litex-boards/litex_boards/partner/platforms/fomu_pvt.py

77 lines
2.2 KiB
Python

# fomu pvt board from crowd funding
# design files at https://github.com/im-tomu/fomu-hardware/tree/pvt/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("C5")),
Subsignal("g", Pins("B5")),
Subsignal("b", Pins("A5")),
IOStandard("LVCMOS33")
),
# alias blue led
("user_led_n", 0, Pins("A5"), IOStandard("LVCMOS33")),
("usb", 0,
Subsignal("d_p", Pins("A1")),
Subsignal("d_n", Pins("A2")),
Subsignal("pullup", Pins("A4")),
IOStandard("LVCMOS33")
),
("clk48", 0, Pins("F4"), IOStandard("LVCMOS33")),
# Adesto AT25SF161 - 16-Mbit - 2 megabyte
# Supports SPI Modes 0 and 3
# Supports Dual and Quad Output Read
#
("spiflash", 0,
Subsignal("cs_n", Pins("C1"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("D1"), IOStandard("LVCMOS33")),
Subsignal("mosi", Pins("F1"), IOStandard("LVCMOS33")),
Subsignal("miso", Pins("E1"), IOStandard("LVCMOS33")),
Subsignal("wp", Pins("F2"), IOStandard("LVCMOS33")),
Subsignal("hold", Pins("B1"), IOStandard("LVCMOS33")),
),
("spiflash4x", 0,
Subsignal("cs_n", Pins("C1"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("D1"), IOStandard("LVCMOS33")),
Subsignal("dq", Pins("E1 F1 F2 B1"), IOStandard("LVCMOS33")),
),
]
_connectors = [
# Pins
# Pin 1
# Pin 2
# Pin 3
# Pin 4
("touch_pins", "E4 D5 E5 F5"),
]
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, 1megabytes
spiflash_page_size = 256
spiflash_sector_size = 0x10000
def __init__(self):
LatticePlatform.__init__(
self, "ice40-up5k-uwg30", _io, _connectors, toolchain="icestorm")
def create_programmer(self):
return IceStormProgrammer()