def test_WriteTenPointsThenWriteSinglePointInBankB_ReturnExpectedReadBack(self):
AO0 = AnalogOutput({'bank': Bank.B, 'channel': AOChannel.AO0})
AI0 = AnalogInput({'bank': Bank.B, 'channel': AIChannel.AI0})
def __multipleWriteAndRead():
sample_rate = 1000
input_value = [7,7,7,7,7,7,7,5,5,10]
expected_value = '7,7,7,7,7,7,7,5,5,10'
irq_thread = threading.Thread(target=self.__reading_thread, args=(AI0, len(input_value), sample_rate, expected_value))
self.__start_thread(irq_thread)
AO0.write(input_value, sample_rate)
self.__close_thread(irq_thread)
def __singleWriteAndRead():
input_value = 3.2
AO0.write(input_value)
value = AI0.read()[0]
self.assertEqual(value, pytest.approx(input_value, 0.1))
__multipleWriteAndRead()
__singleWriteAndRead()
AO0.close()
AI0.close()
def setUp(self):
self.AI_single_channel = AnalogInput({
'bank': bankA,
'channel': AIChannel.AI2,
'range': AIRange.PLUS_OR_MINUS_5V,
'mode': AIMode.SINGLE_ENDED
})
def setUp(self):
self.AO_single_channel = AnalogOutput({
'bank': bank,
'channel': AOChannel.AO0
})
self.AI_single_channel = AnalogInput({
'bank': bank,
'channel': AIChannel.AI0
})
def readWaveformFromAI(p_sampleRate,
p_sampleSize,
p_bank=Bank.A,
p_channel=AIChannel.AI0,
p_channelRef=None):
ai_range = AIRange.PLUS_OR_MINUS_1V
ai_mode = AIMode.SINGLE_ENDED
isNewChannel = p_channelRef is None
value_array = []
if isNewChannel:
p_channelRef = AnalogInput({
'bank': p_bank,
'channel': p_channel,
'range': ai_range,
'mode': ai_mode
})
# configure the sample rate and start the acquisition
p_channelRef.start_continuous_mode(p_sampleRate)
printString('开始10秒录音...')
# read the value
timeout = -1
value_array = p_channelRef.read(p_sampleSize, timeout)
printString('结束录音')
# stop signal acquisition
p_channelRef.stop_continuous_mode()
if isNewChannel:
p_channelRef.close()
return value_array[0]
def open_first_ai(self):
self.first_ai = AnalogInput(
{
'bank': bankA,
'channel': AIChannel.AI2,
'range': AIRange.PLUS_OR_MINUS_10V
}, {
'bank': bankA,
'channel': AIChannel.AI2,
'mode': AIMode.DIFFERENTIAL
})
def setUp(self):
self.AI_multiple_channels = AnalogInput(
{
'bank': bankA,
'channel': AIChannel.AI2,
'range': AIRange.PLUS_OR_MINUS_10V
}, {
'bank': bankA,
'channel': AIChannel.AI2,
'mode': AIMode.DIFFERENTIAL
})
class Test_AnalogInputAndOutput_WriteTwoChannels(unittest.TestCase):
def setUp(self):
self.AO_multiple_channels = AnalogOutput({'bank': bank, 'channel': AOChannel.AO0},
{'bank': bank, 'channel': AOChannel.AO1})
self.AI_multiple_channels = AnalogInput({'bank': bank, 'channel': AIChannel.AI0},
{'bank': bank, 'channel': AIChannel.AI3})
def tearDown(self):
self.AO_multiple_channels.close()
self.AI_multiple_channels.close()
def __start_thread(self, irq_thread):
irq_thread.start()
self.run = True
def __close_thread(self, irq_thread):
self.run = False
irq_thread.join()
def __reading_thread(self, number_of_samples, sample_rate, expected_value):
value_array = None
while self.run:
value_array = self.AI_multiple_channels.read(number_of_samples, sample_rate)
value_array_in_bank_A = value_array[0]
AI1_array = value_array_in_bank_A[0]
AI3_array = value_array_in_bank_A[1]
AI1_values = [ round(value) for value in AI1_array ]
AI3_values = [ round(value) for value in AI3_array ]
print('AO0 %s should almost equal to %s' % (AI1_values, expected_value))
print('AO3 %s should almost equal to %s' % (AI3_values, expected_value))
def test_WriteSinglePoint_ReturnExpectedReadBack(self):
