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VHDL API Overview
Creating Transactions
Mentor Verification IP AE AXI4-Lite User Guide, V10.3
143
April 2014
The master BFM API allows you to create a master transaction by providing only the address
argument 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
slave transaction record. Refer to the create_monitor_transaction() procedure for default
protocol transaction field values.
Note
If you change a protocol transaction field value from its default, it is then valid for all
future transactions until a new value is set.
create*_transaction()
There are two master BFM API procedures available to create transactions,
create_read_transaction() and create_write_transaction(), a create_slave_transaction() slave
BFM API procedure, and a create_monitor_transaction() monitor BFM API procedure.
For example, to create a simple write transaction with a start address of 1, and a single data
phase with a data value of 2, the master BFM test program would contain the following code:
operation_mode An enumeration to hold the operation mode of the
transaction. The two types of operation_mode are:
AXI4_TRANSACTION_NON_BLOCKING
AXI4_TRANSACTION_BLOCKING
write_data_mode An enumeration to hold the write data mode control flag.
The types of write_data_mode are as follows:
AXI4_DATA_AFTER_ADDRESS
AXI4_DATA_WITH_ADDRESS
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
- AMBA AXI4-Lite 1
- User Guide 1
- Table of Contents 10
- List of Examples 12
- List of Figures 14
- List of Tables 15
- About This User Guide 17
- Protocol Restrictions 17
- Supported Simulators 18
- Simulator GCC Requirements 18
- Chapter 1 21
- Mentor VIP Altera Edition 21
- What Is a Transaction? 22
- AXI4-Lite Transactions 22
- Chapter 2 27
- SystemVerilog API Overview 27
- Chapter 3 39
- SystemVerilog Master BFM 39
- SystemVerilog Master API 43
- Returns 44
- Example 58
- Chapter 4 63
- SystemVerilog Slave BFM 63
- SystemVerilog Slave API 68
- Arguments config_name 69
- Chapter 5 91
- SystemVerilog Monitor API 96
- Prototype 100
- Arguments 100
- April 2014 102
- SystemVerilog Monitor BFM 105
- Helper Functions 111
- SystemVerilog Tutorials 115
- Chapter 6 115
- BFM Master Test Program 116
- Verifying a Slave DUT 117
- Verifying a Master DUT 123
- Basic Slave API Definition 124
- *_valid_delay = 4 127
- *_ready_delay = 2 127
- Advanced Slave API Definition 129
- Initial Block 131
- Chapter 7 137
- VHDL API Overview 137
- Test Program VHDL 138
- Configuration 139
- Creating Transactions 139
- Transaction Definition 140
- Executing Transactions 144
- Waiting Events 145
- Access Transaction Record 146
- Operation Mode 147
- Channel Handshake Delay 147
- Handshake Delay 148
- Transaction Done 149
- Chapter 8 151
- VHDL Master BFM 151
- Master BFM Protocol Support 152
- Master Timing and Events 152
- Master BFM Configuration 152
- Master Assertions 155
- VHDL Master API 156
- Chapter 9 213
- VHDL Slave BFM 213
- Slave BFM Configuration 214
- Slave Assertions 216
- VHDL Slave API 217
- Operational 223
- Transaction 223
- Chapter 10 279
- VHDL Monitor BFM 279
- Monitor BFM Configuration 280
- Monitor Assertions 282
- VHDL Monitor API 283
- Chapter 11 335
- VHDL Tutorials 335
- BFM Slave Test Program 341
- Chapter 12 353
- Running the Qsys Tool 356
- Running a Simulation 359
- ModelSim Simulation 360
- Editing the modelsim.ini File 363
- Questa Simulation 364
- Cadence IES Simulation 364
- Synopsys VCS Simulation 366
- Appendix A 369
- AXI4-Lite Assertions 384
- Appendix B 385
- SystemVerilog Test Programs 385
- Appendix C 397
- VHDL Test Programs 397
- End-User License Agreement 409
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