How to get interrupts through Linux GPIO with the #BeagleBoneBlack @TXInstruments @BeagleBoardOrg
Ben Martin shows us how to receive interrupts through Linux GPIO using the BeagleBone Black.
A previous article looked at the differences between the Arduino and the BeagleBone Black in how you go about accessing chips over the SPI. This time around the focus will be on how to receive interrupts from your hardware on the BeagleBone Black.
The header pins on each side of the BeagleBone Black can be used for General Purpose I/O (GPIO). This way you can set the voltage to high or low, or if you are reading you can see if the voltage is currently high or low on the pin. Generally, high might be 3.3 volts and low would be the common ground voltage. The GPIO support in Linux can optionally generate interrupts when the signal raises from ground to a high voltage, from the high voltage to ground, or if either of these cases occurs.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.