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VHDL API Overview
Creating Transactions
Mentor VIP AE AXI3/4 User Guide, V10.2b
193
September 2013
The master BFM API allows you to create a master transaction by providing only the address
and burst length arguments for a read, or write, transaction. All other protocol transaction fields
automatically default to legal protocol values to create a complete master transaction record.
Refer to the create_read_transaction() and create_write_transaction() procedures for default
protocol read and write transaction field values.
The slave BFM API allows you to create a slave transaction by providing no arguments. All
protocol transaction fields automatically default to legal protocol values to create a complete
slave transaction record. Refer to the create_slave_transaction() procedure for default protocol
transaction field values.
The monitor BFM API allows you to create a slave transaction by providing no arguments. All
protocol transaction fields automatically default to legal protocol values to create a complete
address_ready_delay An integer to hold the delay value of the address channel
AWREADY and ARREADY signals (measured in ACLK cycles)
for a read or write transaction, respectively.
data_ready_delay An unsized array of integers to hold the delay values of the
data channel WREADY and RREADY signals (measured in
ACLK cycles) for a read or write transaction, respectively.
write_response_ready_delay An integer to hold the delay value of the write response
channel BREADY signal (measured in ACLK cycles) for a write
transaction.
gen_write_strobes Automatically correct write strobes flag. Refer to Automatic
Correction of Byte Lane Strobes for details.
operation_mode An enumeration to hold the operation mode of the transaction.
The two types of operation_mode are:
**_TRANSACTION_NON_BLOCKING
**_TRANSACTION_BLOCKING
delay_mode (AXI3) An enumeration to hold the delay mode control flag.
The types of delay_mode are:
AXI_VALID2READY
AXI_TRANS2READY
Refer to AXI3 BFM Delay Mode for details.
write_data_mode (AXI3) An enumeration to hold the write data mode control flag.
The types of write_data_mode are:
**_DATA_AFTER_ADDRESS
**_DATA_WITH_ADDRESS
data_beat_done An unsized bit array to hold the done flag for each beat in a
read or write data burst when it has completed.
transaction_done A bit to hold the done flag for a transaction when it has
completed.
Table 7-1. Transaction Fields (cont.)
Transaction Field Description
- 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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