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Mentor VIP AE AXI3/4 User Guide, V10.2b
612
VHDL Tutorials
Verifying a Slave DUT
September 2013
The read transaction is then executed onto the protocol signals by calling the
execute_transaction() procedure. The read data is obtained by calling the get_data_words()
procedure twice to get the data_words transaction field values. The result of the read data is
compared with the expected data—and a message displays the transcript.
Example 11-5. Read Burst Transaction Creation and Execution
-- Read data burst of length 1 from address 16.
create_read_transaction(16, 1, tr_id, index, axi_tr_if_0(index));
execute_transaction(tr_id, index, axi_tr_if_0(index));
get_data_words(data_words, 0, tr_id, index, axi_tr_if_0(index));
if(data_words(31 downto 0) = x"ACE0ACE1") then
report "master_test_program: Read correct data (hACE0ACE1) at
address(16)";
else
hwrite(lp, data_words(31 downto 0));
report "master_test_program: Error: Expected data (hACE0ACE1) at
address (16), but got " & lp.all;
end if;
get_data_words(data_words, 1, tr_id, index, axi_tr_if_0(index));
if(data_words(31 downto 0) = x"ACE2ACE3") then
report "master_test_program: Read correct data (hACE2ACE3) at
address (20)";
else
hwrite(lp, data_words(31 downto 0));
report "master_test_program: Error: Expected data (hACE2ACE3) at
address (20), but got " & lp.all;
end if;
In the complete Master Test Program, a subsequent read transaction is created and executed in a
similar manner to that shown in Example 11-5. See the VHDL AXI3 Master BFM Test Program
code listing for details.
Outstanding Write Burst Transaction Creation and Execution
The code excerpt in Example 11-2 uses the AXI3 Master BFM create_write_transaction()
procedure to create a write burst transaction by providing the start address and burst length
arguments. The actual length of the burst on the protocol wires is 3+1=4.
Note
The burst length argument passed to the create_read_transaction() procedure is 1 less
than the number of transfers (beats) in the burst. This aligns the burst length argument
value with the value placed on the ARLEN protocol signals.
The set_data_words() procedure is then called four times to set the data_words field of the
write transaction for each beat of the data burst. For this write transaction, all data byte lanes
contain valid data on each beat of the data burst, therefore a ‘for .. loop’ uses the
set_write_strobes() procedure to set the write_strobes fields of the transaction to 15.
- Verification IP Altera 1
- Edition 1
- AMBA AXI3/4 1
- User Guide 1
- Table of Contents 10
- List of Examples 13
- List of Figures 16
- List of Tables 17
- About This User Guide 19
- Protocol Restrictions 19
- Supported Simulators 20
- Simulator GCC Requirements 21
- Chapter 1 23
- Mentor VIP Altera Edition 23
- What Is a Transaction? 24
- An AXI Transaction 24
- Chapter 2 31
- SystemVerilog API Overview 31
- Transaction Record 33
- Table 2-1. Transaction Fields 35
- AXI3 BFM Delay Mode 48
- Chapter 3 51
- SystemVerilog Master API 57
- Chapter 4 87
- SystemVerilog Slave API 93
- Operational 100
- Transaction 100
- AXI3 Example 101
- AXI4 Example 101
- September 2013 107
- AXI3 BFM 109
- Helper Functions 118
- Chapter 5 121
- Monitor BFM Protocol Support 122
- Monitor Timing and Events 122
- Monitor BFM Configuration 122
- Timing Variables 124
- Slave Attributes 125
- Error Detection 125
- Monitor Assertions 126
- SystemVerilog Monitor API 127
- Prototype 128
- Arguments 128
- Arguments config_name 130
- (AXI4) Configuration name: 130
- Chapter 6 155
- SystemVerilog Tutorials 155
- AXI3 BFM Master Test Program 156
- AXI4 BFM Master Test Program 161
- Verifying a Slave DUT 162
- Verifying a Master DUT 173
- Example 6-30. process_write 184
- Example 6-31. handle_write 185
- AXI4 BFM Slave Test Program 186
- Internal Memory 187
- Example 6-44. handle_read 197
- Example 6-45. process_write 198
- Chapter 7 203
- VHDL API Overview 203
- Test Program VHDL 204
- VHDL to SV Wrapper 204
- Configuration 205
- Creating Transactions 206
- AXI4 Transaction Definition 207
- Table 7-1. Transaction Fields 209
- Transaction Field Description 209
- Protocol Transaction Fields 209
- Executing Transactions 212
- Waiting Events 213
- Access Transaction Record 214
- Operation Mode 216
- Channel Handshake Delay 217
- AXI4 BFM Handshake Delay 218
- Data Beat Done 220
- Transaction Done 220
- Chapter 8 221
- Master BFM Protocol Support 222
- Master Timing and Events 222
- Master BFM Configuration 222
- Master Assertions 225
- AXI4 Assertion Configuration 226
- VHDL Master API 227
- Protocol 233
- Arguments cache 255
- AXI4 BFM 297
- Chapter 9 365
- VHDL AXI3 and AXI4 Slave BFMs 365
- Slave BFM Configuration 366
- Slave Assertions 369
- AXI3 Assertion Configuration 370
- VHDL Slave API 371
- Returns transaction_id 378
- Chapter 10 505
- VHDL Monitor API 511
- Chapter 11 627
- VHDL Tutorials 627
- Example 11-29. handle read 656
- Example 11-38. process_write 668
- Chapter 12 673
- Running the Qsys Tool 676
- Running Simulation 679
- Example Script Processing 682
- Appendix A 685
- Assertions 685
- AXI4 Assertions 698
- Appendix B 715
- Programs 715
- Appendix C 751
- End-User License Agreement 779
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