input_value = 3.5
self.AO_multiple_channels.write(input_value)
value_array = self.AI_multiple_channels.read()
for value in value_array:
self.assertEqual(value, pytest.approx(input_value, 0.1))
def test_WriteSixteenPointsWithOneThousandSampleRate_ReturnExpectedReadBack(self):
sample_rate = 1000
input_value = [9,9,9,9,9,9,9,9,9,9,5,5,5,2,2,2]
expected_value = '9,9,9,9,9,9,9,9,9,9,5,5,5,2,2,2'
irq_thread = threading.Thread(target=self.__reading_thread, args=(len(input_value), sample_rate, expected_value))
self.__start_thread(irq_thread)
self.AO_multiple_channels.write(input_value, sample_rate)
self.__close_thread(irq_thread)
def test_OpenWithInvalidRange_ShowAssertion(self):
with self.assertRaises(AssertionError):
AnalogInput({
'bank': bankA,
'channel': AIChannel.AI2,
'range': '+/-20V'
})
def test_OpenWithInvalidBank_ShowAssertion(self):
with self.assertRaises(AssertionError):
AnalogInput({
'bank': 'C',
'channel': AIChannel.AI0,
'mode': AIMode.SINGLE_ENDED
})
def test_OpenWithInvalidChannelInSingleEndedMode_ShowAssertion(self):
with self.assertRaises(AssertionError):
AnalogInput({
'bank': bankA,
'channel': 8,
'mode': AIMode.SINGLE_ENDED
})
def readWaveformFromAI(p_sampleRate, p_sampleSize):
ai_bank = Bank.A
ai_channel = AIChannel.AI0
ai_range = AIRange.PLUS_OR_MINUS_1V
ai_mode = AIMode.SINGLE_ENDED
value_array = []
with AnalogInput({
'bank': ai_bank,
'channel': ai_channel,
'range': ai_range,
'mode': ai_mode
}) as AI_single_channel:
# configure the sample rate and start the acquisition
AI_single_channel.start_continuous_mode(p_sampleRate)
print('start recording...')
# read the value
timeout = -1
value_array = AI_single_channel.read(p_sampleSize, timeout)
print('stop recording')
# stop signal acquisition
AI_single_channel.stop_continuous_mode()
return value_array[0]
def test_OpenWithInvalidChannelInDifferentialMode_ShowAssertion(self):
with self.assertRaises(AssertionError):
AnalogInput({
'bank': bankA,
'channel': AIChannel.AI4,
'mode': AIMode.DIFFERENTIAL
})
class Test_AnalogInput_ReadSingleChannelFromBankB(unittest.TestCase):
def setUp(self):
self.AI_single_channel = AnalogInput({
'bank': bankB,
'channel': AIChannel.AI7,
'range': AIRange.PLUS_OR_MINUS_5V,
'mode': AIMode.SINGLE_ENDED
})
def tearDown(self):
self.AI_single_channel.close()
def checkMultiplePointsReadBackValues(self, value_array,
number_of_samples):
value_array_for_first_channel = value_array[0][0]
self.assertEqual(len(value_array_for_first_channel), number_of_samples)
for value in value_array_for_first_channel:
self.assertEqual(float(value), pytest.approx(3.3, 0.1))
def test_ContinuousMode_Read2222PointsWith500SampleRateAnd2000Timeout_ReturnExpectedReadBack(
self):
number_of_samples = 2222
sample_rate = 1200
timeout = -1
self.AI_single_channel.start_continuous_mode(sample_rate)
value_array = self.AI_single_channel.read(number_of_samples, timeout)
self.AI_single_channel.stop_continuous_mode()
self.checkMultiplePointsReadBackValues(value_array, number_of_samples)
def test_WriteSinglePoint_ReturnDifferentValueFromEachChannel(self):
AO_multiple_channels = AnalogOutput({'bank': bank, 'channel': AOChannel.AO0},
{'bank': bank, 'channel': AOChannel.AO1})
AI_multiple_channels = AnalogInput({'bank': bank, 'channel': AIChannel.AI0},
{'bank': bank, 'channel': AIChannel.AI3})
input_value_for_single_channels = 2.5
input_value_for_multiple_channels = 3.3
