Re: [Gumstix-users] Gumstix as I2C slave

[jbchong <jb...@gm...>]

Karel and Brian,

Did you ever manage to get slave receive working and if so, is there any
place where this code is available?

Thanks,
Justin



Brian Davidson wrote:
> 
> I've got some code I can send you, with some caveats:
> - it's not using the stock i2c driver for the pxa
> - it only supports slave receive (I didn't have a need for slave  
> transmit)
> - there's another driver that adds another device file that does  
> master transmit and slave receive
> - it hasn't been tested on the Verdex yet (I've ordered one, but  
> don't have it yet)
> - it requires a very minor modification to the i2c subsystem on newer  
> kernels
>      - extern int i2c_slave_send(struct i2c_client *,char*,int); was  
> removed
>      - extern int i2c_slave_recv(struct i2c_client *,char*,int);) was  
> removed
> 
> 
> They've changed the PXA driver several times since I've been using  
> the Gumstix.  The last one I looked at implements a "serial EEPROM  
> emulator" in the driver.  The emulator runs in kernel space.  My  
> driver lets you run your code in userland.
> 
> Brian
> 
> On Nov 9, 2007, at 5:44 PM, Charles II wrote:
> 
>> Hi,
>> please could anyone tell me where could I find any demo how to use  
>> Gumstix Verdex as I2C slave?
>> Now I know how to use it as I2C master, thanks to small tutorial  
>> and i2c program on Gumstix Wiki http://docwiki.gumstix.org/I2c
>>
>> I'm newbie in Linux and I really need help with I2C slave.
>>
>> Thanks,
>> Karel
>>
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