SenseSemi
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msgtran
This program provides 2km range
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main.cpp
00001 #include "mbed.h" 00002 #include "main.h" 00003 #include "sx1276-hal.h" 00004 #include "debug.h" 00005 00006 /* Set this flag to '1' to display debug messages on the console */ 00007 #define DEBUG_MESSAGE 0 00008 00009 /* Set this flag to '1' to use the LoRa modulation or to '0' to use FSK modulation */ 00010 #define USE_MODEM_LORA 1 00011 #define USE_MODEM_FSK !USE_MODEM_LORA 00012 00013 #define RF_FREQUENCY 868000000 // Hz 00014 #define TX_OUTPUT_POWER 14 // 14 dBm 00015 00016 #if USE_MODEM_LORA == 1 00017 00018 #define LORA_BANDWIDTH 0 // [0: 125 kHz, 00019 // 1: 250 kHz, 00020 // 2: 500 kHz, 00021 // 3: Reserved] 00022 #define LORA_SPREADING_FACTOR 12 // [SF7..SF12] 00023 #define LORA_CODINGRATE 1 // [1: 4/5, 00024 // 2: 4/6, 00025 // 3: 4/7, 00026 // 4: 4/8] 00027 #define LORA_PREAMBLE_LENGTH 8 // Same for Tx and Rx 00028 #define LORA_SYMBOL_TIMEOUT 5 // Symbols 00029 #define LORA_FIX_LENGTH_PAYLOAD_ON false 00030 #define LORA_FHSS_ENABLED false 00031 #define LORA_NB_SYMB_HOP 4 00032 #define LORA_IQ_INVERSION_ON false 00033 #define LORA_CRC_ENABLED true 00034 #define LowDatarateOptimize true 00035 #elif USE_MODEM_FSK == 1 00036 00037 #define FSK_FDEV 25000 // Hz 00038 #define FSK_DATARATE 19200 // bps 00039 #define FSK_BANDWIDTH 50000 // Hz 00040 #define FSK_AFC_BANDWIDTH 83333 // Hz 00041 #define FSK_PREAMBLE_LENGTH 5 // Same for Tx and Rx 00042 #define FSK_FIX_LENGTH_PAYLOAD_ON false 00043 #define FSK_CRC_ENABLED true 00044 00045 #else 00046 #error "Please define a modem in the compiler options." 00047 #endif 00048 00049 #define RX_TIMEOUT_VALUE 3500000 // in us 00050 #define BUFFER_SIZE 32 // Define the payload size here 00051 00052 #if( defined ( TARGET_KL25Z ) || defined ( TARGET_LPC11U6X ) ) 00053 DigitalOut led(LED2); 00054 #else 00055 DigitalOut led(LED1); 00056 #endif 00057 00058 /* 00059 * Global variables declarations 00060 */ 00061 typedef enum 00062 { 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 }AppStates_t; 00076 00077 volatile AppStates_t State = LOWPOWER; 00078 00079 /*! 00080 * Radio events function pointer 00081 */ 00082 static RadioEvents_t RadioEvents; 00083 00084 /* 00085 * Global variables declarations 00086 */ 00087 SX1276MB1xAS Radio( NULL ); 00088 00089 const uint8_t PingMsg[] = "PING"; 00090 const uint8_t PongMsg[] = "PONG"; 00091 00092 uint16_t BufferSize = BUFFER_SIZE; 00093 uint8_t Buffer[BUFFER_SIZE]; 00094 00095 int16_t RssiValue = 0.0; 00096 int8_t SnrValue = 0.0; 00097 00098 int main() 00099 { 00100 uint8_t i; 00101 bool isMaster = true; 00102 00103 debug( "\n\n\r SX1276 Ping Pong Demo Application \n\n\r" ); 00104 00105 // Initialize Radio driver 00106 RadioEvents.TxDone = OnTxDone; 00107 RadioEvents.RxDone = OnRxDone; 00108 RadioEvents.RxError = OnRxError; 00109 RadioEvents.TxTimeout = OnTxTimeout; 00110 RadioEvents.RxTimeout = OnRxTimeout; 00111 Radio.Init( &RadioEvents ); 00112 00113 // verify the connection with the board 00114 while( Radio.Read( REG_VERSION ) == 0x00 ) 00115 { 00116 debug( "Radio could not be detected!