AO_multiple_channels.write(input_value_for_multiple_channels)
self.AO_single_channel.write(input_value_for_single_channels)
value_array = AI_multiple_channels.read()
for index, value in enumerate(value_array):
if index == 0:
self.assertEqual(value, pytest.approx(input_value_for_single_channels, 0.1))
else:
self.assertEqual(value, pytest.approx(input_value_for_multiple_channels, 0.1))
AO_multiple_channels.close()
AI_multiple_channels.close()
class Test_AnalogOutput_WriteSingleChannel(unittest.TestCase):
def setUp(self):
self.AO_single_channel = AnalogOutput({
'bank': bank,
'channel': AOChannel.AO0
})
self.AI_single_channel = AnalogInput({
'bank': bank,
'channel': AIChannel.AI0
})
def tearDown(self):
self.AO_single_channel.close()
self.AI_single_channel.close()
def test_OpeWriteMultiplePointsCloseRepeatedly_DoesnotShowAnyError(self):
sample_rate = 1000
input_value = [1.1, 2.2]
AO0_in_bank_A = AnalogOutput({
'bank': Bank.A,
'channel': AOChannel.AO0
})
AO0_in_bank_B = AnalogOutput({
'bank': Bank.B,
'channel': AOChannel.AO0
})
AO0_in_bank_A.write(input_value, sample_rate)
AO0_in_bank_B.write(input_value, sample_rate)
AO0_in_bank_B.close()
AO0_in_bank_A.write(input_value, sample_rate)
AO0_in_bank_A.close()
def test_WriteLargeNumberOfValuesWithTenThousandSampleRate_DoesnotShowAnyError(
self):
sample_rate = 10000
input_value = [3.3 for i in range(55555)]
self.AO_single_channel.write(input_value, sample_rate)
class Test_AnalogInput_CalculateSampleRateToTicks(unittest.TestCase):
@classmethod
def setUpClass(self):
self.AI = AnalogInput({'bank': bankA, 'channel': AIChannel.AI2})
@classmethod
def tearDownClass(self):
self.AI.close()
def test_GivenMin_ReturnExpectedCountAndSampleRate(self):
count, actual_sample_rate = self.AI.calculate_sample_rate_to_ticks(
limits['sampleRate']['min'])
self.assertEqual(count, 40000)
self.assertEqual(actual_sample_rate, 1000)
def test_GivenAThousand_ReturnExpectedCountAndSampleRate(self):
count, actual_sample_rate = self.AI.calculate_sample_rate_to_ticks(
1000)
self.assertEqual(count, 40000)
self.assertEqual(actual_sample_rate, 1000)
def test_GivenFiveThousand_ReturnExpectedCountAndSampleRate(self):
count, actual_sample_rate = self.AI.calculate_sample_rate_to_ticks(
5000)
self.assertEqual(count, 8000)
self.assertEqual(actual_sample_rate, 5000)
def test_GivenTenThousand_ReturnExpectedCountAndSampleRate(self):
count, actual_sample_rate = self.AI.calculate_sample_rate_to_ticks(
10000)
self.assertEqual(count, 4000)
self.assertEqual(actual_sample_rate, 10000)
def test_GivenFiftyThousand_ReturnExpectedCountAndSampleRate(self):
count, actual_sample_rate = self.AI.calculate_sample_rate_to_ticks(
50000)
self.assertEqual(count, 1333)
self.assertEqual(actual_sample_rate, pytest.approx(30007.5, 0.01))
def test_GivenMax_ReturnExpectedCountAndSampleRate(self):
count, actual_sample_rate = self.AI.calculate_sample_rate_to_ticks(
limits['sampleRate']['max'])
self.assertEqual(count, 1333)
self.assertEqual(actual_sample_rate, pytest.approx(30007.5, 0.01))
def test_GivenBankAAI0AI1AndBankBAI0AI1_Write_ReturnExpectedReadBack(self):
def __read(number_of_times_to_read, read_object, number_of_samples_to_read, timeout, expected_value):
title = {'A': 'Bank A AI0 - AO0 and AI1 - AO3', 'B': 'Bank B AI0 - AO1 and AI0 - AO3'}
result = {'A': [[],[]], 'B': [[],[]]}
for i in range(0, number_of_times_to_read):
value_array = read_object.read(number_of_samples_to_read, timeout)
