def source_0v8(args, text):
"""SOURCE CHA/B 0v8.
Connect channel A or B at 1 Mega load and enable ADC external reference
Set channel A or B to source reference voltage and get samples
Set again channel A or B to source reference voltage
and measure sourced voltage with external ADC
Optional is possible to generate plot images and display debug messages
Compare voltage difference between measurement and reference
to be in reference range then print PASS or FAIL message
"""
if args['restart_verification'] == 0:
ioxp_adp5589.gpo_set_ac(['GPIO_8__1', 'GPIO_3__1', 'EN_1V2__1'])
if args['restart_verification'] == 1:
ioxp_adp5589.gpo_set_ac(['GPIO_7__1', 'GPIO_3__1', 'EN_1V2__1'])
control_m1k.source(args['channel_index'], global_.Mode.SVMI,
args['srs_0v8_setpoint'], global_.Mode.HI_Z,
args['device'])
control_m1k.get_samples_find_average(args['device'])
control_m1k.source(args['channel_index'], global_.Mode.SVMI,
args['srs_0v8_setpoint'], global_.Mode.HI_Z,
args['device'])
adc_meas = adc_ad7091r5.voltage_input(2, args['calibration_factors_vin2'],
args['adc_samples'])
if args['brake_script']:
debug.add_break_point(text['orange'] +
'Measure sourced 0v8 with channel ' +
args['channel_name'] +
' ... Press ENTER to continue... ' +
text['default'])
if args['create_plots']:
debug.plot(str(args['device_id'] + '/Performance'),
'5__P__CH_' + args['channel_name'] + '_source_0V8',
global_.CHX_V_I[4], str(args['channel_index'] * 2))
if args['view_debug_messages']:
print '\n', 'ADC measurement', adc_meas, \
'tolerance', args['tolerance_voltage']
if abs(adc_meas[0] - args['srs_0v8_setpoint']) <= \
args['tolerance_voltage']:
debug_message = text['green'] + 'Source ' + \
'{0:+.4f}'.format(args['srs_0v8_setpoint']) + \
' [V] CH_' + args['channel_name'] + ' PASS' + text['default']
args['status'].append(True)
args['status_values'].append('{0:.4f}'.format(adc_meas[0]))
else:
debug_message = text['red'] + 'Source ' + \
'{0:+.4f}'.format(args['srs_0v8_setpoint']) + \
' [V] CH_' + args['channel_name'] + ' FAIL' + text['default']
args['status'].append(False)
args['status_values'].append('{0:.4f}'.format(adc_meas[0]))
if not args['enable_debug_mode']:
print debug_message
exit(1)
if args['view_short_debug_messages']:
print debug_message
return args['status']
def check_adc(channel, ex_1v2_ref, adc_offset, adc_scale, adc_gain):
"""Check ADC calibration for selected channel."""
done = False
while not done:
adc_params = [ex_1v2_ref, adc_offset, adc_scale, adc_gain]
adc = adc_ad7091r5.voltage_input(channel, adc_params, 1000)
key = wait_key('\t ADC: {:<20} \r'.format(adc), 1)
if key == '':
done = True
break
return adc
def predetermine_resistance(polarity):
"""Calculate resistance besed on ADC measurements after calibration."""
ex_1v2_ref = eeprom_m24c02.read_write(0x08, '', 8, 'float')
adc_offset_vin3 = int(eeprom_m24c02.read_write(0x50, '', 2, 'float'))
adc_scale_vin3 = eeprom_m24c02.read_write(0x53, '', 6, 'float')
adc_gain_vin3 = eeprom_m24c02.read_write(0x5A, '', 6, 'float')
adc_params_3 = [ex_1v2_ref, adc_offset_vin3, adc_scale_vin3, adc_gain_vin3]
adc_offset_vin2 = int(eeprom_m24c02.read_write(0x40, '', 2, 'float'))
adc_scale_vin2 = eeprom_m24c02.read_write(0x43, '', 6, 'float')
adc_gain_vin2 = eeprom_m24c02.read_write(0x4A, '', 6, 'float')
adc_params_2 = [ex_1v2_ref, adc_offset_vin2, adc_scale_vin2, adc_gain_vin2]
adc_offset_poz = int(eeprom_m24c02.read_write(0x70, '', 3, 'hex'), 16)
adc_gain_poz = int(eeprom_m24c02.read_write(0x75, '', 3, 'hex'), 16)
i_gain_poz = eeprom_m24c02.read_write(0x7A, '', 6, 'float')
adc_offset_neg = int(eeprom_m24c02.read_write(0x80, '', 3, 'hex'), 16)
adc_gain_neg = int(eeprom_m24c02.read_write(0x85, '', 3, 'hex'), 16)
i_gain_neg = eeprom_m24c02.read_write(0x89, '', 7, 'float')
if polarity == 'poz':
ref_2v5_srs = adc_ad7091r5.voltage_input(3, adc_params_3, 1000)[0]
chx_voltage_srs = adc_ad7091r5.voltage_input(2, adc_params_2, 1000)[0]
current_chx_poz = adc_ad7091r5.current_value(adc_offset_poz,
adc_gain_poz, i_gain_poz,
1000)[0]
voltage = chx_voltage_srs + 0.022 - ref_2v5_srs
resistance_srs = voltage / current_chx_poz
print(resistance_srs)
if polarity == 'neg':
ref_2v5_snc = adc_ad7091r5.voltage_input(3, adc_params_3, 1000)[0]
chx_voltage_snc = adc_ad7091r5.voltage_input(2, adc_params_2, 1000)[0]
current_chx_neg = adc_ad7091r5.current_value(adc_offset_neg,
adc_gain_neg, i_gain_neg,
1000)[0]
voltage = chx_voltage_snc - 0.027 - ref_2v5_snc
resistance_snc = voltage / current_chx_neg
print(resistance_snc)
def voltage_measurement_2v5(args, text):
"""MEASURE CHA/B EXTERNAL REFERENCE 2V5.
