def assemble_platform():
platform = ICEBreakerPlatform()
i2s_conn = ('pmod', 0)
seg7_conn = ('pmod', 1)
i2s = Resource(
'i2s',
0,
Subsignal('mclk', Pins('1', conn=i2s_conn, dir='o')),
Subsignal('lrck', Pins('2', conn=i2s_conn, dir='o')),
Subsignal('sck', Pins('3', conn=i2s_conn, dir='o')),
Subsignal('sd', Pins('4', conn=i2s_conn, dir='o')),
)
seg7 = Resource(
'seg7', 0,
Subsignal('segs', Pins('1 2 3 4 7 8 9', conn=seg7_conn, dir='o')),
Subsignal('digit', Pins('10', conn=seg7_conn, dir='o')))
midi = UARTResource(1,
rx='39',
tx='40',
attrs=Attrs(IO_STANDARD='SB_LVCMOS'))
dbg = Resource(
'dbg',
0,
Subsignal('dbg', Pins('7 8 9 10', conn=i2s_conn, dir='o')),
)
platform.add_resources((i2s, seg7, midi, dbg))
return platform
def buildAndRunTest(demo, resolution, seed, retime, program):
from nmigen_boards.icebreaker import ICEBreakerPlatform
platform = ICEBreakerPlatform()
add_gpdi_resources(platform)
synth_opts = ["-retime"] if retime else []
platform.build(demo(resolution),
do_program=program,
synth_opts=synth_opts,
nextpnr_opts=["--seed", seed])
def assemble_platform():
platform = ICEBreakerPlatform()
seg7_conn = ('pmod', 1)
seg7 = Resource(
'seg7', 0,
Subsignal('segs', Pins('1 2 3 4 7 8 9', conn=seg7_conn, dir='o')),
Subsignal('digit', Pins('10', conn=seg7_conn, dir='o')))
midi = UARTResource(1,
rx='39',
tx='40',
attrs=Attrs(IO_STANDARD='SB_LVCMOS'))
platform.add_resources((seg7, midi))
return platform
def find_freq(experiment, seed):
platform = ICEBreakerPlatform()
platform.build(experiment,
do_program=False,
synth_opts=["-relut"],
nextpnr_opts=[*"--placer heap --seed".split(),
str(seed)])
# Return second clock output line
found_once = False
with open('build/top.tim') as f:
for line in f:
if r"Max frequency for clock 'cd_sync_clk12_0__i" in line:
if found_once:
m = re.search(r' ([0-9.]+) MHz', line)
return float(m.group(1))
found_once = True
def get_platform() -> Platform:
from nmigen_boards.icebreaker import ICEBreakerPlatform
from amaranth.build.dsl import Resource, Pins, Attrs
platform = ICEBreakerPlatform()
# for IceBreaker board - comes from
# https://github.com/icebreaker-fpga/icebreaker-migen-examples/blob/master/uart/uart.py
#
# The debug pins are on the PMOD1A in the following order on the connector:
# 7 8 9 10 1 2 3 4
# Yes that means that the pins at the edge of the board come first
# and the pins further away from the edge second
platform.add_resources([
Resource("debug", 0, Pins("7 8 9 10 1 2 3 4",
dir="o",
conn=("pmod", 0)),
Attrs(IO_STANDARD="SB_LVCMOS"))
])
return platform
def build_and_program(pll_freq, sample_freq, depth):
platform = ICEBreakerPlatform()
platform.add_resources([
Resource(
'i2s',
0,
Subsignal('mclk', Pins('1', conn=('pmod', 0), dir='o')),
Subsignal('lrck', Pins('2', conn=('pmod', 0), dir='o')),
Subsignal('sck', Pins('3', conn=('pmod', 0), dir='o')),
Subsignal('sd', Pins('4', conn=('pmod', 0), dir='o')),
),
])
top = Top(pll_freq=pll_freq, sample_freq=sample_freq, depth=depth)
platform.build(top, do_program=True)
colorize = os.isatty(sys.stdout.fileno())
if colorize:
print('\33[1;41m')
print(
f'Buzzer w/ PLL = {pll_freq / 1_000_000} MHz, '
f'samples = {depth} x {sample_freq:,}',
end='')
print('\33[m\n' if colorize else '', flush=True)
def p():