# print(value_array)
bank_A_values = value_array[0]
bank_B_values = value_array[1]
result['A'][0].append(bank_A_values[0])
result['A'][1].append(bank_A_values[1])
result['B'][0].append(bank_B_values[0])
result['B'][1].append(bank_B_values[1])
def __print(bank):
print(title[bank])
for index, channel in enumerate(result[bank]):
for values_per_channel in channel:
values = [ round(value) for value in values_per_channel ]
print('continuous: %s should almost equal to %s and continuous from the last read' % (values, expected_value[bank][index]))
__print(Bank.A.value)
__print(Bank.B.value)
AO = AnalogOutput({'bank': Bank.B, 'channel': AOChannel.AO0},
{'bank': Bank.B, 'channel': AOChannel.AO1},
{'bank': bank, 'channel': AOChannel.AO0},
{'bank': bank, 'channel': AOChannel.AO1})
AI = AnalogInput({'bank': Bank.B, 'channel': AIChannel.AI0},
{'bank': Bank.B, 'channel': AIChannel.AI3},
{'bank': bank, 'channel': AIChannel.AI0},
{'bank': bank, 'channel': AIChannel.AI3})
timeout = -1
sample_rate = 1000
input_value = [[1,2,3,4,5,6,7,8,9,10], [10,9,8,7,6,5,4,3,2,1], [2,3,4,5,6,2,3,4,5,6], [7,6,5,4,3,7,6,5,4,3]]
number_of_samples_to_read = 5
expected_value = {
'A': [self.__convert_list_to_string(input_value[2]), self.__convert_list_to_string(input_value[3])],
'B': [self.__convert_list_to_string(input_value[0]), self.__convert_list_to_string(input_value[1])]
}
irq_thread = threading.Thread(target=self.__writing_thread, args=(AO, input_value, timeout))
AO.start_continuous_mode(input_value, sample_rate, timeout)
self.__start_thread(irq_thread)
AI.start_continuous_mode(sample_rate)
__read(2, AI, number_of_samples_to_read, timeout, expected_value)
self.__close_thread(irq_thread)
AO.close()
AI.close()
def test_OpenTwoChannelsInBankAAndThreeChannelsInBankB_HaveExpectedCnfgvalue(
self):
expectedResults = [{
'bank': 'A',
'channel': AIChannel.AI0,
'cnfgval': 8
}, {
'bank': 'A',
'channel': AIChannel.AI5,
'cnfgval': 13
}, {
'bank': 'B',
'channel': AIChannel.AI3,
'cnfgval': 11
}, {
'bank': 'B',
'channel': AIChannel.AI2 + 8,
'cnfgval': 2
}, {
'bank': 'B',
'channel': AIChannel.AI4,
'cnfgval': 12
}]
AI = AnalogInput({
'bank': bankA,
'channel': AIChannel.AI0
}, {
'bank': bankB,
'channel': AIChannel.AI3
}, {
'bank': bankB,
'channel': AIChannel.AI2,
'mode': AIMode.DIFFERENTIAL
}, {
'bank': bankA,
'channel': AIChannel.AI5
}, {
'bank': bankB,
'channel': AIChannel.AI4
})
AI.read()
for index, channel_settings in enumerate(AI.channel_list):
self.assertEqual(channel_settings['bank'],
expectedResults[index]['bank'])
self.assertEqual(channel_settings['channel'],
expectedResults[index]['channel'])
self.assertEqual(channel_settings['cnfgval'],
expectedResults[index]['cnfgval'])
AI.close()
def test_GivenBankAAI0AI1AndBankBAI0_WriteWithDifferentValuesLength_ReturnExpectedReadBack(self):
def __read(number_of_times_to_read, read_object, number_of_samples_to_read, timeout, expected_value):
# result = [A: [AO0, AO1], B: [AO0]]
result = [[[],[]], [[],[]]]
for i in range(0, number_of_times_to_read):
value_array = read_object.read(number_of_samples_to_read, timeout)
bank_A_values = value_array[0]
bank_B_values = value_array[1]
result[0][0].append(bank_A_values[0])
result[0][1].append(bank_A_values[1])
result[1][0].append(bank_B_values[0])
def __print(channels, bank):
for channel in channels:
for index, values_per_channel in enumerate(channel):
values = [ round(value) for value in values_per_channel ]
