Check Servo PWM frequency

[ladyada]

hiya @hathach can you check the PWM frequency of the Servos? accordng to this person they are 640Hz instead of 50Hz?
https://forums.adafruit.com/viewtopic.php?f=57&t=137278

see also:
#68

[hathach]

Note to my self, check out #134

[ladyada]

@hathach hi thach - do you mind looking at this bug this week? we had a few questions about it. let me know if you need help setting up a test!

[hathach]

Ah sorry, I am a bit hooked up with usb. Will work on to resolve this.

[ladyada]

no worries, i know USB is very consuming :) perhaps in the next week, i think its just a divider somewhere for a timer.

[hathach]

thanks, I will update when i fixed this, hopefully still in this week.

[hathach]

indeed it is somehow have freq around 640hz. Hooking scope to test now

[hathach]

should be fixed with commit 456cb4a . I will go through the forum to see if there is any other bugs to fix. Then bundle them as 0.8.4 release.