I am doing only PHY layer portion in that I have doubt that I am currently doing mini Signal and now doing specific transmission signal in that I have to drive the data(TXD<7:0>) at the rising edge of GTX_CLK now my questions is that from that txd transfer fixed value of preamble I have to drive before the txd data and then after transmission of txd at the end I have to also drive FCS which is also fixed now I write these fixed value in constraint I have the assertion error, so is there any way to write those fix value before and after the driving of the TXD data
In reply to kartik@23Patel:
If you are getting an assertion error the timing of your signals will be wrong. And you do not have to consider the fixed value in the seq_item. When receiving a new seq_item you have to implement the phy protocol with the right timing. The fixed value comes before you are sending the seq_item data and after them.