mirror of https://github.com/m-labs/artiq
331 lines
10 KiB
Python
331 lines
10 KiB
Python
from artiq.experiment import *
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from artiq.coredevice.shuttler import shuttler_volt_to_mu
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DAC_Fs_MHZ = 125
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CORDIC_GAIN = 1.64676
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@portable
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def shuttler_phase_offset(offset_degree):
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return round(offset_degree / 360 * (2 ** 16))
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@portable
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def shuttler_freq_mu(freq_mhz):
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return round(float(2) ** 32 / DAC_Fs_MHZ * freq_mhz)
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@portable
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def shuttler_chirp_rate_mu(freq_mhz_per_us):
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return round(float(2) ** 32 * freq_mhz_per_us / (DAC_Fs_MHZ ** 2))
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@portable
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def shuttler_freq_sweep(start_f_MHz, end_f_MHz, time_us):
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return shuttler_chirp_rate_mu((end_f_MHz - start_f_MHz)/(time_us))
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@portable
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def shuttler_volt_amp_mu(volt):
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return shuttler_volt_to_mu(volt)
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@portable
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def shuttler_volt_damp_mu(volt_per_us):
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return round(float(2) ** 32 * (volt_per_us / 20) / DAC_Fs_MHZ)
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@portable
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def shuttler_volt_ddamp_mu(volt_per_us_square):
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return round(float(2) ** 48 * (volt_per_us_square / 20) * 2 / (DAC_Fs_MHZ ** 2))
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@portable
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def shuttler_volt_dddamp_mu(volt_per_us_cube):
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return round(float(2) ** 48 * (volt_per_us_cube / 20) * 6 / (DAC_Fs_MHZ ** 3))
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@portable
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def shuttler_dds_amp_mu(volt):
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return shuttler_volt_amp_mu(volt / CORDIC_GAIN)
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@portable
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def shuttler_dds_damp_mu(volt_per_us):
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return shuttler_volt_damp_mu(volt_per_us / CORDIC_GAIN)
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@portable
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def shuttler_dds_ddamp_mu(volt_per_us_square):
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return shuttler_volt_ddamp_mu(volt_per_us_square / CORDIC_GAIN)
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@portable
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def shuttler_dds_dddamp_mu(volt_per_us_cube):
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return shuttler_volt_dddamp_mu(volt_per_us_cube / CORDIC_GAIN)
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class Shuttler(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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self.setattr_device("core_dma")
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self.setattr_device("scheduler")
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self.shuttler0_leds = [ self.get_device("shuttler0_led{}".format(i)) for i in range(2) ]
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self.setattr_device("shuttler0_config")
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self.setattr_device("shuttler0_trigger")
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self.shuttler0_dcbias = [ self.get_device("shuttler0_dcbias{}".format(i)) for i in range(16) ]
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self.shuttler0_dds = [ self.get_device("shuttler0_dds{}".format(i)) for i in range(16) ]
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self.setattr_device("shuttler0_relay")
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self.setattr_device("shuttler0_adc")
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@kernel
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def record(self):
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with self.core_dma.record("example_waveform"):
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self.example_waveform()
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@kernel
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def init(self):
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self.led()
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self.relay_init()
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self.adc_init()
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self.shuttler_reset()
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@kernel
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def run(self):
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self.core.reset()
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self.core.break_realtime()
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self.init()
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self.record()
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example_waveform_handle = self.core_dma.get_handle("example_waveform")
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print("Example Waveforms are on OUT0 and OUT1")
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self.core.break_realtime()
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while not(self.scheduler.check_termination()):
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delay(1*s)
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self.core_dma.playback_handle(example_waveform_handle)
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@kernel
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def shuttler_reset(self):
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for i in range(16):
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self.shuttler_channel_reset(i)
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# To avoid RTIO Underflow
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delay(50*us)
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@kernel
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def shuttler_channel_reset(self, ch):
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self.shuttler0_dcbias[ch].set_waveform(
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a0=0,
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a1=0,
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a2=0,
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a3=0,
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)
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self.shuttler0_dds[ch].set_waveform(
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b0=0,
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b1=0,
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b2=0,
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b3=0,
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c0=0,
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c1=0,
