/**** RFM 12 library for Atmel AVR Microcontrollers *******
 * 
 * This software is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 *
 * @author Peter Fuhrmann, Hans-Gert Dahmen, Soeren Heisrath
 */

/******************************************************
 *                                                    *
 *           C O N F I G U R A T I O N                *
 *                                                    *
 ******************************************************/

/*
	Connect the RFM12 to the AVR as follows:

	RFM12           | AVR
	----------------+------------
	SDO             | MISO
	nIRQ            | INT0
	FSK/DATA/nFFS   | VCC
	DCLK/CFIL/FFIT  |  -
	CLK             |  -
	nRES            |  -
	GND             | GND
	ANT             |  -
	VDD             | VCC
	GND             | GND
	nINT/VDI        | -
	SDI             | MOSI
	SCK             | SCK
	nSEL            | Slave select pin defined below
*/


#include "../config.h"
#include "../makros.h"

#include <avr/interrupt.h>

// don't ask...someone wanted to invent something more fancy than __AVR__ *sigh*
#define __PLATFORM_AVR__

//Pin that the RFM12's slave select is connected to
//#define DDR_SS DDRB
//#define PORT_SS PORTB
//#define BIT_SS PB4

#define DDR_SS DDR(PORT_SS)

//SPI port
//#define DDR_SPI DDRB

#define DDR_SPI DDR(PORT_SPI)

//#define PORT_SPI PORTB
//#define PIN_SPI PINB
//#define BIT_MOSI 5
//#define BIT_MISO 6
//#define BIT_SCK  7
//#define BIT_SPI_SS 4
//this is the hardware SS pin of the AVR - it 
//needs to be set to output for the spi-interface to work 
//correctly, independently of the CS pin used for the RFM12


/************************
 * RFM12 CONFIGURATION OPTIONS
 */

//baseband of the module (either RFM12_BAND_433, RFM12_BAND_868 or RFM12_BAND_912)
#define RFM12_BASEBAND RFM12_BAND_433

//center frequency to use (+- FSK frequency shift)
#define RFM12_FREQUENCY 433000000UL

//FSK frequency shift in kHz
#define FSK_SHIFT 45000

//Receive RSSI Threshold
#define RFM12_RSSI_THRESHOLD  RFM12_RXCTRL_RSSI_79

//Receive Filter Bandwidth
#define RFM12_FILTER_BW       RFM12_RXCTRL_BW_134

//Output power relative to maximum (0dB is maximum)
#define RFM12_POWER           RFM12_TXCONF_POWER_0

//Receive LNA gain
#define RFM12_LNA_GAIN        RFM12_RXCTRL_LNA_6

//crystal load capacitance - the frequency can be verified by measuring the
//clock output of RFM12 and comparing to 1MHz.
//11.5pF seems to be o.k. for RFM12, and 10.5pF for RFM12BP, but this may vary.
#define RFM12_XTAL_LOAD RFM12_XTAL_11_5PF

//use this for datarates >= 2700 Baud
#define DATARATE_VALUE RFM12_DATARATE_CALC_HIGH(9600.0)

//use this for 340 Baud < datarate < 2700 Baud
//#define DATARATE_VALUE RFM12_DATARATE_CALC_LOW(1200.0)

//TX BUFFER SIZE
#define RFM12_TX_BUFFER_SIZE 10

//RX BUFFER SIZE (there are going to be 2 Buffers of this size for double_buffering)
#define RFM12_RX_BUFFER_SIZE 10


/************************
 * INTERRUPT VECTOR
 * set the name for the interrupt vector here
 */
 
//the interrupt vector
#define RFM12_INT_VECT (INT0_vect)

//the interrupt mask register
#ifdef EIMSK
  #define RFM12_INT_MSK EIMSK
#elif defined(GIMSK)
  #define RFM12_INT_MSK GIMSK
#else
  #define RFM12_INT_MSK GICR
#endif

//the interrupt bit in the mask register
#define RFM12_INT_BIT (INT0)

//the interrupt flag register
#ifdef EIFR
  #define RFM12_INT_FLAG EIFR
#else
  #define RFM12_INT_FLAG GIFR
#endif

//the interrupt bit in the flag register
#define RFM12_FLAG_BIT (INTF0)

//setup the interrupt to trigger on negative edge
#define RFM12_INT_SETUP()   MCUCR |= (1 << ISC01)


/************************
 * FEATURE CONFIGURATION
 */
 
#define RFM12_LOW_BATT_DETECTOR 0
#define RFM12_USE_WAKEUP_TIMER 0
#define RFM12_TRANSMIT_ONLY 0
#define RFM12_SPI_SOFTWARE 0

//setup the low battery detector to 2.2v
//Vlb = 2.2 + (val * 0.1)
//hint: minimum measured supply voltage is 1.98V !
	
#define RFM12_LBD_VOLTAGE             RFM12_LBD_VOLTAGE_2V2


/**** UART DEBUGGING
 * en- or disable debugging via uart.
 */
#define RFM12_UART_DEBUG 0