forked from M-Labs/artiq
pdq2: pep8
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ea0773ccb5
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@ -24,7 +24,7 @@ try:
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written = self.dev.write(data)
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if written < 0:
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raise pylibftdi.FtdiError(written,
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self.dev.get_error_string())
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self.dev.get_error_string())
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return written
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def close(self):
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@ -82,31 +82,31 @@ class Pdq2:
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"""
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PDQ DAC (a.k.a. QC_Waveform)
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"""
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max_val = 1<<15 # signed 16 bit DAC
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max_val = 1 << 15 # signed 16 bit DAC
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max_out = 10.
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freq = 50e6 # samples/s
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max_time = 1<<16 # unsigned 16 bit timer
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freq = 50e6 # samples/s
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max_time = 1 << 16 # unsigned 16 bit timer
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num_dacs = 3
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num_frames = 8
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num_channels = 9
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max_data = 4*(1<<10) # 8kx16 8kx16 4kx16
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max_data = 4*(1 << 10) # 8kx16 8kx16 4kx16
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escape_char = b"\xa5"
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cordic_gain = 1.
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for i in range(16):
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cordic_gain *= np.sqrt(1 + 2**(-2*i))
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commands = {
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"RESET_EN": b"\x00",
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"RESET_DIS": b"\x01",
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"TRIGGER_EN": b"\x02",
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"TRIGGER_DIS": b"\x03",
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"ARM_EN": b"\x04",
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"ARM_DIS": b"\x05",
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"DCM_EN": b"\x06",
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"DCM_DIS": b"\x07",
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"START_EN": b"\x08",
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"START_DIS": b"\x09",
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}
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"RESET_EN": b"\x00",
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"RESET_DIS": b"\x01",
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"TRIGGER_EN": b"\x02",
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"TRIGGER_DIS": b"\x03",
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"ARM_EN": b"\x04",
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"ARM_DIS": b"\x05",
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"DCM_EN": b"\x06",
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"DCM_DIS": b"\x07",
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"START_EN": b"\x08",
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"START_DIS": b"\x09",
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}
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def __init__(self, serial=None):
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self.serial = serial
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@ -123,8 +123,8 @@ class Pdq2:
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return self.write(self.cmd(cmd))
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def escape(self, data):
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return data.replace(self.escape_char, self.escape_char +
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self.escape_char)
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return data.replace(self.escape_char,
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self.escape_char + self.escape_char)
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def write(self, *segments):
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"""
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@ -158,13 +158,13 @@ class Pdq2:
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if tr is None:
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tr = t
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dv = [interpolate.splev(tr[:-1], spline, der=i)
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for i in range(order + 1)]
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for i in range(order + 1)]
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# correct for adder chain latency
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correction_map = [
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(1, -1/2., 2),
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(1, -1/6., 3),
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(2, -1., 3),
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]
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(1, -1/2., 2),
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(1, -1/6., 3),
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(2, -1., 3),
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]
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for i, c, j in correction_map:
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if j >= len(dv):
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break
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@ -180,14 +180,14 @@ class Pdq2:
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frame.append((part >> 32).astype("<i2"))
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else:
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frame.append(part.astype("<" + dtype))
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frame = np.rec.fromarrays(frame) # interleave
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frame = np.rec.fromarrays(frame) # interleave
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logger.debug("frame %s dtype %s shape %s length %s",
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frame, frame.dtype, frame.shape, len(bytes(frame.data)))
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frame, frame.dtype, frame.shape, len(bytes(frame.data)))
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return bytes(frame.data)
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def frame(self, t, v, p=None, f=None,
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order=3, aux=None, shift=0, trigger=True, end=True,
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silence=False, stop=True, clear=True, wait=False):
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order=3, aux=None, shift=0, trigger=True, end=True,
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silence=False, stop=True, clear=True, wait=False):
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"""
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serialize frame data
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voltages in volts, times in seconds
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@ -204,17 +204,17 @@ class Pdq2:
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parts = []
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head = np.zeros(len(t) - 1, "<u2")
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head[:] |= length # 4
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head[:] |= length # 4
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if p is not None:
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head[:] |= 1<<4 # typ # 2
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head[0] |= trigger<<6 # 1
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head[-1] |= (not stop and silence)<<7 # 1
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head[:] |= 1 << 4 # typ # 2
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head[0] |= trigger << 6 # 1
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head[-1] |= (not stop and silence) << 7 # 1
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if aux is not None:
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head[:] |= aux[:len(head)]<<8 # 1
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head[:] |= shift<<9 # 4
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head[-1] |= (not stop and end)<<13 # 1
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head[0] |= clear<<14 # 1
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head[-1] |= (not stop and wait)<<15 # 1
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head[:] |= aux[:len(head)] << 8 # 1
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head[:] |= shift << 9 # 4
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head[-1] |= (not stop and end) << 13 # 1
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head[0] |= clear << 14 # 1
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head[-1] |= (not stop and wait) << 15 # 1
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parts.append((head, "u2"))
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t, tr, dt = self.line_times(t, shift)
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@ -243,19 +243,21 @@ class Pdq2:
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if stop:
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if p is not None:
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frame += struct.pack("<HH hiihih H ii", (15<<0) | (1<<4) |
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(silence<<7) | (end<<13) | (wait<<15),
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1, int(v[-1]*2**15), 0, 0, 0, 0, 0,
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int(p[-1]*2**16), int(f[-1]*2**31), 0)
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frame += struct.pack("<HH hiihih H ii", (15 << 0) | (1 << 4) |
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(silence << 7) |
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(end << 13) |
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(wait << 15),
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1, int(v[-1]*2**15), 0, 0, 0, 0, 0,
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int(p[-1]*2**16), int(f[-1]*2**31), 0)
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else:
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frame += struct.pack("<HH h", (2<<0) |
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(silence<<7) | (end<<13) | (wait << 15),
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1, int(v[-1]*2**15))
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frame += struct.pack("<HH h", (2 << 0) | (silence << 7) |
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(end << 13) | (wait << 15),
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1, int(v[-1]*2**15))
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return frame
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def line(self, dt, v=(), a=(), p=(), f=(), typ=0,
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silence=False, end=False, trigger=False, aux=False,
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clear=False):
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silence=False, end=False, trigger=False, aux=False,
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clear=False):
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raise NotImplementedError
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fmt = "<HH"
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parts = [0, int(round(dt*self.freq))]
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@ -292,7 +294,7 @@ class Pdq2:
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def add_mem_header(self, board, dac, data, adr=0):
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assert dac in range(self.num_dacs)
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head = struct.pack("<HHH", (board << 4) | dac,
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adr, adr + len(data)//2 - 1)
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adr, adr + len(data)//2 - 1)
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return head + data
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def multi_frame(self, times_voltages, channel, map=None, **kwargs):
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@ -17,37 +17,39 @@ def _main():
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Evaluates times and voltages, interpolates and uploads
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them.""")