\n\r", NULL ); 00117 wait( 1 ); 00118 } 00119 00120 debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1276MB1LAS ) ) , "\n\r > Board Type: SX1276MB1LAS < \n\r" ); 00121 debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1276MB1MAS ) ) , "\n\r > Board Type: SX1276MB1MAS < \n\r" ); 00122 00123 Radio.SetChannel( RF_FREQUENCY ); 00124 00125 #if USE_MODEM_LORA == 1 00126 00127 debug_if( LORA_FHSS_ENABLED, "\n\n\r > LORA FHSS Mode < \n\n\r"); 00128 debug_if( !LORA_FHSS_ENABLED, "\n\n\r > LORA Mode < \n\n\r"); 00129 00130 Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH, 00131 LORA_SPREADING_FACTOR, LORA_CODINGRATE, 00132 LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON, 00133 LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP, 00134 LORA_IQ_INVERSION_ON, 2000000 ); 00135 00136 Radio.SetRxConfig( MODEM_LORA, LORA_BANDWIDTH, LORA_SPREADING_FACTOR, 00137 LORA_CODINGRATE, 0, LORA_PREAMBLE_LENGTH, 00138 LORA_SYMBOL_TIMEOUT, LORA_FIX_LENGTH_PAYLOAD_ON, 0, 00139 LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP, 00140 LORA_IQ_INVERSION_ON, true ); 00141 00142 #elif USE_MODEM_FSK == 1 00143 00144 debug("\n\n\r > FSK Mode < \n\n\r"); 00145 Radio.SetTxConfig( MODEM_FSK, TX_OUTPUT_POWER, FSK_FDEV, 0, 00146 FSK_DATARATE, 0, 00147 FSK_PREAMBLE_LENGTH, FSK_FIX_LENGTH_PAYLOAD_ON, 00148 FSK_CRC_ENABLED, 0, 0, 0, 2000000 ); 00149 00150 Radio.SetRxConfig( MODEM_FSK, FSK_BANDWIDTH, FSK_DATARATE, 00151 0, FSK_AFC_BANDWIDTH, FSK_PREAMBLE_LENGTH, 00152 0, FSK_FIX_LENGTH_PAYLOAD_ON, 0, FSK_CRC_ENABLED, 00153 0, 0, false, true ); 00154 00155 #else 00156 00157 #error "Please define a modem in the compiler options." 00158 00159 #endif 00160 00161 debug_if( DEBUG_MESSAGE, "Starting Ping-Pong loop\r\n" ); 00162 00163 led = 0; 00164 00165 Radio.Rx( RX_TIMEOUT_VALUE ); 00166 00167 while( 1 ) 00168 { 00169 switch( State ) 00170 { 00171 case RX: 00172 if( isMaster == true ) 00173 { 00174 if( BufferSize > 0 ) 00175 { 00176 if( strncmp( ( const char* )Buffer, ( const char* )PongMsg, 4 ) == 0 ) 00177 { 00178 led = !led; 00179 debug( "...Pong\r\n" ); 00180 // Send the next PING frame 00181 strcpy( ( char* )Buffer, ( char* )PingMsg ); 00182 // We fill the buffer with numbers for the payload 00183 for( i = 4; i < BufferSize; i++ ) 00184 { 00185 Buffer[i] = i - 4; 00186 } 00187 wait_ms( 10 ); 00188 Radio.Send( Buffer, BufferSize ); 00189 } 00190 else if( strncmp( ( const char* )Buffer, ( const char* )PingMsg, 4 ) == 0 ) 00191 { // A master already exists then become a slave 00192 debug( "...Ping\r\n" ); 00193 led = !led; 00194 isMaster = false; 00195 // Send the next PONG frame 00196 strcpy( ( char* )Buffer, ( char* )PongMsg ); 00197 // We fill the buffer with numbers for the payload 00198 for( i = 4; i < BufferSize; i++ ) 00199 { 00200 Buffer[i] = i - 4; 00201 } 00202 wait_ms( 10 ); 00203 Radio.Send( Buffer, BufferSize ); 00204 } 00205 else // valid reception but neither a PING or a PONG message 00206 { // Set device as master ans start again 00207 isMaster = true; 00208 Radio.Rx( RX_TIMEOUT_VALUE ); 00209 } 00210 } 00211 } 00212 else 00213 { 00214 if( BufferSize > 0 ) 00215 { 00216 if( strncmp( ( const char* )Buffer, ( const char* )PingMsg, 4 ) == 0 ) 00217 { 00218 led = !led; 00219 debug( "...Ping\r\n" ); 00220 // Send the reply to the PING string 00221 strcpy( ( char* )Buffer, ( char* )PongMsg ); 00222 // We fill the buffer with numbers for the payload 00223 for( i = 4; i < BufferSize; i++ ) 00224 { 00225 Buffer[i] = i - 4; 00226 } 00227 wait_ms( 10 ); 00228 Radio.Send( Buffer, BufferSize ); 00229 } 00230 else // valid reception but not a PING as expected 00231 { // Set device as master and start again 00232 isMaster = true; 00233 Radio.Rx( RX_TIMEOUT_VALUE ); 00234 } 00235 } 00236 } 00237 State = LOWPOWER; 00238 break; 00239 case TX: 00240 led = !led; 00241 if( isMaster == true ) 00242 { 00243 debug( "Ping...\r\n" ); 00244 } 00245 else 00246 { 00247 debug( "Pong...\r\n" ); 00248 } 00249 Radio.Rx( RX_TIMEOUT_VALUE ); 00250 State = LOWPOWER; 00251 break; 00252 case RX_TIMEOUT: 00253 if( isMaster == true ) 00254 { 00255 // Send the next PING frame 00256 strcpy( ( char* )Buffer, ( char* )PingMsg ); 00257 for( i = 4; i < BufferSize; i++ ) 00258 { 00259 Buffer[i] = i - 4; 00260 } 00261 wait_ms( 10 ); 00262 Radio.Send( Buffer, BufferSize ); 00263 } 00264 else 00265 { 00266 Radio.Rx( RX_TIMEOUT_VALUE ); 00267 } 00268 State = LOWPOWER; 00269 break; 00270 case RX_ERROR: 00271 // We have received a Packet with a CRC error, send reply as if packet was correct 00272 if( isMaster == true ) 00273 { 00274 // Send the next PING frame 00275 strcpy( ( char* )Buffer, ( char* )PingMsg ); 00276 for( i = 4; i < BufferSize; i++ ) 00277 { 00278 Buffer[i] = i - 4; 00279 } 00280 wait_ms( 10 ); 00281 Radio.Send( Buffer, BufferSize ); 00282 } 00283 else 00284 { 00285 // Send the next PONG frame 00286 strcpy( ( char* )Buffer, ( char* )PongMsg ); 00287 for( i = 4; i < BufferSize; i++ ) 00288 { 00289 Buffer[i] = i - 4; 00290 } 00291 wait_ms( 10 ); 00292 Radio.Send( Buffer, BufferSize ); 00293 } 00294 State = LOWPOWER; 00295 break; 00296 case TX_TIMEOUT: 00297 Radio.Rx( RX_TIMEOUT_VALUE ); 00298 State = LOWPOWER; 00299 break; 00300 case LOWPOWER: 00301 break; 00302 default: 00303 State = LOWPOWER; 00304 break; 00305 } 00306 } 00307 } 00308 00309 void OnTxDone( void ) 00310 { 00311 Radio.Sleep( ); 00312 State = TX; 00313 debug_if( DEBUG_MESSAGE, "> OnTxDone\n\r" ); 00314 } 00315 00316 void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr) 00317 { 00318 Radio.Sleep( ); 00319 BufferSize = size; 00320 memcpy( Buffer, payload, BufferSize ); 00321 RssiValue = rssi; 00322 SnrValue = snr; 00323 State = RX; 00324 debug_if( DEBUG_MESSAGE, "> OnRxDone\n\r" ); 00325 } 00326 00327 void OnTxTimeout( void ) 00328 { 00329 Radio.Sleep( ); 00330 State = TX_TIMEOUT; 00331 debug_if( DEBUG_MESSAGE, "> OnTxTimeout\n\r" ); 00332 } 00333 00334 void OnRxTimeout( void ) 00335 { 00336 Radio.Sleep( ); 00337 Buffer[ BufferSize ] = 0; 00338 State = RX_TIMEOUT; 00339 debug_if( DEBUG_MESSAGE, "> OnRxTimeout\n\r" ); 00340 } 00341 00342 void OnRxError( void ) 00343 { 00344 Radio.Sleep( ); 00345 State = RX_ERROR; 00346 debug_if( DEBUG_MESSAGE, "> OnRxError\n\r" ); 00347 } 00348
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