Analog Devices / Mbed OS EVAL-AD4130

Example program for EVAL-AD4130

Dependencies:   tempsensors sdp_k1_sdram

scripts/ad4130_calibration.py@2:7b2b268ea49c, 21 months ago (annotated)

Committer:
Mahesh Phalke
Date:
Wed Jul 20 18:12:00 2022 +0530
Revision:
2:7b2b268ea49c
Initial firmware commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Mahesh Phalke 2:7b2b268ea49c 1 import serial
Mahesh Phalke 2:7b2b268ea49c 2 from time import sleep
Mahesh Phalke 2:7b2b268ea49c 3 from adi import ad4130
Mahesh Phalke 2:7b2b268ea49c 4 from ad4130_xattr import *
Mahesh Phalke 2:7b2b268ea49c 5
Mahesh Phalke 2:7b2b268ea49c 6 # Delays in second
Mahesh Phalke 2:7b2b268ea49c 7 short_time = 0.2
Mahesh Phalke 2:7b2b268ea49c 8
Mahesh Phalke 2:7b2b268ea49c 9 # Calibration type identifiers
Mahesh Phalke 2:7b2b268ea49c 10 internal_calibration = '1'
Mahesh Phalke 2:7b2b268ea49c 11 system_calibration = '2'
Mahesh Phalke 2:7b2b268ea49c 12
Mahesh Phalke 2:7b2b268ea49c 13 # Analog input mapping as configured in the firmware
Mahesh Phalke 2:7b2b268ea49c 14 ain_mapping = {
Mahesh Phalke 2:7b2b268ea49c 15 "User Default" : [ 'AIN0-AVSS', 'AIN1-AVSS', 'AIN2-AVSS', 'AIN3-AVSS',
Mahesh Phalke 2:7b2b268ea49c 16 'AIN4-AVSS', 'AIN5-AVSS', 'AIN6-AVSS', 'AIN7-AVSS',
Mahesh Phalke 2:7b2b268ea49c 17 'AIN8-AVSS', 'AIN9-AVSS', 'AIN10-AVSS', 'AIN11-AVSS',
Mahesh Phalke 2:7b2b268ea49c 18 'AIN12-AVSS', 'AIN13-AVSS', 'AIN14-AVSS', 'AIN15-AVSS'
Mahesh Phalke 2:7b2b268ea49c 19 ],
Mahesh Phalke 2:7b2b268ea49c 20 "Thermistor" : [ 'AIN4-AIN5' ],
Mahesh Phalke 2:7b2b268ea49c 21 "Thermocouple" : [ 'AIN2-AIN3', 'AIN4-AIN5' ],
Mahesh Phalke 2:7b2b268ea49c 22 "2-Wire RTD" : [ 'AIN2-AIN3' ],
Mahesh Phalke 2:7b2b268ea49c 23 "3-Wire RTD" : [ 'AIN2-AIN3' ],
Mahesh Phalke 2:7b2b268ea49c 24 "4-Wire RTD" : [ 'AIN2-AIN3' ],
Mahesh Phalke 2:7b2b268ea49c 25 "Loadcell" : [ 'AIN5-AIN6' ],
Mahesh Phalke 2:7b2b268ea49c 26 "ECG" : [ 'AIN11-AIN14' ],
Mahesh Phalke 2:7b2b268ea49c 27 "Noise Test" : [ 'AIN0-AIN1' ],
Mahesh Phalke 2:7b2b268ea49c 28 }
Mahesh Phalke 2:7b2b268ea49c 29
Mahesh Phalke 2:7b2b268ea49c 30 # IIO Channel name and respective channel index mapping
Mahesh Phalke 2:7b2b268ea49c 31 chn_mappping = {
Mahesh Phalke 2:7b2b268ea49c 32 "voltage0" : 0, "voltage1" : 1, "voltage2" : 2, "voltage3" : 3, "voltage4" : 4,
Mahesh Phalke 2:7b2b268ea49c 33 "voltage5" : 5, "voltage6" : 6, "voltage7" : 7, "voltage8" : 8, "voltage9" : 9,
Mahesh Phalke 2:7b2b268ea49c 34 "voltage10" : 10, "voltage11" : 11, "voltage12" : 12, "voltage13" : 13,
Mahesh Phalke 2:7b2b268ea49c 35 "voltage14" : 14, "voltage15" : 15,
Mahesh Phalke 2:7b2b268ea49c 36
Mahesh Phalke 2:7b2b268ea49c 37 "current0" : 0, "current1" : 1, "current2" : 2, "current3" : 3, "current4" : 4,
Mahesh Phalke 2:7b2b268ea49c 38 "current5" : 5, "current6" : 6, "current7" : 7, "current8" : 8, "current9" : 9,
Mahesh Phalke 2:7b2b268ea49c 39 "current10" : 10, "current11" : 11, "current12" : 12, "current13" : 13,
Mahesh Phalke 2:7b2b268ea49c 40 "current14" : 14, "current15" : 15,
Mahesh Phalke 2:7b2b268ea49c 41
