def start_stream(sensor_pin=14, fs=10):
""" Reads values from analog pin 14 and forwards them to a LSL-stream. """
# Setup the LSL stream
uuid = binascii.b2a_hex(os.urandom(3))
stream_info = lsl.StreamInfo('luminosity', 'analog', 1, fs, 'float32', uuid)
stream_outlet = lsl.StreamOutlet(stream_info)
# Setup GPIO
gpio = GPIO(debug=False)
gpio.pinMode(sensor_pin, gpio.ANALOG_INPUT)
interval = 1.0 / fs
try:
while True:
value = gpio.analogRead(sensor_pin)
stream_outlet.push_sample([value])
time.sleep(interval)
except KeyboardInterrupt:
print("\nCleaning up...")
gpio.cleanup()
def start_stream(sensor_pin=14, fs=10):
# Setup the LSL stream
uuid = binascii.b2a_hex(os.urandom(3))
stream_info = lsl.StreamInfo('luminosity', 'analog', 1, fs, 'float32', uuid)
stream_outlet = lsl.StreamOutlet(stream_info)
# Setup GPIO
gpio = GPIO(debug=False)
gpio.pinMode(sensor_pin, gpio.ANALOG_INPUT)
interval = 1.0 / fs
try:
while True:
value = gpio.analogRead(sensor_pin)
stream_outlet.push_sample([value])
time.sleep(interval)
except KeyboardInterrupt:
print("\nCleaning up...")
gpio.cleanup()
# Set pin 3 to be used as a PWM pin.
print 'Setting up pin %d' % pin
gpio.pinMode(pin, gpio.PWM)
print 'Fading pin %d now...' % pin
try:
while(True):
# Write brightness to the pin. The value must be between 0 and 255.
gpio.analogWrite(pin, brightness)
# Increment or decrement the brightness.
brightness = brightness + fadeAmount
# If the brightness has reached its maximum or minimum value swap
# fadeAmount sign so we can start fading the led on the other direction.
if brightness == 0 or brightness == 255:
fadeAmount = -fadeAmount
# Sleep for a while.
time.sleep(0.03)
# When you get tired of seeing the led fading kill the loop with Ctrl-C.
except KeyboardInterrupt:
# Leave the led turned off.
print '\nCleaning up...'
gpio.analogWrite(pin, 0)
# Do a general cleanup. Calling this function is not mandatory.
gpio.cleanup()
