Altera Mentor Verification IP Altera Edition AMBA AXI4-St Bedienungsanleitung PDF herunterladen (Seite 126)

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

126

VHDL Slave BFM

VHDL Slave BFM API

April 2014

Example 9-2. Slave BFM Individual Assertion Enable/Disable

-- Define a local bit vector to hold the value of the assertion bit vector

variable config_assert_bitvector :

std_logic_vector(AXI4STREAM_MAX_BIT_SIZE-1 downto 0);

-- Get the current value of the assertion bit vector

get_config(AXI4STREAM_CONFIG_ENABLE_ASSERTION, config_assert_bitvector,

bfm_index, axi4stream_tr_if_0(bfm_index));

-- Assign the AXI4STREAM_TLAST_CHANGED_BEFORE_TREADY assertion bit to 0

config_assert_bitvector(AXI4STREAM_TLAST_CHANGED_BEFORE_TREADY) := ‘0’;

-- Set the new value of the assertion bit vector

set_config(AXI4STREAM_CONFIG_ENABLE_ASSERTION, config_assert_bitvector,

bfm_index, axi4stream_tr_if_0(bfm_index));

Note

Do not confuse the AXI4STREAM_CONFIG_ENABLE_ASSERTION bit vector with the

AXI4STREAM_CONFIG_ENABLE_ALL_ASSERTIONS global enable/disable.

To re-enable the AXI4STREAM_TLAST_CHANGED_BEFORE_TREADY assertion, follow

the code sequence in Example 9-2 and assign the assertion within the

AXI4STREAM_CONFIG_ENABLE_ASSERTION bit vector to 1.

For a complete listing of assertions, refer to “Assertions” on page 205.

VHDL Slave BFM API

This section describes the VHDL Slave BFM API.

Each procedure available within the slave BFM API is detailed in the following chapter. The

set*() and get*() procedures that operate on the Transaction Record fields have a simple rule for

the procedure name: set_ or get_ followed by the name of the transaction field to be accessed.

Refer to “Transaction Record” on page 23 for details of transaction field names.

Note

The slave BFM API package is the axi4stream/bfm/mgc_axi4stream_bfm_pkg.vhd file

packaged within the Mentor Verification IP Altera Edition.

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Altera Mentor Verification IP Altera Edition AMBA AXI4-St Bedienungsanleitung Seite 126