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got it working, was a busted port

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saji 2024-04-27 01:49:10 -05:00
parent a7ba60b81f
commit a0e1dcbdb0
3 changed files with 76 additions and 48 deletions
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120
groovylight/hub75.py
View file

@ -4,6 +4,7 @@
from litex.build.generic_platform import Signal, Subsignal, Pins
from litex.build.io import FSM, Module
from litex.gen import If, NextState, NextValue
from migen import Cat
def make_hub75_iodevice(index, basename):
b = basename
@ -31,63 +32,90 @@ class Hub75Driver(Module):
self.addr = Signal(5)
self.latch = Signal()
self.output_en = Signal()
self.rgb = Signal(6)
self.rgb = Signal(6, reset=0b111010)
# clk-en acts as a gate.
clock_en = Signal()
self.clock_out = Signal()
# self.comb += self.clock_out.eq(self.phase & clock_en)
# clock counter increments.
self.sync += self.phase.eq(self.phase + 1)
# self.sync += If(self.phase == 1, If(clock_en, self.clock_out.eq(self.phase)).Else(self.clock_out.eq(0)))
self.sync += If(clock_en, self.clock_out.eq(self.phase)).Else(self.clock_out.eq(0))
self.fsm = fsm = FSM()
self.submodules += self.fsm
bcm_value = Signal(3)
self.comb += self.rgb.eq(0b111010)
counter = Signal(32)
counter = Signal(8)
fsm.act("ready",
NextValue(self.output_en, 1),
NextValue(self.pixnum, linedepth - 1),
NextValue(self.latch, 0),
If(self.phase == 1,
NextValue(self.addr, self.addr + 1),
NextValue(clock_en, 1),
NextState("transmit"),
fsm.act("WRITEROW",
self.output_en.eq(1),
If(counter < 256,
self.clock_out.eq(counter[0]),
NextValue(counter, counter + 1),
If(counter[0], NextValue(self.rgb, self.rgb + 3)),
).Else(
NextValue(counter, 0),
NextState("EXPOSE"),
),
# If((self.state_count == 7), NextValue(clock_en, ~clock_en)),
)
fsm.act("transmit",
If(self.phase == 1,
NextValue(self.pixnum, self.pixnum - 1),
If(self.pixnum == 0,
NextState("latch_delay"),
)
)
)
fsm.act("latch_delay",
NextValue(clock_en, 0),
If(self.phase == 1,
NextState("latchout")
)
)
fsm.act("latchout",
If(self.phase == 1,
NextValue(self.latch, 1),
NextValue(counter, 0),
NextState("done")
)
)
fsm.act("done",
NextValue(self.output_en, 0),
NextValue(self.latch, 0),
NextValue(counter, counter + 1),
If(counter == 255, NextState("ready"))
)
fsm.act("EXPOSE",
self.output_en.eq(0),
If(counter < (1000 << bcm_value),
NextValue(counter, counter + 1),
).Else(
NextValue(counter, 0),
NextState("LATCH"),
),
)
fsm.act("LATCH",
self.latch.eq(1),
NextValue(counter, 0),
If(bcm_value == 7,
NextValue(bcm_value, 0),
NextValue(self.addr, self.addr + 1),
).Else(NextValue(bcm_value, 1)),
NextState("WRITEROW"),
)
# fsm.act("ready",
# NextValue(self.output_en, 1),
# NextValue(self.pixnum, linedepth - 1),
# NextValue(self.latch, 0),
# If(self.phase == 1,
# NextValue(self.addr, self.addr + 1),
# NextValue(clock_en, 1),
# NextState("transmit"),
# ),
# # If((self.state_count == 7), NextValue(clock_en, ~clock_en)),
# )
# fsm.act("transmit",
# If(self.phase == 1,
# NextValue(self.pixnum, self.pixnum - 1),
# If(self.pixnum == 0,
# NextState("latch_delay"),
# )
# )
# )
# fsm.act("latch_delay",
# NextValue(clock_en, 0),
# If(self.phase == 1,
# NextState("latchout")
# )
# )
# fsm.act("latchout",
# If(self.phase == 1,
# NextValue(self.latch, 1),
# NextValue(counter, 0),
# NextState("done")
# )
# )
# fsm.act("done",
# NextValue(self.output_en, 0),
# NextValue(self.latch, 0),
# NextValue(counter, counter + 1),
# If(counter == 255, NextState("ready"))
# )
#

2
groovylight/platform/colorlight_5a_75b_8_0.py
View file

@ -113,7 +113,7 @@ class _CRG(LiteXModule):
# pll.create_clkout(self.cd_sdram, sys_clk_freq, phase=180)
pll.create_clkout(self.cd_sys2x, 2*sys_clk_freq)
pll.create_clkout(self.cd_sys2x_ps, 2*sys_clk_freq, phase=180)
pll.create_clkout(self.cd_hub, 30e6)
pll.create_clkout(self.cd_hub, 60e6)
sdram_clk = ClockSignal("sys2x_ps")

2
groovylight/soc.py
View file

@ -49,7 +49,7 @@ class GroovySoC(SoCCore):
self.mem_map["spiflash"] = 0x20000000
mod = SpiFlashModule(SpiNorFlashOpCodes.READ_1_1_1)
self.add_spi_flash(mode="1x", module=SpiFlashModule, with_master=False)
self.platform.add_extension(make_hub75_iodevice(0, "j4"))
self.platform.add_extension(make_hub75_iodevice(0, "j8"))
hub_io = self.platform.request("hub75_iodev", 0)
self.submodules.hub75 = hub75 = ClockDomainsRenamer("hub")(Hub75Driver())
self.comb += [