118 lines
4.3 KiB
Python
118 lines
4.3 KiB
Python
# ADAR_functions.py
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import pickle
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import numpy as np
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verbose = True
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def ADAR_init(beam):
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# Initialize the ADAR1000
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beam.reset() # Performs a soft reset of the device (writes 0x81 to reg 0x00)
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beam._ctrl.reg_write(
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0x400, 0x55
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) # This trims the LDO value to approx. 1.8V (to the center of its range)
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beam.sequencer_enable = False
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beam.beam_mem_enable = False # RAM control vs SPI control of the beam state, reg 0x38, bit 6. False sets bit high and SPI control
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beam.bias_mem_enable = False # RAM control vs SPI control of the bias state, reg 0x38, bit 5. False sets bit high and SPI control
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beam.pol_state = False # Polarity switch state, reg 0x31, bit 0. True outputs -5V, False outputs 0V
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beam.pol_switch_enable = (
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False # Enables switch driver for ADTR1107 switch, reg 0x31, bit 3
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)
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beam.tr_source = "spi" # TR source for chip, reg 0x31 bit 2. 'external' sets bit high, 'spi' sets bit low
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beam.tr_spi = (
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"rx" # TR SPI control, reg 0x31 bit 1. 'tx' sets bit high, 'rx' sets bit low
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)
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beam.tr_switch_enable = True # Switch driver for external switch, reg0x31, bit 4
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beam.external_tr_polarity = True # Sets polarity of TR switch compared to TR state of ADAR1000. True outputs 0V in Rx mode
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beam.rx_vga_enable = True # Enables Rx VGA, reg 0x2E, bit 0.
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beam.rx_vm_enable = True # Enables Rx VGA, reg 0x2E, bit 1.
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beam.rx_lna_enable = True # Enables Rx LNA, reg 0x2E, bit 2.
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beam.rx_lna_bias_current = 8 # Sets the LNA bias to the middle of its range
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beam.rx_vga_vm_bias_current = 22 # Sets the VGA and vector modulator bias.
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def ADAR_update_Rx(beam):
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beam.latch_rx_settings() # Loads Rx vectors from SPI. Writes 0x01 to reg 0x28.
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def ADAR_update_Tx(beam):
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beam.latch_tx_settings() # Loads Tx vectors from SPI. Writes 0x02 to reg 0x28.
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def ADAR_set_mode(beam, mode):
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if mode == "rx":
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# Configure the device for Rx mode
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beam.mode = (
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"rx" # Mode of operation, bit 5 of reg 0x31. "rx", "tx", or "disabled"
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)
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# print("When TR pin is low, ADAR1000 is in Rx mode.")
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# beam._ctrl.reg_write(0x031, 180) #Enables T/R switch control. When TR is low, ADAR1000 is Rx mode
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SELF_BIASED_LNAs = True
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if SELF_BIASED_LNAs:
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beam.lna_bias_out_enable = False # Allow the external LNAs to self-bias
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else:
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beam.lna_bias_on = -0.7 # Set the external LNA bias
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# Enable the Rx path for each channel
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for channel in beam.channels:
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channel.rx_enable = True
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def ADAR_set_Taper(array, gainList):
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for index, element in enumerate(array.elements.values()):
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element.rx_gain = int(gainList[index] * 127 / 100 * gcal[index])
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element.rx_attenuator = not bool(gainList[index])
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array.latch_rx_settings()
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def ADAR_set_Phase(
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array,
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PhDelta,
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phase_step_size,
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phaseList
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):
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for index, element in enumerate(array.elements.values()):
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element.rx_phase = (
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(np.rint(PhDelta * index / phase_step_size) * phase_step_size) + phaseList[index] + pcal[index]
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) % 360
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array.latch_rx_settings()
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def load_gain_cal(filename="gain_cal_val.pkl"):
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""" Load gain calibrated value, if not calibrated set all channel gain to maximum.
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parameters:
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filename: type=string
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Provide path of gain calibration file
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"""
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try:
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with open(filename, "rb") as file1:
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return pickle.load(file1) # Load gain cal values
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except FileNotFoundError:
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print("file not found, loading default (all gain at maximum)")
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return [1.0] * 8 # .append(0x7F)
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def load_phase_cal(filename="phase_cal_val.pkl"):
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""" Load phase calibrated value, if not calibrated set all channel phase correction to 0.
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parameters:
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filename: type=string
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Provide path of phase calibration file
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"""
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try:
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with open(filename, "rb") as file:
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return pickle.load(file) # Load gain cal values
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except FileNotFoundError:
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print("file not found, loading default (no phase shift)")
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return [0.0] * 8 # .append(0) # if it fails load default value i.e. 0
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gcal = load_gain_cal()
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pcal = load_phase_cal()
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if verbose == True:
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print("Gain cal: ", gcal)
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print("Phase cal: ", pcal)
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