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c2=0,
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)
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self.shuttler0_trigger.trigger(1 << ch)
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@kernel
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def example_waveform(self):
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# Equation of Output Waveform
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# w(t_us) = a(t_us) + b(t_us) * cos(c(t_us))
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# Step 1:
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# Enable the Output Relay of OUT0 and OUT1
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# Step 2: Cosine Wave Frequency Sweep from 10kHz to 50kHz in 500us
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# OUT0: b(t_us) = 1
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# c(t_us) = 2 * pi * (0.08 * t_us ^ 2 + 0.01 * t_us)
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# OUT1: b(t_us) = 1
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# c(t_us) = 2 * pi * (0.05 * t_us)
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# Step 3(after 500us): Cosine Wave with 180 Degree Phase Offset
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# OUT0: b(t_us) = 1
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# c(t_us) = 2 * pi * (0.05 * t_us) + pi
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# OUT1: b(t_us) = 1
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# c(t_us) = 2 * pi * (0.05 * t_us)
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# Step 4(after 500us): Cosine Wave with Amplitude Envelop
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# OUT0: b(t_us) = -0.0001367187 * t_us ^ 2 + 0.06835937 * t_us
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# c(t_us) = 2 * pi * (0.05 * t_us)
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# OUT1: b(t_us) = -0.0001367187 * t_us ^ 2 + 0.06835937 * t_us
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# c(t_us) = 0
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# Step 5(after 500us): Sawtooth Wave Modulated with 50kHz Cosine Wave
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# OUT0: a(t_us) = 0.01 * t_us - 5
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# b(t_us) = 1
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# c(t_us) = 2 * pi * (0.05 * t_us)
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# OUT1: a(t_us) = 0.01 * t_us - 5
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# Step 6(after 1000us): A Combination of Previous Waveforms
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# OUT0: a(t_us) = 0.01 * t_us - 5
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# b(t_us) = -0.0001367187 * t_us ^ 2 + 0.06835937 * t_us
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# c(t_us) = 2 * pi * (0.08 * t_us ^ 2 + 0.01 * t_us)
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# Step 7(after 500us): Mirrored Waveform in Step 6
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# OUT0: a(t_us) = 2.5 + -0.01 * (1000 ^ 2) * t_us
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# b(t_us) = 0.0001367187 * t_us ^ 2 - 0.06835937 * t_us
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# c(t_us) = 2 * pi * (-0.08 * t_us ^ 2 + 0.05 * t_us) + pi
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# Step 8(after 500us):
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# Disable Output Relay of OUT0 and OUT1
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# Reset OUT0 and OUT1
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## Step 1 ##
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self.shuttler0_relay.enable(0b11)
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## Step 2 ##
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start_f_MHz = 0.01
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end_f_MHz = 0.05
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duration_us = 500
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# OUT0 and OUT1 have their frequency and phase aligned at 500us
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self.shuttler0_dds[0].set_waveform(
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b0=shuttler_dds_amp_mu(1.0),
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b1=0,
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b2=0,
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b3=0,
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c0=0,
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c1=shuttler_freq_mu(start_f_MHz),
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c2=shuttler_freq_sweep(start_f_MHz, end_f_MHz, duration_us),
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)
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self.shuttler0_dds[1].set_waveform(
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b0=shuttler_dds_amp_mu(1.0),
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b1=0,
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b2=0,
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b3=0,
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c0=0,
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c1=shuttler_freq_mu(end_f_MHz),
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c2=0,
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)
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self.shuttler0_trigger.trigger(0b11)
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delay(500*us)
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## Step 3 ##
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# OUT0 and OUT1 has 180 degree phase difference
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self.shuttler0_dds[0].set_waveform(
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b0=shuttler_dds_amp_mu(1.0),
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b1=0,
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b2=0,
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b3=0,
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c0=shuttler_phase_offset(180.0),
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c1=shuttler_freq_mu(end_f_MHz),
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c2=0,
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)
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# Phase and Output Setting of OUT1 is retained
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# if the channel is not triggered or config is not cleared
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self.shuttler0_trigger.trigger(0b1)
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delay(500*us)
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## Step 4 ##
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# b(0) = 0, b(250) = 8.545, b(500) = 0
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self.shuttler0_dds[0].set_waveform(
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b0=0,
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b1=shuttler_dds_damp_mu(0.06835937),
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b2=shuttler_dds_ddamp_mu(-0.0001367187),
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b3=0,
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c0=0,
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c1=shuttler_freq_mu(end_f_MHz),
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c2=0,
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)
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self.shuttler0_dds[1].set_waveform(
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b0=0,
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b1=shuttler_dds_damp_mu(0.06835937),
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b2=shuttler_dds_ddamp_mu(-0.0001367187),
