Altera Mentor Verification IP Altera Edition AMBA AXI4-Stream User Manual
Page 90
Mentor Verification IP AE AMBA AXI4-Stream User Guide, V10.3
90
VHDL Master BFM
Master Assertions
April 2014
Alternatively, you can disable individual built-in assertions by using a sequence of
and
commands on the respective assertion.
assertion checking for the TLAST signal changing between the TVALID and TREADY
handshake signals.
Example 8-2. Master 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
and assign the assertion enable within the
AXI4STREAM_CONFIG_ENABLE_ASSERTION bit vector to 1.