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

Page 142

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

142

VHDL Slave BFM
get_valid_delay()

April 2014

get_valid_delay()

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

create_slave_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 slave transaction.
-- Creation returns tr_id to identify the transaction.
create_slave_transaction(tr_id, bfm_index,
axi4stream_tr_if_0(bfm_index));

-- Get the TVALID delay for the first transfer of the tr_id transaction.
get_valid_delay(valid_delay, 0, tr_id, bfm_index,

axi4stream_tr_if_0(bfm_index));

-- Get the TVALID delay or the second transfer of the tr_id transaction.
get_valid_delay(valid_delay, 1, tr_id, bfm_index,

axi4stream_tr_if_0(bfm_index));

Prototype

get_valid_delay
(

valid_delay: out 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