verdi仿真過程中特定時間段的波形的dump

假如進行功耗仿真，在u_module_a.a_int起來後到u_module_n.b_int起來後的這段時間所有子產品都在動作，即功耗值最大，那麼這段時間的仿真波形可以拿來進行功耗分析，以下的ucli設定用來隻收集這段時間内的仿真波形。

wave.do

的設定如下：

stop -once -condition harness.dut.u_module_a.a_int==1 -command { call \$fsdbDumpvars 0 "harness.dut" } -continue
stop -once -condition harness.dut.u_module_n.b_int==1 -command { call \$fsdbDumpFinish } -continue
run
           

指令的解釋如下：

STOP

Use this command to set breakpoints in the simulation (for example, simv). The simulation can be stopped based on certain condition(s) or certain event(s). You can use this command to specify an action to be taken after the tool has stopped.

Use this option to add conditional expression to an existing breakpoint. Only one condition per breakpoint is supported. The expression cannot reference dynamic or automatic data, and must be written in VHDL syntax. When a breakpoint triggers, the expression is evaluated. If the resulting value is a logical false, the simulation automatically continues.

Use this command to control how often breakpoints are triggered. By default, all the breakpoints points are triggered repeatedly. If you specify the -once option, then the tool stops only once for the breakpoint with stop id, stop-id.

Use this option to execute a Tcl script (which may contain additional UCLI commands) when the breakpoint associated with id, stop-id, is triggered.

You can use this option to continue simulation even after a breakpoint is triggered. By default, all the breakpoints are in halt state (i.e., simulation stops after the breakpoint is triggered) when the breakpoint is triggered.

CALL

Use this command to call SystemVerilog class methods ( functions or tasks with no delays) and Verilog tasks, functions, and procedures from UCLI. It executes the called method or procedure. Hierarchical referencing is not allowed for method or procedure.

Note:

• This command does not advance simulation time, if you call tasks with delay. Executable statements after delay elements in the routine will not be executed and call returns to UCLI.
• Since UCLI is Tcl based, curly braces ‘{’ and ‘}’ are needed as special characters like ‘$’ are interpreted as variables in Tcl. Instead of curly braces, ‘’ (backslash) can also be used.
• Curly braces are not needed if there are no special characters.
• To use call command, you must compile your design with any debug option (-debug_pp, -debug, or -debug_all).

STOP

This command advances the simulation until a breakpoint, $stop, or $finish is encountered or the specified simulation time is reached.

Syntax

run

run [time]

run [time [unit]]

run [-absolute|relative time [unit]]

run [-line ]

run [-line [-file ]]

run [-line [-instance <i_nid>]]

run [-line ][-thread ]

run [-posedge | rising ]

run [-negedge | falling ]

run [-change | event ]

run [-delta]

run [-0]

run [-nba]

example：

ucli% run -absolute 10ps
           

參考文獻：

1. ucli_ug.pdf