BoneScript
You might be able to see a newer version of this on beagleboard.org/support/bonescript/digitalRead
digitalRead(pin, [callback])
Read the status of a digital I/O pin.
Arguments
- pin: the BeagleBone pin identifier
- callback: called upon completion
Return value
callback(x)
- x.value: return value
- x.err: error status message
Example
var b = require('bonescript');
b.pinMode('P8_19', b.INPUT);
b.digitalRead('P8_19', printStatus);
function printStatus(x) {
console.log('x.value = ' + x.value);
console.log('x.err = ' + x.err);
}
Build and execute instructions
- Apply 0V to P8_19 and run the example code.
- Apply 3.3V to P8_19 and run the example code again.
- Alter the code to look at inputs on other pins.