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parser.add_argument("-s", "--serial", default=None,
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help="device (FT245R) serial string [first]")
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help="device (FT245R) serial string [first]")
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parser.add_argument("-c", "--channel", default=0, type=int,
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help="channel: 3*board_num+dac_num [%(default)s]")
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help="channel: 3*board_num+dac_num [%(default)s]")
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parser.add_argument("-f", "--frame", default=0, type=int,
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help="frame [%(default)s]")
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help="frame [%(default)s]")
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parser.add_argument("-e", "--free", default=False,
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action="store_true",
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help="software trigger [%(default)s]")
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action="store_true",
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help="software trigger [%(default)s]")
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parser.add_argument("-n", "--disarm", default=False,
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action="store_true",
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help="disarm group [%(default)s]")
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action="store_true",
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help="disarm group [%(default)s]")
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parser.add_argument("-t", "--times",
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default="np.arange(5)*1e-6",
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help="sample times (s) [%(default)s]")
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default="np.arange(5)*1e-6",
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help="sample times (s) [%(default)s]")
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parser.add_argument("-v", "--voltages",
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default="(1-np.cos(t/t[-1]*2*np.pi))/2",
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help="sample voltages (V) [%(default)s]")
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default="(1-np.cos(t/t[-1]*2*np.pi))/2",
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help="sample voltages (V) [%(default)s]")
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parser.add_argument("-o", "--order", default=3, type=int,
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help="interpolation (0: const, 1: lin, 2: quad, 3: cubic)"
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" [%(default)s]")
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help="interpolation"
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" (0: const, 1: lin, 2: quad, 3: cubic)"
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" [%(default)s]")
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parser.add_argument("-m", "--dcm", default=None, type=int,
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help="choose fast 100MHz clock [%(default)s]")
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help="choose fast 100MHz clock [%(default)s]")
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parser.add_argument("-x", "--demo", default=False, action="store_true",
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help="demo mode: pulse and chirp, 1V*ch+0.1V*frame [%(default)s]")
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help="demo mode: pulse and chirp,"
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" 1V*ch+0.1V*frame [%(default)s]")
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parser.add_argument("-p", "--plot", help="plot to file [%(default)s]")
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parser.add_argument("-d", "--debug", default=False,
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action="store_true", help="debug communications")
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action="store_true", help="debug communications")
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parser.add_argument("-r", "--reset", default=False,
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action="store_true", help="do reset before")
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action="store_true", help="do reset before")
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parser.add_argument("-b", "--bit", default=False,
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action="store_true", help="do bit test")
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action="store_true", help="do bit test")
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args = parser.parse_args()
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@ -87,8 +89,8 @@ def _main():
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f.append(b"".join([
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dev.frame(times, vi, order=args.order, end=False),
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dev.frame(2*times, voltages, pi, fi, trigger=False),
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#dev.frame(2*times, 0*vi+.1, 0*pi, 0*fi+1e6),
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#dev.frame(times, 0*vi, order=args.order, silence=True),
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# dev.frame(2*times, 0*vi+.1, 0*pi, 0*fi+1e6),
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# dev.frame(times, 0*vi, order=args.order, silence=True),
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]))
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board, dac = divmod(channel, dev.num_dacs)
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dev.write_data(dev.add_mem_header(board, dac, dev.map_frames(f)))
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@ -97,14 +99,15 @@ def _main():
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t = np.arange(2*16) * 1.
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v = [-1, 0, -1]
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for i in range(15):
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vi = 1<<i
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vi = 1 << i
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v.extend([vi - 1, vi])
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v = np.array(v)*dev.max_out/(1<<15)
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v = np.array(v)*dev.max_out/(1 << 15)
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t, v = t[:3], v[:3]
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#print(t, v)
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# print(t, v)
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for channel in range(dev.num_channels):
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dev.write_data(dev.multi_frame([(t, v)], channel=channel,
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order=0, map=map, shift=15, stop=False, trigger=False))
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order=0, map=map, shift=15,
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stop=False, trigger=False))
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else:
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tv = [(times, voltages)]
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map = [None] * dev.num_frames
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