if bank == Bank.A.value:
print('continuous: %s should almost equal to %s and continuous from the last read' % (values, expected_value[index]))
else:
print('continuous: %s should almost equal to %s and continuous from the last read' % (values, expected_value[2]))
print('Bank A AI0 - AO0 and AI1 - AO3')
__print(result[0], Bank.A.value)
print('Bank B AI0 - AO0')
__print(result[1], Bank.B.value)
AO = AnalogOutput({'bank': Bank.B, 'channel': AOChannel.AO0},
{'bank': bank, 'channel': AOChannel.AO0},
{'bank': bank, 'channel': AOChannel.AO1})
AI = AnalogInput({'bank': Bank.B, 'channel': AIChannel.AI0},
{'bank': bank, 'channel': AIChannel.AI0},
{'bank': bank, 'channel': AIChannel.AI3})
timeout = -1
sample_rate = 1000
input_value = [[0,1,2,3,4,5,0,1,2,3,4,5], [7,8,9,10,7,8,9,10,7,8,9,10], [1,2,3,4,5,1,2,3,4,5]]
number_of_samples_to_read = 4
expected_value = [self.__convert_list_to_string(input_value[1]), self.__convert_list_to_string(input_value[2]), self.__convert_list_to_string(input_value[0])]
irq_thread = threading.Thread(target=self.__writing_thread, args=(AO, input_value, timeout))
AO.start_continuous_mode(input_value, sample_rate, timeout)
self.__start_thread(irq_thread)
AI.start_continuous_mode(sample_rate)
__read(2, AI, number_of_samples_to_read, timeout, expected_value)
self.__close_thread(irq_thread)
AO.close()
AI.close()
def openAndCheck(bank):
AI = AnalogInput({
'bank': bank,
'channel': AIChannel.AI0
}, {
'bank': bank,
'channel': AIChannel.AI1
}, {
'bank': bank,
'channel': AIChannel.AI2
}, {
'bank': bank,
'channel': AIChannel.AI3
}, {
'bank': bank,
'channel': AIChannel.AI4
}, {
'bank': bank,
'channel': AIChannel.AI5
}, {
'bank': bank,
'channel': AIChannel.AI6
}, {
'bank': bank,
'channel': AIChannel.AI7
}, {
'bank': bank,
'channel': AIChannel.AI0,
'mode': AIMode.DIFFERENTIAL
}, {
'bank': bank,
'channel': AIChannel.AI1,
'mode': AIMode.DIFFERENTIAL
}, {
'bank': bank,
'channel': AIChannel.AI2,
'mode': AIMode.DIFFERENTIAL
}, {
'bank': bank,
'channel': AIChannel.AI3,
'mode': AIMode.DIFFERENTIAL
})
AI.read()
for index, channel_settings in enumerate(AI.channel_list):
self.assertEqual(channel_settings['channel'],
expectedResults['channel'][index])
self.assertEqual(channel_settings['cnfgval'],
expectedResults['cnfgval'][index])
AI.close()
def test_GivenBankBAI0AndBankAAI1_Write_ReturnExpectedReadBack(self):
def __read(number_of_times_to_read, read_object, number_of_samples_to_read, timeout, expected_value_for_bank_A, expected_value_for_bank_B):
result = [[], []]
for i in range(0, number_of_times_to_read):
value_array = read_object.read(number_of_samples_to_read, timeout)
result[0].append(value_array[0])
result[1].append(value_array[1])
def __print(channels, expected_value):
for channel in channels:
for values_per_channel in channel:
values = [ round(value) for value in values_per_channel ]
print('continuous: %s should almost equal to %s and continuous from the last read' % (values, expected_value))
print('Bank A AI3 - AO1')
__print(result[0], expected_value_for_bank_A)
print('Bank B AI0 - AO0')
__print(result[1], expected_value_for_bank_B)
AO = AnalogOutput({'bank': Bank.B, 'channel': AOChannel.AO0},
{'bank': bank, 'channel': AOChannel.AO1})
AI = AnalogInput({'bank': Bank.B, 'channel': AIChannel.AI0},
{'bank': bank, 'channel': AIChannel.AI3})
timeout = -1
sample_rate = 1000
input_value = [[1,2,3,4,5,6,7,8,9,10], [10,9,8,7,6,5,4,3,2,1]]
