Set_valid_delay(), Example – Altera Mentor Verification IP Altera Edition AMBA AXI4-Stream User Manual

Page 106

Mentor Verification IP AE AMBA AXI4-Stream User Guide, V10.3

106

VHDL Master BFM
set_valid_delay()

April 2014

set_valid_delay()

This nonblocking procedure sets the valid_delay field for a master transaction that is uniquely
identified by the transaction_id field previously created by the

create_master_transaction()

procedure.

The valid_delay array element is identified by the optional index argument. If no index is
supplied, then the first valid_delay is accessed in the array.

Example

-- Create a master transaction containing 3 transfers
-- Creation returns tr_id to identify the transaction.
create_master_transaction(3, tr_id, bfm_index,
axi4stream_tr_if_0(bfm_index));

-- Set the TVALID delay to 3 ACLK cycles for the first transfer
-- of the tr_id transaction.
set_valid_delay(3, 0, tr_id, bfm_index, axi4stream_tr_if_0(bfm_index));

-- Set the TVALID delay to 2 ACLK cycles for the second transfer
-- of the tr_id transaction.
set_valid_delay(2, 1, tr_id, bfm_index, axi4stream_tr_if_0(bfm_index));

Prototype

set_valid_delay
(

valid_delay: in integer;
index : in integer; --optional
transaction_id : in integer;
bfm_id : in integer;
signal tr_if : inout axi4stream_vhd_if_struct_t

);

Arguments

valid_delay

Valid delay array to store TVALID delays measured in ACLK
cycles for this transaction. Default: 0.

index

(Optional) Array element index number for valid_delay.

transaction_id

Transaction identifier. Refer to “

Overloaded Procedure

Common Arguments

” on page 87 for more details.

bfm_id