# depth >4 leads to use of memory (4k primitive, see build/top.rpt)
top = Top(sim=False)
platform = ICEBreakerPlatform()
platform.build(top, do_program=True)
def out_proc():
seq = (0b00, 0b01, 0b11, 0b10)
yield iq_to_step_dir.iq.eq(0b00)
for _ in range(16):
for _ in range(4):
for iq in seq:
yield iq_to_step_dir.iq.eq(iq)
yield
yield
yield
yield
for _ in range(4):
for iq in seq[::-1]:
yield iq_to_step_dir.iq.eq(iq)
yield
yield
yield
yield
sim.add_sync_process(out_proc)
with sim.write_vcd("rotary_encoder.vcd", "rotary_encoder.gtkw",
traces=[iq_to_step_dir.iq,
iq_to_step_dir.step,
iq_to_step_dir.direction]):
sim.run()
else:
plat = ICEBreakerPlatform()
plat.add_resources(plat.break_off_pmod)
plat.add_resources(rotary_encoder_pmod)
plat.build(Top(), do_program=True)
uart_pins = platform.request('uart')
bad_led = platform.request('led', 0)
good_led = platform.request('led', 1)
digit_leds = [platform.request('led', i + 2) for i in range(5)]
m = Module()
uart_rx = UARTRx(divisor=uart_divisor)
recv_status = OneShot(duration=status_duration)
err_status = OneShot(duration=status_duration)
m.submodules += [uart_rx, recv_status, err_status]
m.d.comb += [
uart_rx.rx_pin.eq(uart_pins.rx),
recv_status.i_trg.eq(uart_rx.rx_rdy),
good_led.eq(recv_status.o_pulse),
err_status.i_trg.eq(uart_rx.rx_err),
bad_led.eq(err_status.o_pulse),
]
with m.If(uart_rx.rx_rdy):
m.d.sync += [
digit_leds[i].eq(uart_rx.rx_data == ord('1') + i)
for i in range(5)
]
return m
if __name__ == '__main__':
platform = ICEBreakerPlatform()
platform.add_resources(platform.break_off_pmod)
top = Top()
platform.build(top, do_program=True)
]
class Top(Elaboratable):
def __init__(self):
pass
def elaborate(self, platform):
bin_conv_ports = platform.request("bin_conv_ports")
b2d = Bin2Dec(8)
m = Module()
m.submodules.bin2dec = b2d
m.d.comb += [
b2d.i_bin.eq(bin_conv_ports.bin_value),
b2d.i_bin_stb.eq(bin_conv_ports.bin_stb),
bin_conv_ports.dec_digit.eq(b2d.o_digit),
bin_conv_ports.digit_rd.eq(b2d.o_digit_rd),
bin_conv_ports.conv_rd.eq(b2d.o_conv_rd),
]
return m
if __name__ == '__main__':
platform = ICEBreakerPlatform()
platform.add_resources(bin_conv_resources)
platform.build(Top(), do_program=True)
uart_rx.rx_pin.eq(uart_pins.rx),
recv_status.trg.eq(uart_rx.rx_rdy),
good_led.eq(recv_status.out),
err_status.trg.eq(uart_rx.rx_err),
bad_led.eq(err_status.out),
ones_segs.digit_in.eq(uart_rx.rx_data[:4]),
tens_segs.digit_in.eq(uart_rx.rx_data[4:]),
driver.segment_patterns[0].eq(ones_segs.segments_out),
driver.segment_patterns[1].eq(tens_segs.segments_out),
seg7_pins.eq(driver.seg7),
]
m.d.sync += [
driver.pwm.eq(driver.pwm | uart_rx.rx_rdy),
]
return m
if __name__ == '__main__':
platform = ICEBreakerPlatform()
conn = ('pmod', 1)
platform.add_resources([
Resource(
'seg7',
0,
Subsignal('segs', Pins('1 2 3 4 7 8 9', conn=conn, dir='o')),
Subsignal('digit', Pins('10', conn=conn, dir='o')),
),
])
top = Top()
platform.build(top, do_program=True)
self.leds = leds
def elaborate(self, _platform: Platform) -> Module:
m = Module()
# Timer
m.d.comb += self.period.eq(self.maxperiod)
with m.If(self.counter == 0):
m.d.sync += [
self.state_counter.eq(self.state_counter + 1),
self.counter.eq(self.period)
]
with m.Else():
m.d.sync += self.counter.eq(self.counter - 1)