number_of_samples_to_read = 5
expected_value_for_bank_B = self.__convert_list_to_string(input_value[0])
expected_value_for_bank_A = self.__convert_list_to_string(input_value[1])
irq_thread = threading.Thread(target=self.__writing_thread, args=(AO, input_value, timeout))
AO.start_continuous_mode(input_value, sample_rate, timeout)
self.__start_thread(irq_thread)
AI.start_continuous_mode(sample_rate)
__read(2, AI, number_of_samples_to_read, timeout, expected_value_for_bank_A, expected_value_for_bank_B)
self.__close_thread(irq_thread)
AO.close()
AI.close()
def __write_and_read(input_value):
AO_single_channel = AnalogOutput({'bank': Bank.B, 'channel': AOChannel.AO0})
AI_single_channel = AnalogInput({'bank': Bank.B, 'channel': AIChannel.AI0})
timeout = -1
sample_rate = 1000
number_of_samples_to_read = 10
expected_value = self.__convert_list_to_string(input_value)
irq_thread = threading.Thread(target=self.__writing_thread, args=(AO_single_channel, input_value, timeout))
AO_single_channel.start_continuous_mode(input_value, sample_rate, timeout)
self.__start_thread(irq_thread)
AI_single_channel.start_continuous_mode(sample_rate)
self.__read(2, AI_single_channel, number_of_samples_to_read, timeout, expected_value)
self.__close_thread(irq_thread)
AO_single_channel.close()
AI_single_channel.close()
def test_Given7PointsWith1000SampleRateOnBankA_WriteThenCloseWithoutStop_ReturnExpectedReadBack(self):
AO_single_channel = AnalogOutput({'bank': bank, 'channel': AOChannel.AO0})
AI_single_channel = AnalogInput({'bank': bank, 'channel': AIChannel.AI0})
timeout = -1
sample_rate = 2000
input_value = [[9,8,7,6,5,4,3,2,1,0,9,8,7,6,5,4,3,2,1,0]]
number_of_samples_to_read = 7
expected_value = self.__convert_list_to_string(input_value)
irq_thread = threading.Thread(target=self.__writing_thread, args=(AO_single_channel, input_value, timeout))
AO_single_channel.start_continuous_mode(input_value, sample_rate, timeout)
self.__start_thread(irq_thread)
AI_single_channel.start_continuous_mode(sample_rate)
self.__read(3, AI_single_channel, number_of_samples_to_read, timeout, expected_value)
self.__close_thread(irq_thread)
AO_single_channel.close()
AI_single_channel.close()
class Test_AnalogInput_ReadAssertion(unittest.TestCase):
def setUp(self):
self.AI_single_channel = AnalogInput({
'bank': bankA,
'channel': AIChannel.AI2,
'range': AIRange.PLUS_OR_MINUS_5V,
'mode': AIMode.SINGLE_ENDED
})
self.AI_multiple_channels = AnalogInput(
{
'bank': bankA,
'channel': AIChannel.AI2,
'range': AIRange.PLUS_OR_MINUS_10V
}, {
'bank': bankA,
'channel': AIChannel.AI2,
'mode': AIMode.DIFFERENTIAL
})
@classmethod
def setUpClass(self):
self.approx_number_of_samples = 10
self.approx_samples_rate = 1000
def tearDown(self):
self.AI_single_channel.close()
self.AI_multiple_channels.close()
def test_PassOneArgumentToReadOneChannel_ShowAssertion(self):
with self.assertRaises(TypeError):
self.AI_single_channel.read(10)
def test_PassThreeArgumentsToReadOneChannel_ShowAssertion(self):
with self.assertRaises(TypeError):
self.AI_single_channel.read(10, 10, 10)
def test_PassNumberOfSamplesThatGreaterThanMaxToReadOneChannel_ShowAssertion(
self):
with self.assertRaises(AssertionError):
self.AI_single_channel.read(limits['numberOfSamples']['max'] + 1,
self.approx_samples_rate)
def test_PassNumberOfSamplesThatLessThanMinToReadOneChannel_ShowAssertion(
self):
with self.assertRaises(AssertionError):
