beagleboneblack_pwm.js

//
var b = require('bonescript');

// configure PWM pins as output

b.pinMode('P8_13', b.OUTPUT);
b.pinMode('P8_19', b.OUTPUT);
b.pinMode('P9_14', b.OUTPUT);
b.pinMode('P9_16', b.OUTPUT);

// generate 490Hz 49% duty-cycle => ESC/motor minimal throttle

b.analogWrite('P8_13', 0.49, 490, printStatus);
b.analogWrite('P8_19', 0.49, 490, printStatus);
b.analogWrite('P9_14', 0.49, 490, printStatus);
b.analogWrite('P9_16', 0.49, 490, printStatus);

// callback

function printStatus(x) {
    console.log('x.value = ' + x.value);
    console.log('x.err = ' + x.err);
}