# LEDs
m.d.comb += self.leds.oe.eq(~self.state_counter[0])
for i in range(len(self.leds.o)):
m.d.comb += self.leds.o[i].eq(self.state_counter[1])
return m
if __name__ == "__main__":
plat = ICEBreakerPlatform()
plat.add_resources(triled_pmod)
leds = plat.request("triled")
my_blinker = Blinker(leds, 10000000)
plan = plat.build(my_blinker, do_program=True)
m.d.comb += [
vga_pads.red.eq(still.red),
vga_pads.green.eq(still.green),
vga_pads.blue.eq(still.blue),
]
with m.Else():
m.d.comb += [
vga_pads.red.eq(test_pattern.red),
vga_pads.green.eq(test_pattern.green),
vga_pads.blue.eq(test_pattern.blue),
]
m.submodules.uart = uart = UARTLoopback(
uart_pads,
clk_freq=12e6,
baud_rate=115200,
)
m.d.comb += [
leds.eq(uart.rx_data[0:2]),
]
return m
if __name__ == '__main__':
top = PixtolicTop(color_depth=4)
platform = ICEBreakerPlatform()
platform.add_resources(vga_pmod)
products = platform.build(top, do_build=True, do_program=False)
platform.toolchain_program(products, 'top')
#!/usr/bin/env nmigen
from nmigen import *
from nmigen_boards.icebreaker import ICEBreakerPlatform
from nmigen_lib.blinker import Blinker
class Top(Elaboratable):
def elaborate(self, platform):
led = platform.request('user_led')
m = Module()
bink = Blinker(period=int(platform.default_clk_frequency))
m.submodules += bink
m.d.comb += led.eq(bink.led)
return m
if __name__ == '__main__':
platform = ICEBreakerPlatform()
platform.build(Top(), do_program=True)
pll = PLL(freq_in_mhz=freq_in_mhz, freq_out_mhz=pll_freq_mhz)
i2s = I2SOut(pll_freq)
buzzer = Buzzer(buzz_freq, i2s.sample_frequency)
m.domains += pll.domain # override the default 'sync' domain
m.submodules += [pll, buzzer, i2s]
m.d.comb += [
pll.clk_pin.eq(clk_pin),
buzzer.enable.eq(True),
buzzer.ack.eq(i2s.ack),
i2s.samples[0].eq(buzzer.sample),
i2s.samples[1].eq(buzzer.sample),
i2s.stb.eq(buzzer.stb),
i2s_pins.eq(i2s.i2s),
]
return m
if __name__ == '__main__':
platform = ICEBreakerPlatform()
platform.add_resources([
Resource(
'i2s',
0,
Subsignal('mclk', Pins('1', conn=('pmod', 0), dir='o')),
Subsignal('lrck', Pins('2', conn=('pmod', 0), dir='o')),
Subsignal('sck', Pins('3', conn=('pmod', 0), dir='o')),
Subsignal('sd', Pins('4', conn=('pmod', 0), dir='o')),
),
])
platform.build(Top(), do_program=True)
def g():
top = Top(sim=False)
platform = ICEBreakerPlatform()
print(verilog.convert(top, ports=[], platform=platform))
yield r.wren.eq(1)
yield
yield
def process():
yield from write(0x0010, 0x1111)
yield from read(0x0010)
self.assertEqual(0x1111, (yield r.data_out))
yield from write(0x4010, 0x2222)
yield from read(0x4010)
self.assertEqual(0x2222, (yield r.data_out))
yield from write(0xc010, 0xffff)
yield from read(0xc010)
self.assertEqual(0xffff, (yield r.data_out))
yield from read(0x0010)
self.assertEqual(0x1111, (yield r.data_out))
self.run_sim(process)
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('-g', '--generate', action='store_true', help='Generate Verilog for oscilator')
args = parser.parse_args()
if args.generate:
from nmigen_boards.icebreaker import ICEBreakerPlatform
print(verilog.convert(SinglePortRam(), platform=ICEBreakerPlatform()))
else:
unittest.main()
]
return m
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("-s", action="store_true", help="Simulate PDMDriver (for debugging).")
