mirror of https://github.com/VLSIDA/OpenRAM.git
77 lines
3.5 KiB
Python
77 lines
3.5 KiB
Python
#!/usr/bin/env python
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import gdsMill
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#creater a streamer object to interact with the cadence libraries
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streamer = gdsMill.GdsStreamer()
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#use the streamer to take a cadence layout, and convert it to GDS 2 for us to work with
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#the GDS will be named testLayoutA.gds
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streamer.streamFromCadence(cadenceLibraryContainerPath = "/soe/bchen12/openram/branches/newptx/freepdk45/openram_temp",
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libraryName = "gdsMillTest",
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cellName = "testLayoutA",
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outputPath = "./gdsFiles")
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#create a layout object - this object represents all of the elements within the layout
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myLayout = gdsMill.VlsiLayout()
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#give our layout object to a gds reader object. The gds reader will look at the binary gds 2 file and
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#populate the layout object with the file's contents
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reader = gdsMill.Gds2reader(myLayout)
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#tell the reader object to process the gds file that we streamed in above
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#un-comment the next line to see some details about the gds contents
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#reader.debugToTerminal=1
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reader.loadFromFile("./gdsFiles/testLayoutA.gds")
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#our layout object now contains all of the elements of the layout
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#let add a box to the layout
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myLayout.addBox(layerNumber = myLayout.layerNumbersInUse[0], #pick some layer
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offsetInMicrons = (-10,0), #location
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width = 10.0, #units are microns
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height = 5.0,
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# updateInternalMap = True, #This is important for visualization - see note 1 below
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center = True) #origin is in the center or the bottom left corner
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#Note 1:the layout object keeps track of its elements in a 2D map (no hiearachy)
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#this makes visualization more efficient. Therefore, to do a PDF output or some other
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#flat output, you need to "update the internal map" of the layout object. Only do this
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# ONE TIME after all the objects you are manipulating are fixed
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#let's take out new layout and stream it back into a cadence library
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#first, create a new GDS
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#we change the root structure name (this will be the cellview name upon stream in)
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myLayout.rename("testLayoutB")
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writer = gdsMill.Gds2writer(myLayout)
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writer.writeToFile("./gdsFiles/testLayoutB.gds")
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streamer.streamToCadence(cadenceLibraryContainerPath = "~/design/600nmAmi",
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libraryName = "gdsMillTest",
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inputPath = "./gdsFiles/testLayoutB.gds")
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#let's create a PDF view of the layout object
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#first, create the object to represent the visual output
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visualizer = gdsMill.PdfLayout(myLayout)
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#since we have no knowledge of what the layer numbers mean for this particular technology
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#we need to assign some colors to them
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#uncomment the following line if you want to actually see the layout numbers in use
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#print myLayout.layerNumbersInUse
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#for each layer number used in the layout, we will asign it a layer color as a RGB Hex
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visualizer.layerColors[myLayout.layerNumbersInUse[0]]="#219E1C"
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visualizer.layerColors[myLayout.layerNumbersInUse[1]]="#271C9E"
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visualizer.layerColors[myLayout.layerNumbersInUse[2]]="#CC54C8"
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visualizer.layerColors[myLayout.layerNumbersInUse[3]]="#E9C514"
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visualizer.layerColors[myLayout.layerNumbersInUse[4]]="#856F00"
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visualizer.layerColors[myLayout.layerNumbersInUse[5]]="#BD1444"
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visualizer.layerColors[myLayout.layerNumbersInUse[6]]="#FD1444"
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visualizer.layerColors[myLayout.layerNumbersInUse[7]]="#FD1414"
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#set the scale so that our PDF isn't enormous
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visualizer.setScale(500)
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#tell the pdf layout object to draw everything in our layout
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visualizer.drawLayout()
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#and finally, dump it out to a file
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visualizer.writeToFile("./gdsFiles/gdsOut.pdf")
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