Add Lattice ECP5-5G Evaluation Board stub.

diff --git a/nmigen_boards/ecp5_5g_evn.py b/nmigen_boards/ecp5_5g_evn.py
new file mode 100644 (file)
index 0000000..b38e3ae
--- /dev/null
+++ b/nmigen_boards/ecp5_5g_evn.py
@@ -0,0 +1,63 @@
+import os
+import subprocess
+
+from nmigen.build import *
+from nmigen.vendor.lattice_ecp5 import *
+from .resources import *
+
+
+__all__ = ["ECP55GEVNPlatform"]
+
+
+class ECP55GEVNPlatform(LatticeECP5Platform):
+    device      = "LFE5UM5G-85F"
+    package     = "BG381"
+    speed       = "8"
+    default_clk = "clk12"
+    default_rst = "rst"
+    resources   = [
+        Resource("rst", 0, PinsN("G2", dir="i"), Attrs(IO_TYPE="LVCMOS33")),
+        Resource("clk12", 0, Pins("A10", dir="i"),
+                 Clock(12e6), Attrs(IO_TYPE="LVCMOS33")),
+
+        *LEDResources(pins="A13 A12 B19 A18 B18 C17 A17 B17",
+                      attrs=Attrs(IO_TYPE="LVCMOS33")),
+        *SwitchResources(pins="P4", invert=True,
+                         attrs=Attrs(IO_TYPE="LVCMOS33")),
+
+        # TODO: add other resources
+    ]
+    connectors  = [
+        # TODO: add connectors
+    ]
+
+    @property
+    def file_templates(self):
+        return {
+            **super().file_templates,
+            "{{name}}-openocd.cfg": r"""
+            interface ftdi
+            ftdi_device_desc "Lattice ECP5 Evaluation Board"
+            ftdi_vid_pid 0x0403 0x6010
+            ftdi_channel 0
+            ftdi_layout_init 0xfff8 0xfffb
+            reset_config none
+            adapter_khz 25000
+
+            jtag newtap ecp5 tap -irlen 8 -expected-id 0x81113043
+            """
+        }
+
+    def toolchain_program(self, products, name):
+        openocd = os.environ.get("OPENOCD", "openocd")
+        with products.extract("{}-openocd.cfg".format(name), "{}.svf".format(name)) \
+                as (config_filename, vector_filename):
+            subprocess.check_call([openocd,
+                "-f", config_filename,
+                "-c", "transport select jtag; init; svf -quiet {}; exit".format(vector_filename)
+            ])
+
+
+if __name__ == "__main__":
+    from .test.blinky import *
+    ECP55GEVNPlatform().build(Blinky(), do_program=True)