Merge pull request #112 from cr1901/8k-b-evn

build/platforms: Add ice40_hx8k_b_evn from Migen.

litex/boards/platforms/ice40_hx8k_b_evn.py

@@ -0,0 +1,47 @@
+from litex.build.generic_platform import *
+from litex.build.lattice import LatticePlatform
+from litex.build.lattice.programmer import IceStormProgrammer
+
+
+_io = [
+    ("user_led", 0, Pins("B5"), IOStandard("LVCMOS33")),
+    ("user_led", 1, Pins("B4"), IOStandard("LVCMOS33")),
+    ("user_led", 2, Pins("A2"), IOStandard("LVCMOS33")),
+    ("user_led", 3, Pins("A1"), IOStandard("LVCMOS33")),
+    ("user_led", 4, Pins("C5"), IOStandard("LVCMOS33")),
+    ("user_led", 5, Pins("C4"), IOStandard("LVCMOS33")),
+    ("user_led", 6, Pins("B3"), IOStandard("LVCMOS33")),
+    ("user_led", 7, Pins("C3"), IOStandard("LVCMOS33")),
+
+    ("serial", 0,
+        Subsignal("rx", Pins("B10")),
+        Subsignal("tx", Pins("B12"), Misc("PULLUP")),
+        Subsignal("rts", Pins("B13"), Misc("PULLUP")),
+        Subsignal("cts", Pins("A15"), Misc("PULLUP")),
+        Subsignal("dtr", Pins("A16"), Misc("PULLUP")),
+        Subsignal("dsr", Pins("B14"), Misc("PULLUP")),
+        Subsignal("dcd", Pins("B15"), Misc("PULLUP")),
+        IOStandard("LVCMOS33"),
+    ),
+
+    ("spiflash", 0,
+        Subsignal("cs_n", Pins("R12"), IOStandard("LVCMOS33")),
+        Subsignal("clk", Pins("R11"), IOStandard("LVCMOS33")),
+        Subsignal("mosi", Pins("P12"), IOStandard("LVCMOS33")),
+        Subsignal("miso", Pins("P11"), IOStandard("LVCMOS33")),
+    ),
+
+    ("clk12", 0, Pins("J3"), IOStandard("LVCMOS33"))
+]
+
+
+class Platform(LatticePlatform):
+    default_clk_name = "clk12"
+    default_clk_period = 83.333
+
+    def __init__(self):
+        LatticePlatform.__init__(self, "ice40-hx8k-ct256", _io,
+                                 toolchain="icestorm")
+
+    def create_programmer(self):
+        return IceStormProgrammer()