Microduino CoreRF

Support for the Microduino CoreRF board. More...

Detailed Description

Support for the Microduino CoreRF board.

Hardware

Pinout

corerf-pinout
Warning
Unlike on other ATmega MCUs, the GPIOs are not 5V tolerant.
Note
The 5V pin cannot be used to power the board, as the board is not equipped with an voltage regulator. The pin is therefore not connected. But it can be used to pass 5V to shields, if connected to a 5V supply voltage.

Board

The board is just a breakout for the ATmega128RFA1 MCU.

MCU Details

MCU ATmega128RFA1
Family ATmega
Vendor Atmel
Package QFN/MLF
SRAM 16KiB
Flash 128KiB
EEPROM 4KiB
Core Frequency 8MHz (16MHz no power save mode)
Oscillators 32.768 kHz & 16 MHz
Timer 6 ( 2x8bit & 4x16bit )
Analog Comparator 1
ADCs 1x 15 channel 6 to 12-bit
USARTs 2
SPIs 3 (1 SPI & 2 USART SPI)
I2Cs 1 (called TWI)
Vcc 1.8V - 3.6V
Datasheet / Reference Manual Datasheet and Reference Manual
Board Manual Wiki Page

The MCU comes with a 2.4 GHz IEEE 802.15.4 radio that is compatible with the Atmel AT86RF23x line of transceivers with the only difference being that it is not being accessed over an SPI bus, but instead the radio registers are directly mapped into memory.

Flashing RIOT

Flashing RIOT on the CoreRF is done using the SPI method. Using a cheap FT232H breakout board, connect the board as follows:

FT232H Microduino CoreRF
D0 D13 (SCK)
D1 D11 (MOSI)
D2 D12 (MISO)
D3 RST (Reset)
3.3V 3.3V
GND GND

Now you can simply type

make flash BOARD=microduino-corerf

This should take care of everything!

You will need a separate adapter for UART:

FT232R Microduino CoreRF
TX D0
RX D1

Troubleshooting

Using the external crystal oscillator (Transceiver Crystal Oscillator) and deep sleep

When the external crystal oscillator is used as system clock and the device is put into deep sleep mode it seems that the clocks for all peripherals are enabled and set to the smallest divider (highest frequency). This leads to a higher power consumption. When the device should be put into deep sleep it is recommended to use the internal RC oscillator as system clock source.

Pin Change Interrupts

More pins can be used for hardware interrupts using the Pin Change Interrupt feature. See ATmega common for details.

Files

file  board.h
 Board specific definitions for the Microduino CoreRF board.
 
file  periph_conf.h
 Peripheral MCU configuration for the Microduino CoreRF board.