Added spiflash1x pins, a method to create an SpiFlash instance and a note on a second UART channel of FT2232H

litex_boards/platforms/ecp5_evn.py

@@ -4,6 +4,7 @@
 from litex.build.generic_platform import *
 from litex.build.lattice import LatticePlatform
 from litex.build.lattice.programmer import OpenOCDJTAGProgrammer
+from litex.soc.cores.spi_flash import SpiFlash
 
 import os
 
@@ -43,6 +44,14 @@ _io = [
         Subsignal("dq",   Pins("W2 V2 Y2 W1"), IOStandard("LVCMOS33")),
     ),
 
+    ("spiflash1x", 0,
+        Subsignal("cs_n", Pins("R2"), IOStandard("LVCMOS33")),
+        Subsignal("mosi",   Pins("W2"), IOStandard("LVCMOS33")),
+        Subsignal("miso",   Pins("V2"), IOStandard("LVCMOS33")),
+        Subsignal("wp",     Pins("Y2"), IOStandard("LVCMOS33")),
+        Subsignal("hold",   Pins("W1"), IOStandard("LVCMOS33")),
+    ),
+
     ("clk200", 0,
         Subsignal("p", Pins("Y19")),
         Subsignal("n", Pins("W20")),
@@ -125,11 +134,20 @@ class Platform(LatticePlatform):
     def __init__(self, **kwargs):
         LatticePlatform.__init__(self, "LFE5UM5G-85F-8BG381", _io, _connectors, **kwargs)
 
+    def make_spiflash(self):
+        flash_pads = self.request("spiflash1x")
+
+        spiflash = SpiFlash(flash_pads, endianness="little", div=2, dummy=8)
+        spiflash.add_clk_primitive(self.device)
+        return spiflash
+
     def request(self, *args, **kwargs):
         if "serial" in args:
             print("R22 and R23 should be removed, two 0 Ω resistors shoud be "
             "populated on R34 and R35 and the FT2232H should be configured to "
             "UART with virtual COM on port B")
+            print("Make sure your on-board FT2232H can properly talk UART.")
+            print("Follow instructions here: https://github.com/trabucayre/fixFT2232_ecp5evn")
         if "ext_clk50" in args:
             print("an oscillator must be populated on X5")