Bitvis VIP Wishbone

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BFM
VVC

BFM

BFM functionality is implemented in wishbone_bfm_pkg.vhd

Signal Record

t_wishbone_if

Record element	Type
dat_o	std_logic_vector
dat_i	std_logic_vector
adr_o	std_logic_vector
cyc_o	std_logic
stb_o	std_logic
we_o	std_logic
ack_i	std_logic

Configuration Record

t_wishbone_bfm_config

Default value for the record is C_WISHBONE_BFM_CONFIG_DEFAULT.

Record element	Type	Default	Description
max_wait_cycles	integer	10	The maximum number of clock cycles to wait for the DUT ready signal before reporting a timeout alert
max_wait_cycles_severity	t_alert_level	FAILURE	The above timeout will have this severity
clock_period	time	-1 ns	Period of the clock signal
clock_period_margin	time	0 ns	Input clock period margin to specified clock_period. Will check ‘T/2’ if input clock is low when BFM is called and ‘T’ if input clock is high.
clock_margin_severity	t_alert_level	TB_ERROR	The above margin will have this severity
setup_time	time	-1 ns	Generated signals setup time. Suggested value is clock_period/4. An alert is reported if setup_time exceeds clock_period/2.
hold_time	time	-1 ns	Generated signals hold time. Suggested value is clock_period/4. An alert is reported if hold_time exceeds clock_period/2.
match_strictness	t_match_strictness	MATCH_EXACT	Matching strictness for std_logic values in check procedures. MATCH_EXACT requires both values to be the same. Note that the expected value can contain the don’t care operator ‘-‘. MATCH_STD allows comparisons between ‘H’ and ‘1’, ‘L’ and ‘0’ and ‘-’ in both values.
id_for_bfm	t_msg_id	ID_BFM	Message ID used for logging general messages in the BFM
id_for_bfm_wait	t_msg_id	ID_BFM_WAIT	DEPRECATED
id_for_bfm_poll	t_msg_id	ID_BFM_POLL	DEPRECATED

Methods

All signals are active high.
All parameters in brackets are optional.

wishbone_write()

Writes the given data to the given address on the DUT, using the Wishbone protocol.

wishbone_write(addr_value, data_value, msg, clk, wishbone_if, [scope, [msg_id_panel, [config]]])

Object	Name	Dir.	Type	Description
constant	addr_value	in	unsigned	The address of a software accessible register
constant	data_value	in	std_logic_vector	The data value to be written to the addressed register
constant	msg	in	string	A custom message to be appended in the log/alert
signal	clk	in	std_logic	The clock signal used to read and write data in/out of the Wishbone BFM
signal	wishbone_if	inout	t_wishbone_if	Wishbone signal interface record
constant	scope	in	string	Describes the scope from which the log/alert originates. Default value is C_BFM_SCOPE (“WISHBONE BFM”).
constant	msg_id_panel	in	t_msg_id_panel	Controls verbosity within a specified scope. Default value is shared_msg_id_panel.
constant	config	in	t_wishbone_bfm_config	Configuration of BFM behavior and restrictions. Default value is C_WISHBONE_BFM_CONFIG_DEFAULT.

-- Examples:
wishbone_write(x"1000", x"55", "Write data to Peripheral 1", clk, wishbone_if);
wishbone_write(x"1000", x"55", "Write data to Peripheral 1", clk, wishbone_if, C_SCOPE, shared_msg_id_panel, C_WISHBONE_BFM_CONFIG_DEFAULT);

-- Suggested usage (requires local overload, see 'Local BFM overloads' section):
wishbone_write(C_ADDR_UART_TX, x"40", "Set baud rate to 9600");

wishbone_read()

Reads data from the DUT at the given address, using the Wishbone protocol.

wishbone_read(addr_value, data_value, msg, clk, wishbone_if, [scope, [msg_id_panel, [config]]])

