Bonescript : AnalogWrite error

[Md Khaled Hossain]

Here I am trying to turn on a buzzer for one second and then turn it off. Here is the code

#!/usr/bin/env node
var b = require('bonescript');

b.pinMode('P8_19', b.ANALOG_OUTPUT);


b.analogWrite('P8_19', 0.5, 2000.0, printStatus);

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

setTimeout(function() {
        b.analogWrite('P8_19', b.low);     // Turn off buzzer after milliseconds time
    }, 1000);

This code gives the following error after i try to run it immediately after reboot
error: Error enabling PWM controls: Error: ENOENT, no such file or directory '/sys/devices/ocp.3/bs_pwm_

test_P8_19.15/polarity'

how to solve the problem?

[evilwulfie]

Have you loaded the PWM overlay ?

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[evilwulfie]

One more tidbit
http://beagleboard.org/support/BoneScript/analogWrite/

Note: This function is currently incompatible with pinMode which may force the pin mux to GPIO mode only.

On 6/4/2016 10:31 PM, Md Khaled Hossain wrote:

[William Hermans]

In which case. Unless you need something around 1-2Khz( at most ), Nodejs wont cut it.

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[Md Khaled Hossain]

how to load the PWM overlay?

[Md Khaled Hossain]

william, I have tried with 1.5khz still the problem is same.