# Version 1.1 Updated 11/06/2017 updated to include changes to Expander Pi library # # Requires python smbus to be installed with: sudo apt-get install python3-smbus # run with: sudo python3 demo-iointerrupts.py # ================================================ # This example shows how to use the interrupt methods on the Expander Pi IO port. # 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 read_interrupt_capture or read_port methods will reset the # interrupts. # Initialise the IOPi and create an instance called io. """ io = IO() # Set all pins on the IO bus to be inputs with internal pull-ups disabled. io.set_port_pullups(0, 0x00) io.set_port_pullups(1, 0x00) io.set_port_direction(0, 0xFF) io.set_port_direction(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 io.set_interrupt_polarity(1) io.mirror_interrupts(0) # Set the interrupts default value to trigger when 5V is applied to pins 1 # and 16
================================================
ABElectronics Expander Pi | Digital I/O Interrupts Demo
Version 1.0 Created 21/08/2014
Version 1.1 Updated 11/06/2017 updated to include changes to Expander Pi library
Requires python smbus to be installed with: sudo apt-get install python3-smbus
run with: sudo python3 demo-iowrite.py
================================================
This example uses the write_pin and writeBank methods to switch the pins
on and off on the I/O bus.
Initialise the IO class and create an instance called io.
"""
io = IO()
# We will write to the pins 9 to 16 so set port 1 to be outputs turn off
# the pins
io.set_port_direction(1, 0x00)
io.write_port(1, 0x00)
while True:
# count to 255 and display the value on pins 9 to 16 in binary format
for x in range(0, 255):
time.sleep(0.05)
io.write_port(1, x)
# turn off all of the pins on bank 1
io.write_port(1, 0x00)
import time
import os
# ================================================
# ABElectronics Expander Pi | Tester
# Version 1.0 Created 08/11/2014
# Version 1.1 Updated 11/06/2017 updated to include changes to Expander Pi library
#
# run with: python tester.py
# ================================================
# This script tests the various functionality of the Expander Pi
rtc = RTC() # create a new instance of the RTC class
adc = ADC() # create an instance of the ADC class
io = IO() # create an instance of the IO class
dac = DAC(1) # create an instance of the DAC class with a gain of 0
# set the date using ISO 8601 format - YYYY-MM-DDTHH:MM:SS
rtc.set_date("2017-01-01T00:00:00")
dac.set_dac_voltage(1, 1.5) # set the voltage on channel 1 to 1.5V
dac.set_dac_voltage(2, 1.0) # set the voltage on channel 2 to 1.0V
# set the reference voltage. this should be set to the exact voltage
# measured on the Expander Pi Vref pin.
adc.set_adc_refvoltage(4.096)
while True:
# clear the console
os.system('clear')
Version 1.0 Created 21/08/2014
Requires python smbus to be installed with: sudo apt-get install python-smbus
run with: sudo python demo-iowrite.py
================================================
This example uses the write_pin and writeBank methods to switch the pins
on and off on the I/O bus.
Initialise the IO class and create an instance called io.
"""
i2c_helper = ABEHelpers()
bus = i2c_helper.get_smbus()
io = IO(bus)
# We will write to the pins 9 to 16 so set port 1 to be outputs turn off
# the pins
io.set_port_direction(1, 0x00)
io.write_port(1, 0x00)
while True:
# count to 255 and display the value on pins 9 to 16 in binary format
for x in range(0, 255):
time.sleep(0.05)
io.write_port(1, x)
# turn off all of the pins on bank 1
io.write_port(1, 0x00)
ABElectronics Expander Pi | Digital I/O Interrupts Demo
Version 1.0 Created 21/08/2014
Version 1.1 Updated 11/06/2017 updated to include changes to Expander Pi library
Requires python smbus to be installed with: sudo apt-get install python3-smbus
run with: sudo python3 demo-ioread.py
================================================
This example reads the first 8 pins of on the Expander Pi Digital I/O
port. The internal pull-up resistors are enabled so each pin will read
as 1 unless the pin is connected to ground.
Initialise the IO class and create an instance called io.
"""
io = IO()
# We will read the inputs 1 to 16 from the I/O bus so set port 0 and port 1 to be
# inputs and enable the internal pull-up resistors
io.set_port_direction(0, 0xFF)
io.set_port_pullups(0, 0xFF)
io.set_port_direction(1, 0xFF)
io.set_port_pullups(1, 0xFF)
while True:
# clear the console
os.system('clear')
# read the pins 1 to 16 and print the results
print ('Pin 1: ' + str(io.read_pin(1)))
intA = io.read_interrupt_status(0)
# reset the interrupts
io.reset_interrupts()
# check the value of intA to see if an interrupt has occurred
if (intA != 0):
callback_function()
# sleep this thread for 0.5 seconds
time.sleep(0.5)
i2c_helper = ABEHelpers()
bus = i2c_helper.get_smbus()
io = IO(bus)
# Set all pins on the IO bus to be inputs with internal pull-ups enabled.
io.set_port_pullups(0, 0xFF)
io.set_port_pullups(1, 0xFF)
io.set_port_direction(0, 0xFF)
io.set_port_direction(1, 0xFF)
# invert the ports so pulling a pin to ground will show as 1 instead of 0
io.invert_port(0, 0xFF)
io.invert_port(1, 0xFF)
# Set the interrupt polarity to be active high and mirroring enabled, so
# pin 1 will trigger both INT A and INT B when a pin is grounded
io.set_interrupt_polarity(1)
ABElectronics Expander Pi | Digital I/O Interrupts Demo
Version 1.0 Created 29/03/2015
run with: python3 demo-ioread.py
================================================
This example reads the first 8 pins of on the Expander Pi Digital I/O
port. The internal pull-up resistors are enabled so each pin will read
as 1 unless the pin is connected to ground.
