mirror of
https://github.com/jonathanhogg/scopething
synced 2025-07-13 18:52:10 +01:00
Something that looks like it'll do logic capture
This commit is contained in:
107
scope.py
107
scope.py
@ -103,23 +103,30 @@ class Scope(vm.VirtualMachine):
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async def capture(self, channels=['A'], trigger_channel=None, trigger_level=None, trigger_type='rising', hair_trigger=False,
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period=1e-3, nsamples=1000, timeout=None, low=None, high=None, raw=False):
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channels = list(channels)
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if 'A' in channels and 'B' in channels:
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nsamples_multiplier = 2
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dual = True
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else:
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nsamples_multiplier = 1
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dual = False
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ticks = int(period / nsamples / nsamples_multiplier / self.capture_clock_period)
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for clock_mode in vm.ClockModes:
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if clock_mode.dual == dual and ticks in range(clock_mode.clock_low, clock_mode.clock_high + 1):
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break
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analog_channels = [channel for channel in channels if channel in {'A', 'B'}]
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logic = 'L' in channels
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ticks = int(period / nsamples / self.capture_clock_period)
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for capture_mode in vm.CaptureModes:
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if capture_mode.analog_channels == len(analog_channels) and capture_mode.logic_channels == logic:
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if ticks in range(capture_mode.clock_low, capture_mode.clock_high + 1):
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clock_scale = 1
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break
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elif capture_mode.clock_divide and ticks > capture_mode.clock_high:
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for clock_scale in range(2, 1<<16):
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test_ticks = int(period / nsamples / self.capture_clock_period / clock_scale)
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if test_ticks in range(capture_mode.clock_low, capture_mode.clock_high + 1):
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ticks = test_ticks
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break
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else:
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continue
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break
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else:
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raise RuntimeError(f"Unsupported clock period: {ticks}")
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if clock_mode.clock_max is not None and ticks > clock_mode.clock_max:
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ticks = clock_mode.clock_max
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nsamples = int(round(period / ticks / nsamples_multiplier / self.capture_clock_period))
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total_samples = nsamples * nsamples_multiplier
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buffer_width = self.capture_buffer_size // clock_mode.sample_width
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if capture_mode.clock_max is not None and ticks > capture_mode.clock_max:
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ticks = capture_mode.clock_max
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nsamples = int(round(period / ticks / self.capture_clock_period / clock_scale))
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total_samples = nsamples*2 if logic else nsamples
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buffer_width = self.capture_buffer_size // capture_mode.sample_width
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assert total_samples <= buffer_width
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if raw:
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@ -144,6 +151,8 @@ class Scope(vm.VirtualMachine):
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elif trigger_channel == 'B':
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kitchen_sink_a = vm.KitchenSinkA.ChannelBComparatorEnable
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spock_option |= vm.SpockOption.TriggerSourceB
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else:
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raise RuntimeError(f"Cannot trigger on channel {trigger_channel}")
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kitchen_sink_b = vm.KitchenSinkB.AnalogFilterEnable
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if self._generator_running:
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kitchen_sink_b |= vm.KitchenSinkB.WaveformGeneratorEnable
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@ -157,16 +166,21 @@ class Scope(vm.VirtualMachine):
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analog_enable |= 1
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if 'B' in channels:
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analog_enable |= 2
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logic_enable = 0
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for channel in range(8):
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if not ((channel == 4 and self._generator_running) or (channel == 6 and 'A' in channels) or (channel == 7 and 'B' in channels)):
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logic_enable |= 1<<channel
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async with self.transaction():
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await self.set_registers(TraceMode=clock_mode.TraceMode, BufferMode=clock_mode.BufferMode,
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SampleAddress=0, ClockTicks=ticks, ClockScale=1,
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TraceIntro=total_samples//2, TraceOutro=total_samples//2, TraceDelay=0,
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await self.set_registers(TraceMode=capture_mode.TraceMode, BufferMode=capture_mode.BufferMode,
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SampleAddress=0, ClockTicks=ticks, ClockScale=clock_scale,
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TraceIntro=nsamples//2, TraceOutro=nsamples//2, TraceDelay=0,