Mahesh Phalke 2:7b2b268ea49c 42 "temp0" : 0, "temp1" : 1, "temp2" : 2, "temp3" : 3, "temp4" : 4,
Mahesh Phalke 2:7b2b268ea49c 43 "temp5" : 5, "temp6" : 6, "temp7" : 7, "temp8" : 8, "temp9" : 9,
Mahesh Phalke 2:7b2b268ea49c 44 "temp10" : 10, "temp11" : 11, "temp12" : 12, "temp13" : 13,
Mahesh Phalke 2:7b2b268ea49c 45 "temp14" : 14, "temp15" : 15,
Mahesh Phalke 2:7b2b268ea49c 46 }
Mahesh Phalke 2:7b2b268ea49c 47
Mahesh Phalke 2:7b2b268ea49c 48 def init_calibration():
Mahesh Phalke 2:7b2b268ea49c 49 global device
Mahesh Phalke 2:7b2b268ea49c 50 global demo_config
Mahesh Phalke 2:7b2b268ea49c 51
Mahesh Phalke 2:7b2b268ea49c 52 ######## User configuration ##########
Mahesh Phalke 2:7b2b268ea49c 53 # Configure the backend for PC to IIOD interface
Mahesh Phalke 2:7b2b268ea49c 54 uri = "serial:COM12,230400" # For UART, baud rate must be same as set in the FW. COM port is physical Or VCOM.
Mahesh Phalke 2:7b2b268ea49c 55 device_name = "ad4130-8" # Name of the device must be same as set in the FW.
Mahesh Phalke 2:7b2b268ea49c 56 ######################################
Mahesh Phalke 2:7b2b268ea49c 57
Mahesh Phalke 2:7b2b268ea49c 58 # Create an IIO device context
Mahesh Phalke 2:7b2b268ea49c 59 device = ad4130_xattr(uri, device_name)
Mahesh Phalke 2:7b2b268ea49c 60 device._ctx.set_timeout(100000)
Mahesh Phalke 2:7b2b268ea49c 61
Mahesh Phalke 2:7b2b268ea49c 62 # Get current user device config from the firmware
Mahesh Phalke 2:7b2b268ea49c 63 demo_config = device.demo_config
Mahesh Phalke 2:7b2b268ea49c 64 print("\r\nDemo Config: {}\r\n".format(demo_config))
Mahesh Phalke 2:7b2b268ea49c 65
Mahesh Phalke 2:7b2b268ea49c 66 def get_calibration_status(calibration_type, chn, chn_index):
Mahesh Phalke 2:7b2b268ea49c 67 global gain_before_calib, gain_after_calib
Mahesh Phalke 2:7b2b268ea49c 68 global offset_before_calib, offset_after_calib
Mahesh Phalke 2:7b2b268ea49c 69 global calibration_status
Mahesh Phalke 2:7b2b268ea49c 70
Mahesh Phalke 2:7b2b268ea49c 71 if (calibration_type == system_calibration):
Mahesh Phalke 2:7b2b268ea49c 72 calib_status = chn.system_calibration
Mahesh Phalke 2:7b2b268ea49c 73 else:
Mahesh Phalke 2:7b2b268ea49c 74 calib_status = chn.internal_calibration
Mahesh Phalke 2:7b2b268ea49c 75
Mahesh Phalke 2:7b2b268ea49c 76 gain_before_calib = calib_status[0:8]
Mahesh Phalke 2:7b2b268ea49c 77 gain_after_calib = calib_status[8:16]
Mahesh Phalke 2:7b2b268ea49c 78 offset_before_calib = calib_status[16:24]
Mahesh Phalke 2:7b2b268ea49c 79 offset_after_calib = calib_status[24:32]
Mahesh Phalke 2:7b2b268ea49c 80 calibration_status = calib_status[32:]
Mahesh Phalke 2:7b2b268ea49c 81
Mahesh Phalke 2:7b2b268ea49c 82 def perform_calibration():
Mahesh Phalke 2:7b2b268ea49c 83
Mahesh Phalke 2:7b2b268ea49c 84 if (demo_config == "Power Test"):
Mahesh Phalke 2:7b2b268ea49c 85 # Power test uses internal ADC channels, on which calibration can't be performed
Mahesh Phalke 2:7b2b268ea49c 86 print("Invalid demo mode config. Calibration can't be performed on internal ADC channels!!")
