Messages in this thread | | | Date | Thu, 11 Feb 2010 21:58:01 +0100 | From | Pavel Machek <> | Subject | Re: [PWM PATCH 2/5] Emulates PWM hardware using a high-resolution timer and a GPIO pin |
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On Thu 2010-02-11 14:35:14, Bill Gatliff wrote: > Pavel Machek wrote: > >> +static void > >> +gpio_pwm_work (struct work_struct *work) > >> +{ > >> + struct gpio_pwm *gp = container_of(work, struct gpio_pwm, work); > >> + > >> + if (gp->active) > >> + gpio_direction_output(gp->gpio, gp->polarity ? 1 : 0); > >> + else > >> + gpio_direction_output(gp->gpio, gp->polarity ? 0 : 1); > >> +} > >> > > > > ...polarity ^ active ? > > > > ... except that if polarity and/or active are >1, I don't send the > values 1 or 0 to gpio_direction_output. I don't know if the API is > specifically intended to accept nonzero values that are greater than 1.
!polarity ^ !active ? :-). Pavel
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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