Object	Name	Dir.	Type	Description
constant	addr_value	in	unsigned	The address of a software accessible register
variable	data_value	out	std_logic_vector	The data value read from the addressed register
constant	msg	in	string	A custom message to be appended in the log/alert
signal	clk	in	std_logic	The clock signal used to read and write data in/out of the Wishbone BFM
signal	wishbone_if	inout	t_wishbone_if	Wishbone signal interface record
constant	scope	in	string	Describes the scope from which the log/alert originates. Default value is C_BFM_SCOPE (“WISHBONE BFM”).
constant	msg_id_panel	in	t_msg_id_panel	Controls verbosity within a specified scope. Default value is shared_msg_id_panel.
constant	config	in	t_wishbone_bfm_config	Configuration of BFM behavior and restrictions. Default value is C_WISHBONE_BFM_CONFIG_DEFAULT.

-- Examples:
wishbone_read(x"1000", v_data_out, "Read from Peripheral 1", clk, wishbone_if);
wishbone_read(x"1000", v_data_out, "Read from Peripheral 1", clk, wishbone_if, C_SCOPE, shared_msg_id_panel, C_WISHBONE_BFM_CONFIG_DEFAULT);

-- Suggested usage (requires local overload, see 'Local BFM overloads' section):
wishbone_read(C_ADDR_UART_BAUD, v_data_out, "Read UART baud rate");

wishbone_check()

Reads data from the DUT at the given address, using the Wishbone protocol. After reading data from the Wishbone bus, the read data is compared with the expected data.

If the check was successful, and the read data matches the expected data, a log message is written with ID ‘config.id_for_bfm’.
If the read data did not match the expected data, an alert with severity ‘alert_level’ will be reported.

wishbone_check(addr_value, data_exp, msg, clk, wishbone_if, [alert_level, [scope, [msg_id_panel, [config]]]])

Object	Name	Dir.	Type	Description
constant	addr_value	in	unsigned	The address of a software accessible register
constant	data_exp	in	std_logic_vector	The data value to expect when reading the addressed register. A mismatch results in an alert with severity ‘alert_level’.
constant	msg	in	string	A custom message to be appended in the log/alert
signal	clk	in	std_logic	The clock signal used to read and write data in/out of the Wishbone BFM
signal	wishbone_if	inout	t_wishbone_if	Wishbone signal interface record
constant	alert_level	in	t_alert_level	Sets the severity for the alert. Default value is ERROR.
constant	scope	in	string	Describes the scope from which the log/alert originates. Default value is C_BFM_SCOPE (“WISHBONE BFM”).
constant	msg_id_panel	in	t_msg_id_panel	Controls verbosity within a specified scope. Default value is shared_msg_id_panel.
constant	config	in	t_wishbone_bfm_config	Configuration of BFM behavior and restrictions. Default value is C_WISHBONE_BFM_CONFIG_DEFAULT.

-- Examples:
wishbone_check(x"1155", x"3B", "Check data from Peripheral 1", clk, wishbone_if);
wishbone_check(x"1155", x"3B", "Check data from Peripheral 1", clk, wishbone_if, ERROR, C_SCOPE, shared_msg_id_panel, C_WISHBONE_BFM_CONFIG_DEFAULT);

-- Suggested usage (requires local overload, see 'Local BFM overloads' section):
wishbone_check(C_ADDR_UART_RX, x"3B", "Check data from UART RX buffer");

init_wishbone_if_signals()

Initializes the Wishbone interface. All the BFM outputs are set to ‘0’, and BFM inputs are set to ‘Z’.

t_wishbone_if := init_wishbone_if_signals(addr_width, data_width)

Object	Name	Dir.	Type	Description
constant	addr_width	in	natural	Width of the address signal
constant	data_width	in	natural	Width of the data signals

-- Examples:
wishbone_if <= init_wishbone_if_signals(dat_o.addr'length, adr_o.wdata'length);

Local BFM overloads

A good approach for better readability and maintainability is to make simple, local overloads for the BFM procedures in the TB process. This allows calling the BFM procedures with the key parameters only, e.g.

