LimeSDR-mini-v2 Board definition file

Author: Godtec

amaranth_boards/limesdr_mini_v2.py

@@ -0,0 +1,97 @@
+import os
+import subprocess
+
+from amaranth.build import *
+from amaranth.vendor.lattice_ecp5 import *
+from .resources import *
+
+
+__all__ = ["LimeSDRminiv2Platform"]
+
+
+class LimeSDRminiv2Platform(LatticeECP5Platform):
+    device      = "LFE5U-45F"
+    package     = "MG285"
+    speed       = "6"
+    default_clk = "clk40"
+    #default_rst = "rst"
+
+    resources   = [
+        #Resource("rst", 0, PinsN("G2", dir="i"), Attrs(IO_TYPE="LVCMOS33")),
+        Resource("clk40", 0, Pins("A9", dir="i"),
+                 Clock(40e6), Attrs(IO_TYPE="LVCMOS33")),
+
+        *LEDResources(pins="R16 M18 T17 V17 R18 R17", invert=True, # Shared with GPIO pins GPIO 4-7
+                      attrs=Attrs(IO_TYPE="LVCMOS33")),
+        
+        # In order to use the UART as a UART you need to solder on a header,
+        # and potentially reconfigure the onboard FTDI chip, I used Pins GPIO0 and GPIO1 on J3
+        # Which translates to Pins FPGA N15 = FPGA_GPIO0 = TX, N18 = FPGA_GPIO1 = RX 
+        # Still needs to be done on my board to test, code is just a place holder...
+
+        UARTResource(0,
+            rx="N18", tx="N15",
+            #attrs=Attrs(IO_TYPE=bank6_iostandard, PULLMODE="UP")
+            attrs=Attrs(IO_TYPE="LVCMOS33", PULLMODE="UP")
+        ),
+        
+        # Have a question about RGB LEDS. Apparently the LimeSDR-mini-v2 only has 2 colour LEDS.
+        # not 3, so it's Red and Green, but creates yellow with both green and red.
+        # The RGB resource would need to be changed to relect that.
+        # Commented out for now.
+
+        #RGBLEDResource(0, r="V17", g="R16", b=" ", attrs=Attrs(IOSTANDARD="LVCMOS33")),
+        #RGBLEDResource(1, r="R18", g="M18", b=" ", attrs=Attrs(IOSTANDARD="LVCMOS33")),
+        #RGBLEDResource(2, r="R17", g="T17", b=" ", attrs=Attrs(IOSTANDARD="LVCMOS33")),
+        
+        *SPIFlashResources(0,
+            cs_n="U17", clk="U16", cipo="U18", copi="T18", attrs=Attrs(IO_TYPE="LVCMOS33")
+        ),
+
+
+        Resource("i2c", 0,
+            Subsignal("scl",        Pins("C10", dir="io")),
+            Subsignal("sda",        Pins("B9", dir="io")),
+            #Subsignal("scl_pullup", Pins("A14", dir="o")),
+            #Subsignal("sda_pullup", Pins("A13", dir="o")),
+            Attrs(IOSTANDARD="LVCMOS33")
+        )
+    ]
+
+        # TODO: add other resources
+    connectors  = [
+        # Expansion connectors
+        Connector("J", 39, "A10 A8"), #FPGA_EGIO 0 and 1 to keep Amaranth-Boards Happy..
+    ]
+
+    @property
+    def file_templates(self):
+        return {
+            **super().file_templates,
+            "{{name}}-openocd.cfg": r"""
+            adapter driver 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 speed 250000
+
+            jtag newtap ecp5 tap -irlen 8 -expected-id 0x41112043
+            """
+        }
+
+    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 *
+#    LimeSDRminiv2Platform().build(Blinky(), do_program=False)
+    LimeSDRminiv2Platform().build(Blinky(), do_program=True)