def insert_pause_before(layer,
zJog_mm=100,
buttonPressMessage="Press to continue."):
"""
Jog up and wait on button press then resume.
This is done when the tilt motor is at its lowest.
"""
import numpy as np
tiltMoves = [x for x in layer if isinstance(x, FLP.TiltMove)]
bestAfter = np.argmax(np.cumsum([move.usteps for move in tiltMoves]))
lowestTiltMove_i = layer.index(tiltMoves[bestAfter])
insertBefore_i = None
zSpeed_usteps_per_s = None
zCurrent = None
for x in layer[:lowestTiltMove_i]:
if isinstance(x, FLP.ZFeedRate):
zSpeed_usteps_per_s = x.feedrate
if isinstance(x, FLP.ZCurrent):
zCurrent = x.current
for i in range(lowestTiltMove_i, len(layer)):
if isinstance(layer[i], FLP.WaitForMovesToComplete):
insertBefore_i = 1 + i
break
assert insertBefore_i is not None
# Now we know where the motors are stopped and tilt is at its lowest.
pauseCycle = FLP.Packets()
zJog_usteps = int(zJog_mm * FLP.ZMove.usteps_up_per_mm)
zJog_mmps = 10.0
pauseCycle.append(FLP.ZCurrent(FLP.ZCurrent.moving_current))
pauseCycle.append(FLP.ZFeedRate(zJog_mmps * abs(FLP.ZMove.usteps_up_per_mm)))
pauseCycle.append(FLP.ZMove(zJog_usteps))
pauseCycle.append(FLP.WaitForMovesToComplete())
pauseCycle.append(FLP.WaitButtonPress(buttonPressMessage))
pauseCycle.append(FLP.ZMove(-zJog_usteps))
pauseCycle.append(FLP.WaitForMovesToComplete())
# Restore settings:
pauseCycle.append(FLP.ZCurrent(zCurrent))
if zSpeed_usteps_per_s is not None:
pauseCycle.append(FLP.ZFeedRate(zSpeed_usteps_per_s))
newLayer = layer[:insertBefore_i] + pauseCycle + layer[insertBefore_i:]
return newLayer
def midi2flp(midifilename, quarternote_s=0.25, skip_leading_rests=True):
"""
Given a midi file, return a list of FLP.Packets objects, one for each track.
"""
mf = music21.midi.MidiFile()
mf.open(midifilename)
mf.read()
soundstream = music21.midi.translate.midiFileToStream(mf)
tracks = []
for track in soundstream.elements:
x = [
x for x in track.flat.elements
if isinstance(x, (music21.note.Note, music21.note.Rest))
]
pitchtime = []
for thing in x:
if isinstance(thing, music21.note.Rest):
pitchtime.append((0, float(thing.duration.quarterLength)))
else:
pitchtime.append((thing.pitch.frequency,
float(thing.duration.quarterLength)))
packets = F.Packets([
F.ZCurrent(80),
])
for i, (Hz, time) in enumerate(pitchtime):
time *= quarternote_s
if Hz == 0:
if i != 0 and skip_leading_rests: # Don't start with a rest.
packets.append(F.Dwell(s=time))
else:
ufreq = Hz * 8
packets += [
F.ZFeedRate(ufreq),
F.ZMove(-int(ufreq * 0.5 * float(time))),
F.WaitForMovesToComplete(),
F.ZMove(int(ufreq * 0.5 * float(time))),
F.WaitForMovesToComplete()
]
tracks.append(packets)
return tracks