self.AI_single_channel.read(limits['numberOfSamples']['min'] - 1,
self.approx_samples_rate)
def test_PassMaxSampleRateToReadTwoChannels_ShowAssertion(self):
with self.assertRaises(AssertionError):
self.AI_multiple_channels.read(self.approx_number_of_samples,
limits['sampleRate']['max'])
def test_PassSampleRateThatGreaterThanMaxToReadOneChannel_ShowAssertion(
self):
with self.assertRaises(AssertionError):
self.AI_single_channel.read(self.approx_number_of_samples,
limits['sampleRate']['max'] + 1)
def test_PassSampleRateThatLessThanMinToReadOneChannel_ShowAssertion(self):
with self.assertRaises(AssertionError):
self.AI_single_channel.read(self.approx_number_of_samples,
limits['sampleRate']['min'] - 1)
# specify the bank, channel, range, and mode
ai_bank = Bank.A
ai_channel = AIChannel.AI0
ai_range = AIRange.PLUS_OR_MINUS_10V
ai_mode = AIMode.SINGLE_ENDED
##############################################################################
# Section 1: Single Point (1 Sample)
# Use the read function to read a single point of data back from the channel. The
# hardware acquires one sample for a channel.
##############################################################################
print('Single Point, Single Channel')
# configure the AI channel
with AnalogInput({
'bank': ai_bank,
'channel': ai_channel,
'range': ai_range,
'mode': ai_mode
}) as AI_single_channel:
# read from the AI channel and display the values 20 times
for i in range(0, 20):
# read the value
value_array = AI_single_channel.read()
# print the value
print(value_array[0])
# add a short delay before acquiring the next data point
time.sleep(0.001)
##############################################################################
# Section 2: Multiple Points (n samples)
# Use the read function to read multiple points of data from the channel. The
def test_OpenWithoutRange_DoesnotShowAssertion(self):
AnalogInput({
'bank': bankA,
'channel': AIChannel.AI0,
'mode': AIMode.SINGLE_ENDED
})
def setUpClass(self):
self.AI = AnalogInput({'bank': bankA, 'channel': AIChannel.AI2})
class Test_AnalogInput_StartAssertion(unittest.TestCase):
def setUp(self):
self.AI_single_channel = AnalogInput({
'bank': bankA,
'channel': AIChannel.AI2,
'range': AIRange.PLUS_OR_MINUS_5V,
'mode': AIMode.SINGLE_ENDED
})
self.AI_multiple_channels = AnalogInput(
{
'bank': bankA,
'channel': AIChannel.AI2,
'range': AIRange.PLUS_OR_MINUS_10V
}, {
'bank': bankA,
'channel': AIChannel.AI2,
'mode': AIMode.DIFFERENTIAL
})
@classmethod
def setUpClass(self):
self.sample_rate_limits_for_multiple_channels = {
'max': 250000,
'min': 1
}
def tearDown(self):
self.AI_single_channel.close()
self.AI_multiple_channels.close()
def test_PassSampleRateThatLessThanMinToSingleChannel_ShowAssertion(self):
with self.assertRaises(AssertionError):
self.AI_single_channel.start_continuous_mode(
limits['sampleRate']['min'] - 1)
def test_PassSampleRateThatGreaterThanMaxToSingleChannel_ShowAssertion(
self):
with self.assertRaises(AssertionError):
self.AI_single_channel.start_continuous_mode(
limits['sampleRate']['max'] + 1)
def test_PassSampleRateThatLessThanMinToTwoChannels_ShowAssertion(self):
with self.assertRaises(AssertionError):
self.AI_multiple_channels.start_continuous_mode(
self.sample_rate_limits_for_multiple_channels['min'] - 1)
def test_PassSampleRateThatGreaterThanMaxToTwoChannels_ShowAssertion(self):
with self.assertRaises(AssertionError):
self.AI_multiple_channels.start_continuous_mode(