Disconnect channels from GND and 2V5 using internal M1K switches
Connect channel A or B at 2V5 external reference
Set both channels to high impedance mode and get samples
Optional is possible to generate plot images and display debug messages
Compare voltage difference between measurement and reference
to be in reference range then print PASS or FAIL message
"""
control_m1k.set_switches_chs_2v5_gnd('open', 'open', 'open', 'open',
args['device'])
if args['restart_verification'] == 0:
ioxp_adp5589.gpo_set_ac(['GPIO_8__1', 'GPIO_0__1', 'EN_1V2__1'])
if args['restart_verification'] == 1:
ioxp_adp5589.gpo_set_ac(['GPIO_7__1', 'GPIO_0__1', 'EN_1V2__1'])
control_m1k.channels_in_hi_z()
control_m1k.get_samples_find_average(args['device'])
adc_meas = \
adc_ad7091r5.voltage_input(
2, args['calibration_factors_vin2'],
args['adc_samples'])[0]
if args['create_plots']:
debug.plot(str(args['device_id'] + '/Performance'),
'1__P__CH_' + args['channel_name'] + '_measure_2V5',
global_.CHX_V_I[4], str(args['channel_index'] * 2))
if args['view_debug_messages']:
print '\n', global_.CHX_V_I[args['channel_index'] * 2], '-', \
adc_meas, '=> abs():', \
abs(global_.CHX_V_I[args['channel_index'] * 2] - adc_meas), \
'should be <=', adc_meas * args['tolerance_voltage']
if abs(global_.CHX_V_I[args['channel_index'] * 2] - adc_meas) <= \
adc_meas * args['tolerance_voltage']:
debug_message = text['green'] + 'Measure ' + \
'{0:+.4f}'.format(adc_meas) + ' [V] CH_' + \
args['channel_name'] + ' PASS' + text['default']
args['status'].append(True)
args['status_values'].append('{0:.4f}'.format(adc_meas))
else:
debug_message = text['red'] + 'Measure ' + \
'{0:+.4f}'.format(adc_meas) + ' [V] CH_' + \
args['channel_name'] + ' FAIL' + text['default']
args['status'].append(False)
args['status_values'].append('{0:.4f}'.format(adc_meas))
if not args['enable_debug_mode']:
print debug_message
exit(1)
if args['view_short_debug_messages']:
print debug_message
return args['status']
def voltage_measurement_3v75(args, text):
"""MEASURE CHA/B EXTERNAL 3V75.
Set DAC to generate reference voltage
Set both channels to high impedance mode and get samples
Optional is possible to generate plot images and display debug messages
Compare voltage difference between measurement and reference
to be in reference range then print PASS or FAIL message
"""
dac_ad5647r.set_output(args['dac_srs_3v75_cmd'])
control_m1k.channels_in_hi_z()
control_m1k.get_samples_find_average(args['device'])
adc_meas = \
adc_ad7091r5.voltage_input(
2, args['calibration_factors_vin2'],
args['adc_samples'])[0]
if args['create_plots']:
debug.plot(str(args['device_id'] + '/Performance'),
'4__P__CH_' + args['channel_name'] + '_measure_3V75',
global_.CHX_V_I[4], str(args['channel_index'] * 2))
if args['view_debug_messages']:
print '\n', global_.CHX_V_I[args['channel_index'] * 2], '-', \
adc_meas, '=> abs():', \
abs(global_.CHX_V_I[args['channel_index'] * 2] - adc_meas), \
'should be <=', adc_meas * args['tolerance_voltage']
if abs(global_.CHX_V_I[args['channel_index'] * 2] - adc_meas) <= \
adc_meas * args['tolerance_voltage']:
debug_message = text['green'] + 'Measure ' + \
'{0:+.4f}'.format(adc_meas) + ' [V] CH_' + \
args['channel_name'] + ' PASS' + text['default']
args['status'].append(True)
args['status_values'].append('{0:.4f}'.format(adc_meas))
else:
debug_message = text['red'] + 'Measure ' + \
'{0:+.4f}'.format(adc_meas) + ' [V] CH_' + \
args['channel_name'] + ' FAIL' + text['default']
args['status'].append(False)
args['status_values'].append('{0:.4f}'.format(adc_meas))
if not args['enable_debug_mode']:
print debug_message
exit(1)
if args['view_short_debug_messages']:
print debug_message
return args['status']
def supply_output_2v5(min_lim, max_lim, calibration_factors_vin3, adc_samples,
args):
"""Check M1K 2.5V reference.
Compare M1K 2V5 with a min and a max value and return PASS or FAIL message
"""
m1k_2v5_rail = \
adc_ad7091r5.voltage_input(3, calibration_factors_vin3, adc_samples)[0]
if m1k_2v5_rail >= min_lim and m1k_2v5_rail < max_lim:
result = TEXT['green'] + '2V5 CHECK PASS' + TEXT['default']
args['status'].append(True)
args['status_values'].append('{0:.4f}'.format(m1k_2v5_rail))
else:
result = TEXT['red'] + '2V5 CHECK FAIL' + TEXT['default']
args['status'].append(False)
args['status_values'].append('{0:.4f}'.format(m1k_2v5_rail))
if not args['enable_debug_mode']:
print result
exit(1)
if args['view_short_debug_messages']:
print result
return args['status']