wishbone_write(C_ADDR_UART_BAUDRATE, C_BAUDRATE_9600, "Set Baud-rate to 9600");

rather than

wishbone_write(C_ADDR_UART_BAUDRATE, C_BAUDRATE_9600, "Set Baud-rate to 9600", clk, wishbone_if, C_SCOPE, shared_msg_id_panel, C_WISHBONE_BFM_CONFIG_DEFAULT);

By defining the local overload as e.g.

procedure wishbone_write(
  constant addr_value : in unsigned;
  constant data_value : in std_logic_vector;
  constant msg        : in string) is
begin
  wishbone_write(addr_value,               -- Keep as is
                 data_value,               -- Keep as is
                 msg,                      -- Keep as is
                 clk,                      -- Signal must be visible in local process scope
                 wishbone_if,              -- Signal must be visible in local process scope
                 C_SCOPE,                  -- Use the default
                 shared_msg_id_panel,      -- Use global, shared msg_id_panel
                 C_WISHBONE_CONFIG_LOCAL); -- Use locally defined configuration or C_WISHBONE_BFM_CONFIG_DEFAULT
end procedure;

Using a local overload like this also allows the following – if wanted:

Have address value as natural – and convert in the overload
Set up defaults for constants. May be different for two overloads of the same BFM
Apply dedicated message ID panel to allow dedicated verbosity control

Compilation

This BFM package may only be compiled with VHDL-2008 or newer. It is dependent on the Utility Library, which is only compatible with VHDL-2008 or newer.
After UVVM-Util has been compiled, the BFM package can be compiled into any desired library.
See Essential Mechanisms - Compile Scripts for information about compile scripts.

Simulator compatibility and setup

See Prerequisites for a list of supported simulators.
For required simulator setup see UVVM-Util Simulator compatibility and setup.

Additional Documentation

Important

This is a simplified Bus Functional Model (BFM) for Wishbone.
The given BFM complies with the basic Wishbone protocol and thus allows a normal access towards a Wishbone interface.
This BFM is not a Wishbone protocol checker.
For a more advanced BFM please contact UVVM support at info@uvvm.org

VVC

VVC functionality is implemented in wishbone_vvc.vhd
For general information see VVC Framework - Essential Mechanisms.

Entity

Generics

Name	Type	Default	Description
GC_ADDR_WIDTH	integer	8	Width of the Wishbone address bus
GC_DATA_WIDTH	integer	32	Width of the Wishbone data bus
GC_INSTANCE_IDX	natural	1	Instance number to assign the VVC
GC_WISHBONE_BFM_CONFIG	t_wishbone_bfm_config	C_WISHBONE_BFM_CONFIG_DEFAULT	Configuration for the Wishbone BFM
GC_CMD_QUEUE_COUNT_MAX	natural	C_CMD_QUEUE_COUNT_MAX	Absolute maximum number of commands in the VVC command queue
GC_CMD_QUEUE_COUNT_THRESHOLD	natural	C_CMD_QUEUE_COUNT_THRESHOLD	An alert will be generated when reaching this threshold to indicate that the command queue is almost full. The queue will still accept new commands until it reaches GC_CMD_QUEUE_COUNT_MAX.
GC_CMD_QUEUE_COUNT_THRESHOLD_SEVERITY	t_alert_level	C_CMD_QUEUE_COUNT_THRESHOLD_SEVERITY	Alert severity which will be used when command queue reaches GC_CMD_QUEUE_COUNT_THRESHOLD
GC_RESULT_QUEUE_COUNT_MAX	natural	C_RESULT_QUEUE_COUNT_MAX	Maximum number of unfetched results before result_queue is full
GC_RESULT_QUEUE_COUNT_THRESHOLD	natural	C_RESULT_QUEUE_COUNT_THRESHOLD	An alert will be issued if result queue exceeds this count. Used for early warning if result queue is almost full. Will be ignored if set to 0.
GC_RESULT_QUEUE_COUNT_THRESHOLD_SEVERITY	t_alert_level	C_RESULT_QUEUE _COUNT_THRESHOLD_SEVERITY	Severity of alert to be initiated if exceeding GC_RESULT_QUEUE_COUNT_THRESHOLD

