Information regarding SPI

HI everybody.

I want some information over "programming in LINUX".
I also wanted to know more about SPI and programming using SPI as interface protocol.
Any example using SPI are also welcome to be mentioned.

read wiki
http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus

SPI is easy to implement as compared to I2C. Try it

Programming Hints:
1. Data to be sampled at rising edge of clock
2. Data shifted as MSB to LSB i.e. MSB first.

Hi Ajay .

I agree that SPI is easier to implement when compared to I2C. But i would like to know if there is any specific difference in using these protocols i.e SPI, I2C, CAN etc....

Well now the first doubt is that : Do we have to use these protocols as specified by the Manufacturer of the Micro controller/processor or is it upto the user to implement it?

Secondly , I would be glad if you can help me in giving information about programming in Linux.

Regarding your doubt, So you should understand that word protocol means a standard defined for communication or data transfer between two peripherals. So SPI will be same for all the devices, it doesn't change for anyone or peripheral to peripheral. So while implement any protocol you have to follow its standards.
There are many things that counts in standard, like Voltage levels, data transfer rate, how data is to be transfered etc. So keep these things in mind while implementing protocols.
and regarding linux, I donno much about linux programming :-|