probe_delay :
A delay probe for a clock signal.

The probe_delay primitive measures the delay of an xbit-typed input (in) with respect to a reference input (trig) and records its waveform into a file.

The primitive uses a clk_to_delay primitive to measure the delay of the rising edge of in with respect to the rising edge of trig, and the parameters delay_trig, delay_in, skip_trig, and skip_in control which rising edges of the two inputs are to be compared with. For more information, refer to the documentation for the clk_to_delay primitive.

The parameter filename sets the name of the waveform file, of which extension determines the waveform format (e.g. “.jez” for JEZ and “.fsdb” for FSDB). In case of recording in JEZ format, the parameter format defines whether the data are recorded in a binary (“jezbinary”) or ascii (“jezascii”) format. The parameters start and stop define when the recording begins and ends, respectively.

Input/Output Terminals

Name	I/O	Type	Description
trig	input	xbit	reference trigger to measure the delay from
in	input	xbit	input pulse to measure the delay to

Parameters

Name	Type	Default	Unit	Description
filename	string	“xmodel.jez”	None	output filename
format	string	“jezbinary”	None	format version
start	real	0.0	seconds	abs. time to start recording
stop	real	-1.0	seconds	abs. time to stop recording
delay_trig	real	0.0	seconds	start delay for ‘trig’
delay_in	real	0.0	seconds	start delay for ‘in’
skip_trig	integer	0	None	edges to skip for ‘trig’
skip_in	integer	0	None	edges to skip for ‘in’