1 Reply Latest reply on Aug 3, 2016 1:40 PM by Madhu Lakshmipathy

    fx2lp receives zeros from FPGA !!!


      I have altera cyclon V Soc DE1 and cypress cy7c68013a usb board FX2LP.
      My project is send streaming data (counter from 0000 to FFFF) from FPGA to FX2LP.
      After I connect data pins,flags,control signals and clock between FPGA and FX2LP ,FX2LP receives zeros , but when I connect data pins of FX2LP to 3.3V pin , the FX2LP pins receives high( 1 ).


      I am using stream IN VHDL code from AN61345 project in http://www.cypress.com/documentation/application-notes/an61345-designing-ez-usb-fx2lp-slave-fifo-interface  , and I modified PLL, DDR and Pins assignment for CycloneV ( because AN61345  using Xilinx Spartan 6 FPGA) . 
       Can anyone help me to know where is the problem??