* The RF24 driver can be build as a static library with Atmel Studio 7 in order to be included as any other library in another program for the XMEGA family.
*
* Currently only the </b>ATXMEGA256D3</b> is implemented.
*
* @section Preparation
*
* Create an empty GCC Static Library project in AS7.<br>
* As not all files are required, copy the following directory structure in the project:
*
* @code
* utility\
* ATXMega256D3\
* compatibility.c
* compatibility.h
* gpio.cpp
* gpio.h
* gpio_helper.c
* gpio_helper.h
* includes.h
* RF24_arch_config.h
* spi.cpp
* spi.h
* nRF24L01.h
* printf.h
* RF24.cpp
* RF24.h
* RF24_config.h
* @endcode
*
* @section Usage
*
* Add the library to your project!</br>
* In the file where the **main()** is put the following in order to update the millisecond functionality:
*
* @code
* ISR(TCE0_OVF_vect)
* {
* update_milisec();
* }
* @endcode
*
* Declare the rf24 radio with **RF24 radio(XMEGA_PORTC_PIN3, XMEGA_SPI_PORT_C);**
*
* First parameter is the CE pin which can be any available pin on the uC.
*
* Second parameter is the CS which can be on port C (**XMEGA_SPI_PORT_C**) or on port D (**XMEGA_SPI_PORT_D**).
*
* Call the **__start_timer()** to start the millisecond timer.
*
* @note Note about the millisecond functionality:<br>
*
* The millisecond functionality is based on the TCE0 so don't use these pins as IO.<br>
* The operating frequency of the uC is 32MHz. If you have other frequency change the TCE0 registers appropriatly in function **__start_timer()** in **compatibility.c** file for your frequency.
