Altera Mentor Verification IP Altera Edition AMBA AXI3/4T Manual de usuario Pagina 267

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VHDL AXI3 and AXI4 Master BFMs
set_burst_length()
Mentor VIP AE AXI3/4 User Guide, V10.2b
249
September 2013
set_burst_length()
This nonblocking procedure sets the burst_length field for a transaction that is uniquely
identified by the transaction_id field previously created by either the
create_write_transaction() or create_read_transaction() procedure.
Note
The burst_length field is the value that appears on the AWLEN and the ARLEN protocol
signals. The number of data phases (beats) in a data burst is therefore burst_length + 1.
AXI3 Example
-- Create a read transaction with start address of 1.
-- Creation returns tr_id to identify the transaction.
create_read_transaction(1, tr_id, bfm_index, axi_tr_if_0(bfm_index));
-- Set the burst length field to 2 (3 beats) for the tr_id transaction.
set_burst_length(2, tr_id, bfm_index, axi_tr_if_0(bfm_index));
Prototype
-- * = axi| axi4
-- ** = AXI | AXI4
set_burst_length
(
burst_length : in std_logic_vector(**_MAX_BIT_SIZE-1 downto 0) |
integer;
transaction_id : in integer;
bfm_id : in integer;
path_id : in *_path_t; --optional
signal tr_if : inout *_vhd_if_struct_t
);
Arguments burst_length
Burst length. Default: 0.
transaction_id Transaction identifier. Refer to “Overloaded Procedure Common
Arguments” on page 203 for more details.
bfm_id BFM identifier. Refer to “Overloaded Procedure Common Arguments”
on page 203 for more details.
path_id (Optional) Parallel process path identifier:
**_PATH_0
**_PATH_1
**_PATH_2
**_PATH_3
**_PATH_4
Refer to “Overloaded Procedure Common Arguments” on page 203 for
more details.
tr_if Transaction signal interface. Refer to “Overloaded Procedure Common
Arguments” on page 203 for more details.
Returns
None
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