Changes between Version 2 and Version 3 of howto/XPS_to_PlanAhead

Timestamp:

Mar 4, 2014, 8:48:55 PM (10 years ago)

Author:

murphpo

Comment:

--

howto/XPS_to_PlanAhead

@@ -45 +45 @@
  1. Save the modified {{{xps_top.mhs}}}, then close XPS.
 
-If XPS throws an error,  you probably forgot to copy cores/code from the old XPS project. Also double check that your edk_user_repository is up to date and that the edk_user_repository is in the Global Peripheral Repository Search Path in the XPS preferences (see [wiki:edk_user_repository for more]).
+If XPS throws an error,  you probably forgot to copy cores/code from the old XPS project. Also double check that your edk_user_repository is up to date and that the edk_user_repository is in the Global Peripheral Repository Search Path in the XPS preferences (see [wiki:edk_user_repository edk_user_repository] for more).
 
-At this point your PlanAhead project has one source, the XPS project. You must now add a constraints file to the PlanAhead Project.
+At this point your PlanAhead project has one source, the XPS project. Unfortunately PlanAhead does not support XPS projects as top-level modules for implementation.
+
+ 1. In the PlanAhead Sources tab right-click on your XPS source and select '''Create Top HDL'''
+ 1. The sources tab will update to show a new hierarchy:
+[[Image(pa_src_top_hdl.png)]]
+ 1. Notice that the XPS project instance has been renamed {{{xps_top_i}}} - this is important for the next step
+
+You must now add a constraints file to the PlanAhead Project. Your constraints will be based on the top-level constraints from your source XPS project.
 
  1. In the PlanAhead workspace Sources tab, right-click and select ''''Add Sources'''
  1. Select '''Add or Create Constraints''' then click Next
+ 1. Click Create File and choose a filename. We'll use {{{xps_constraints}}} here.
+ 1. Click Ok, then Finish
+ 1. In the Sources tab expand the {{{Constraints/constrs_1}}} folder and double click your UCF file
+ 1. In another text editor open your source XPS project constraints file {{{<src_xps_proj>/data/system.ucf}}}
+ 1. Copy and paste the old file contents into the new UCF file in PlanAhead, then save the new file
+
+At this point your PlanAhead project constraints match the source XPS project constraints exactly.
+
+The PlanAhead-wrapped XPS project uses the same net names when connecting XPS ports to top-level pins. For constraints which refer to top-level nets, like {{{NET clk_in LOC = SOME_PIN}}}, no changes are required.
+
+For constraints which refer to nets or instances by hierarchical name, the new UCF must be udpated to reflect the XPS project instance name.