# 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
