Date: Tue, 26 May 2015 09:13:44 +0300 From: Daniel Braniss <danny@cs.huji.ac.il> To: Luiz Otavio O Souza <lists.br@gmail.com> Cc: freebsd-arm <freeBSD-arm@freebsd.org> Subject: Re: pwm for raspberry pi? Message-ID: <DB799EA8-3401-46F6-A4F5-79E5BE9743E2@cs.huji.ac.il> In-Reply-To: <CAB=2f8wigyRaP9fXr6V=-%2BM9YZTE=2nzdj-AngD6m15zZFu1gQ@mail.gmail.com> References: <1FD1336E-D99F-4114-AD33-FBA1DF844E93@cs.huji.ac.il> <CAB=2f8wigyRaP9fXr6V=-%2BM9YZTE=2nzdj-AngD6m15zZFu1gQ@mail.gmail.com>
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> On May 26, 2015, at 1:14 AM, Luiz Otavio O Souza <lists.br@gmail.com> = wrote: >=20 > On 25 May 2015 at 07:52, Daniel Braniss wrote: >> Hi, >> Now that I=E2=80=99m rapping up my spi/rfid driver (available on = demand :-), >> I would like to use the pwm interface to power on/off a lock, but >> have no idea how to go around it, so any clues would be mostly = welcomed. >>=20 >> cheers, >> danny >=20 > The PWM module is quite simple and has only two outputs, they can be > used only with recent 40 GPIO pins header (RPi-B+ or RPi2), in the > older models only one output was wired. >=20 I do have a B+ > The bcm2835 peripherals datasheet describes the PWM module registers I=E2=80=99ve read it, hence I know it=E2=80=99s possible, what I=E2=80=99 = missing is how to access it via FreeBSD. There is a some mention for the BeagleBoneBlack, but it seems broken, the FDT mentions the pins. Too many leads but not enough info on how to tie them up :-) cheers, danny
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