UART serial interface

Question

I want to transfer 8 bits serially (1 bit/clock cycle) through a 1 bit serial interface of a UART. I created an 8 bit packet in the transaction class and drove the packet through the driver modport of the interface. Here is the code snippet below.

        for (i = ($size(pkt.RXD)-1); i <= 0; i = i-1) begin

            RXSD_vif.DRV.cb_RXSD_DRV.RXD <= RXSD_pkt[i];

        end

RXSD_vif is the virtual interface handle.

DRV - modport

cb_RXSD_DRV is the clocking block where I'm taking the positive clock edge with RXD made out to be output.

I'm getting a compile error saying "Too many indices going into RXSD_pkt".

I'm fairly new to this and would appreciate any help in telling me how to fix this. Thanks in advance

You need to show the whole code, otherwise it's not possible to tell exactly what's wrong. — Tudor Timi
– Tudor Timi, Commented Jan 28, 2018 at 9:53

Prateek Venkatesh Srivastav · Accepted Answer · 2018-01-28 10:31:09Z

0

I think you're passing the index 'i' to the handle of the packet class. There should be an 8 bit vector within the class through which you need to index. Does this help in any way?

answered Jan 28, 2018 at 10:31

Prateek Venkatesh Srivastav

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