Re: [microblaze-uclinux] I2C on uClinux

[sky tam <waimingsky1@xxxxxxxxx>]

Hi,
Im this few days, I have tried to patched the kernal to the latest
version. However, I still cant access i2c from my microblaze uClinux.
Here is some question:

1. In the make menuconfig window, I selected i2c support from
character device, and * xilinx on chip and * i2c device interface, is
it enough??
2. where should I type: "i2ctool --help" to list all possible options
3. where should I type: "i2ctool -d /dev/i2c0 -r -a 0x3c -R 0x00 -c 2"

thx
sky


On Wed, 23 Feb 2005 15:05:48 +0100, Hansen Eric
<hansen@shf-communication.de> wrote:
> Hi,
> 
> for testing purposes I have written a little program,
> which sends to an receives from IIC slaves.
> I have attached it to this mail.
> (The makefile assumes that you untar this package
> to the user directory of you uClinux-dist)
> It uses the dev interface, so make shore to check it
> during menuconfig of the kernel.
> You will also need the device nodes for i2c.
> i2ctool --help will list all possible options.
> 
> For example
> 
>  i2ctool -d /dev/i2c0 -r -a 0x3c -R 0x00 -c 2
> 
> will read 2 bytes of data starting from register
> 0 of the device with address 0x3c from the first
> i2c bus. (Assuming you have an i2c capable device
> where you can address the registers this way)
> 
> To see the addresses of the devices attached to the bus
> you may set scan = 1 (in drivers/i2c/xilinx_iic/i2c_algo_xilinx.c)
> 
> Hope this helps
> 
> Cheers,
> Erik
> 
> ****************************
> Erik Hansen
> SHF Communication Technologies AG
> Wilhelm-von-Siemens-Str. 23D
> 12277 Berlin
> Germany
> phone: +49 (30) 77 20 51 0
> fax  : +49 (30) 75 31 07 8
> ****************************
> 
> 
> > -----Original Message-----
> > From: owner-microblaze-uclinux@itee.uq.edu.au
> > [mailto:owner-microblaze-uclinux@itee.uq.edu.au] On Behalf Of sky tam
> > Sent: Tuesday, February 22, 2005 2:55 PM
> > To: microblaze-uclinux@itee.uq.edu.au
> > Subject: [microblaze-uclinux] I2C on uClinux
> >
> >
> > I am dealing with I2C control on uClinux. I would like to ask how can
> > I access SCL and SDA in C program in order to control a device. If
> > there any one has some C program examples that can be run on uclinux
> > to sccess I2C? thx
> >
> > SKY
> > ___________________________
> > microblaze-uclinux mailing list
> > microblaze-uclinux@itee.uq.edu.au
> > Project Home Page :
> > http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
> > Mailing List Archive :
> > http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
> >
> >
> >
> > --
> > This message has been scanned for viruses and
> > dangerous content by MailScanner, and is
> > believed to be clean.
> >
> >
> 
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
> 
> 
>
___________________________
microblaze-uclinux mailing list
microblaze-uclinux@itee.uq.edu.au
Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
Mailing List Archive : http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/