Set_burst_length(), Axi3 example – Altera Mentor Verification IP Altera Edition AMBA AXI3/4TM User Manual

Page 267

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()

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