Problem with the PWM

[ghost]

Hi, when I try to use the PWM I have this problem on cloud9:

There was an error writing analog value: Fail to update PWM duty: ENOENT, open 'undefined/duty ns'

Suggestions?

[adityapatadia]

Please give your code here. If possible also output of DEBUG=bone node yourscript.js

[ghost]

Here the code:

var b = require('octalbonescript');

var motorSpeed = 'P9_21';
var enM1 = 'P9_15';
var M1 = 'P9_16';

b.pinMode(motorSpeed, b.ANALOG_OUTPUT, function(err1) {
  if (err1) {
    console.error(err1.message); 
    return;
 }
});

b.pinModeSync(M1, b.OUTPUT);
b.digitalWriteSync(M1, b.LOW);

b.pinModeSync(enM1, b.OUTPUT);
b.digitalWriteSync(enM1, b.HIGH);

b.analogWrite(motorSpeed, 0.5, 2000, function(err2) {
      if (err2) {
        console.error(err2.message); //output any error
        return;
      }
});

ps: where is the output of the debug?

[adityapatadia]

It will be there in the terminal form where you run your script. Rather than running script from cloud9, I suggest you ssh into bone and run the script by command I provided above.

[adityapatadia]

The problem is that first pinMode on motorSpeed is not yet complete and you called analogWrite on it. Please use pinModeSync there too, or write your code in callback function of pinMode