main.cpp

00001 #include "mbed.h"
00002 #include "main.h"
00003 #include "sx1276-hal.h"
00004 #include "WakeUp.h"
00005 //#include "debug.h"
00006 
00007 /* Set this flag to '1' to display debug messages on the console */
00008 #define DEBUG_MESSAGE   1
00009 
00010 /* Set this flag to '1' to use the LoRa modulation or to '0' to use FSK modulation */
00011 #define USE_MODEM_LORA  1
00012 #define USE_MODEM_FSK   !USE_MODEM_LORA
00013 
00014 #define RF_FREQUENCY                               471900000 // Hz
00015 #define TX_OUTPUT_POWER                            20        // 14 dBm
00016 
00017 #if USE_MODEM_LORA == 1
00018 
00019 #define LORA_BANDWIDTH                              1         // [0: 125 kHz,
00020 //  1: 250 kHz,
00021 //  2: 500 kHz,
00022 //  3: Reserved]
00023 #define LORA_SPREADING_FACTOR                      12         // [SF7..SF12]
00024 #define LORA_CODINGRATE                             1         // [1: 4/5,
00025 //  2: 4/6,
00026 //  3: 4/7,
00027 //  4: 4/8]
00028 #define LORA_PREAMBLE_LENGTH                        8         // Same for Tx and Rx
00029 #define LORA_SYMBOL_TIMEOUT                         5         // Symbols
00030 #define LORA_FIX_LENGTH_PAYLOAD_ON                  false
00031 #define LORA_FHSS_ENABLED                           false
00032 #define LORA_NB_SYMB_HOP                            4
00033 #define LORA_IQ_INVERSION_ON                        false
00034 #define LORA_CRC_ENABLED                            true
00035 
00036 #elif USE_MODEM_FSK == 1
00037 
00038 #define FSK_FDEV                                    25000     // HzY
00039 #define FSK_DATARATE                                19200     // bps
00040 #define FSK_BANDWIDTH                               50000     // Hz
00041 #define FSK_AFC_BANDWIDTH                           83333     // Hz
00042 #define FSK_PREAMBLE_LENGTH                         5         // Same for Tx and Rx
00043 #define FSK_FIX_LENGTH_PAYLOAD_ON                   false
00044 #define FSK_CRC_ENABLED                             true
00045 
00046 #else
00047 #error "Please define a modem in the compiler options."
00048 #endif
00049 
00050 #define RX_TIMEOUT_VALUE                                3000000   // in us
00051 #define BUFFER_SIZE                                     32        // Define the payload size here
00052 
00053 #if( defined ( TARGET_KL25Z ) || defined ( TARGET_LPC11U6X ) )
00054 DigitalOut led(LED2);
00055 #else
00056 DigitalOut led(LED1);
00057 #endif
00058 DigitalOut TXIO(PA_1);
00059 /*
00060  *  Global variables declarations
00061  */
00062 typedef enum {
00063     LOWPOWER = 0,
00064     IDLE,
00065 
00066     RX,
00067     RX_TIMEOUT,
00068     RX_ERROR,
00069 
00070     TX,
00071     TX_TIMEOUT,
00072 
00073     CAD,
00074     CAD_DONE
00075     
00076 } AppStates_t;
00077 
00078 volatile AppStates_t State = LOWPOWER;
00079 
00080 /*!
