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

78 lines
2.3 KiB
Python

# This file is Copyright (c) 2019 Tom Keddie <git@bronwenandtom.com>
# License: BSD
# fomu hacker board
# schematic at https://github.com/im-tomu/fomu-hardware/tree/master/hacker/releases/v0.0-19-g154fecc
#
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")),
("user_touch_n", 0, Pins("F4"), IOStandard("LVCMOS33")),
("user_touch_n", 1, Pins("E5"), IOStandard("LVCMOS33")),
("user_touch_n", 2, Pins("E4"), IOStandard("LVCMOS33")),
("user_touch_n", 3, Pins("F2"), IOStandard("LVCMOS33")),
("usb", 0,
Subsignal("d_p", Pins("A4")),
Subsignal("d_n", Pins("A2")),
Subsignal("pullup", Pins("D5")),
IOStandard("LVCMOS33")
),
("clk48", 0, Pins("F5"), 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")),
),
]
_connectors = [
# Pins
# Pin 1 - F4 - Outside full square
# Pin 2 - E5
# Pin 3 - E4
# Pin 4 - F2 - Near notch on bottom
("touch_pins", "F4 E5 E4 F2"),
]
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()