113 lines
2.8 KiB
Python
113 lines
2.8 KiB
Python
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# Strongly inspired by the migen build of humpback
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# Using STM32 Nucleo-H743ZI2 board
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# Note to self: Pin assignment differs from Nucleo-H743ZI
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import os
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import subprocess
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from nmigen.build import *
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from nmigen.vendor.lattice_ice40 import *
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from nmigen_boards.resources import *
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from resources import *
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from pin_mapper import *
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__all__ = ["HumpbackPlatform"]
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class HumpbackPlatform(LatticeICE40Platform):
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device = "iCE40HX8K" # Using ICE40HX8K-CT256
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package = "CT256"
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default_clk = "clk25" # Point of deviation: Clock speed for humpback is fixed at 25MHz
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# Acquire GPIO mappings from gpio_mapper
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gpio_dict, global_gpio_dict = GPIOMapping()
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resources = [
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# Define clock
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Resource("clk25", 0, Pins("K9", dir="i"),
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Clock(25e6), Attrs(GLOBAL=True, IO_STANDARD="SB_LVCMOS")
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),
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# Define user LED
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Resource("user_led", 0, Pins("H3", dir="o"),
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Attrs(IO_STANDARD="SB_LVCMOS")
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),
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# Serial interfaces: Only including pins usable to STM32
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# Define UART interfaces
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# UART interface: There are no pull ups from humpback.
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# Need to configure STM32 pins to pull up.
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# Note: Use USART in asynchronous mode
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UARTResource(0,
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rx="T11", tx="M13", rts="M15", cts="T10",
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attrs=Attrs(IO_STANDARD="SB_LVCMOS", PULLUP=1)
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),
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# UART1 interface: Read note for UART interface above
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# UART1 interface is broken due to pin rearrangement introduced for Nucleo-H743ZI2
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# Uncomment if fixed, or found an alternative (e.g. bit banging UART)
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# *UARTResource(1,
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# tx="M11", rx="T13", rts="A6", cts="B16",
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# attrs=Attrs(IO_STANDARD="SB_LVCMOS", PULLUP=1)
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# ),
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# Define SPI interfaces
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# Note: Use "role=device" to make humpback a SPI slave
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# The ~CS pin is a global pin, but not being configured global.
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SPIResource(0,
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cs="R2", clk="C8", mosi="N5", miso="T2",
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attrs=Attrs(IO_STANDARD="SB_LVCMOS")
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),
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# Define I2C interface
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# Note: Need to program pull up in stm32
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# Use "role=device" to make humpback a I2C slave
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I2CResource(0,
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sda="T16", scl="M12",
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attrs=Attrs(IO_STANDARD="SB_LVCMOS", PULLUP=1)
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),
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# TODO:STM32 GPIO pins, ignore other unusable pins as well
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*GPIOResources(
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pins_dict = gpio_dict, dir = "o",
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attrs=Attrs(IO_STANDARD="SB_LVCMOS"),
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),
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*GPIOResources(
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pins_dict = global_gpio_dict, dir = "o",
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attrs=Attrs(GLOBAL=True, IO_STANDARD="SB_LVCMOS"),
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),
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]
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connectors = []
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# tool chain setup, using default ICE40 HX8K evaluation code
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def toolchain_program(self, products, name):
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iceprog = os.environ.get("ICEPROG", "iceprog")
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with products.extract("{}.bin".format(name)) as bitstream_filename:
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# TODO: this should be factored out and made customizable
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subprocess.check_call([iceprog, "-S", bitstream_filename])
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if __name__ == "__main__":
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from nmigen_boards.test.blinky import *
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HumpbackPlatform().build(Blinky(), do_program=False)
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