def __init__(self, dout_pin, pd_sck_pin, gain_channel_A=128, select_channel='A'):
if (isinstance(dout_pin, int) and
isinstance(pd_sck_pin, int)): # just chack of it is integer
self._pd_sck = pd_sck_pin # init pd_sck pin number
self._dout = dout_pin # init data pin number
else:
raise TypeError('dout_pin and pd_sck_pin have to be pin numbers.\nI have got dout_pin: '\
+ str(dout_pin) + \
' and pd_sck_pin: ' + str(pd_sck_pin) + '\n')
self._gain_channel_A = 0 # init to 0
self._offset_A_128 = 0 # init offset for channel A and gain 128
self._offset_A_64 = 0 # init offset for channel A and gain 64
self._offset_B = 0 # init offset for channel B
self._last_raw_data_A_128 = 0 # init last data to 0 for channel A and gain 128
self._last_raw_data_A_64 = 0 # init last data to 0 for channelA and gain 64
self._last_raw_data_B = 0 # init last data to 0 for channel B
self._wanted_channel = '' # init to empty string
self._current_channel = '' # init to empty string
self._scale_ratio_A_128 = 1 # init to 1
self._scale_ratio_A_64 = 1 # init to 1
self._scale_ratio_B = 1 # init to 1
self._debug_mode = False # init debug mode to False
self._pstdev_filter = True # pstdev filter is by default ON
GPIO.setmode(GPIO.BCM) # set GPIO pin mode to BCM numbering
GPIO.setup(self._pd_sck, GPIO.OUT) # pin _pd_sck is output only
GPIO.setup(self._dout, GPIO.IN) # pin _dout is input only
self.select_channel(select_channel) # call select channel function
self.set_gain_A(gain_channel_A) # init gain for channel A
############################################################
# select_channel function evaluates if the desired channel #
# is valid and then sets the _wanted_channel. #
# If returns True then OK #
# INPUTS: channel ('A'|'B') #
# OUTPUTS: BOOL #
############################################################
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