Add support for Tang Nano 9k.

Co-authored-by: Bastian Löher <b.loeher@gsi.de>

Author: whitequark

amaranth_boards/tang_nano_9k.py

@@ -0,0 +1,74 @@
+import os
+import subprocess
+
+from amaranth.build import *
+from amaranth.vendor.gowin import *
+
+from .resources import *
+
+
+__all__ = ["TangNano9kPlatform"]
+
+
+class TangNano9kPlatform(GowinPlatform):
+    part          = "GW1NR-LV9QN88PC6/I5"
+    family        = "GW1NR-9C"
+    default_clk   = "clk27"
+    resources     = [
+        Resource("clk27", 0, Pins("52", dir="i"),
+                 Clock(27e6), Attrs(IO_TYPE="LVCMOS33")),
+
+        *ButtonResources(pins="3 4", invert=True,
+                         attrs=Attrs(IO_TYPE="LVCMOS33")),
+
+        *LEDResources(pins="10 11 13 14 15 16", invert=True,
+                      attrs=Attrs(IO_TYPE="LVCMOS33")),
+
+        UARTResource(0, rx="18", tx="17",
+            attrs=Attrs(PULL_MODE="UP", IO_TYPE="LVCMOS33")),
+
+        *SPIFlashResources(0,
+            cs_n="60", clk="59", copi="61", cipo="62",
+            attrs=Attrs(IO_TYPE="LVCMOS33")),
+
+        *SDCardResources(0,
+            clk="36", cmd="37", dat0="39", dat3="38", wp_n="-",
+            attrs=Attrs(IO_TYPE="LVCMOS33")),
+
+        Resource("lcd", 0,
+            Subsignal("clk", Pins("35", dir="o")),
+            Subsignal("hs", Pins("40", dir="o")),
+            Subsignal("vs", Pins("34", dir="o")),
+            Subsignal("de", Pins("33", dir="o")),
+            Subsignal("r", Pins("75 74 73 72 71", dir="o")),
+            Subsignal("g", Pins("70 69 68 57 56 55", dir="o")),
+            Subsignal("b", Pins("54 53 51 42 41", dir="o")),
+            Attrs(IO_TYPE="LVCMOS33", DRIVE=24)),
+
+        Resource("lcd_backlight", 0, Pins("86", dir="o"),
+                 Attrs(IO_TYPE="LVCMOS33")),
+
+        Resource("hdmi", 0,
+             Subsignal("clk", DiffPairs(p="69", n="68", dir="o")),
+             Subsignal("d", DiffPairs(p="71 73 75", n="70 72 74", dir="o")),
+             Attrs(IO_TYPE="LVCMOS33")),
+    ]
+    connectors = []
+
+    def toolchain_prepare(self, fragment, name, **kwargs):
+        overrides = {
+            "add_options":
+                "set_option -use_mspi_as_gpio 1 -use_sspi_as_gpio 1",
+            "gowin_pack_opts":
+                "--sspi_as_gpio --mspi_as_gpio"
+        }
+        return super().toolchain_prepare(fragment, name, **overrides, **kwargs)
+
+    def toolchain_program(self, products, name):
+        with products.extract("{}.fs".format(name)) as bitstream_filename:
+            subprocess.check_call(["openFPGALoader", "-b", "tangnano9k", bitstream_filename])
+
+
+if __name__ == "__main__":
+    from .test.blinky import *
+    TangNano9kPlatform().build(Blinky(), do_program=True)