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# ATXMEGA
@tableofcontents
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 [ATXMEGA D3](https://www.microchip.com/wwwproducts/en/ATxmega64d3) family is implemented.
## Preparation
Create an empty GCC Static Library project in Atmel Studio 7.
As not all files are required, copy the following directory structure in the project:
```text
utility\
ATXMegaD3\
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
```
## Usage
Add the library to your project!
In the file where the `main()` is put the following in order to update the millisecond functionality:
```cpp
ISR(TCE0_OVF_vect)
{
update_milisec();
}
```
Declare the rf24 radio with `RF24 radio(XMEGA_PORTC_PIN3, XMEGA_SPI_PORT_C);`
1. First parameter is the CE pin which can be any available pin on the microcontroller.
2. 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 The millisecond functionality is based on the TCE0 so don't use these pins as IO.
@note The operating frequency of the uC is 32MHz. If you have a different frequency, change the TCE0 registers appropriately in function `__start_timer()` in **compatibility.c** file for your frequency.
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