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Update ATtinyLoRa.cpp #2

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153 changes: 118 additions & 35 deletions ATtinyLoRa.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -16,12 +16,72 @@
******************************************************************************************/
#include "ATtinyLoRa.h"
#include <tinySPI.h> //ATtiny85
//#include <SPI.h> // ATmega328p
//#include <SPI.h> // ATmega328p

extern uint8_t NwkSkey[16];
extern uint8_t AppSkey[16];
extern uint8_t DevAddr[4];

/*
*****************************************************************************************
* Description: TTN regional frequency plans
*****************************************************************************************
*/

#ifdef AU915
static const unsigned char PROGMEM TinyLoRa::LoRa_Frequency[8][3] = {
{ 0xE5, 0x33, 0x5A }, //Channel 0 916.800 MHz / 61.035 Hz = 15020890 = 0xE5335A
{ 0xE5, 0x40, 0x26 }, //Channel 2 917.000 MHz / 61.035 Hz = 15024166 = 0xE54026
{ 0xE5, 0x4C, 0xF3 }, //Channel 3 917.200 MHz / 61.035 Hz = 15027443 = 0xE54CF3
{ 0xE5, 0x59, 0xC0 }, //Channel 4 917.400 MHz / 61.035 Hz = 15030720 = 0xE559C0
{ 0xE5, 0x66, 0x8D }, //Channel 5 917.600 MHz / 61.035 Hz = 15033997 = 0xE5668D
{ 0xE5, 0x73, 0x5A }, //Channel 6 917.800 MHz / 61.035 Hz = 15037274 = 0xE5735A
{ 0xE5, 0x80, 0x27 }, //Channel 7 918.000 MHz / 61.035 Hz = 15040551 = 0xE58027
{ 0xE5, 0x8C, 0xF3 } //Channel 8 918.200 MHz / 61.035 Hz = 15043827 = 0xE58CF3
};
#endif

#ifdef EU863
static const unsigned char PROGMEM TinyLoRa::LoRa_Frequency[8][3] = {
{ 0xD9, 0x06, 0x8B }, //Channel 0 868.100 MHz / 61.035 Hz = 14222987 = 0xD9068B
{ 0xD9, 0x13, 0x58 }, //Channel 1 868.300 MHz / 61.035 Hz = 14226264 = 0xD91358
{ 0xD9, 0x20, 0x24 }, //Channel 2 868.500 MHz / 61.035 Hz = 14229540 = 0xD92024
{ 0xD8, 0xC6, 0x8B }, //Channel 3 867.100 MHz / 61.035 Hz = 14206603 = 0xD8C68B
{ 0xD8, 0xD3, 0x58 }, //Channel 4 867.300 MHz / 61.035 Hz = 14209880 = 0xD8D358
{ 0xD8, 0xE0, 0x24 }, //Channel 5 867.500 MHz / 61.035 Hz = 14213156 = 0xD8E024
{ 0xD8, 0xEC, 0xF1 }, //Channel 6 867.700 MHz / 61.035 Hz = 14216433 = 0xD8ECF1
{ 0xD8, 0xF9, 0xBE } //Channel 7 867.900 MHz / 61.035 Hz = 14219710 = 0xD8F9BE

};
#endif

#ifdef US902
static const unsigned char PROGMEM TinyLoRa::LoRa_Frequency[8][3] = {
{ 0xE1, 0xF9, 0xC0 }, //Channel 0 903.900 MHz / 61.035 Hz = 14809536 = 0xE1F9C0
{ 0xE2, 0x06, 0x8C }, //Channel 1 904.100 MHz / 61.035 Hz = 14812812 = 0xE2068C
{ 0xE2, 0x13, 0x59}, //Channel 2 904.300 MHz / 61.035 Hz = 14816089 = 0xE21359
{ 0xE2, 0x20, 0x26 }, //Channel 3 904.500 MHz / 61.035 Hz = 14819366 = 0xE22026
{ 0xE2, 0x2C, 0xF3 }, //Channel 4 904.700 MHz / 61.035 Hz = 14822643 = 0xE22CF3
{ 0xE2, 0x39, 0xC0 }, //Channel 5 904.900 MHz / 61.035 Hz = 14825920 = 0xE239C0
{ 0xE2, 0x46, 0x8C }, //Channel 6 905.100 MHz / 61.035 Hz = 14829196 = 0xE2468C
{ 0xE2, 0x53, 0x59 } //Channel 7 905.300 MHz / 61.035 Hz = 14832473 = 0xE25359
};
#endif

#ifdef AS920
static const unsigned char PROGMEM TinyLoRa::LoRa_Frequency[8][3] = {
{ 0xE6, 0xCC, 0xF4 }, //Channel 0 868.100 MHz / 61.035 Hz = 15125748 = 0xE6CCF4
{ 0xE6, 0xD9, 0xC0 }, //Channel 1 868.300 MHz / 61.035 Hz = 15129024 = 0xE6D9C0
{ 0xE6, 0x8C, 0xF3 }, //Channel 2 868.500 MHz / 61.035 Hz = 15109363 = 0xE68CF3
{ 0xE6, 0x99, 0xC0 }, //Channel 3 867.100 MHz / 61.035 Hz = 15112640 = 0xE699C0
{ 0xE6, 0xA6, 0x8D }, //Channel 4 867.300 MHz / 61.035 Hz = 15115917 = 0xE6A68D
{ 0xE6, 0xB3, 0x5A }, //Channel 5 867.500 MHz / 61.035 Hz = 15119194 = 0xE6B35A
{ 0xE6, 0xC0, 0x27 }, //Channel 6 867.700 MHz / 61.035 Hz = 15122471 = 0xE6C027
{ 0xE6, 0x80, 0x27 } //Channel 7 867.900 MHz / 61.035 Hz = 15106087 = 0xE68027
};
#endif


