main.cpp

00001 #include "mbed.h"
00002 #include "main.h"
00003 #include "sx1272-hal.h"
00004 #include "debug.h"
00005 
00006 /* Set this flag to '1' to display debug messages on the console */
00007 #define DEBUG_MESSAGE   1
00008 
00009 
00010 #define RF_FREQUENCY                                868000000 // Hz
00011 #define TX_OUTPUT_POWER                             14        // 14 dBm
00012 
00013 #define LORA_BANDWIDTH                              2         // [0: 125 kHz,
00014 //  1: 250 kHz,
00015 //  2: 500 kHz,
00016 //  3: Reserved]
00017 
00018 #define LORA_SPREADING_FACTOR                       7         // [SF7..SF12]
00019 #define LORA_CODINGRATE                             1         // [1: 4/5,
00020 //  2: 4/6,
00021 //  3: 4/7,
00022 //  4: 4/8]
00023 
00024 #define LORA_PREAMBLE_LENGTH                        8
00025 #define LORA_SYMBOL_TIMEOUT                         5         // Symbols
00026 #define LORA_FIX_LENGTH_PAYLOAD_ON                  false
00027 #define LORA_FHSS_ENABLED                           false
00028 #define LORA_NB_SYMB_HOP                            4
00029 #define LORA_IQ_INVERSION_ON                        false
00030 #define LORA_CRC_ENABLED                            true
00031 
00032 #define BUFFER_SIZE                                 1024      // Define the payload size here
00033 
00034 DigitalOut led(LED1);
00035 
00036 /*!
00037  * Radio events function pointer
00038  */
00039 static RadioEvents_t RadioEvents;
00040 
00041 /*
00042  *  Global variables declarations
00043  */
00044 SX1272MB2xAS Radio( NULL );
00045 
00046 const uint8_t msg[] = "Temp=184.26 \r\nHumi=423.99 \r\n";
00047 
00048 uint16_t BufferSize = BUFFER_SIZE;
00049 uint8_t Buffer[BUFFER_SIZE];
00050 
00051 int16_t RssiValue = 0.0;
00052 int8_t SnrValue = 0.0;
00053 
00054 int msglen = 0;
00055 
00056 int main()
00057 {
00058     uint8_t i;
00059 
00060     debug( "\n\n\r     iGreenhouse Application - Transmitter\n\n\r" );
00061 
00062     // Initialize Radio driver
00063     RadioEvents.TxDone = OnTxDone;
00064     RadioEvents.TxTimeout = OnTxTimeout;
00065     Radio.Init( &RadioEvents );
00066 
00067     // verify the connection with the board
00068     while( Radio.Read( REG_VERSION ) == 0x00  ) {
00069         debug( "Radio could not be detected!\n\r", NULL );
00070         wait( 1 );
00071     }
00072 
00073     debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1272MB2XAS ) ) , "\n\r > Board Type: SX1272MB2xAS < \n\r" );
00074 
00075     Radio.SetChannel( RF_FREQUENCY );
00076 
00077 
00078     debug_if( LORA_FHSS_ENABLED, "\n\n\r             > LORA FHSS Mode < \n\n\r");
00079     debug_if( !LORA_FHSS_ENABLED, "\n\n\r             > LORA Mode < \n\n\r");
00080 
00081     Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
00082                        LORA_SPREADING_FACTOR, LORA_CODINGRATE,
00083                        LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
00084                        LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP,
00085                        LORA_IQ_INVERSION_ON, 2000000 );
00086 
00087     debug_if( DEBUG_MESSAGE, "Starting sending loop\r\n" );
00088 
00089     led = 0;
00090 
00091     while( 1 ) {
00092         debug("\r\n========\r\nSending a new Packet\r\n========\r\n");
00093         strcpy( ( char* )Buffer, ( char* ) msg );
00094         // We fill the buffer with numbers for the payload
00095         msglen = strlen((char *) msg);
00096         for( i = msglen; i < BufferSize; i++ ) {
00097             Buffer[i] = i - msglen;
00098         }
00099         wait_ms( 10 );
00100         Radio.Send( Buffer, BufferSize );
00101         
00102         led = 1-led;
00103         
00104         // Wait 3 seconds before resend a message
00105         wait(3);
00106     }
00107 }
00108 
00109 void OnTxDone( void )
00110 {
00111     Radio.Sleep( );
00112     debug_if( DEBUG_MESSAGE, "> OnTxDone\n\r" );
00113     debug_if( DEBUG_MESSAGE, "Message: %s \r\nLenght: %d \r\n", (char *) Buffer, msglen);
00114 }
00115 
00116 void OnTxTimeout( void )
00117 {
00118     Radio.Sleep( );
00119     debug_if( DEBUG_MESSAGE, "> OnTxTimeout\n\r" );
00120 }