Signals

Object	Name	Dir.	Type	Description
signal	clk	in	std_logic	VVC Clock signal
signal	wishbone_vvc_master_if	inout	t_wishbone_if	Wishbone signal interface record

In this VVC, the interface has been encapsulated in a signal record of type t_wishbone_if in order to improve readability of the code. Since the Wishbone interface buses can be of arbitrary size, the interface vectors have been left unconstrained. These unconstrained vectors need to be constrained when the interface signals are instantiated. For this interface, it could look like:

signal wishbone_if : t_wishbone_if(adr_o(C_ADDR_WIDTH - 1 downto 0),
                                   dat_o(C_DATA_WIDTH - 1 downto 0),
                                   dat_i(C_DATA_WIDTH - 1 downto 0));

Configuration Record

vvc_config accessible via shared_wishbone_vvc_config

Record element	Type	Default	Description
inter_bfm_delay	t_inter_bfm_delay	C_WISHBONE_INTER_BFM_DELAY_DEFAULT	Delay between any requested BFM accesses towards the DUT. TIME_START2START: Time from a BFM start to the next BFM start (a TB_WARNING will be issued if access takes longer than TIME_START2START). TIME_FINISH2START: Time from a BFM end to the next BFM start. Any insert_delay() command will add to the above minimum delays, giving for instance the ability to skew the BFM starting time.
cmd_queue_count_max	natural	C_CMD_QUEUE_COUNT_MAX	Maximum pending number in command queue before queue is full. Adding additional commands will result in an ERROR.
cmd_queue_count_threshold	natural	C_CMD_QUEUE_COUNT_THRESHOLD	An alert will be issued if command queue exceeds this count. Used for early warning if command queue is almost full. Will be ignored if set to 0.
cmd_queue_count_threshold_severity	t_alert_level	C_CMD_QUEUE_COUNT_THRESHOLD_SEERITY	Severity of alert to be initiated if exceeding cmd_queue_count_threshold
result_queue_count_max	natural	C_RESULT_QUEUE_COUNT_MAX	Maximum number of unfetched results before result_queue is full
result_queue_count_threshold	natural	C_RESULT_QUEUE_COUNT_THRESHOLD	An alert will be issued if result queue exceeds this count. Used for early warning if result queue is almost full. Will be ignored if set to 0.
result_queue_count_threshold_severity	t_alert_level	C_RESULT_QUEUE_COUNT_THRESHOLD_SEVERITY	Severity of alert to be initiated if exceeding result_queue_count_threshold
bfm_config	t_wishbone_bfm_config	C_WISHBONE_BFM_CONFIG_DEFAULT	Configuration for the Wishbone BFM
msg_id_panel	t_msg_id_panel	C_VVC_MSG_ID_PANEL_DEFAULT	VVC dedicated message ID panel. See Scope of Verbosity Control for how to use verbosity control.
unwanted_activity_severity	t_alert_level	C_UNWANTED_ACTIVITY_SEVERITY	Severity of alert to be issued if unwanted activity on the DUT outputs is detected. It is enabled with ERROR severity by default.

Note

cmd/result queue parameters in the configuration record are unused and will be removed in v3.0, use instead the entity generic constants.

The configuration record can be accessed from the Central Testbench Sequencer through the shared variable array, e.g.

shared_wishbone_vvc_config(C_VVC_IDX).inter_bfm_delay.delay_in_time := 50 ns;
shared_wishbone_vvc_config(C_VVC_IDX).bfm_config.id_for_bfm := ID_BFM;

Status Record

vvc_status accessible via shared_wishbone_vvc_status

The current status of the VVC can be retrieved during simulation. This is achieved by reading from the shared variable from the test sequencer. The record contents can be seen below:

Record element	Type	Description
current_cmd_idx	natural	Command index currently running
previous_cmd_idx	natural	Previous command index to run
pending_cmd_idx	natural	Pending number of commands in the command queue

