Altera Mentor Verification IP Altera Edition AMBA AXI4-Lite - Manual (Page 217)

VHDL Slave BFM
VHDL Slave API
Mentor Verification IP AE AXI4-Lite User Guide, V10.3 217
April 2014
Note
The built-in BFM assertions are independent of programming language and simulator.
Assertion Configuration
By default, all built-in assertions are enabled in the slave BFM. To globally disable them in the
master BFM, use the
set_config() 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 get_config()
and set_config() 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, follow the
above code sequence and assign the assertion within the
AXI4_CONFIG_ENABLE_ASSERTION bit vector to 1.
For a complete listing of assertions, refer to “ AXI4-Lite Assertions ” on page 369.
VHDL Slave API
This section describes the VHDL Slave API.