boards/platforms: add nexys_video (basic)

diff --git a/litex/boards/platforms/nexys_video.py b/litex/boards/platforms/nexys_video.py
new file mode 100644 (file)
index 0000000..4c05c3c
--- /dev/null
+++ b/litex/boards/platforms/nexys_video.py
@@ -0,0 +1,76 @@
+# This file is Copyright (c) 2015 Florent Kermarrec <florent@enjoy-digital.fr>
+# License: BSD
+
+from litex.build.generic_platform import *
+from litex.build.xilinx import XilinxPlatform, XC3SProg, VivadoProgrammer
+
+_io = [
+    ("user_led", 0, Pins("T14"), IOStandard("LVCMOS25")),
+    ("user_led", 1, Pins("T15"), IOStandard("LVCMOS25")),
+    ("user_led", 2, Pins("T16"), IOStandard("LVCMOS25")),
+    ("user_led", 3, Pins("U16"), IOStandard("LVCMOS25")),
+    ("user_led", 4, Pins("V15"), IOStandard("LVCMOS25")),
+    ("user_led", 5, Pins("W16"), IOStandard("LVCMOS25")),
+    ("user_led", 6, Pins("W15"), IOStandard("LVCMOS25")),
+    ("user_led", 7, Pins("Y13"), IOStandard("LVCMOS25")),
+
+    ("user_sw", 0, Pins("E22"), IOStandard("LVCMOS12")),
+    ("user_sw", 1, Pins("F21"), IOStandard("LVCMOS12")),
+    ("user_sw", 2, Pins("G21"), IOStandard("LVCMOS12")),
+    ("user_sw", 3, Pins("G22"), IOStandard("LVCMOS12")),
+    ("user_sw", 4, Pins("H17"), IOStandard("LVCMOS12")),
+    ("user_sw", 5, Pins("J16"), IOStandard("LVCMOS12")),
+    ("user_sw", 6, Pins("K13"), IOStandard("LVCMOS12")),
+    ("user_sw", 7, Pins("M17"), IOStandard("LVCMOS12")),
+
+
+    ("user_btn", 0, Pins("B22"), IOStandard("LVCMOS12")),
+    ("user_btn", 1, Pins("D22"), IOStandard("LVCMOS12")),
+    ("user_btn", 2, Pins("C22"), IOStandard("LVCMOS12")),
+    ("user_btn", 3, Pins("D14"), IOStandard("LVCMOS12")),
+    ("user_btn", 4, Pins("F15"), IOStandard("LVCMOS12")),
+    ("user_btn", 5, Pins("G4"),  IOStandard("LVCMOS12")),
+
+    ("oled", 0,
+        Subsignal("dc",   Pins("W22")),
+        Subsignal("res",  Pins("U21")),
+        Subsignal("sclk", Pins("W21")),
+        Subsignal("sdin", Pins("Y22")),
+        Subsignal("vbat", Pins("P20")),
+        Subsignal("vdd",  Pins("V22")),
+        IOStandard("LVCMOS33")
+    ),
+
+    ("clk100", 0, Pins("R4"), IOStandard("LVCMOS33")),
+
+    ("serial", 0,
+        Subsignal("tx", Pins("AA19")),
+        Subsignal("rx", Pins("V18")),
+        IOStandard("LVCMOS33"),
+    )
+]
+
+
+class Platform(XilinxPlatform):
+    default_clk_name = "clk100"
+    default_clk_period = 10.0
+
+    def __init__(self, toolchain="vivado", programmer="vivado"):
+        XilinxPlatform.__init__(self, "xc7a200t-sbg484-1", _io,
+                                toolchain=toolchain)
+        self.toolchain.bitstream_commands = \
+            ["set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4 [current_design]"]
+        self.toolchain.additional_commands = \
+            ["write_cfgmem -force -format bin -interface spix4 -size 16 "
+             "-loadbit \"up 0x0 {build_name}.bit\" -file {build_name}.bin"]
+        self.programmer = programmer
+        self.add_platform_command("set_property INTERNAL_VREF 0.675 [get_iobanks 34]")
+
+    def create_programmer(self):
+        if self.programmer == "xc3sprog":
+            return XC3SProg("nexys4")
+        elif self.programmer == "vivado":
+            return VivadoProgrammer(flash_part="n25q128-3.3v-spi-x1_x2_x4")
+        else:
+            raise ValueError("{} programmer is not supported"
+                             .format(self.programmer))