Methods

All VVC procedures are defined in vvc_methods_pkg.vhd (dedicated to this VVC).
See Common VVC Methods for procedures which are common to all VVCs.
It is also possible to send a multicast to all instances of a VVC with ALL_INSTANCES as parameter for vvc_instance_idx.
All parameters in brackets are optional.

wishbone_write()

Adds a write command to the Wishbone VVC executor queue, which will run as soon as all preceding commands have completed. When the command is scheduled to run, the executor calls the BFM wishbone_write() procedure.

wishbone_write(VVCT, vvc_instance_idx, addr, data, msg, [scope])

Object	Name	Dir.	Type	Description
signal	VVCT	inout	t_vvc_target_record	VVC target type compiled into each VVC in order to differentiate between VVCs
constant	vvc_instance_idx	in	integer	Instance number of the VVC
constant	addr	in	unsigned	The address of a SW accessible register
constant	data	in	std_logic_vector	The data value to be written to the addressed register
constant	msg	in	string	A custom message to be appended in the log/alert
constant	scope	in	string	Describes the scope from which the log/alert originates. Default value is C_VVC_CMD_SCOPE_DEFAULT.

-- Examples:
wishbone_write(WISHBONE_VVCT, 0, x"1000", x"40", "Set UART baud rate to 9600", C_SCOPE);

-- It is recommended to use constants to improve the readability of the code, e.g.:
wishbone_write(WISHBONE_VVCT, 0, C_ADDR_UART_BAUDRATE, C_BAUDRATE_9600, "Set UART baud rate to 9600");

wishbone_read()

Adds a read command to the Wishbone VVC executor queue, which will run as soon as all preceding commands have completed. When the command is scheduled to run, the executor calls the BFM wishbone_read() procedure.

The value read from DUT will not be returned in this procedure call since it is non-blocking for the sequencer/caller, but the read data will be stored in the VVC for a potential future fetch (see example with fetch_result below). If the data_routing is set to TO_SB, the read data will be sent to the Wishbone VVC dedicated scoreboard where it will be checked against the expected value (provided by the testbench).

wishbone_read(VVCT, vvc_instance_idx, addr, [data_routing,] msg, [scope])

Object	Name	Dir.	Type	Description
signal	VVCT	inout	t_vvc_target_record	VVC target type compiled into each VVC in order to differentiate between VVCs
constant	vvc_instance_idx	in	integer	Instance number of the VVC
constant	addr	in	unsigned	The address of a SW accessible register
constant	data_routing	in	t_data_routing	Selects the destination of the read data
constant	msg	in	string	A custom message to be appended in the log/alert
constant	scope	in	string	Describes the scope from which the log/alert originates. Default value is C_VVC_CMD_SCOPE_DEFAULT.

-- Examples:
wishbone_read(WISHBONE_VVCT, 0, x"1000", "Read UART baud rate", C_SCOPE);
wishbone_read(WISHBONE_VVCT, 0, x"1002", TO_SB, "Read UART RX and send to Scoreboard", C_SCOPE);

-- It is recommended to use constants to improve the readability of the code, e.g.:
wishbone_read(WISHBONE_VVCT, 0, C_ADDR_UART_BAUDRATE, "Read UART baud rate");

-- Example with fetch_result() call: Result is placed in v_result
variable v_cmd_idx : natural;                       -- Command index for the last read
variable v_result  : work.vvc_cmd_pkg.t_vvc_result; -- Result from read.
...
wishbone_read(WISHBONE_VVCT, 0, C_ADDR_UART_BAUDRATE, "Read from Peripheral 1");
v_cmd_idx := get_last_received_cmd_idx(WISHBONE_VVCT, 0);
await_completion(WISHBONE_VVCT, 0, v_cmd_idx, 1 us, "Wait for read to finish");
fetch_result(WISHBONE_VVCT, 0, v_cmd_idx, v_result, "Fetching result from read operation");

Hint

t_vvc_result is defined in the corresponding vvc_cmd_pkg.vhd for the VIP.

wishbone_check()

