Re: [Gumstix-users] some i2c questions...

[Chris D. <cg...@co...>]

On 12/4/06, Ian Smith <it...@cs...> wrote:
> well what im looking at what maxim calls the write cycle, where you send
> a start bit, then 7 bits for the address, 1 bit to signal a write. after
> that the chip acknowledges for one bit, then you send a control byte,
> another acknowledge, followed by sending a final stop bit. so i guess i
> would pad the first send of 9 bits with 7 0's right?

Ian,

With the Linux I2C implementation, you don't have to worry about these
details.  One ioctl() sets the device address that all of your
write()s go to -- just pass in what you want in the data payload of
the packet, and the addressing and whatnot is handled for you.

best,
-chris