def row_changed(row):
global rows
GPIO.remove_event_detect(row)
GPIO.setup(row, GPIO.OUT)
for column in rows[row]:
GPIO.setup(column, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
# Send signal from row to columns
GPIO.output(row, 1)
#sleep(0.05)
# Read which column it was
for column in rows[row]:
columnValue = GPIO.input(column)
if(columnValue):
key = keys[str(row) + "," + str(column)]
logging.info("row changed: " + str(row))
send_key(key)
# Set row and columns back to original setup
GPIO.setup(row, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
for column in rows[row]:
GPIO.remove_event_detect(column)
GPIO.setup(column, GPIO.OUT)
GPIO.output(column, 1)
GPIO.add_event_detect(row, GPIO.RISING, callback=row_changed)
def removeEventListner(self):
GPIO.remove_event_detect(self.Pin)
