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Preserve register for signal tap debug

Markgel
Novice
149 Views

Unable to preserve register with no fan out using following:

 

set_instance_assignment -name PRESERVE_REGISTER ON -to reg1

set_instance_assignment -name PRESERVE_FANOUT_FREE_NODE ON -to reg1

similar result using assignment editor - can't find reg1 available at pre-synthesis

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1 Solution
Markgel
Novice
140 Views

solution found:

reg reg1 /*synthesis noprune */;

 

BR,

Mark.

View solution in original post

2 Replies
Markgel
Novice
141 Views

solution found:

reg reg1 /*synthesis noprune */;

 

BR,

Mark.

SyafieqS
Moderator
119 Views

Mark,


You may refer to below link for preserving register nodes using noprune in your hdl

https://www.intel.com/content/www/us/en/programmable/quartushelp/17.0/hdl/vlog/vlog_file_dir_noprune...


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