Assertion configuration, Vhdl monitor api – Altera Mentor Verification IP Altera Edition AMBA AXI4-Lite User Manual
Page 283
VHDL Monitor BFM
VHDL Monitor API
Mentor Verification IP AE AXI4-Lite User Guide, V10.3
283
April 2014
Assertion Configuration
By default, all built-in assertions are enabled in the monitor BFM. To globally disable them in
the monitor BFM, use the
command as the following example illustrates:
set_config(AXI4_CONFIG_ENABLE_ALL_ASSERTIONS,0,bfm_index,
axi4_tr_if_0(bfm_index));
Alternatively, you can disable individual built-in assertions by using a sequence of
and
commands on the respective assertion. For example, to disable assertion
checking for the AWADDR signal changing between the AWVALID and AWREADY
handshake signals, use the following sequence of commands:
-- Define a local bit vector to hold the value of the assertion bit vector
variable config_assert_bitvector : std_logic_vector(AXI4_MAX_BIT_SIZE-1
downto 0);
-- Get the current value of the assertion bit vector
get_config(AXI4_CONFIG_ENABLE_ASSERTION, config_assert_bitvector,
bfm_index, axi4_tr_if_0(bfm_index));
-- Assign the AXI4_AWADDR_CHANGED_BEFORE_AWREADY assertion bit to 0
config_assert_bitvector(AXI4_AWADDR_CHANGED_BEFORE_AWREADY) := ‘0’;
-- Set the new value of the assertion bit vector
set_config(AXI4_CONFIG_ENABLE_ASSERTION, config_assert_bitvector,
bfm_index, axi4_tr_if_0(bfm_index));
Note
Do not confuse the AXI4_CONFIG_ENABLE_ASSERTION bit vector with the
AXI4_CONFIG_ENABLE_ALL_ASSERTIONS global enable/disable.
To re-enable the AXI4_AWADDR_CHANGED_BEFORE_AWREADY assertion, following
the above code sequence, assign the assertion within the
AXI4_CONFIG_ENABLE_ASSERTION bit vector to 1.
For a complete listing of assertions, refer to “
VHDL Monitor API
This section describes the VHDL Monitor API.