documentation error in pwmWrite

(5 posts) (2 voices)

manitou
Member

The little sketch example for pwmWrite() in
http://leaflabs.com/docs/lang/api/pwmwrite.html#lang-pwmwrite
is not correct. BOARD_LED_PIN is NOT a PWM pin on any of the maples. And the pinmode should be PWM not OUTPUT. The examples/analog/fading sketch is correct, using pin 9 in PWM mode.

Also, I measure the PWM frequeny at 549 Hz. The documentation at
http://leaflabs.com/docs/lang/api/analogwrite.html#difference-4-pwm-frequency
says 1100Hz. (72000000/2/65536)

Posted 3 years ago #
crenn
Moderator

BOARD_LED_PIN is a PWM for the Maple Mini however the rest of the Maples do not. I'll try to raise it with leaflabs.

Posted 3 years ago #
manitou
Member

Hmmm, from the Mini docs

BOARD_LED_PIN: 33
boardPWMPins: 3, 4, 5, 8, 9, 10, 11, 15, 16, 25, 26, 27

?

Posted 3 years ago #
crenn
Moderator

That's incorrect, it's conflicted by the timer table, unless there is a limitation I don't know about. Although... it could be that way due to the fact you can't access those pins unless you add in some wires to the top.

Posted 3 years ago #
manitou
Member

The Mini schematic shows pin 33 going to LED but not to a header ...

Posted 3 years ago #

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