00081  * Radio events function pointer
00082  */
00083 static RadioEvents_t RadioEvents;
00084 
00085 /*
00086  *  Global variables declarations
00087  */
00088 SX1276MB1xAS Radio( NULL );
00089 
00090 const uint8_t PingMsg[] = "PING";
00091 const uint8_t PongMsg[] = "PONG";
00092 
00093 uint16_t BufferSize = BUFFER_SIZE;
00094 uint8_t Buffer[BUFFER_SIZE];
00095 int16_t RssiValue = 0.0;
00096 int8_t SnrValue = 0.0;
00097 Serial pc(PB_6, PB_7);
00098 void srprintf(uint8_t *load,uint8_t size)
00099 {
00100     pc.printf(":");
00101     for(int i=0; i<size; i++) {
00102         pc.printf("%x ",load[i]);
00103     }
00104   //  pc.printf("size:%drssi:%dsnr:%d\r\n",size,rssi,snr);
00105 }
00106 int main()
00107 {
00108     uint8_t i;
00109     bool isMaster = true;
00110     pc.printf("Hello World !\n");
00111     //debug( "\n\n\r     SX1276 Ping Pong Demo Application \n\n\r" );
00112     // Initialize Radio driver
00113     RadioEvents.TxDone = OnTxDone;
00114     RadioEvents.RxDone = OnRxDone;
00115     RadioEvents.RxError = OnRxError;
00116     RadioEvents.TxTimeout = OnTxTimeout;
00117     RadioEvents.RxTimeout = OnRxTimeout;
00118     Radio.Init( &RadioEvents );
00119 
00120     // verify the connection with the board
00121     while( Radio.Read( REG_VERSION ) == 0x00  ) {
00122         // debug( "Radio could not be detected!\n\r", NULL );
00123         pc.printf(".");
00124         wait( 1 );
00125     }
00126     TXIO = 1;
00127     //  debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1276MB1LAS ) ) , "\n\r > Board Type: SX1276MB1LAS < \n\r" );
00128     // debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1276MB1MAS ) ) , "\n\r > Board Type: SX1276MB1MAS < \n\r" );
00129 
00130     Radio.SetChannel( RF_FREQUENCY );
00131     pc.printf("VERSION:%x\r\n",Radio.Read( REG_FRFMSB ));
00132     pc.printf("VERSION:%x\r\n",Radio.Read( REG_FRFMID ));
00133 #if USE_MODEM_LORA == 1
00134 
00135 //    debug_if( LORA_FHSS_ENABLED, "\n\n\r             > LORA FHSS Mode < \n\n\r");
00136 //   debug_if( !LORA_FHSS_ENABLED, "\n\n\r             > LORA Mode < \n\n\r");
00137 
00138     Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
00139                        LORA_SPREADING_FACTOR, LORA_CODINGRATE,
00140                        LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
00141                        LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP,
00142                        LORA_IQ_INVERSION_ON, 2000000 );
00143 
00144     Radio.SetRxConfig( MODEM_LORA, LORA_BANDWIDTH, LORA_SPREADING_FACTOR,
00145                        LORA_CODINGRATE, 0, LORA_PREAMBLE_LENGTH,
00146                        LORA_SYMBOL_TIMEOUT, LORA_FIX_LENGTH_PAYLOAD_ON, 0,
00147                        LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP,
00148                        LORA_IQ_INVERSION_ON, true );
00149 
00150 #elif USE_MODEM_FSK == 1
00151 
00152 //   debug("\n\n\r              > FSK Mode < \n\n\r");
00153     Radio.SetTxConfig( MODEM_FSK, TX_OUTPUT_POWER, FSK_FDEV, 0,
00154                        FSK_DATARATE, 0,
00155                        FSK_PREAMBLE_LENGTH, FSK_FIX_LENGTH_PAYLOAD_ON,
00156                        FSK_CRC_ENABLED, 0, 0, 0, 2000000 );
00157 
00158     Radio.SetRxConfig( MODEM_FSK, FSK_BANDWIDTH, FSK_DATARATE,
00159                        0, FSK_AFC_BANDWIDTH, FSK_PREAMBLE_LENGTH,
00160                        0, FSK_FIX_LENGTH_PAYLOAD_ON, 0, FSK_CRC_ENABLED,
00161                        0, 0, false, false );
00162 
00163 #else
00164 
00165 #error "Please define a modem in the compiler options."
