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gpio_inputs_-_button_led_control_using_an_interrupt

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gpio_inputs_-_button_led_control_using_an_interrupt [2016/08/09 23:04] – walkeradmingpio_inputs_-_button_led_control_using_an_interrupt [2016/08/09 23:09] – walkeradmin
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 The previous example of using a button to light an LED, everything worked fine, but our processor was at 100%, this needs fixing, so in this example instead of constantly polling and setting GPIO pins, we are using a interrupt where by we do nothing until a button is actually pressed. The previous example of using a button to light an LED, everything worked fine, but our processor was at 100%, this needs fixing, so in this example instead of constantly polling and setting GPIO pins, we are using a interrupt where by we do nothing until a button is actually pressed.
 +\\ 
 \\  \\ 
 Create a new file in the normal way ( you can download the python file {{ :led-button-i.zip |here}} to save time) Create a new file in the normal way ( you can download the python file {{ :led-button-i.zip |here}} to save time)
 \\  \\ 
 +    sudo nano LED-Button-i.py
 +
     #import modules     #import modules
     import RPi.GPIO as GPIO    # This imports the GPIO library that allows the use of the GPIO pins,     import RPi.GPIO as GPIO    # This imports the GPIO library that allows the use of the GPIO pins,
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     #End     #End
 +\\ 
 +Once you have your file saved, you can run it by using:
 +\\ 
 +    sudo python LED-Button-i.py
 +\\ 
 +===== Example Output =====
 +\\ 
 +Here you can see the code running {{ :led-button-i.mp4 |(video)}}
 +\\ 
 +The main advantage using the **interrupt** is that my processor occupancy on the Pi Zero is now around 10% normal, and 14% when I press the button. That's much better than the previous constant 100%.
 +\\ 
 +\\ 
 +