litex/mibuild/platforms/versa.py

# This file is Copyright (c) 2013 Florent Kermarrec <florent@enjoy-digital.fr>
# License: BSD

from mibuild.generic_platform import *
from mibuild.lattice import LatticePlatform
from mibuild.lattice.programmer import LatticeProgrammer

_io = [
	("clk100", 0, Pins("L5"), IOStandard("LVDS25")),
	("rst_n", 0, Pins("A21"), IOStandard("LVCMOS33")),

	("user_led", 0, Pins("Y20"), IOStandard("LVCMOS33")),
	("user_led", 1, Pins("AA21"), IOStandard("LVCMOS33")),
	("user_led", 2, Pins("U18"), IOStandard("LVCMOS33")),
	("user_led", 3, Pins("U19"), IOStandard("LVCMOS33")),
	("user_led", 4, Pins("W19"), IOStandard("LVCMOS33")),
	("user_led", 5, Pins("V19"), IOStandard("LVCMOS33")),
	("user_led", 6, Pins("AB20"), IOStandard("LVCMOS33")),
	("user_led", 7, Pins("AA20"), IOStandard("LVCMOS33")),

	("user_dip_btn", 0, Pins("J7"), IOStandard("LVCMOS15")),
	("user_dip_btn", 1, Pins("J6"), IOStandard("LVCMOS15")),
	("user_dip_btn", 2, Pins("H2"), IOStandard("LVCMOS15")),
	("user_dip_btn", 3, Pins("H3"), IOStandard("LVCMOS15")),
	("user_dip_btn", 4, Pins("J3"), IOStandard("LVCMOS15")),
	("user_dip_btn", 5, Pins("K3"), IOStandard("LVCMOS15")),
	("user_dip_btn", 6, Pins("J2"), IOStandard("LVCMOS15")),
	("user_dip_btn", 7, Pins("J1"), IOStandard("LVCMOS15")),

	("serial", 0,
		Subsignal("tx", Pins("B11"), IOStandard("LVCMOS33")), # X4 IO0
		Subsignal("rx", Pins("B12"), IOStandard("LVCMOS33")), # X4 IO1
	),

	("eth_clocks", 0,
		Subsignal("tx", Pins("C12")),
		Subsignal("gtx", Pins("M2")),
		Subsignal("rx", Pins("L4")),
		IOStandard("LVCMOS33")
	),
	("eth", 0,
		Subsignal("rst_n", Pins("L3")),
		Subsignal("mdio", Pins("L2")),
		Subsignal("mdc", Pins("V4")),
		Subsignal("dv", Pins("M1")),
		Subsignal("rx_er", Pins("M4")),
		Subsignal("rx_data", Pins("M5 N1 N6 P6 T2 R2 P5 P3")),
		Subsignal("tx_en", Pins("V3")),
		Subsignal("tx_data", Pins("V1 U1 R3 P1 N5 N3 N4 N2")),
		Subsignal("col", Pins("R1")),
		Subsignal("crs", Pins("P4")),
		IOStandard("LVCMOS33")
	),

	("eth_clocks", 1,
		Subsignal("tx", Pins("M21")),
		Subsignal("gtx", Pins("M19")),
		Subsignal("rx", Pins("N19")),
		IOStandard("LVCMOS33")
	),
	("eth", 1,
		Subsignal("rst_n", Pins("R21")),
		Subsignal("mdio", Pins("U16")),
		Subsignal("mdc", Pins("Y18")),
		Subsignal("dv", Pins("U15")),
		Subsignal("rx_er", Pins("V20")),
		Subsignal("rx_data", Pins("AB17 AA17 R19 V21 T17 R18 W21 Y21")),
		Subsignal("tx_en", Pins("V22")),
		Subsignal("tx_data", Pins("W22 R16 P17 Y22 T21 U22 P20 U20")),
		Subsignal("col", Pins("N18")),
		Subsignal("crs", Pins("P19")),
		IOStandard("LVCMOS33")
	),
]

class Platform(LatticePlatform):
	default_clk_name = "clk100"
	default_clk_period = 10

	def __init__(self):
		LatticePlatform.__init__(self, "LFE3-35EA-6FN484C", _io)

	def do_finalize(self, fragment):
		LatticePlatform.do_finalize(self, fragment)
		try:
			self.add_period_constraint(self.lookup_request("eth_clocks", 0).rx, 8.0)
		except ConstraintError:
			pass
		try:
			self.add_period_constraint(self.lookup_request("eth_clocks", 1).rx, 8.0)
		except ConstraintError:
			pass
	def create_programmer(self):
		return LatticeProgrammer()