beaglebone-at86rf233

Simple BeagleBoneBlack driver for the AT86RF233 IEEE802.15.4 radio module

This is a C port of the AT86RF233 driver from RIOT-OS and arduino-at86rf233

Radio Hardware

This software is designed to be used with ATMEL's AT86RF233 IEEE802.15.4 radio, available as a $30USB radio extension board (REB).

Connect the AT86RF233 to the BeagleBoneBlack

In this example, we will be using a BeagleBoneBlack.

Here's the wiring setup.

BBB Extension Board | (AT86RF2xx)

GPIO_60 (12) --- 7 PWM(+) | (8 RSTN)

SPIO_CSO (17) --- 15 SPI_SS_A | (23 SEL)

SPIO_D1 (18) --- 16 SPI_MOSI | (22 MOSI)

SPIO_DO (21) --- 17 SPI_MISO | (20 MISO)

SPIO_SLCK (22) --- 18 SPI_SCK | (19 SCLK)

GND --- 10 | (11 SLP_TR)

TODO (experimental):

GPIO_48 (15) --- 9 IRQ/GPIO | (24 IRQ)

GPIO_49 (23) --- 10 | (11 SLP_TR)

Pinout of the BBB can be found in lect/beaglebone-black-pinout.jpg

Instalation

You must run periph/scripts/install.sh as superuser. This will enable access to the SPI pins on the BBB via userspace. Note that it also adds a bootstrap script to your crontab to enable a spi device on /dev/spi*:

sudo su
chmod a+x periph/scripts/install.sh
./periph/scripts/install.sh

Testing

What could fail is SPI setup due to OS updates. To test run tests/coms/com_read

If SPI is working the output should be:

Should be b (reset value), outputing: **b**

If not:

Should be b (reset value), outputing: **0**

Driver Configuration

Without further configuration, this library will use the default AT86RF2xx parameters contained in at86rf2xx-defaults.h. Most radio parameters can be updated manually by using the set/getters enumerated in at86rf2xx-getset.c. For example, to change the radio channel to 25, simply call set_chan(25) on the at86rf2xx device after initialization:

	at86rf2xx.init(SEL_CS, IRQ_GPIO, SLP_TR_GPIO, RESET_PIN);
	at86rf2xx.set_chan(CHANNEL); // set channel

Important notes:

SEL_CS is not configurable. You must use pin 17 on the BBB.