# Version 1.1 Created 30/04/2014 # # Requires python smbus to be installed with: sudo apt-get install python-smbus # run with: sudo python iopiread.py # ================================================ # This example reads the first 8 pins of bus 1 on the IO Pi board. The internal pull-up resistors are enabled so each pin will read as 1 unless the pin is connected to ground. # Initialise the IOPi device using the default addresses, you will need to change the addresses if you have changed the jumpers on the IO Pi bus1 = IOPI(0x20) # We will read the inputs 1 to 8 from bus 2 so set port 0 to be inputs and enable the internal pull-up resistors bus1.setPortDirection(0, 0xFF) bus1.setPortPullups(0, 0xFF) while True: # clear the console os.system('clear') # read the pins 1 to 8 and print the results print 'Pin 1: ' + str(bus1.readPin(1)) print 'Pin 2: ' + str(bus1.readPin(2)) print 'Pin 3: ' + str(bus1.readPin(3)) print 'Pin 4: ' + str(bus1.readPin(4)) print 'Pin 5: ' + str(bus1.readPin(5)) print 'Pin 6: ' + str(bus1.readPin(6)) print 'Pin 7: ' + str(bus1.readPin(7)) print 'Pin 8: ' + str(bus1.readPin(8)) # wait 0.5 seconds before reading the pins again time.sleep(0.1)
# This example uses the writePin and writePort methods to switch pin 1 on and off on the IO Pi. #!/usr/bin/python from ABElectronics_IOPi import IOPI import time bus = IOPI(0x21) bus.setPinDirection(1, 1) # set pin 1 as an input bus.setPinDirection(8, 0) # set pin 8 as an output bus.writePin(8,0) # turn off pin 8 bus.setPinPullup(1, 1) # enable the internal pull-up resistor on pin 1 bus.invertPin(1, 1) # invert pin 1 so a button press will register as 1 while True: if bus.readPin(1) == 1: # check to see if the button is pressed print 'button pressed' # print a message to the screen bus.writePin(8, 1) # turn on the led on pin 8 time.sleep(2) # wait 2 seconds else: bus.writePin(8, 0) # turn off the led on pin 8