of Flash Data Bus only connected with FPGA configure data 8 bit port like DATA0 to DATA7

That s why I asked you

In your Above case I think its Big Endian and Little endian Issue I did this issued in PIc32 MPU

Thanks for your Reply knowledgeable

Nome

praveenkumar's avatar
praveenkumar
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

hi nome ,

In ur board there is no flash data bus lines connected to ur P2AGX Arria® II GX or EPM240 Max ii CPLD.

CFI Flash js28f256m29ewh for this flash if there is no data lines u cannot use it .

its like waste piece in board.

  • nome's avatar
    nome
    Icon for Occasional Contributor rankOccasional Contributor
    5 years ago

    Hello praveenkumar

    As above I told Data Bus only connected with FPGA EP2AGX Arria® II GX

    No Data Bus connected with CPLD even no WEn pin connected with CPLD

    So That's why I am confuse how to program flash memory by CPLD OR FPGA

    Thanks

    Nome

    • praveenkumar's avatar
      praveenkumar
      Icon for Occasional Contributor rankOccasional Contributor
      5 years ago

      hi nome , as u said

      Data Bus only connected with FPGA EP2AGX Arria® II GX

      No Data Bus connected with CPLD even no WEn pin connected with CPLD .

      the u can program it with ur fpga only.

      i dont know why u r using cpld . there is no option for loading through jtag.

      u can program ur flash by using fpga .