00166 
00167 #endif
00168 
00169     pc.printf("VERSION:%x\r\n",Radio.Read( REG_LR_MODEMCONFIG1 ));
00170     pc.printf("VERSION:%x\r\n",Radio.Read( REG_LR_MODEMCONFIG2 ));
00171     //  debug_if( DEBUG_MESSAGE, "Starting Ping-Pong loop\r\n" );
00172 
00173     led = 0;
00174  //   WakeUp::calibrate();
00175     Radio.Rx( RX_TIMEOUT_VALUE );
00176     while( 0 ) {
00177  //       WakeUp::set_ms(6000);
00178  //       deepsleep();
00179         switch( State ) {
00180             case RX:
00181                 //     debugs((char* )Buffer,sizeof(Buffer));
00182                 //      debug( "rssi:%d dbm\r\n",Radio.GetRssi( MODEM_LORA ));
00183                 //      debug( "\r\n" );
00184                 if( isMaster == true ) {
00185                     if( BufferSize > 0 ) {
00186                         if( strncmp( ( const char* )Buffer, ( const char* )PongMsg, 4 ) == 0 ) {
00187                             led = !led;
00188                             //         debug( "...Pong\r\n" );
00189                             pc.printf("...Pong...\r\n");
00190                             // Send the next PING frame
00191                             strcpy( ( char* )Buffer, ( char* )PingMsg );
00192                             // We fill the buffer with numbers for the payload
00193                             for( i = 4; i < BufferSize; i++ ) {
00194                                 Buffer[i] = i - 4;
00195                             }
00196                             wait_ms( 10 );
00197                             Radio.Send( Buffer, BufferSize );
00198                         } else if( strncmp( ( const char* )Buffer, ( const char* )PingMsg, 4 ) == 0 ) {
00199                             // A master already exists then become a slave
00200                             //         debug( "...Ping\r\n" );
00201                             pc.printf("...Ping...\r\n");
00202                             led = !led;
00203                             isMaster = false;
00204                             // Send th  e next PONG frame
00205                             strcpy( ( char* )Buffer, ( char* )PongMsg );
00206                             // We fill the buffer with numbers for the payload
00207                             for( i = 4; i < BufferSize; i++ ) {
00208                                 Buffer[i] = i - 4;
00209                             }
00210                             wait_ms( 10 );
00211                             Radio.Send( Buffer, BufferSize );
00212                         } else { // valid reception but neither a PING or a PONG message
00213                             // Set device as master ans start again
00214                             isMaster = true;
00215                             Radio.Rx( RX_TIMEOUT_VALUE );
00216                         }
00217                     }
00218                 } else {
00219                     if( BufferSize > 0 ) {
00220                         if( strncmp( ( const char* )Buffer, ( const char* )PingMsg, 4 ) == 0 ) {
00221                             led = !led;
00222                             //debug( "...Ping\r\n" );
00223                             pc.printf("...Ping...\r\n");
00224                             // Send the reply to the PING string
00225                             strcpy( ( char* )Buffer, ( char* )PongMsg );
00226                             // We fill the buffer with numbers for the payload
00227                             for( i = 4; i < BufferSize; i++ ) {
00228                                 Buffer[i] = i - 4;
00229                             }
00230                             wait_ms( 10 );
00231                             Radio.Send( Buffer, BufferSize );
00232                         } else { // valid reception but not a PING as expected
00233                             // Set device as master and start again
00234                             isMaster = true;
00235                             Radio.Rx( RX_TIMEOUT_VALUE );
00236                         }
00237                     }
00238                 }
