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Specman DUT error:

archive

The protocol checkers suppose to work after transaction starts,
But getting fail even before transaction starts.

i.e.,It is checking before any actual transaction starts, with out any
events triggered that were supposed to trigger the protocol checks.

following error massage:

*** Dut error at time 60
Checked at line 81 in @X_xyz_protocol_checker
In X_xyz_monitor_u-@41 (unit: sys.xyz_evc.bus_monitor):

ERR_READ_XZ
Read went to X or Z during Address Phase

what could be the resone?.



Thanks in advance

Regads,
-Balram Naik



Originally posted in cdnusers.org by balram.naik
Parents

  • Hmm.. Just to be 100% sure I would try to replace that piece of code with this:

    on normal_address_phase {
    message(NONE,"checking for X or Z values during address phase");
    check that (env.smp.sig_read.has_z() == FALSE and env.smp.sig_read_has_x() = FALSE);
    };

    And see what happens...
    1. Is the address phase event defined correctly?
    2. If yes - maybe you're sampling the bus at transition point from X/Z to valid value


    Hope this helps :-)


    Yaron.


    Originally posted in cdnusers.org by thinkverification
Reply

  • Hmm.. Just to be 100% sure I would try to replace that piece of code with this:

    on normal_address_phase {
    message(NONE,"checking for X or Z values during address phase");
    check that (env.smp.sig_read.has_z() == FALSE and env.smp.sig_read_has_x() = FALSE);
    };

    And see what happens...
    1. Is the address phase event defined correctly?
    2. If yes - maybe you're sampling the bus at transition point from X/Z to valid value


    Hope this helps :-)


    Yaron.


    Originally posted in cdnusers.org by thinkverification
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