mirror of https://github.com/VLSIDA/OpenRAM.git
54 lines
1.4 KiB
Python
54 lines
1.4 KiB
Python
import os
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import gdsMill
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import tech
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import globals
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OPTS = globals.OPTS
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def snap_to_grid(offset):
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"""
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Changes the coodrinate to match the grid settings
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"""
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grid = tech.drc["grid"]
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x = offset[0]
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y = offset[1]
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# this gets the nearest integer value
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xgrid = int(round(round((x / grid), 2), 0))
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ygrid = int(round(round((y / grid), 2), 0))
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xoff = xgrid * grid
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yoff = ygrid * grid
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out_offset = [xoff, yoff]
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return out_offset
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def gds_pin_center(gdsPin):
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"""
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This returns the center of a pin shape
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"""
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boundary = gdsPin[2]
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return [0.5 * (boundary[0] + boundary[2]), 0.5 * (boundary[1] + boundary[3])]
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def auto_measure_libcell(pin_list, name, units, layer):
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"""
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Open a GDS file and find the pins in pin_list as text on a given layer.
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Return these as a set of properties including the cell width/height too.
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"""
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cell_gds = OPTS.openram_tech + "gds_lib/" + str(name) + ".gds"
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cell_vlsi = gdsMill.VlsiLayout(units=units)
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reader = gdsMill.Gds2reader(cell_vlsi)
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reader.loadFromFile(cell_gds)
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cell = {}
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measure_result = cell_vlsi.getLayoutBorder(layer)
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if measure_result == None:
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measure_result = cell_vlsi.measureSize(name)
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[cell["width"], cell["height"]] = measure_result
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for pin in pin_list:
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cell[str(pin)] = gds_pin_center(cell_vlsi.getPinShapeByLabel(str(pin)))
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return cell
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