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b3=0,
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c0=0,
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c1=0,
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c2=0,
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)
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self.shuttler0_trigger.trigger(0b11)
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delay(500*us)
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## Step 5 ##
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self.shuttler0_dcbias[0].set_waveform(
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a0=shuttler_volt_amp_mu(-5.0),
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a1=int32(shuttler_volt_damp_mu(0.01)),
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a2=0,
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a3=0,
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)
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self.shuttler0_dds[0].set_waveform(
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b0=shuttler_dds_amp_mu(1.0),
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b1=0,
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b2=0,
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b3=0,
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c0=0,
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c1=shuttler_freq_mu(end_f_MHz),
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c2=0,
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)
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self.shuttler0_dcbias[1].set_waveform(
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a0=shuttler_volt_amp_mu(-5.0),
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a1=int32(shuttler_volt_damp_mu(0.01)),
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a2=0,
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a3=0,
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)
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self.shuttler0_dds[1].set_waveform(
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b0=0,
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b1=0,
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b2=0,
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b3=0,
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c0=0,
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c1=0,
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c2=0,
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)
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self.shuttler0_trigger.trigger(0b11)
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delay(1000*us)
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## Step 6 ##
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self.shuttler0_dcbias[0].set_waveform(
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a0=shuttler_volt_amp_mu(-2.5),
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a1=int32(shuttler_volt_damp_mu(0.01)),
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a2=0,
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a3=0,
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)
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self.shuttler0_dds[0].set_waveform(
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b0=0,
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b1=shuttler_dds_damp_mu(0.06835937),
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b2=shuttler_dds_ddamp_mu(-0.0001367187),
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b3=0,
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c0=0,
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c1=shuttler_freq_mu(start_f_MHz),
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c2=shuttler_freq_sweep(start_f_MHz, end_f_MHz, duration_us),
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)
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self.shuttler0_trigger.trigger(0b1)
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self.shuttler_channel_reset(1)
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delay(500*us)
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## Step 7 ##
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self.shuttler0_dcbias[0].set_waveform(
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a0=shuttler_volt_amp_mu(2.5),
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a1=int32(shuttler_volt_damp_mu(-0.01)),
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a2=0,
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a3=0,
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)
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self.shuttler0_dds[0].set_waveform(
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b0=0,
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b1=shuttler_dds_damp_mu(-0.06835937),
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b2=shuttler_dds_ddamp_mu(0.0001367187),
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b3=0,
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c0=shuttler_phase_offset(180.0),
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c1=shuttler_freq_mu(end_f_MHz),
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c2=shuttler_freq_sweep(end_f_MHz, start_f_MHz, duration_us),
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)
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self.shuttler0_trigger.trigger(0b1)
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delay(500*us)
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## Step 8 ##
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self.shuttler0_relay.enable(0)
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self.shuttler_channel_reset(0)
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self.shuttler_channel_reset(1)
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@kernel
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def led(self):
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for i in range(2):
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for j in range(3):
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self.shuttler0_leds[i].pulse(.1*s)
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delay(.1*s)
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@kernel
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def relay_init(self):
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self.shuttler0_relay.init()
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self.shuttler0_relay.enable(0x0000)
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@kernel
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def adc_init(self):
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delay_mu(int64(self.core.ref_multiplier))
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self.shuttler0_adc.power_up()
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delay_mu(int64(self.core.ref_multiplier))
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assert self.shuttler0_adc.read_id() >> 4 == 0x038d
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delay_mu(int64(self.core.ref_multiplier))
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# The actual output voltage is limited by the hardware, the calculated calibration gain and offset.
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# For example, if the system has a calibration gain of 1.06, then the max output voltage = 10 / 1.06 = 9.43V.
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# Setting a value larger than 9.43V will result in overflow.
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self.shuttler0_adc.calibrate(self.shuttler0_dcbias, self.shuttler0_trigger, self.shuttler0_config)
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