Adds a check command to the Wishbone VVC executor queue, which will run as soon as all preceding commands have completed. When the command is scheduled to run, the executor calls the BFM wishbone_check() procedure. The wishbone_check() procedure will perform a read operation, then check if the read data is equal to the expected data in the data parameter. If the read data is not equal to the expected data parameter, an alert with severity ‘alert_level’ will be issued. The read data will not be stored in this procedure.

wishbone_check(VVCT, vvc_instance_idx, addr, data, msg, [alert_level, [scope]])

Object	Name	Dir.	Type	Description
signal	VVCT	inout	t_vvc_target_record	VVC target type compiled into each VVC in order to differentiate between VVCs
constant	vvc_instance_idx	in	integer	Instance number of the VVC
constant	addr	in	unsigned	The address of a SW accessible register
constant	data	in	std_logic_vector	The expected data value to be read from the addressed register
constant	msg	in	string	A custom message to be appended in the log/alert
constant	alert_level	in	t_alert_level	Sets the severity for the alert. Default value is ERROR.
constant	scope	in	string	Describes the scope from which the log/alert originates. Default value is C_VVC_CMD_SCOPE_DEFAULT.

-- Examples:
wishbone_check(WISHBONE_VVCT, 0, x"1155", x"3B", "Check data from UART RX");
wishbone_check(WISHBONE_VVCT, 0, x"1155", x"3B", "Check data from UART RX", TB_ERROR, C_SCOPE):

-- It is recommended to use constants to improve the readability of the code, e.g.:
wishbone_check(WISHBONE_VVCT, 0, C_ADDR_UART_RX, C_UART_START_BYTE, "Check data from UART RX");

Activity Watchdog

The VVCs support a centralized VVC activity register which the activity watchdog uses to monitor the VVC activities. The VVCs will register their presence to the VVC activity register at start-up, and report when ACTIVE and INACTIVE, using dedicated VVC activity register methods, and trigger the global_trigger_vvc_activity_register signal during simulations. The activity watchdog is continuously monitoring the VVC activity register for VVC inactivity and raises an alert if no VVC activity is registered within the specified timeout period.

Include activity_watchdog(num_exp_vvc, timeout, [alert_level, [msg]]) in the testbench to start using the activity watchdog. Note that setting the exact number of expected VVCs in the VVC activity register can be omitted by setting num_exp_vvc = 0.

More information can be found in Essential Mechanisms - Activity Watchdog.

Transaction Info

This VVC supports transaction info, a UVVM concept for distributing transaction information in a controlled manner within the complete testbench environment. The transaction info may be used in many different ways, but the main purpose is to share information directly from the VVC to a DUT model.

Wishbone transaction info record fields. Transaction Type: t_base_transaction (BT) - accessible via **shared_wishbone_vvc_transaction_info.bt**
Info field	Type	Default	Description
operation	t_operation	NO_OPERATION	Current VVC operation, e.g. INSERT_DELAY, POLL_UNTIL, READ, WRITE
addr	unsigned(63 downto 0)	0x0	Address of the Wishbone read/write transaction
data	std_logic_vector(1023 downto 0)	0x0	Data for Wishbone read or write transaction
vvc_meta	t_vvc_meta	C_VVC_META_DEFAULT	VVC meta data of the executing VVC command
-> msg	string	“”	Message of executing VVC command
-> cmd_idx	integer	-1	Command index of executing VVC command
transaction_status	t_transaction_status	INACTIVE	Set to INACTIVE, IN_PROGRESS, FAILED or SUCCEEDED during a transaction

More information can be found in Essential Mechanisms - Distribution of Transaction Info.

Scoreboard

This VVC has built in Scoreboard functionality where data can be routed by setting the TO_SB parameter in supported method calls, i.e. wishbone_read(). Note that the data is only stored in the scoreboard and not accessible with the fetch_result() method when the TO_SB parameter is applied. The Wishbone scoreboard is accessible from the testbench as a shared variable WISHBONE_VVC_SB, located in the vvc_methods_pkg.vhd, e.g.

