46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
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def Get(ns, norflash0, uart0):
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constraints = []
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def add(signal, pin, vec=-1, iostandard="LVCMOS33", extra=""):
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constraints.append((ns.GetName(signal), vec, pin, iostandard, extra))
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def add_vec(signal, pins, iostandard="LVCMOS33", extra=""):
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i = 0
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for p in pins:
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add(signal, p, i, iostandard, extra)
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i += 1
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add_vec(norflash0.adr, ["L22", "L20", "K22", "K21", "J19", "H20", "F22",
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"F21", "K17", "J17", "E22", "E20", "H18", "H19", "F20",
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"G19", "C22", "C20", "D22", "D21", "F19", "F18", "D20", "D19"],
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extra="SLEW = FAST | DRIVE = 8")
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add_vec(norflash0.d, ["AA20", "U14", "U13", "AA6", "AB6", "W4", "Y4", "Y7",
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"AA2", "AB2", "V15", "AA18", "AB18", "Y13", "AA12", "AB12"],
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extra = "SLEW = FAST | DRIVE = 8 | PULLDOWN")
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add(norflash0.oe_n, "M22", extra="SLEW = FAST | DRIVE = 8")
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add(norflash0.we_n, "N20", extra="SLEW = FAST | DRIVE = 8")
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add(norflash0.ce_n, "M21", extra="SLEW = FAST | DRIVE = 8")
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add(norflash0.rst_n, "P22", extra="SLEW = FAST | DRIVE = 8")
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add(uart0.tx, "L17", extra="SLEW = SLOW")
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add(uart0.rx, "K18", extra="PULLUP")
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r = ""
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for c in constraints:
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r += "NET \"" + c[0]
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if c[1] >= 0:
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r += "(" + str(c[1]) + ")"
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r += "\" LOC = " + c[2]
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r += " | IOSTANDARD = " + c[3]
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if c[4]:
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r += " | " + c[4]
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r += ";\n"
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r += """
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NET "sys_clk" LOC = AB11 | IOSTANDARD = LVCMOS33;
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NET "sys_clk" TNM_NET = "GRPclk50";
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TIMESPEC "TSclk50" = PERIOD "GRPclk50" 20 ns HIGH 50%;
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NET "sys_rst" LOC = AA4 | IOSTANDARD = LVCMOS33;
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"""
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return r
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