only 5 PWM pins possible at a time

[malcolmputer]

Using Angstrom, any of the PWM pin pairs (say "9_14" and "9_16") are not available to be used at the same time.

I believe the actual hardware limitation here is that you must use the same frequency on the two pins, but you may have a different duty cycle.

BBIO does not seem to enable the pins even though the hardware should allow it.

This only allows the use of 5 PWM pins at the same time even after disabling HDMI.

Try for instance:
PWM.start("P9_16", 50, 25000, 1)
PWM.start("P9_22", 50, 25000, 1)
PWM.start("P9_28", 50, 25000, 1)
PWM.start("P9_42", 50, 25000, 1)
PWM.start("P8_13", 50, 25000, 1)

Then try to enable either "P8_34" or "P8_19", and the script will look like it is working, and even add the line to the slots file, but a scope reading will confirm otherwise.

[malcolmputer]

FYI, I am using:
Python 2.7.3 (default, Jul 3 2013, 18:32:36)
BBIO 0.0.13
with the latest Angstrom Image (and all opkg update/upgrades)

[JohnDHH]

I have a problem with P9_16. P9_14 works fine,but not P9_16.
I do:

import Adafruit_BBIO.PWM as PWM
PWM.start("P9_16",10,1000,0)
PWM.set_duty_cycle("P9_16",50)
There is no signal on the pin after the start(), and when I make the third entry I get an error message "You must start() the PWM channel first"

This is using the latest Angstrom image

[pdp7]

@malcolmputer there were several PWM improvements merged from #108. Could you please check if this is still an issue with the latest version?