# ================================================ # This example shows how to use the interrupt methods on the IO Pi. # The interrupts will be enabled and set so that a voltage applied to pins 1 and 16 will trigger INT A and B respectively. # using the readInterruptCature or readPort methods will reset the interrupts. # Initialise the IOPi device using the default addresses and set the output of bank 1 on IC1 to the input of bank 1 on IC2 bus1 = IOPI(0x20) bus2 = IOPI(0x21) # Set all pins on bus 2 to be inputs with internal pull-ups disabled. bus2.setPortPullups(0, 0x00) bus2.setPortPullups(1, 0x00) bus2.setPortDirection(0, 0xFF) bus2.setPortDirection(1, 0xFF) # Set the interrupt polarity to be active high and mirroring disabled, so pins 1 to 8 trigger INT A and pins 9 to 16 trigger INT B bus2.setInterruptPolarity(1) bus2.mirrorInterrupts(0) # Set the interrupts default value to trigger when 5V is applied to pins 1 and 16 bus2.setInterruptDefaults(0, 0x01) bus2.setInterruptDefaults(0, 0x80) # Set the interrupt type to be 1 for ports A and B so an interrupt is fired when the pin matches the default value bus2.setInterruptType(0, 1) bus2.setInterruptType(1, 1)
# ================================================
# ABElectronics IO Pi 32-Channel Port Expander - Input Read Demo
# 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))