215 lines
8.2 KiB
Python
215 lines
8.2 KiB
Python
import os
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import subprocess
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from amaranth.build import *
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from amaranth.vendor.xilinx_spartan_3_6 import *
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from .resources import *
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__all__ = ["MercuryPlatform"]
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class MercuryPlatform(XilinxSpartan3APlatform):
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"""
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Original Mercury Board from Micro-Nova: https://www.micro-nova.com
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Mercury Manual: https://www.micro-nova.com/s/mercury_rm.pdf
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Mercury Schematic: https://www.micro-nova.com/s/mercury_schematic.pdf
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The Mercury board is often paired with an extension board called the
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Baseboard, which provides an ample set of I/O for FPGA beginners.
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Baseboard Manual: https://www.micro-nova.com/s/baseboard_rm.pdf
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Baseboard Schematics: https://www.micro-nova.com/s/baseboard_schematic.pdf
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Mercury and Baseboard Resources: https://www.micro-nova.com/resources-mercury
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"""
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device = "xc3s200a"
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package = "vq100"
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speed = "4"
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default_clk = "clk50"
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resources = [
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Resource("clk50", 0, Pins("P43", dir="i"),
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Attrs(IOSTANDARD="LVCMOS33"), Clock(50e6)),
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Resource("button", 0, Pins("P41", dir="i"),
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Attrs(IOSTANDARD="LVTTL")),
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# The serial interface and flash memory have a shared SPI bus.
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# FPGA is secondary.
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SPIResource("spi_serial", 0, role="peripheral",
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cs_n="P39", clk="P53", copi="P46", cipo="P51",
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attrs=Attrs(IOSTANDARD="LVTTL"),
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),
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# FPGA is primary.
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*SPIFlashResources(0,
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cs_n="P27", clk="P53", copi="P46", cipo="P51",
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attrs=Attrs(IOSTANDARD="LVTTL")
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),
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# ADC over SPI- FPGA is primary.
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SPIResource("spi_adc", 0, role="controller",
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cs_n="P12", clk="P9", copi="P10", cipo="P21",
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attrs=Attrs(IOSTANDARD="LVTTL"),
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),
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# GPIO/SRAM Control
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# 5V tolerant GPIO is shared w/ the SRAM (on 200k gate devices) using
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# this pin. All GPIO except gpio:30 (and gpio:20, though see comment
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# under SRAMResource) interface to the SRAM. On assertion, this signal
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# will tristate the level-shifters, preventing any output on the 5V
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# GPIO pins (including gpio:30 and gpio:20).
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Resource("bussw_oe", 0, PinsN("P30N", dir="o"),
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Attrs(IOSTANDARD="LVTTL"))
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]
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# Perhaps define some connectors as having a specific purpose- i.e. a 5V GPIO
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# bus with data, peripheral-select, and control signals?
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connectors = [
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Connector("gpio", 0, """P59 P60 P61 P62 P64 P57
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P56 P52 P50 P49 P85 P84
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P83 P78 P77 P65 P70 P71
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P72 P73 P5 P4 P6 P98
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P94 P93 P90 P89 P88 P86"""), # 5V I/O- LVTTL.
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Connector("dio", 0, "P20 P32 P33 P34 P35 P36 P37"), # Fast 3.3V IO
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# (Directly attached to FPGA)- LVCMOS33.
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Connector("clkio", 0, "P40 P44"), # Clock IO (Can be used as GPIO)-
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# LVCMOS33.
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Connector("input", 0, "P68 P97 P7 P82"), # Input-only pins- LVCMOS33.
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Connector("led", 0, "P13 P15 P16 P19"), # LEDs can be used as pins
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# as well- LVTTL.
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Connector("pmod", 0, "P5 P4 P6 P98 P94 P93 P90 P89") # Baseboard PMOD.
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# Overlaps w/ GPIO bus.
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]
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# Some default useful extensions. Attach to platform using:
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# p.add_resources(p.leds)
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# pmod_btn = plat.request("led")
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leds = [
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Resource("led", 0, Pins("1", dir="o", conn=("led", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("led", 1, Pins("2", dir="o", conn=("led", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("led", 2, Pins("3", dir="o", conn=("led", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("led", 3, Pins("4", dir="o", conn=("led", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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]
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sram = [
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SRAMResource(0,
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cs_n="P3", we_n="gpio_0:29",
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# According to the schematic, A19/Pin 25 on the SRAM is wired to
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# gpio-0:20. However, according to the SRAM's datasheet, pin 25 is
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# a NC. Do not expose for now.
