Altera Mentor Verification IP Altera Edition AMBA AXI3/4T Manual do Utilizador descarregar pdf (Página 213)

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101

VHDL API Overview

Waiting Events

Mentor VIP AE AXI3/4 User Guide, V10.2b

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September 2013

execute_transaction(), execute*_burst(), execute*_phase()

If the DUT is a slave then the execute_transaction() procedure is called in the master BFM test

program. If the DUT is a master then the execute*_burst() and execute*_phase() procedures are

called in the slave BFM test program.

For example, to execute a master write transaction the master BFM test program would contain

the following code:

-- * = axi| axi4

-- By default the execution of a transaction will block

execute_transaction(tr_id, bfm_index, *_tr_if_2(bfm_index));

For example, to execute a slave write response phase, the slave BFM test program would

contain the following code:

-- * = axi| axi4

-- By default the execution of a phase will block

execute_write_response_phase(write_trans, bfm_index,

*_tr_if_2(bfm_index));

In the above example, the bfm_index specifies the 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*_transaction(), get*_burst(), get*_phase(), get*_cycle() procedures block the test

program code execution until a complete transaction, burst, phase or cycle has occurred,

respectively.

wait_on()

For example, a BFM test program can wait for the positive edge of the ARESETn signal using

the following code:

-- * = axi| axi4

-- ** = AXI | AXI4

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

wait_on(**_RESET_POSEDGE, bfm_index, *_tr_if_0(bfm_index));

In the above example, the bfm_index specifies the BFM.

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