Initialise the IO class and create an instance called io.
"""
i2c_helper = ABEHelpers()
bus = i2c_helper.get_smbus()
io = IO(bus)
# We will read the inputs 1 to 8 from the I/O bus so set port 0 to be
# inputs and enable the internal pull-up resistors
io.set_port_direction(0, 0xFF)
io.set_port_pullups(0, 0xFF)
while True:
# clear the console
os.system('clear')
# read the pins 1 to 8 and print the results
print ('Pin 1: ' + str(io.read_pin(1)))
print ('Pin 2: ' + str(io.read_pin(2)))
print ('Pin 3: ' + str(io.read_pin(3)))
print ('Pin 4: ' + str(io.read_pin(4)))
# reset the interrupts
io.reset_interrupts()
# check the value of intA to see if an interrupt has occurred
if (intA != 0):
callback_function()
# sleep this thread for 0.5 seconds
time.sleep(0.5)
i2c_helper = ABEHelpers()
bus = i2c_helper.get_smbus()
io = IO(bus)
# Set all pins on the IO bus to be inputs with internal pull-ups enabled.
io.set_port_pullups(0, 0xFF)
io.set_port_pullups(1, 0xFF)
io.set_port_direction(0, 0xFF)
io.set_port_direction(1, 0xFF)
# invert the ports so pulling a pin to ground will show as 1 instead of 0
io.invert_port(0,0xFF)
io.invert_port(1,0xFF)
# Set the interrupt polarity to be active high and mirroring enabled, so
# pin 1 will trigger both INT A and INT B when a pin is grounded
io.set_interrupt_polarity(1)
# Version 1.1 Updated 11/06/2017 updated to include changes to Expander Pi library # # Requires python smbus to be installed with: sudo apt-get install python3-smbus # run with: sudo python3 demo-iointerrupts.py # ================================================ # This example shows how to use the interrupt methods on the Expander Pi IO port. # 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 read_interrupt_capture or read_port methods will reset the # interrupts. # Initialise the IOPi and create an instance called io. """ io = IO() # Set all pins on the IO bus to be inputs with internal pull-ups disabled. io.set_port_pullups(0, 0x00) io.set_port_pullups(1, 0x00) io.set_port_direction(0, 0xFF) io.set_port_direction(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 io.set_interrupt_polarity(1) io.mirror_interrupts(0) # Set the interrupts default value to trigger when 5V is applied to pins 1 # and 16
ABElectronics Expander Pi | Digital I/O Interrupts Demo
Version 1.0 Created 21/08/2014
Version 1.1 Updated 11/06/2017 updated to include changes to Expander Pi library
Requires python smbus to be installed with: sudo apt-get install python3-smbus
run with: sudo python3 demo-ioread.py
================================================
This example reads the first 8 pins of on the Expander Pi Digital I/O
port. The internal pull-up resistors are enabled so each pin will read
as 1 unless the pin is connected to ground.
Initialise the IO class and create an instance called io.
"""
io = IO()
# We will read the inputs 1 to 16 from the I/O bus so set port 0 and port 1 to be
# inputs and enable the internal pull-up resistors
io.set_port_direction(0, 0xFF)
io.set_port_pullups(0, 0xFF)
io.set_port_direction(1, 0xFF)
io.set_port_pullups(1, 0xFF)
while True:
# clear the console
os.system('clear')
# read the pins 1 to 16 and print the results
print('Pin 1: ' + str(io.read_pin(1)))
import os
# ================================================
# ABElectronics Expander Pi | Tester
# Version 1.0 Created 29/03/2015
#
# run with: python3 tester.py
# ================================================
# This script tests the various functionality of the Expander Pi
i2c_helper = ABEHelpers()
bus = i2c_helper.get_smbus()
rtc = RTC(bus) # create a new instance of the RTC class
adc = ADC() # create an instance of the ADC class
io = IO(bus) # create an instance of the IO class
dac = DAC() # create an instance of the DAC class
# set the date using ISO 8601 format - YYYY-MM-DDTHH:MM:SS
rtc.set_date("2014-01-01T00:00:00")
dac.set_dac_voltage(1, 1.5) # set the voltage on channel 1 to 1.5V
dac.set_dac_voltage(2, 1.0) # set the voltage on channel 2 to 1.0V
# set the reference voltage. this should be set to the exact voltage
# measured on the Expander Pi Vref pin.
adc.set_adc_refvoltage(4.096)
while True:
# clear the console
os.system('clear')
