Altera Mentor Verification IP Altera Edition AMBA AXI4-St Bedienungsanleitung PDF herunterladen (Seite 82)

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

VHDL API Overview

Waiting Events

April 2014

In the above example, the bfm_index specifies the actual slave BFM.

Waiting Events

Each BFM API has procedures that block the test program code execution until an event has

occurred.

The wait_on() procedure blocks the test program until an ACLK or ARESETn signal event has

occurred before proceeding.

The get_packet(), get_transfer() procedures block the test program code execution until a

complete stream packet or transfer has occurred.

wait_on()

Example 7-7 shows a BFM test program waiting for the positive edge of the ARESETn signal.

Example 7-7. Test Program Wait for Event

-- Block test program execution until the positive edge of the

-- ARESETn signal.

wait_on(AXI4STREAM_RESET_POSEDGE, bfm_index,

axi4stream_tr_if_0(bfm_index));

In the above example, the bfm_index specifies the actual master BFM.

get_packet(), get_transfer()

Example 7-8 shows a slave BFM test program using the get_packet() procedure to block until it

has received a data stream transfer.

Example 7-8. Slave Test Program get_packet() Procedure

-- Define a local variable trans to hold the transaction record

variable trans: integer;

...

-- Create a slave transaction

create_slave_transaction(trans, bfm_index,

axi4stream_tr_if_0(bfm_index));

...

--Wait for the first data stream transfer to occur.

get_transfer(trans, 0, last, bfm_index, axi4stream_tr_if_0(bfm_index));

In the above example, the bfm_index specifies the actual slave BFM.

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Altera Mentor Verification IP Altera Edition AMBA AXI4-St Bedienungsanleitung Seite 82