self.sample_rate_limits_for_multiple_channels['max'] + 1)
def setUp(self):
self.AO_multiple_channels = AnalogOutput({'bank': bank, 'channel': AOChannel.AO0},
{'bank': bank, 'channel': AOChannel.AO1})
self.AI_multiple_channels = AnalogInput({'bank': bank, 'channel': AIChannel.AI0},
{'bank': bank, 'channel': AIChannel.AI3})
class Test_AnalogInputAndOutput_WriteSingleChannel(unittest.TestCase):
def setUp(self):
self.AO_single_channel = AnalogOutput({'bank': bank, 'channel': AOChannel.AO0})
self.AI_single_channel = AnalogInput({'bank': bank, 'channel': AIChannel.AI0})
def tearDown(self):
self.AO_single_channel.close()
self.AI_single_channel.close()
def __start_thread(self, irq_thread):
irq_thread.start()
self.run = True
def __close_thread(self, irq_thread):
self.run = False
irq_thread.join()
def __reading_thread(self, read_object, number_of_samples, sample_rate, expected_value):
value_array = None
while self.run:
value_array = read_object.read(number_of_samples, sample_rate)[0][0]
values = [ round(value) for value in value_array ]
print('%s should almost equal to %s' % (values, expected_value))
def test_WriteSinglePoint_ReturnExpectedReadBack(self):
input_value = 2.0
self.AO_single_channel.write(input_value)
value_array = self.AI_single_channel.read()
for value in value_array:
self.assertEqual(value, pytest.approx(input_value, 0.1))
def test_WriteSinglePoint_ReturnDifferentValueFromEachChannel(self):
AO_multiple_channels = AnalogOutput({'bank': bank, 'channel': AOChannel.AO0},
{'bank': bank, 'channel': AOChannel.AO1})
AI_multiple_channels = AnalogInput({'bank': bank, 'channel': AIChannel.AI0},
{'bank': bank, 'channel': AIChannel.AI3})
input_value_for_single_channels = 2.5
input_value_for_multiple_channels = 3.3
AO_multiple_channels.write(input_value_for_multiple_channels)
self.AO_single_channel.write(input_value_for_single_channels)
value_array = AI_multiple_channels.read()
for index, value in enumerate(value_array):
if index == 0:
self.assertEqual(value, pytest.approx(input_value_for_single_channels, 0.1))
else:
self.assertEqual(value, pytest.approx(input_value_for_multiple_channels, 0.1))
AO_multiple_channels.close()
AI_multiple_channels.close()
def test_WriteTensPointWithOneThousandSampleRate_ReturnExpectedReadBack(self):
sample_rate = 1000
input_value = [1,1,2,2,3,3,4,4,5,5]
expected_value = '1,1,2,2,3,3,4,4,5,5'
irq_thread = threading.Thread(target=self.__reading_thread, args=(self.AI_single_channel, len(input_value), sample_rate, expected_value))
self.__start_thread(irq_thread)
self.AO_single_channel.write(input_value, sample_rate)
self.__close_thread(irq_thread)
def test_WriteTenPointsThenWriteSinglePointInBankB_ReturnExpectedReadBack(self):
AO0 = AnalogOutput({'bank': Bank.B, 'channel': AOChannel.AO0})
AI0 = AnalogInput({'bank': Bank.B, 'channel': AIChannel.AI0})
def __multipleWriteAndRead():
sample_rate = 1000
input_value = [7,7,7,7,7,7,7,5,5,10]
expected_value = '7,7,7,7,7,7,7,5,5,10'
irq_thread = threading.Thread(target=self.__reading_thread, args=(AI0, len(input_value), sample_rate, expected_value))
self.__start_thread(irq_thread)
AO0.write(input_value, sample_rate)
self.__close_thread(irq_thread)
def __singleWriteAndRead():
input_value = 3.2
AO0.write(input_value)
value = AI0.read()[0]
self.assertEqual(value, pytest.approx(input_value, 0.1))
__multipleWriteAndRead()
__singleWriteAndRead()
AO0.close()
AI0.close()