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Timeout=max(1, int(round((period*5 if timeout is None else timeout) / self.trigger_timeout_tick))),
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TriggerMask=0x7f, TriggerLogic=0x80, TriggerLevel=trigger_level, SpockOption=spock_option,
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TriggerIntro=trigger_intro, TriggerOutro=2 if hair_trigger else 4, Prelude=0,
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ConverterLo=lo, ConverterHi=hi,
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KitchenSinkA=kitchen_sink_a, KitchenSinkB=kitchen_sink_b, AnalogEnable=analog_enable)
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KitchenSinkA=kitchen_sink_a, KitchenSinkB=kitchen_sink_b,
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AnalogEnable=analog_enable, DigitalEnable=logic_enable)
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await self.issue_program_spock_registers()
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await self.issue_configure_device_hardware()
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await self.issue_triggered_trace()
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@ -174,25 +188,42 @@ class Scope(vm.VirtualMachine):
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code, timestamp = (int(x, 16) for x in await self.read_replies(2))
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if code != 2:
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break
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address = int((await self.read_replies(1))[0], 16) // nsamples_multiplier
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start_timestamp = timestamp - nsamples*ticks*clock_scale
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if start_timestamp < 0:
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start_timestamp += 1<<32
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timestamp += 1<<32
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address = int((await self.read_replies(1))[0], 16)
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traces = DotDict()
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if 't' in channels:
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traces.t = [t*self.capture_clock_period for t in range(timestamp-total_samples*ticks, timestamp, ticks*nsamples_multiplier)]
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channels.remove('t')
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for dump_channel, channel in enumerate(sorted(channels)):
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for dump_channel, channel in enumerate(sorted(analog_channels)):
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asamples = nsamples // len(analog_channels)
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async with self.transaction():
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await self.set_registers(SampleAddress=(address - nsamples) * nsamples_multiplier % buffer_width,
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DumpMode=vm.DumpMode.Native if clock_mode.sample_width == 2 else vm.DumpMode.Raw,
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DumpChan=dump_channel, DumpCount=nsamples, DumpRepeat=1, DumpSend=1, DumpSkip=0)
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await self.set_registers(SampleAddress=(address - total_samples) % buffer_width,
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DumpMode=vm.DumpMode.Native if capture_mode.sample_width == 2 else vm.DumpMode.Raw,
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DumpChan=dump_channel, DumpCount=asamples, DumpRepeat=1, DumpSend=1, DumpSkip=0)
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await self.issue_program_spock_registers()
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await self.issue_analog_dump_binary()
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data = await self._reader.readexactly(nsamples * clock_mode.sample_width)
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data = await self._reader.readexactly(asamples * capture_mode.sample_width)
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value_multiplier, value_offset = (1, 0) if raw else ((high-low), low+self.analog_offsets[channel])
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if clock_mode.sample_width == 2:
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data = struct.unpack(f'>{nsamples}h', data)
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traces[channel] = [(value/65536+0.5)*value_multiplier + value_offset for value in data]
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if capture_mode.sample_width == 2:
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data = struct.unpack(f'>{asamples}h', data)
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data = [(value/65536+0.5)*value_multiplier + value_offset for value in data]
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else:
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traces[channel] = [(value/256)*value_multiplier + value_offset for value in data]
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data = [(value/256)*value_multiplier + value_offset for value in data]
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traces[channel] = {(t+dump_channel*ticks*clock_scale)*self.capture_clock_period: value
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for (t, value) in zip(range(start_timestamp, timestamp, ticks*clock_scale*len(analog_channels)), data)}
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if logic:
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async with self.transaction():
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await self.set_registers(SampleAddress=(address - total_samples) % buffer_width,
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DumpMode=vm.DumpMode.Raw, DumpChan=128, DumpCount=nsamples, DumpRepeat=1, DumpSend=1, DumpSkip=0)
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await self.issue_program_spock_registers()
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await self.issue_analog_dump_binary()
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data = await self._reader.readexactly(nsamples)
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ts = [t*self.capture_clock_period for t in range(start_timestamp, timestamp, ticks*clock_scale)]
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for i in range(8):
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mask = 1<<i
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if logic_enable & mask:
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traces[f'L{i}'] = {t: 1 if value & mask else 0 for (t, value) in zip(ts, data)}
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return traces
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@ -273,10 +304,10 @@ class Scope(vm.VirtualMachine):
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await self.start_generator(1000, waveform='square')
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for low in np.linspace(0.063, 0.4, n):
