noptica-rs/glasgow-applet.diff

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diff --git a/software/glasgow/applet/all.py b/software/glasgow/applet/all.py
index 5aa86ea..715e5ec 100644
--- a/software/glasgow/applet/all.py
+++ b/software/glasgow/applet/all.py
@@ -43,3 +43,5 @@ from .video.rgb_input import VideoRGBInputApplet
from .video.vga_output import VGAOutputApplet
from .video.vga_terminal import VGATerminalApplet
from .video.ws2812_output import VideoWS2812OutputApplet
+
+from .logic import LogicApplet
diff --git a/software/glasgow/applet/logic.py b/software/glasgow/applet/logic.py
new file mode 100644
index 0000000..eabca52
--- /dev/null
+++ b/software/glasgow/applet/logic.py
@@ -0,0 +1,66 @@
+import sys
+import logging
+import asyncio
+from nmigen.compat import *
+
+from . import *
+
+
+class LogicSubtarget(Module):
+ def __init__(self, pads, in_fifo):
+ latch = Signal(4)
+
+ self.comb += [
+ in_fifo.din.eq(Cat(pads.d_t.i[:4], latch)),
+ ]
+
+ self.submodules.fsm = FSM()
+ self.fsm.act("CAPTURE-1",
+ NextValue(latch, pads.d_t.i),
+ NextState("CAPTURE-2")
+ )
+ self.fsm.act("CAPTURE-2",
+ in_fifo.we.eq(1),
+ NextState("CAPTURE-1")
+ )
+
+
+class LogicApplet(GlasgowApplet, name="logic"):
+ logger = logging.getLogger(__name__)
+ preview = True
+
+ @classmethod
+ def add_build_arguments(cls, parser, access):
+ super().add_build_arguments(parser, access)
+
+ access.add_pin_set_argument(parser, "d", required=True, width=range(5))
+
+ def build(self, target, args):
+ self.mux_interface = iface = target.multiplexer.claim_interface(self, args)
+ iface.add_subtarget(LogicSubtarget(
+ pads=iface.get_pads(args, pin_sets=("d",)),
+ in_fifo=iface.get_in_fifo(auto_flush=False),
+ ))
+
+ @classmethod
+ def add_run_arguments(cls, parser, access):
+ super().add_run_arguments(parser, access)
+
+ async def run(self, device, args):
+ return await device.demultiplexer.claim_interface(self, self.mux_interface, args)
+
+ @classmethod
+ def add_interact_arguments(cls, parser):
+ pass
+
+ async def interact(self, device, args, iface):
+ while True:
+ data = await iface.read(65536)
+ sys.stdout.buffer.write(data)
+
+# -------------------------------------------------------------------------------------------------
+
+class LogicAppletTestCase(GlasgowAppletTestCase, applet=LogicApplet):
+ @synthesis_test
+ def test_build(self):
+ self.assertBuilds()