Date: Fri, 13 Nov 1998 11:18:28 +0100 From: Ron Klinkien <root@zappa.demon.nl> To: freebsd-hackers@FreeBSD.ORG Subject: Re: i2c projects Message-ID: <19981113111828.A1539@zappa.demon.nl> In-Reply-To: <19981113001748.14820@breizh.prism.uvsq.fr>; from Nicolas Souchu on Fri, Nov 13, 1998 at 12:17:48AM %2B0000 References: <19981109211837.A4702@zappa.demon.nl> <19981113001748.14820@breizh.prism.uvsq.fr>
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Hello,
On Fri, Nov 13, 1998 at 12:17:48AM +0000, Nicolas Souchu wrote:
> >I want to build a weather station / home automation project using a FreeBSD running pc,
> >and the i2c bus on my video capture card.
>
> Cool. FreeBSD is the good choice.
Yes, it's great for almost anything ;-)
>
> Yes, this is lacking. Waiting for a MAKEDEV update, try:
>
> mknod iic0 c 105 0
> mknod smb0 c 106 0
Ah thanks,
> >Which major/minor numbers to use etc...?
>
> You would have found them in the related drivers:
I also spotted them in majors.i386 as it should.
>
> iicbus is a powerfull framework that should bring you all what you need with
> only few indications about how to use it.
Thats what i'm looking for no worries about timing etc...
> Now, you want to write user/kernel code? If you need kernel code which is
> uncertain, /sys/dev/iicbus/iic.c will be a good start. Read, copy and
> modify it as needed.
No just a normal user code program will do for starters.
The drivers in the kernel seems to work:
-- cut ---
bktr0: <BrookTree 848> rev 0x12 int a irq 10 on pci0.9.0
bti2c0: <bt848 Hard/Soft I2C controller>
iicbb0: <I2C generic bit-banging driver> on bti2c0
iicbus0: <Philips I2C bus> on iicbb0 master-only
Probing for devices on iicbus0: <c0> <c1> <c2> <c3>
smbus0: <System Management Bus> on bti2c0
Miro TV, Temic PAL tuner.
--- cut ---
> { "iic", IICBUS_DEVICE_CLASS, "PCF8574 I2C to 8 bits parallel i/o", 64},
Hmm i happen to have this one... waiting to be soldered onto my experiment board
;-)
> Nicolas.
>
> --
Thanks for your help so far..
Ron.
--
---
Running Solaris/SPARC at work, enjoying FreeBSD/PII at home.
Ron Klinkien System Engineer
ron@zappa.demon.nl http://www.zappa.demon.nl
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