ATXMEGA

Table of Contents

• Preparation
• Usage

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 Atmel Studio 7.

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

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:

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.

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.