Sorry, I can’t. Don’t have it. You should be able to translate it from the Arduino code, or code it using the Arduino and compile it and pick up the AVR code in one of the output directories that the Arduino SDK uses. The Arduino ultimately produces code that will run on an Atmega, so it should go into the standard AVR kits.

You may need to retreat into the specification sheet for the LIS302DL and level-up a bit on the technology. Many of these devices handle a number of communications protocols — I2C/TWI, SPI, Three-Wire. You choose which one you want to use — I generally go for TWI, aka Two-Wire/I2C, because it only uses two wires, and the Arduino and other ATMega’s can handle it out-of-the-box. The confusion can come in because the accelerometer (and other devices) use the same pin, but the spec sheets refer to it by a different name.

If you look at the LIS302DL specification sheet (http://www.st.com/stonline/products/literature/ds/12726.pdf) on the pin description table, you can see that pins 12, 13 and 14 are the ones you need to consider. For TWI, pin 13 is for the serial data (SDA, as its referred to) and pin 14 is for the serial clock (SCL). The way the protocol works is to first send the register address, bitwise as serial data, across SDA using SCL to clock it in, and then send the actual data to be written over SDA, again clocking using SCL. Conversely, if you’re reading data, you send the register address, then listen for the data that represents the data of that register as it clocks out over SDA.

SDA and SCL are the main communications lines for the TWI (Two-Wire Interface, aka I2C). SDA handles the addressing to the device in a serial fashion, and also the data sent or received. SCL is for clocking the data either way. The protocol is straightforward once you unpack how it works, which isn’t too hard. But, you’ll need to poke around in the specification sheet (for both the LIS302DL _and_ the ATMega328 to understand the protocol and how to get the accelerometer properly connected to the microcontroller.)

Here are some posts I did that may help:

http://www.nearfuturelaboratory.com/2008/05/29/logical-analysis/
http://www.nearfuturelaboratory.com/2007/01/11/arduino-and-twi/
http://www.nearfuturelaboratory.com/2008/06/21/logicport-overview/

I am really new to all of this and i am have so hard time figuring out how to do the wiring. i.e how to connect the LIS302DL to my Arduino ATMEGA328. On my LIS302DL I have Vcc, GND, MISI, MISO, CS, I2, and I2. Don’t laugh at me but I really do not know the meanings of all f the except for Vcc and GND. Looking around, many people mention SDA, SDO which I cannot see on the LIS302DL and I am doing a project for a class and I really need your help guys. I really appreciate if you tell how to do that step by step. Programming wise I have absolutely no problems since I am really good at it but connecting stuff.. that’s I am learning now.

Thanks so much in advance

I’m not sure what you mean? You want a sample of data? What data precisely? The I2C data stream?

What’s a piccolo.h file? What’s piccolo, anyway??