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for high in np.linspace(0.877, 0.6, n):
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data = await self.capture(channels='AB', period=2e-3, trigger_level=0.5, nsamples=1000, low=low, high=high, raw=True)
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A = np.array(data['A'])
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data = await self.capture(channels='AB', period=2e-3, trigger_level=0.5, nsamples=2000, low=low, high=high, raw=True)
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A = np.fromiter(data['A'].values(), dtype='float')
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A.sort()
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B = np.array(data['B'])
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B = np.fromiter(data['B'].values(), dtype='float')
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B.sort()
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Azero, A3v3 = A[10:490].mean(), A[510:990].mean()
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Bzero, B3v3 = B[10:490].mean(), B[510:990].mean()
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@ -313,9 +344,9 @@ INFO:scope:Initialised scope, revision: BS000501
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In [2]: generate(2000, 'triangle')
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Out[2]: 2000.0
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In [3]: traces = capture('tA', low=0, high=3.3)
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In [3]: traces = capture('A', low=0, high=3.3)
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In [4]: plot(traces.t, traces.A)
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In [4]: plot(traces.A.keys(), traces.A.values())
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Out[4]: [<matplotlib.lines.Line2D at 0x114009160>]
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In [5]:
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@ -345,6 +376,6 @@ def generate(*args, **kwargs):
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if __name__ == '__main__':
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import sys
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logging.basicConfig(level=logging.INFO, stream=sys.stderr)
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logging.basicConfig(level=logging.DEBUG, stream=sys.stderr)
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asyncio.get_event_loop().run_until_complete(main())
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31
vm.py
31
vm.py
@ -137,18 +137,27 @@ class KitchenSinkB(IntEnum):
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AnalogFilterEnable = 0x80
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WaveformGeneratorEnable = 0x40
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ClockMode = namedtuple('ClockMode', ('clock_low', 'clock_high', 'clock_max', 'dual', 'sample_width',
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'TraceMode', 'BufferMode'))
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CaptureMode = namedtuple('CaptureMode', ('clock_low', 'clock_high', 'clock_max', 'analog_channels', 'sample_width',
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'logic_channels', 'clock_divide', 'TraceMode', 'BufferMode'))
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ClockModes = [
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ClockMode(40, 65536, None, False, 2, TraceMode.Macro, BufferMode.Macro),
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ClockMode(40, 65536, None, True, 2, TraceMode.MacroChop, BufferMode.MacroChop),
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ClockMode(15, 40, None, False, 1, TraceMode.Analog, BufferMode.Single),
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ClockMode(13, 40, None, True, 1, TraceMode.AnalogChop, BufferMode.Chop),
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ClockMode( 8, 14, None, False, 1, TraceMode.AnalogFast, BufferMode.Single),
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ClockMode( 8, 40, None, True, 1, TraceMode.AnalogFastChop, BufferMode.Chop),
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ClockMode( 2, 8, 5, False, 1, TraceMode.AnalogShot, BufferMode.Single),
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ClockMode( 4, 8, 5, True, 1, TraceMode.AnalogShotChop, BufferMode.Chop),
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CaptureModes = [
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CaptureMode(40, 65536, None, 1, 2, False, False, TraceMode.Macro, BufferMode.Macro),
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CaptureMode(40, 65536, None, 2, 2, False, False, TraceMode.MacroChop, BufferMode.MacroChop),
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CaptureMode(15, 40, None, 1, 1, False, True, TraceMode.Analog, BufferMode.Single),
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CaptureMode(13, 40, None, 2, 1, False, True, TraceMode.AnalogChop, BufferMode.Chop),
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CaptureMode( 8, 14, None, 1, 1, False, False, TraceMode.AnalogFast, BufferMode.Single),
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CaptureMode( 8, 40, None, 2, 1, False, False, TraceMode.AnalogFastChop, BufferMode.Chop),
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CaptureMode( 2, 7, 5, 1, 1, False, False, TraceMode.AnalogShot, BufferMode.Single),
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CaptureMode( 4, 7, 5, 2, 1, False, False, TraceMode.AnalogShotChop, BufferMode.Chop),
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CaptureMode( 5, 16384, None, 0, 1, True, False, TraceMode.Logic, BufferMode.Single),
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CaptureMode( 4, 4, None, 0, 1, True, False, TraceMode.LogicFast, BufferMode.Single),
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CaptureMode( 1, 3, None, 0, 1, True, False, TraceMode.LogicShot, BufferMode.Single),
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CaptureMode(15, 40, None, 1, 1, True, True, TraceMode.Mixed, BufferMode.Dual),
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CaptureMode(13, 40, None, 2, 1, True, True, TraceMode.MixedChop, BufferMode.ChopDual),
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CaptureMode( 8, 14, None, 1, 1, True, False, TraceMode.MixedFast, BufferMode.Dual),
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CaptureMode( 8, 40, None, 2, 1, True, False, TraceMode.MixedFastChop, BufferMode.ChopDual),
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CaptureMode( 2, 7, 5, 1, 1, True, False, TraceMode.MixedShot, BufferMode.Dual),
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CaptureMode( 4, 7, 5, 2, 1, True, False, TraceMode.MixedShotChop, BufferMode.ChopDual),
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]
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def encode(value, dtype):
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