/*
*****************************************************************************************
* Description: S_Table used for AES encription
Expand Down Expand Up @@ -90,6 +150,9 @@ void TinyLoRa::begin()
// init frame counter
uint16_t frameCounter = 0x0000;

// init tx random number for first use
uint8_t txrandomNum = 0x00;

}
/*
*****************************************************************************************
Expand All @@ -113,39 +176,53 @@ void TinyLoRa::RFM_Send_Package(unsigned char *RFM_Tx_Package, unsigned char Pac
RFM_Write(0x40,0x40);

// change the channel of the RFM module
switch (randomNum) {
case 0x00: //Channel 0 868.100 MHz / 61.035 Hz = 14222987 = 0xD9068B
RFM_Write(0x06,0xD9);
RFM_Write(0x07,0x06);
RFM_Write(0x08,0x8B);
break;
case 0x01: //Channel 1 868.300 MHz / 61.035 Hz = 14226264 = 0xD91358
RFM_Write(0x06,0xD9);
RFM_Write(0x07,0x13);
RFM_Write(0x08,0x58);
break;
case 0x02: //Channel 2 868.500 MHz / 61.035 Hz = 14229540 = 0xD92024
RFM_Write(0x06,0xD9);
RFM_Write(0x07,0x20);
RFM_Write(0x08,0x24);
break;
case 0x03: //Channel 3 867.100 MHz / 61.035 Hz = 14206603 = 0xD8C68B
RFM_Write(0x06,0xD8);
RFM_Write(0x07,0xC6);
RFM_Write(0x08,0x8B);
break;
}
/*
//SF7 BW 250kHz
RFM_Write(0x1E,0x74); //SF7 CRC On
RFM_Write(0x1D,0x82); //250 kHz 4/5 coding rate explicit header mode
RFM_Write(0x26,0x04); //Low datarate optimization off AGC auto on
*/
//SF10 BW 125 kHz
RFM_Write(0x1E,0xA4); //SF10 CRC On
RFM_Write(0x1D,0x72); //125 kHz 4/5 coding rate explicit header mode
RFM_Write(0x26,0x04); //Low datarate optimization off AGC auto on


RFM_Write(0x06, pgm_read_byte(&(LoRa_Frequency[randomNum][0])));
RFM_Write(0x07, pgm_read_byte(&(LoRa_Frequency[randomNum][1])));
RFM_Write(0x08, pgm_read_byte(&(LoRa_Frequency[randomNum][2])));

#ifdef SF12BW125 //SF12 BW 125 kHz
RFM_Write(0x1E,0xC4); //SF12 CRC On
RFM_Write(0x1D,0x72); //125 kHz 4/5 coding rate explicit header mode
RFM_Write(0x26,0x0C); //Low datarate optimization on AGC auto on
#endif

#ifdef SF11BW125 //SF11 BW 125 kHz
RFM_Write(0x1E,0xB4); //SF11 CRC On
RFM_Write(0x1D,0x72); //125 kHz 4/5 coding rate explicit header mode
RFM_Write(0x26,0x0C); //Low datarate optimization on AGC auto on
#endif

#ifdef SF10BW125 //SF10 BW 125 kHz
RFM_Write(0x1E,0xA4); //SF10 CRC On
RFM_Write(0x1D,0x72); //125 kHz 4/5 coding rate explicit header mode
RFM_Write(0x26,0x04); //Low datarate optimization off AGC auto on
#endif

#ifdef SF9BW125 //SF9 BW 125 kHz
RFM_Write(0x1E,0x94); //SF9 CRC On
RFM_Write(0x1D,0x72); //125 kHz 4/5 coding rate explicit header mode
RFM_Write(0x26,0x04); //Low datarate optimization off AGC auto on
#endif

#ifdef SF8BW125 //SF8 BW 125 kHz
RFM_Write(0x1E,0x84); //SF8 CRC On
RFM_Write(0x1D,0x72); //125 kHz 4/5 coding rate explicit header mode
RFM_Write(0x26,0x04); //Low datarate optimization off AGC auto on
#endif

#ifdef SF7BW125 //SF7 BW 125 kHz
RFM_Write(0x1E,0x74); //SF7 CRC On
RFM_Write(0x1D,0x72); //125 kHz 4/5 coding rate explicit header mode
RFM_Write(0x26,0x04); //Low datarate optimization off AGC auto on
#endif

#ifdef SF7BW250 //SF7 BW 250kHz
RFM_Write(0x1E,0x74); //SF7 CRC On
RFM_Write(0x1D,0x82); //250 kHz 4/5 coding rate explicit header mode
RFM_Write(0x26,0x04); //Low datarate optimization off AGC auto on
#endif

//Set payload length to the right length
RFM_Write(0x22,Package_Length);

Expand All @@ -170,6 +247,7 @@ void TinyLoRa::RFM_Send_Package(unsigned char *RFM_Tx_Package, unsigned char Pac
//Switch RFM to sleep
RFM_Write(0x01,0x00);
}

/*
*****************************************************************************************
* Description : Funtion that writes a register from the RFM
Expand Down Expand Up @@ -512,7 +590,12 @@ void TinyLoRa::Calculate_MIC(unsigned char *Data, unsigned char *Final_MIC, unsi
Final_MIC[2] = New_Data[2];
Final_MIC[3] = New_Data[3];

randomNum = Final_MIC[3] & 0x03;
// Generate a random number between 0 and 7 to select next transmit channel
randomNum = Final_MIC[3] & 0x07;

// Generate a random number between 0 and 7 to randomise next transmit message schedule
txrandomNum = Final_MIC[2] & 0x07;

}
/*
*****************************************************************************************
Expand Down