Need workaround for tessel.port['GPIO'].pwm[0] for TM02

[natevw]

I'm having trouble outputting PWM on my TM-00-002 board:

var port = require('tessel').port.GPIO,
    pin = port.pwm[0];
port.pwmFrequency(50);
console.log(pin);
pin.pwmDutyCycle(0.6);

Outputs:

{ pin: 37, isPWM: true, interrupts: {} }
Error: PWM is not suported on this pin

[natevw]

Looks like the variant table for V2 (and V1) does not have the proper flag for PWM: https://github.com/tessel/firmware/blob/e4ddfe70baa22f3cbdb8a9e9ca59e30891c29863/src/variants/lpc18xx/variant.c#L200

Is that an oversight, or does the hardware really not support it?

[kevinmehall]

Only pin G3 supports PWM on those hardware versions. (which is not one of the PWM pins on 03/04 hardware).

[natevw]

Can the JS side be updated so that the correct pin is in the pwm array then? Right now this code doesn't work either:

var tessel = require('tessel'),
    port = tessel.port.GPIO,
    pin = port.digital[2];
port.pwmFrequency(50);
pin.pwmDutyCycle(0.6);

Outputs:

/app/t_pwm.js:6: attempt to call method 'pwmDutyCycle' (a nil value)

[natevw]

workaround:

var tessel = require('tessel'),
    port = tessel.port.GPIO,
    pin = port.pin['G3'];
pin.__proto__ = port.pwm[0].__proto__;
port.pwmFrequency(50);
pin.pwmDutyCycle(0.6);

[jiahuang]

Are you on a Tessel V2 or a V4?

[jiahuang]

derp, nevermind read your opening post