177 lines
4.6 KiB
C
177 lines
4.6 KiB
C
/**** RFM 12 library for Atmel AVR Microcontrollers *******
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*
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* This software is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License,
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* or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA.
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*
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* @author Peter Fuhrmann, Hans-Gert Dahmen, Soeren Heisrath
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*/
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/******************************************************
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* *
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* C O N F I G U R A T I O N *
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* *
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******************************************************/
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/*
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Connect the RFM12 to the AVR as follows:
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RFM12 | AVR
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----------------+------------
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SDO | MISO
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nIRQ | INT0
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FSK/DATA/nFFS | VCC
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DCLK/CFIL/FFIT | -
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CLK | -
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nRES | -
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GND | GND
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ANT | -
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VDD | VCC
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GND | GND
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nINT/VDI | -
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SDI | MOSI
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SCK | SCK
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nSEL | Slave select pin defined below
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*/
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#include "../config.h"
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#include "../makros.h"
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#include <avr/interrupt.h>
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// don't ask...someone wanted to invent something more fancy than __AVR__ *sigh*
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#define __PLATFORM_AVR__
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//Pin that the RFM12's slave select is connected to
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//#define DDR_SS DDRB
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//#define PORT_SS PORTB
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//#define BIT_SS PB4
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#define DDR_SS DDR(PORT_SS)
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//SPI port
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//#define DDR_SPI DDRB
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#define DDR_SPI DDR(PORT_SPI)
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//#define PORT_SPI PORTB
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//#define PIN_SPI PINB
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//#define BIT_MOSI 5
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//#define BIT_MISO 6
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//#define BIT_SCK 7
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//#define BIT_SPI_SS 4
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//this is the hardware SS pin of the AVR - it
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//needs to be set to output for the spi-interface to work
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//correctly, independently of the CS pin used for the RFM12
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/************************
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* RFM12 CONFIGURATION OPTIONS
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*/
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//baseband of the module (either RFM12_BAND_433, RFM12_BAND_868 or RFM12_BAND_912)
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#define RFM12_BASEBAND RFM12_BAND_433
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//center frequency to use (+- FSK frequency shift)
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#define RFM12_FREQUENCY 433000000UL
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//FSK frequency shift in kHz
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#define FSK_SHIFT 45000
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//Receive RSSI Threshold
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#define RFM12_RSSI_THRESHOLD RFM12_RXCTRL_RSSI_79
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//Receive Filter Bandwidth
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#define RFM12_FILTER_BW RFM12_RXCTRL_BW_134
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//Output power relative to maximum (0dB is maximum)
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#define RFM12_POWER RFM12_TXCONF_POWER_0
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//Receive LNA gain
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#define RFM12_LNA_GAIN RFM12_RXCTRL_LNA_6
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//crystal load capacitance - the frequency can be verified by measuring the
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//clock output of RFM12 and comparing to 1MHz.
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//11.5pF seems to be o.k. for RFM12, and 10.5pF for RFM12BP, but this may vary.
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#define RFM12_XTAL_LOAD RFM12_XTAL_11_5PF
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//use this for datarates >= 2700 Baud
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#define DATARATE_VALUE RFM12_DATARATE_CALC_HIGH(9600.0)
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//use this for 340 Baud < datarate < 2700 Baud
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//#define DATARATE_VALUE RFM12_DATARATE_CALC_LOW(1200.0)
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//TX BUFFER SIZE
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#define RFM12_TX_BUFFER_SIZE 10
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//RX BUFFER SIZE (there are going to be 2 Buffers of this size for double_buffering)
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#define RFM12_RX_BUFFER_SIZE 10
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/************************
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* INTERRUPT VECTOR
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* set the name for the interrupt vector here
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*/
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//the interrupt vector
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#define RFM12_INT_VECT (INT0_vect)
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//the interrupt mask register
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#ifdef EIMSK
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#define RFM12_INT_MSK EIMSK
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#elif defined(GIMSK)
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#define RFM12_INT_MSK GIMSK
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#else
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#define RFM12_INT_MSK GICR
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#endif
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//the interrupt bit in the mask register
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#define RFM12_INT_BIT (INT0)
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//the interrupt flag register
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#ifdef EIFR
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#define RFM12_INT_FLAG EIFR
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#else
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#define RFM12_INT_FLAG GIFR
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#endif
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//the interrupt bit in the flag register
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#define RFM12_FLAG_BIT (INTF0)
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//setup the interrupt to trigger on negative edge
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#define RFM12_INT_SETUP() MCUCR |= (1 << ISC01)
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/************************
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* FEATURE CONFIGURATION
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*/
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#define RFM12_LOW_BATT_DETECTOR 0
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#define RFM12_USE_WAKEUP_TIMER 0
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#define RFM12_TRANSMIT_ONLY 0
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#define RFM12_SPI_SOFTWARE 0
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//setup the low battery detector to 2.2v
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//Vlb = 2.2 + (val * 0.1)
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//hint: minimum measured supply voltage is 1.98V !
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#define RFM12_LBD_VOLTAGE RFM12_LBD_VOLTAGE_2V2
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/**** UART DEBUGGING
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* en- or disable debugging via uart.
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*/
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#define RFM12_UART_DEBUG 0
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