Add support for cmod_a7 and cmod_s7 boards.

Signed-off-by: Bastian Löher <b.loeher@gsi.de>
Co-authored-by: Robin Heinemann <robin.ole.heinemann@gmail.com>

1 files changed, 86 insertions, 0 deletions

diff --git a/amaranth_boards/cmod_s7.py b/amaranth_boards/cmod_s7.py
new file mode 100644
index 0000000..8090ef6
--- /dev/null
+++ b/amaranth_boards/cmod_s7.py
@@ -0,0 +1,86 @@
+import os
+import subprocess
+
+from amaranth.build import *
+from amaranth.vendor.xilinx import *
+from .resources import *
+
+"""
+Example Usage:
+    platform = CModS7_Platform(toolchain="Symbiflow")
+    platform.build(Top(), do_program=True)
+
+Supported programmer:
+    openocd
+"""
+
+__all__ = ["CmodS7_Platform"]
+
+
+class CmodS7_Platform(XilinxPlatform):
+    device      = "xc7s25"
+    package     = "csga225"
+    speed       = "1"
+    default_clk = "clk12"
+    resources   = [
+        Resource("clk12", 0, Pins("M9", dir="i"),
+                 Clock(12e6), Attrs(IOSTANDARD="LVCMOS33")),
+
+        *LEDResources(pins="E2 K1 J1 E1", attrs=Attrs(IOSTANDARD="LVCMOS33")),
+
+        RGBLEDResource(0, r="F2", g="D3", b="F1", invert=True,
+            attrs=Attrs(IOSTANDARD="LVCMOS33")),
+
+        *ButtonResources(pins="D2 D1", attrs=Attrs(IOSTANDARD="LVCMOS33")),
+
+        UARTResource(0,
+            rx="L12", tx="K15",
+            attrs=Attrs(IOSTANDARD="LVCMOS33")
+        ),
+
+        # Clock only via STARTUPE2 primitive
+        *SPIFlashResources(0,
+            cs_n="L11", clk="F5", copi="H14", cipo="H15", wp_n="J12",
+            hold_n="K13",
+            attrs=Attrs(IOSTANDARD="LVCMOS33")
+        ),
+
+        # One-wire interface to crypto authentication device
+        # May not be populated on the board
+        Resource("atsha204a", 0, Pins("D17", dir="io"),
+            Attrs(IOSTANDARD="LVCMOS33"))
+    ]
+    connectors  = [
+        Connector("pmod", 0, "J2 H2 H4 F3 - - H3 H1 G1 F4 - -"), # JA
+
+        # Pin 24/25 are VCC and GND
+        # Pin 32/33 are analog (XADC)
+        # Pin 9-15 and 34-39 do not exist
+        Connector("gpio", 0,
+            """
+            L1  M4  M3  N2  M2  P3  N3  P1  N1  -   -   -
+            -   -   -   P14 P15 N13 N15 N14 M15 M14 L15 -
+            -   L14 K14 J15 L13 M13 J11 -   -   -   -   -
+            -   -   -   C5  A2  B2  B1  C1  B3  B4  A3  A4
+            """),
+
+        Connector("xadc", 0, {
+            "vaux5_n":   "A13",
+            "vaux5_p":   "A14",
+            "vaux12_n":  "A11",
+            "vaux12_p":  "A12"
+        })
+    ]
+
+    def toolchain_program(self, products, name):
+        with products.extract("{}.bit".format(name)) as bitstream_filename:
+            subprocess.check_call(["openFPGALoader",
+                "-c", "digilent",
+                "--fpga-part", "xc7s25",
+                "{}".format(bitstream_filename)
+            ])
+
+
+if __name__ == "__main__":
+    from .test.blinky import *
+    CmodS7_Platform().build(Blinky(), do_program=True)