Files
r_e_c_u_r/user_input/analog_input.py
2019-06-08 13:07:50 +00:00

84 lines
3.4 KiB
Python

import Adafruit_GPIO.SPI as SPI
import Adafruit_MCP3008
class AnalogInput(object):
def __init__(self, root, message_handler, display, actions, data):
self.root = root
self.message_handler = message_handler
self.display = display
self.actions = actions
self.data = data
self.analog_mappings = data.analog_mappings
self.analog_delay = 50
self.last_readings = [0,0,0,0,0,0,0,0]
self.analog_input = None
self.check_if_listening_enabled()
def check_if_listening_enabled(self):
if self.data.settings['other']['ANALOG_INPUT']['value'] == 'enabled':
if not self.analog_input:
try:
## note - using software spi for now although on the same pins as the hardware spi described below because hardware spi wasnt working with lcd display
#SPI_PORT = 1
#SPI_DEVICE = 2
#self.analog_input = Adafruit_MCP3008.MCP3008(spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE))
CLK = 21
MISO = 19
MOSI = 20
CS = 16
self.analog_input = Adafruit_MCP3008.MCP3008(clk=CLK, cs=CS, miso=MISO, mosi=MOSI)
except:
self.message_handler('INFO', 'analog inputs not connected')
self.poll_analog_inputs()
else:
self.root.after(1000, self.check_if_listening_enabled)
def poll_analog_inputs(self):
if self.data.settings['other']['ANALOG_INPUT']['value'] == 'enabled':
for i in range(0,8):
if str(i) in self.analog_mappings:
this_reading = self.analog_input.read_adc(i)
#print(str(this_reading))
if abs(this_reading - self.last_readings[i]) > 10:
#print('the diff is {}'.format(this_reading - self.last_readings[i]))
self.run_action_for_mapped_channel(i, this_reading)
self.last_readings[i] = this_reading
self.root.after(self.analog_delay, self.poll_analog_inputs)
else:
self.check_if_listening_enabled()
def run_action_for_mapped_channel(self, channel, channel_value):
this_mapping = self.analog_mappings[str(channel)]
if self.data.control_mode in this_mapping:
mode = self.data.control_mode
elif 'DEFAULT' in this_mapping:
mode = 'DEFAULT'
if self.data.function_on and len(this_mapping[mode]) > 1:
method_name = this_mapping[mode][1]
self.data.function_on = False
else:
method_name = this_mapping[mode][0]
if channel_value is not None:
norm_channel_value = channel_value/1023
else:
norm_channel_value = None
print('the action being called is {}'.format(method_name))
self.call_method_name(method_name, norm_channel_value)
## not sure whether we want to update the screen in general; here - probably not most of the time ...
#if 'cc' not in message_name:
# self.display.refresh_display()
def call_method_name(self, method_name, argument=None):
if argument is not None:
getattr(self.actions, method_name)(argument)
else:
getattr(self.actions, method_name)()