ATXMEGA¶

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 family is implemented.

Preparation¶

Create an empty GCC Static Library project in AS7.

As not all files are required, copy the following directory structure in the project:

┌nRF24L01.h
├printf.h
├RF24.cpp
├RF24.h
├RF24_config.h
└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

Usage¶

Add the library to your project!

In the file where the main() is located, put the following code snippet to update the millisecond functionality:

ISR(TCE0_OVF_vect)
{
    update_milisec();
}

Declare the RF24Revamped radio with

RF24Revamped 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:

The millisecond functionality is based on the TCE0 so don’t use these pins as IO.

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.