Mahesh Phalke 2:7b2b268ea49c 87 return
Mahesh Phalke 2:7b2b268ea49c 88
Mahesh Phalke 2:7b2b268ea49c 89 # Select calibration type
Mahesh Phalke 2:7b2b268ea49c 90 calibration_type = input("\r\nSelect Calibration Type:\r\n\
Mahesh Phalke 2:7b2b268ea49c 91 {}. Internal Calibration\r\n\
Mahesh Phalke 2:7b2b268ea49c 92 {}. System Calibration\r\n".format(internal_calibration, system_calibration))
Mahesh Phalke 2:7b2b268ea49c 93 if (calibration_type > system_calibration):
Mahesh Phalke 2:7b2b268ea49c 94 print("Invalid Input!!")
Mahesh Phalke 2:7b2b268ea49c 95 return
Mahesh Phalke 2:7b2b268ea49c 96
Mahesh Phalke 2:7b2b268ea49c 97 # Perform calibration for all channels
Mahesh Phalke 2:7b2b268ea49c 98 for chn in device.channel:
Mahesh Phalke 2:7b2b268ea49c 99 chn_index = chn_mappping[chn.name]
Mahesh Phalke 2:7b2b268ea49c 100 print("-------------------------------------------")
Mahesh Phalke 2:7b2b268ea49c 101 print("Calibrating channel {} ".format(chn_index))
Mahesh Phalke 2:7b2b268ea49c 102
Mahesh Phalke 2:7b2b268ea49c 103 if (calibration_type == system_calibration):
Mahesh Phalke 2:7b2b268ea49c 104 # Perform zero-scale (offset) system calibration
Mahesh Phalke 2:7b2b268ea49c 105 val = input("Apply zero-scale voltage between {} and press enter".format(ain_mapping[demo_config][chn_index]))
Mahesh Phalke 2:7b2b268ea49c 106 chn.system_calibration = "start_calibration"
Mahesh Phalke 2:7b2b268ea49c 107 sleep(short_time)
Mahesh Phalke 2:7b2b268ea49c 108 get_calibration_status(calibration_type, chn, chn_index)
Mahesh Phalke 2:7b2b268ea49c 109 print("Offset (before calibration): 0x{}".format(offset_before_calib))
Mahesh Phalke 2:7b2b268ea49c 110 print("Offset (after calibration): 0x{}".format(offset_after_calib))
Mahesh Phalke 2:7b2b268ea49c 111 if (calibration_status == "calibration_done"):
Mahesh Phalke 2:7b2b268ea49c 112 print("System offset calibration successfull..\r\n")
Mahesh Phalke 2:7b2b268ea49c 113 else:
Mahesh Phalke 2:7b2b268ea49c 114 print("System offset calibration failed!!\r\n")
Mahesh Phalke 2:7b2b268ea49c 115
Mahesh Phalke 2:7b2b268ea49c 116 # Perform full-scale (gain) system calibration
Mahesh Phalke 2:7b2b268ea49c 117 val = input("Apply full-scale voltage between {} and press enter".format(ain_mapping[demo_config][chn_index]))
Mahesh Phalke 2:7b2b268ea49c 118 chn.system_calibration = "start_calibration"
Mahesh Phalke 2:7b2b268ea49c 119 sleep(short_time)
Mahesh Phalke 2:7b2b268ea49c 120 get_calibration_status(calibration_type, chn, chn_index)
Mahesh Phalke 2:7b2b268ea49c 121 print("Gain (before calibration): 0x{}".format(gain_before_calib))
Mahesh Phalke 2:7b2b268ea49c 122 print("Gain (after calibration): 0x{}".format(gain_after_calib))
