# fomu evt board from from crowd funding # design files at https://github.com/im-tomu/fomu-hardware/tree/evt/hardware/pcb # from litex.build.generic_platform import * from litex.build.lattice import LatticePlatform from litex.build.lattice.programmer import IceStormProgrammer _io = [ ("rgb_led", 0, Subsignal("r", Pins("40")), Subsignal("g", Pins("39")), Subsignal("b", Pins("41")), IOStandard("LVCMOS33"), ), # alias blue led ("user_led_n", 0, Pins("41"), IOStandard("LVCMOS33")), ("user_btn_n", 0, Pins("42"), IOStandard("LVCMOS33")), ("user_btn_n", 1, Pins("38"), IOStandard("LVCMOS33")), ("serial", 0, Subsignal("rx", Pins("21")), Subsignal("tx", Pins("13"), Misc("PULLUP")), IOStandard("LVCMOS33") ), ("usb", 0, Subsignal("d_p", Pins("34")), Subsignal("d_n", Pins("37")), Subsignal("pullup", Pins("35")), Subsignal("pulldown", Pins("36")), IOStandard("LVCMOS33") ), ("spiflash", 0, Subsignal("cs_n", Pins("16"), IOStandard("LVCMOS33")), Subsignal("clk", Pins("15"), IOStandard("LVCMOS33")), Subsignal("miso", Pins("17"), IOStandard("LVCMOS33")), Subsignal("mosi", Pins("14"), IOStandard("LVCMOS33")), Subsignal("wp", Pins("18"), IOStandard("LVCMOS33")), Subsignal("hold", Pins("19"), IOStandard("LVCMOS33")), ), ("spiflash4x", 0, Subsignal("cs_n", Pins("16"), IOStandard("LVCMOS33")), Subsignal("clk", Pins("15"), IOStandard("LVCMOS33")), Subsignal("dq", Pins("14 17 19 18"), IOStandard("LVCMOS33")), ), ("clk48", 0, Pins("44"), IOStandard("LVCMOS33")), ] _connectors = [ ("touch_pins", "48 47 46 45"), ("pmoda_n", "28 27 26 23"), ("pmodb_n", "48 47 46 45"), ] class Platform(LatticePlatform): default_clk_name = "clk48" default_clk_period = 20.833 gateware_size = 0x20000 # FIXME: Create a "spi flash module" object in the same way we have SDRAM spiflash_model = "n25q32" spiflash_read_dummy_bits = 8 spiflash_clock_div = 2 spiflash_total_size = int((16/8)*1024*1024) # 16Mbit spiflash_page_size = 256 spiflash_sector_size = 0x10000 def __init__(self): LatticePlatform.__init__(self, "ice40-up5k-sg48", _io, _connectors, toolchain="icestorm") def create_programmer(self): return IceStormProgrammer()