Print drivers along with current driving values for an HDL wire or signal object
Syntax
report_drivers [‑quiet] [‑verbose] <hdl_object>
Usage
Name | Description |
---|---|
[-quiet]
|
Ignore command errors |
[-verbose]
|
Suspend message limits during command execution |
<hdl_object>
|
Which hdl_object to report |
Categories
Description
The report_drivers
command prints the name and value of the driving signal, as well as the current value of a signal type HDL object.
Use this command to determine what signal or process is driving the value on a specific HDL signal, or net object. A driver of a signal is the statement in the HDL source file that is performing assignment to the signal.
The output format of report_drivers
is as follows:
Drivers for <hdl_object>
<Value of HDL Object>: Net <Hierarchical name of the probed signal>
[ Declared Net : <The declared signal to which the probed signal is connected>]
<Value of Driver> : Driver <Hierarchical name of the HDL process containing
the driver> at <file_name>:<line number>
The values of signals returned by the report_drivers
command depend on the state of the simulation. In the following example, the report is run before and after simulation:
current_scope /testbench/dut
report_drivers leds_n[3:0]
Drivers for /testbench/dut/LEDS_n[3:0]
0 : Net /testbench/dut/LEDS_n[0]
Declared Net : /testbench/leds_n[3]
0 : Driver /testbench/dut/line__187 at C:/Data/sources/sinegen_demo.vhd:187
0 : Driver /testbench/dut/line__186 at C:/Data/sources/sinegen_demo.vhd:186
0 : Driver /testbench/dut/line__185 at C:/Data/sources/sinegen_demo.vhd:185
0 : Driver /testbench/dut/line__184 at C:/Data/sources/sinegen_demo.vhd:184
0 : Net /testbench/dut/LEDS_n[1]
Declared Net : /testbench/leds_n[2]
0 : Driver /testbench/dut/line__187 at C:/Data/sources/sinegen_demo.vhd:187
0 : Driver /testbench/dut/line__186 at C:/Data/sources/sinegen_demo.vhd:186
0 : Driver /testbench/dut/line__185 at C:/Data/sources/sinegen_demo.vhd:185
0 : Driver /testbench/dut/line__184 at C:/Data/sources/sinegen_demo.vhd:184
0 : Net /testbench/dut/LEDS_n[2]
Declared Net : /testbench/leds_n[1]
0 : Driver /testbench/dut/line__187 at C:/Data/sources/sinegen_demo.vhd:187
1 : Driver /testbench/dut/line__186 at C:/Data/sources/sinegen_demo.vhd:186
1 : Driver /testbench/dut/line__185 at C:/Data/sources/sinegen_demo.vhd:185
1 : Driver /testbench/dut/line__184 at C:/Data/sources/sinegen_demo.vhd:184
X : Net /testbench/dut/LEDS_n[3]
Declared Net : /testbench/leds_n[0]
0 : Driver /testbench/dut/line__187 at C:/Data/sources/sinegen_demo.vhd:187
0 : Driver /testbench/dut/line__186 at C:/Data/sources/sinegen_demo.vhd:186
0 : Driver /testbench/dut/line__185 at C:/Data/sources/sinegen_demo.vhd:185
0 : Driver /testbench/dut/line__184 at C:/Data/sources/sinegen_demo.vhd:184
run all
report_drivers leds_n[3:0]
Drivers for /testbench/dut/LEDS_n[3:0]
0 : Net /testbench/dut/LEDS_n[0]
Declared Net : /testbench/leds_n[3]
0 : Driver /testbench/dut/line__187 at C:/Data/sources/sinegen_demo.vhd:187
0 : Driver /testbench/dut/line__186 at C:/Data/sources/sinegen_demo.vhd:186
0 : Driver /testbench/dut/line__185 at C:/Data/sources/sinegen_demo.vhd:185
0 : Driver /testbench/dut/line__184 at C:/Data/sources/sinegen_demo.vhd:184
1 : Net /testbench/dut/LEDS_n[1]
Declared Net : /testbench/leds_n[2]
0 : Driver /testbench/dut/line__187 at C:/Data/sources/sinegen_demo.vhd:187
0 : Driver /testbench/dut/line__186 at C:/Data/sources/sinegen_demo.vhd:186
0 : Driver /testbench/dut/line__185 at C:/Data/sources/sinegen_demo.vhd:185
0 : Driver /testbench/dut/line__184 at C:/Data/sources/sinegen_demo.vhd:184
0 : Net /testbench/dut/LEDS_n[2]
Declared Net : /testbench/leds_n[1]
1 : Driver /testbench/dut/line__187 at C:/Data/sources/sinegen_demo.vhd:187
1 : Driver /testbench/dut/line__186 at C:/Data/sources/sinegen_demo.vhd:186
1 : Driver /testbench/dut/line__185 at C:/Data/sources/sinegen_demo.vhd:185
1 : Driver /testbench/dut/line__184 at C:/Data/sources/sinegen_demo.vhd:184
0 : Net /testbench/dut/LEDS_n[3]
Declared Net : /testbench/leds_n[0]
0 : Driver /testbench/dut/line__187 at C:/Data/sources/sinegen_demo.vhd:187
0 : Driver /testbench/dut/line__186 at C:/Data/sources/sinegen_demo.vhd:186
1 : Driver /testbench/dut/line__185 at C:/Data/sources/sinegen_demo.vhd:185
0 : Driver /testbench/dut/line__184 at C:/Data/sources/sinegen_demo.vhd:184
This command returns a report of the drivers on the specified objects, or returns an error if it fails.
Arguments
-quiet
- (Optional) Execute the command quietly, returning no messages from the command. The command also returns TCL_OK regardless of any errors encountered during execution.
-verbose
- (Optional) Temporarily override any message limits and return all messages from this command.
set_msg_config
command.<hdl_objects> - Report the drivers of the specified VHDL signals or Verilog wires. The HDL objects can be specified by name, or returned by the get_objects
command.
Examples
The following example reports the drivers for the HDL objects returned by the get_objects
command:
report_drivers [get_objects leds_n]