WISHBONE_VVC_SB.add_expected(C_WISHBONE_VVC_IDX, pad_wishbone_sb(v_expected), "Adding expected");

The Wishbone scoreboard is per default a 1024 bits wide standard logic vector. When sending expected data to the scoreboard, where the data width is smaller than the default scoreboard width, we recommend zero-padding the data with the pad_wishbone_sb() function, e.g.

WISHBONE_VVC_SB.add_expected(<Wishbone VVC instance number>, pad_wishbone_sb(<exp data>));

See the Bitvis VIP Scoreboard for a complete list of available commands and additional information. All of the listed Generic Scoreboard commands are available for the Wishbone VVC scoreboard using the WISHBONE_VVC_SB.

Unwanted Activity Detection

This VVC supports detection of unwanted activity from the DUT. This mechanism will give an alert if the DUT generates any unexpected bus activity. It assures that no data is output from the DUT when it is not expected, i.e. read/receive/check/expect VVC methods are not called. Once the VVC is inactive, it starts to monitor continuously on the DUT outputs. When unwanted activity is detected, the VVC issues an alert.

The unwanted activity detection can be configured from the central testbench sequencer, where the severity of alert can be changed to a different value. To disable this feature in the testbench, e.g.

shared_wishbone_vvc_config(C_VVC_INDEX).unwanted_activity_severity := NO_ALERT;

For Wishbone VVC, the unwanted activity detection is enabled by default with severity ERROR.

More information can be found in Essential Mechanisms - Unwanted Activity Detection.

Compilation

The Wishbone VVC must be compiled with VHDL-2008 or newer. It is dependent on the following libraries:

UVVM Utility Library (UVVM-Util)

UVVM VVC Framework

Bitvis VIP Scoreboard

Wishbone BFM

Before compiling the Wishbone VVC, assure that uvvm_util, uvvm_vvc_framework and bitvis_vip_scoreboard have been compiled.

See Essential Mechanisms - Compile Scripts for information about compile scripts.

Compile order for the Wishbone VVC
Compile to library	File	Comment
bitvis_vip_wishbone	wishbone_bfm_pkg.vhd	Wishbone BFM
bitvis_vip_wishbone	transaction_pkg.vhd	Wishbone transaction package with DTT types, constants, etc.
bitvis_vip_wishbone	vvc_cmd_pkg.vhd	Wishbone VVC command types and operations
bitvis_vip_wishbone	../uvvm_vvc_framework/src_target_dependent/td_target_support_pkg.vhd	UVVM VVC target support package, compiled into this VVC library
bitvis_vip_wishbone	../uvvm_vvc_framework/src_target_dependent/td_vvc_framework_common_methods_pkg.vhd	Common UVVM framework methods compiled into the this VVC library
bitvis_vip_wishbone	vvc_sb_pkg.vhd	Wishbone VVC scoreboard
bitvis_vip_wishbone	vvc_methods_pkg.vhd	Wishbone VVC methods
bitvis_vip_wishbone	../uvvm_vvc_framework/src_target_dependent/td_queue_pkg.vhd	UVVM queue package for this VVC
bitvis_vip_wishbone	../uvvm_vvc_framework/src_target_dependent/td_vvc_entity_support_pkg.vhd	UVVM VVC entity support compiled into this VVC library
bitvis_vip_wishbone	wishbone_vvc.vhd	Wishbone VVC
bitvis_vip_wishbone	vvc_context.vhd	Wishbone VVC context file

Simulator compatibility and setup

See Prerequisites for a list of supported simulators.
For required simulator setup see UVVM-Util Simulator compatibility and setup.

Additional Documentation

Important

This is a simplified Verification IP (VIP) for Wishbone.
The given VIP complies with the basic Wishbone protocol and thus allows a normal access towards a Wishbone interface.
This VIP is not a Wishbone protocol checker.
For a more advanced VIP please contact UVVM support at info@uvvm.org

Note

Disclaimer: This IP and any part thereof are provided “as is”, without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and non-infringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with this IP.