Mahesh Phalke 2:7b2b268ea49c 123 if (calibration_status == "calibration_done"):
Mahesh Phalke 2:7b2b268ea49c 124 print("System gain calibration successfull..\r\n")
Mahesh Phalke 2:7b2b268ea49c 125 else:
Mahesh Phalke 2:7b2b268ea49c 126 print("System gain calibration failed!!\r\n")
Mahesh Phalke 2:7b2b268ea49c 127 else:
Mahesh Phalke 2:7b2b268ea49c 128 # Perform full-scale (gain) internal calibration
Mahesh Phalke 2:7b2b268ea49c 129 chn.internal_calibration = "start_calibration"
Mahesh Phalke 2:7b2b268ea49c 130 sleep(short_time)
Mahesh Phalke 2:7b2b268ea49c 131 get_calibration_status(calibration_type, chn, chn_index)
Mahesh Phalke 2:7b2b268ea49c 132 print("Gain (before calibration): 0x{}".format(gain_before_calib))
Mahesh Phalke 2:7b2b268ea49c 133 print("Gain (after calibration): 0x{}".format(gain_after_calib))
Mahesh Phalke 2:7b2b268ea49c 134 if (calibration_status == "calibration_done"):
Mahesh Phalke 2:7b2b268ea49c 135 print("Internal gain calibration successfull..\r\n")
Mahesh Phalke 2:7b2b268ea49c 136 elif (calibration_status == "calibration_skipped"):
Mahesh Phalke 2:7b2b268ea49c 137 print("Internal gain calibration skipped due to PGA=1\r\n")
Mahesh Phalke 2:7b2b268ea49c 138 else:
Mahesh Phalke 2:7b2b268ea49c 139 print("Internal gain calibration failed..\r\n")
Mahesh Phalke 2:7b2b268ea49c 140
Mahesh Phalke 2:7b2b268ea49c 141 # Perform zero-scale (offset) internal calibration
Mahesh Phalke 2:7b2b268ea49c 142 chn.internal_calibration = "start_calibration"
Mahesh Phalke 2:7b2b268ea49c 143 sleep(short_time)
Mahesh Phalke 2:7b2b268ea49c 144 get_calibration_status(calibration_type, chn, chn_index)
Mahesh Phalke 2:7b2b268ea49c 145 print("Offset (before calibration): 0x{}".format(offset_before_calib))
Mahesh Phalke 2:7b2b268ea49c 146 print("Offset (after calibration): 0x{}".format(offset_after_calib))
Mahesh Phalke 2:7b2b268ea49c 147 if (calibration_status == "calibration_done"):
Mahesh Phalke 2:7b2b268ea49c 148 print("Internal offset calibration successfull..\r\n")
Mahesh Phalke 2:7b2b268ea49c 149 else:
Mahesh Phalke 2:7b2b268ea49c 150 print("Internal offset calibration failed!!\r\n")
Mahesh Phalke 2:7b2b268ea49c 151
Mahesh Phalke 2:7b2b268ea49c 152 def exit():
Mahesh Phalke 2:7b2b268ea49c 153 global device
Mahesh Phalke 2:7b2b268ea49c 154
Mahesh Phalke 2:7b2b268ea49c 155 # Delete the objects
Mahesh Phalke 2:7b2b268ea49c 156 del device
Mahesh Phalke 2:7b2b268ea49c 157
Mahesh Phalke 2:7b2b268ea49c 158 def main():
Mahesh Phalke 2:7b2b268ea49c 159 init_calibration()
Mahesh Phalke 2:7b2b268ea49c 160 perform_calibration()
Mahesh Phalke 2:7b2b268ea49c 161 exit()
Mahesh Phalke 2:7b2b268ea49c 162
Mahesh Phalke 2:7b2b268ea49c 163 if __name__ == "__main__":
Mahesh Phalke 2:7b2b268ea49c 164 main()