Adding Conditions - 2023.2 English

Vivado Design Suite User Guide: Logic Simulation (UG900)

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2023.2 English

To add breakpoints based on a condition and output a diagnostic message, use the following commands:

add_condition <condition> <message> 

Using the Vivado IDE BFT example design, to stop when the wbClk signal and the reset are both active-High, issue the following command at start of simulation to print a diagnostic message and pause simulation when reset goes to 1 and wbClk goes to 1:

add_condition {reset == 1 && wbClk == 1} {puts "Reset went to high"; stop}

In the BFT example, the added condition causes the simulation to pause at 5 ns when the condition is met and "Reset went to high" is printed to the console. The simulator waits for the next step or run command to resume the simulation.

-notrace Option

Normally, when you execute the add_condition command, the specified Tcl commands also echo to the console, log file, and journal file. The -notrace switch causes those commands to execute silently, suppressing the commands (but not their output) from appearing in those three places.

For example, if you execute the following example command:

puts 'Hello'

the normal behavior of the above command would be to emit the following output in the console, log file, and journal file:

# puts ‘Hello’

When you execute -notrace switch, it produces only the following output: