RELEASE 1.0

compiler/gdsMill/exampleUserDir/arrayDemo.py

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+#!/usr/bin/env python
+import gdsMill
+#we are going to make an array of instances of an existing layout
+#assume that we designed the "base cell" in cadence
+#step 1 is to stream it out of cadence into a GDS to work with
+#   creater a streamer object to interact with the cadence libraries
+streamer = gdsMill.GdsStreamer()
+
+#   use the streamer to take a cadence layout, and convert it to GDS 2 for us to work with
+#   the GDS will be named testLayoutA.gds
+#streamer.streamFromCadence(cadenceLibraryContainerPath = "~/design/600nmAmi",
+#                           libraryName = "gdsMillTest",
+#                           cellName = "testLayoutA",
+#                           outputPath = "./gdsFiles")
+
+#next, load our base cell layout from the GDS generated above
+arrayCellLayout = gdsMill.VlsiLayout()
+reader = gdsMill.Gds2reader(arrayCellLayout)
+reader.loadFromFile("./gdsFiles/testLayoutA.gds")
+
+##since we will be streaming into the same library that testLayout came from
+#let's rename it here so that we don't overwrite accidentally later
+arrayCellLayout.rename("arrayCell")
+
+#now create a new layout
+#be sure to assign a name, since this will be the root object in our hierarchy to which
+#all other objects are referenced
+newLayout = gdsMill.VlsiLayout(name="arrayExample")
+
+#now place an instnace of our top level layout into the filled layout
+#hierarchy looks like this:
+#   array example
+#       array cell layout
+#           layout elements
+#           layout elements
+#           layout elements
+#       cell instance
+#       cell instance
+#       cell instance
+#       connection elements .....
+
+#now create the array of instances
+for xIndex in range(0,10):
+    for yIndex in range(0,10):
+        if(yIndex%2 == 0):
+            mirror = "MX"
+        else:
+            mirror = "R0"
+        newLayout.addInstance(arrayCellLayout,
+                              offsetInMicrons = (xIndex*10.0,yIndex*15.0),
+                              mirror = mirror,
+                              rotate = 0.0)
+
+#add a "wire" that in a real example might be a power rail, data bus, etc.
+newLayout.addPath(layerNumber = newLayout.layerNumbersInUse[7],
+                  coordinates = [(-20.0,0.0),(25.0,0),(25.0,10.0)],
+                  width = 1.0)
+
+#add some text that in a real example might be an I/O pin
+newLayout.addText(text = "Hello",
+                  layerNumber = newLayout.layerNumbersInUse[5],
+                  offsetInMicrons = (0,0),
+                  magnification = 1,
+                  rotate = None)
+
+
+newLayout.prepareForWrite()
+
+#and now dump the filled layout to a new GDS file
+writer = gdsMill.Gds2writer(newLayout)
+writer.writeToFile("./gdsFiles/arrayLayout.gds")
+#and stream it into cadence
+#streamer.streamToCadence(cadenceLibraryContainerPath = "~/design/600nmAmi",
+#                         libraryName = "gdsMillTest",
+#                         inputPath = "./gdsFiles/arrayLayout.gds")