parser.add_argument("-g", type=float, default=2.2, help="Gamma exponent (default 2.2)")
args = parser.parse_args()
if args.s:
p = PDMDriver(8)
sim = pysim.Simulator(p)
sim.add_clock(1.0 / 12e6)
def out_proc():
for i in range(256):
yield p.pdm_in.eq(i)
yield
yield
yield
yield
sim.add_sync_process(out_proc)
with sim.write_vcd("drv.vcd", "drv.gtkw", traces=[p.pdm_in, p.pdm_out]):
sim.run()
else:
plat = ICEBreakerPlatform()
plat.build(Top(gamma=args.g), do_program=True)
def p():
# depth >4 leads to use of memory (4k primitive, see build/top.rpt)
top = Top(sim=False, sim_tx_cycle_accurate=False, xwidth=xwidth, nwidth=nwidth)
platform = ICEBreakerPlatform()
platform.build(top, do_program=True)
Subsignal('act', Pins('9', conn=pmod1, dir='o')),
Subsignal('clk', Pins('2', conn=pmod1, dir='o')),
),
])
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('-g',
'--generate',
action='store_true',
help='Generate Verilog for output')
args = parser.parse_args()
if args.generate:
platform = ICEBreakerPlatform()
add_gpdi_resources(platform)
class Top(Elaboratable):
def elaborate(self, plat):
gpdi = platform.request('gpdi')
m = Module()
rgb = RGB()
vt = VT()
go = GPDIOutput(gpdi, rgb, vt)
m.submodules += [rgb, vt, go]
return m
class VT(Elaboratable):
def __init__(self):
self.frame_start = Signal(
def g():
top = Top(sim=False, sim_tx_cycle_accurate=False, xwidth=xwidth, nwidth=nwidth)
platform = ICEBreakerPlatform()
print(verilog.convert(top, ports=[top.tx, top.rx], platform=platform))
m = Module()
# Rx signals are input, have to read always from Rx and write to Tx.
# uart Rx -> ext Tx
# ext Rx -> uart Tx
m.d.comb += [
ext_pins.tx.eq(uart_pins.rx),
uart_pins.tx.eq(ext_pins.rx),
]
return m
if __name__ == '__main__':
plat = ICEBreakerPlatform()
plat.add_resources(plat.break_off_pmod)
# The external IO pins to use
ext_io = [
Resource(
'ext_io',
0,
# External Input
Subsignal('rx', Pins('4', dir='i', conn=('pmod', 0)),
Attrs(IO_STANDARD="LVCMOS33", PULLUP=1)),
# External Output
Subsignal('tx', Pins('3', dir='o', conn=('pmod', 0)),
Attrs(IO_STANDARD="LVCMOS33", PULLUP=1)),
),
]
def elaborate(self, _platform):
m = Module()
with m.Switch(self.digit):
for n, seg_val in enumerate([
0b0111111, 0b0000110, 0b1011011, 0b1001111, 0b1100110,
0b1101101, 0b1111101, 0b0000111, 0b1111111, 0b1101111,
0b1110111, 0b1111100, 0b0111001, 0b1011110, 0b1111001,
0b1110001
]):
with m.Case(n):
m.d.sync += self.segments.eq(seg_val)
return m
if __name__ == "__main__":
# In this example, explicitly show the intermediate classes used to
# execute build() to demonstrate that a user can inspect
# each part of the build process (create files, execute, program,
# and create a zip file if you have a BuildPlan instance).
plat = ICEBreakerPlatform()
plat.add_resources(seven_seg_pmod)
# BuildPlan if do_build=False
# BuildProducts if do_build=True and do_program=False
# None otherwise.
plan = plat.build(Top(), do_build=False, do_program=False) # BuildPlan
products = plan.execute() # BuildProducts
plat.toolchain_program(products, "top") # Manally run the programmer.