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a=""" gpio_0:1 gpio_0:2 gpio_0:3 gpio_0:4 gpio_0:5 gpio_0:6
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gpio_0:7 gpio_0:8 gpio_0:9 gpio_0:10 gpio_0:11 gpio_0:12
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gpio_0:13 gpio_0:14 gpio_0:15 gpio_0:16 gpio_0:17 gpio_0:18
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gpio_0:19""",
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d="""gpio_0:21 gpio_0:22 gpio_0:23 gpio_0:24 gpio_0:25 gpio_0:26
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gpio_0:27 gpio_0:28""",
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attrs=Attrs(IOSTANDARD="LVTTL", SLEW="FAST")
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)
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]
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# The "serial port" is in fact over SPI. The creators of the board provide
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# a VHDL file for talking over this interface. In light of space
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# constraints and the fact that both the FT245RL and FPGA can BOTH be
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# SPI primaries, however, it may be necessary to sacrifice two "high-speed"
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# (DIO, INPUT) pins instead.
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serial = [
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# RX: FTDI D0, TX: FTDI D1
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UARTResource(0, rx="input_0:1", tx="dio_0:1",
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attrs=Attrs(IOSTANDARD="LVCMOS33"))
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]
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# The remaining peripherals only make sense w/ the Baseboard installed.
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# See: http://www.micro-nova.com/mercury-baseboard/
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_switches = [
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Resource("switch", 0, Pins("1", dir="i", conn=("gpio", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("switch", 1, Pins("2", dir="i", conn=("gpio", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("switch", 2, Pins("3", dir="i", conn=("gpio", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("switch", 3, Pins("4", dir="i", conn=("gpio", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("switch", 4, Pins("5", dir="i", conn=("gpio", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("switch", 5, Pins("6", dir="i", conn=("gpio", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("switch", 6, Pins("7", dir="i", conn=("gpio", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("switch", 7, Pins("8", dir="i", conn=("gpio", 0)),
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Attrs(IOSTANDARD="LVTTL"))
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]
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_buttons = [
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Resource("button", 1, Pins("1", dir="i", conn=("input", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("button", 2, Pins("2", dir="i", conn=("input", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("button", 3, Pins("3", dir="i", conn=("input", 0)),
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Attrs(IOSTANDARD="LVTTL")),
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Resource("button", 4, Pins("4", dir="i", conn=("input", 0)),
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Attrs(IOSTANDARD="LVTTL"))
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]
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_vga = [
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VGAResource(0,
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r="dio_0:1 dio_0:2 dio_0:3",
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g="dio_0:4 dio_0:5 dio_0:6",
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b="dio_0:7 clkio_0:1",
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hs="led_0:3", vs="led_0:4", invert_sync=True,
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attrs=Attrs(IOSTANDARD="LVCMOS33", SLEW="FAST"))
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]
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_extclk = [
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Resource("extclk", 0, Pins("1", dir="i", conn=("clkio", 1)),
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Attrs(IOSTANDARD="LVCMOS33"))
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]
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_sevenseg = [
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Display7SegResource(0,
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a="gpio_0:13", b="gpio_0:14", c="gpio_0:15", d="gpio_0:16",
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e="gpio_0:17", f="gpio_0:18", g="gpio_0:19", dp="gpio_0:20",
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invert=True, attrs=Attrs(IOSTANDARD="LVTTL")
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),
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Resource("display_7seg_ctrl", 0,
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Subsignal("en", Pins("9 10 11 12", dir="o", conn=("gpio", 0))),
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Attrs(IOSTANDARD="LVTTL")
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)
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]
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_ps2 = [
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PS2Resource(0,
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clk="2", dat="1", conn=("led", 0), attrs=Attrs(IOSTANDARD="LVTTL")),
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]
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_audio = [
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Resource("audio", 0,
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Subsignal("l", Pins("30", dir="o", conn=("gpio", 0))),
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Subsignal("r", Pins("29", dir="o", conn=("gpio", 0))),
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Attrs(IOSTANDARD="LVTTL")
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)
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]
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baseboard_sram = _buttons + _vga + _extclk + _ps2
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baseboard_no_sram = baseboard_sram + _switches + _sevenseg + _audio
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def toolchain_program(self, products, name):
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# https://github.com/cr1901/mercpcl
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mercpcl = os.environ.get("MERCPCL", "mercpcl")
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with products.extract("{}.bin".format(name)) as bitstream_filename:
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subprocess.check_call([mercpcl, bitstream_filename])
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if __name__ == "__main__":
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from .test.blinky import *
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plat = MercuryPlatform()
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plat.add_resources(plat.leds)
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plat.build(Blinky(), do_program=True)
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