00239                 State = LOWPOWER;
00240                 break;
00241             case TX:
00242                 led = !led;
00243                 if( isMaster == true ) {
00244                     //  debug( "Ping...\r\n" );
00245                     pc.printf("Ping...\r\n");
00246                 } else {
00247                     //        debug( "Pong...\r\n" );
00248                     pc.printf("Pong...\r\n");
00249                 }
00250                 Radio.Rx( RX_TIMEOUT_VALUE );
00251                 State = LOWPOWER;
00252                 break;
00253             case RX_TIMEOUT:
00254                 if( isMaster == true ) {
00255                     // Send the next PING frame
00256                     strcpy( ( char* )Buffer, ( char* )PingMsg );
00257                     for( i = 4; i < BufferSize; i++ ) {
00258                         Buffer[i] = i - 4;
00259                     }
00260                     wait_ms( 10 );
00261                     Radio.Send( Buffer, BufferSize );
00262                 } else {
00263                     Radio.Rx( RX_TIMEOUT_VALUE );
00264                 }
00265                 State = LOWPOWER;
00266                 break;
00267             case RX_ERROR:
00268                 // We have received a Packet with a CRC error, send reply as if packet was correct
00269                 if( isMaster == true ) {
00270                     // Send the next PING frame
00271                     strcpy( ( char* )Buffer, ( char* )PingMsg );
00272                     for( i = 4; i < BufferSize; i++ ) {
00273                         Buffer[i] = i - 4;
00274                     }
00275                     wait_ms( 10 );
00276                     Radio.Send( Buffer, BufferSize );
00277                 } else {
00278                     // Send the next PONG frame
00279                      strcpy( ( char* )Buffer, ( char* )PongMsg );
00280                     for( i = 4; i < BufferSize; i++ ) {
00281                         Buffer[i] = i - 4;
00282                     }
00283                     wait_ms( 10 );
00284                     Radio.Send( Buffer, BufferSize );
00285                 }
00286                 State = LOWPOWER;
00287                 break;
00288             case TX_TIMEOUT:
00289                 Radio.Rx( RX_TIMEOUT_VALUE );
00290                 State = LOWPOWER;
00291                 break;
00292             case LOWPOWER:
00293                 break;
00294             default:
00295                 State = LOWPOWER;
00296                 break;
00297         }
00298     }
00299  //   while(1);
00300 }
00301 
00302 void OnTxDone( void )
00303 {
00304     Radio.Sleep( );
00305     State = TX;
00306 //   debug_if( DEBUG_MESSAGE, "> OnTxDone\n\r" );
00307     pc.printf("> OnTxDone\r\n");
00308 
00309 }
00310 
00311 void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr)
00312 {
00313     Radio.Sleep( );
00314     BufferSize = size;
00315     memcpy( Buffer, payload, BufferSize );
00316     RssiValue = rssi;
00317     SnrValue = snr;
00318     State = RX;
00319     //  debug_if( DEBUG_MESSAGE, "> OnRxDone\n\r" );
00320     pc.printf("> OnRxDone\r\n");
00321     pc.printf("size:%d rssi:%d snr:%d",size,rssi,snr);
00322     srprintf(payload,sizeof(payload));
00323     Radio.Rx( RX_TIMEOUT_VALUE );
00324 }
00325 
00326 void OnTxTimeout( void )
00327 {
00328     Radio.Sleep( );
00329     State = TX_TIMEOUT;
00330 //    debug_if( DEBUG_MESSAGE, "> OnTxTimeout\n\r" );
00331     pc.printf("> OnTxTimeout\r\n");
00332     Radio.Rx( RX_TIMEOUT_VALUE );
00333 }
00334 
00335 void OnRxTimeout( void )
00336 {
00337     Radio.Sleep( );
00338     Buffer[ BufferSize ] = 0;
00339     State = RX_TIMEOUT;
00340 //   debug_if( DEBUG_MESSAGE, "> OnRxTimeout\n\r" );
00341     pc.printf("> OnRxTimeout\r\n");
00342     Radio.Rx( RX_TIMEOUT_VALUE );
00343 }
00344 
00345 void OnRxError( void )
00346 {
00347     Radio.Sleep( );
00348     State = RX_ERROR;
00349 //   debug_if( DEBUG_MESSAGE, "> OnRxError\n\r" );
00350     pc.printf("> OnRxError\r\n");
00351     Radio.Rx( RX_TIMEOUT_VALUE );
00352 }
00353