102 lines
3.4 KiB
Python
102 lines
3.4 KiB
Python
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import logging
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import pyvisa
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from pyvisa import constants
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logger = logging.getLogger(__name__)
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logger.addHandler(logging.NullHandler())
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def get_oscilloscopes():
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rm = pyvisa.ResourceManager('@py')
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return rm.list_resources(query = '?*::INSTR')
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class Oscilloscope:
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def __init__(self, oscilloscope_id):
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rm = pyvisa.ResourceManager('@py')
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resources = rm.list_resources(query = '?*::INSTR')
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self.resource = rm.open_resource(
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resources[oscilloscope_id],
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read_termination = '\n',
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write_termination = '\n')
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self.resource.timeout = 20000
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logger.debug('timeout set to %dms', self.resource.timeout)
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self.resource.query_delay = 0.1
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logger.debug('query_delay set to %fs', self.resource.query_delay)
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# self.query = self.resource.query
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self.write('*CLS')
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print('connected to the oscilloscope with *IDN:',
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self.query('*IDN?'))
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def __del__(self):
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self.close()
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def close(self):
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logger.debug('closing oscilloscope...')
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self.resource.close()
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def write(self, *args):
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logger.debug('%s', ', '.join(map(str, args)))
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return self.resource.write(*args)
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def query(self, *args):
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logger.debug('%s...', ', '.join(map(str, args)))
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data = self.resource.query(*args)
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logger.debug('%s %s', args[0], data)
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return data
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def command_binary(self, query, data: bytes):
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logger.debug('%s, len: %d', query, len(data))
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return self.resource.write_binary_values(
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query,
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data,
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datatype='B')
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def query_binary(self, query):
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logger.debug('%s...', query)
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data = self.resource.query_binary_values(
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query,
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datatype='B',
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container = bytes)
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logger.debug('%s, len: %d', query, len(data))
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return data
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def query_check(self, command):
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print(command, self.resource.query(command+'?'))
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def command_check(self, command, value):
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data = self.resource.write(command + ' ' + value)
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self.query_check(command)
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return data
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def save_conf(self, filename):
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logger.debug('to filename %s', filename)
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data = self.query_binary(':SYSTem:SETup?')
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out_file = open(filename, 'wb')
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len_written = out_file.write(data)
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out_file.close()
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logger.debug('read %d, written %d', len(data), len_written)
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return len(data) - len_written
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def load_conf(self, filename):
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logger.debug('from filename %s', filename)
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in_file = open(filename, 'rb')
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data = in_file.read()
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len_written = self.command_binary(':SYSTem:SETup ', data)
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in_file.close()
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logger.debug('read %d, written %d', len(data), len_written)
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return len(data) - len_written
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def setup_measurement(self):
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logger.debug('')
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self.command_check(":ACQuire:TYPE", "Normal")
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# self.command_check(":ACQuire:COUNt", "2")
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self.command_check(":TIMebase:MODE", "MAIN")
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self.command_check(":WAVeform:UNSigned", "1")
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self.command_check(":WAVeform:BYTeorder", "LSBFirst")
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self.command_check(":WAVeform:FORMat", "BYTE")
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self.command_check(":WAVeform:SOURce", "CHANnel1")
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self.command_check(":WAVeform:POINts:MODE", "RAW")
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self.command_check(":ACQuire:COMPlete", "100")
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