H261 decoder
Dependencies: SDL_lib2 SX1276Lib mbed
lora.h
- Committer:
- miruga27
- Date:
- 2016-09-22
- Revision:
- 0:5bd441b8ab2d
- Child:
- 1:1ed97958d0f3
File content as of revision 0:5bd441b8ab2d:
//Author: Miguel Ruiz García //Company: University of Cantabria. 2016 //mail: mrg47@alumnos.unican.es //code for TX & RX #include "mbed.h" #include "lora2.h" #include "sx1276-hal.h" #include "debug.h" //#include "functions.h" /* Set this flag to '1' to display debug messages on the console */ #define DEBUG_MESSAGE 1 /* Set this flag to '1' to use the LoRa modulation or to '0' to use FSK modulation */ #define USE_MODEM_LORA 1 #define USE_MODEM_FSK !USE_MODEM_LORA #define RF_FREQUENCY 869000000 // Hz #define TX_OUTPUT_POWER 14 // 14 dBm #if USE_MODEM_LORA == 1 #define LORA_BANDWIDTH 1 // [0: 125 kHz, // 1: 250 kHz, // 2: 500 kHz, // 3: Reserved] #define LORA_SPREADING_FACTOR 10 // [SF7..SF12] #define LORA_CODINGRATE 1 // [1: 4/5, // 2: 4/6, // 3: 4/7, // 4: 4/8] #define LORA_PREAMBLE_LENGTH 8 // Same for Tx and Rx #define LORA_SYMBOL_TIMEOUT 5 // Symbols #define LORA_FIX_LENGTH_PAYLOAD_ON false #define LORA_FHSS_ENABLED true #define LORA_NB_SYMB_HOP 4 #define LORA_IQ_INVERSION_ON false #define LORA_CRC_ENABLED true #elif USE_MODEM_FSK == 1 #define FSK_FDEV 25000 // Hz #define FSK_DATARATE 19200 // bps #define FSK_BANDWIDTH 50000 // Hz #define FSK_AFC_BANDWIDTH 83333 // Hz #define FSK_PREAMBLE_LENGTH 5 // Same for Tx and Rx #define FSK_FIX_LENGTH_PAYLOAD_ON false #define FSK_CRC_ENABLED true #else #error "Please define a modem in the compiler options." #endif #define RX_TIMEOUT_VALUE 3500000 // in us #define BUFFER_SIZE 255 // Define the payload size here [min:1 max:255] #if( defined ( TARGET_KL25Z ) || defined ( TARGET_LPC11U6X ) ) DigitalOut led(LED2); #else DigitalOut led(LED1); #endif /* * Global variables declarations */ typedef enum { LOWPOWER = 0, IDLE, RX, RX_TIMEOUT, RX_ERROR, TX, TX_TIMEOUT, CAD, CAD_DONE }AppStates_t; volatile AppStates_t State = LOWPOWER; /*! * Radio events function pointer */ static RadioEvents_t RadioEvents; /* * Global variables declarations */ SX1276MB1xAS Radio( NULL ); const uint8_t PingMsg[] = "PING"; const uint8_t PongMsg[] = "PONG"; const uint8_t AckMsg[] = "ACK"; const uint8_t EOPMsg[] = "EOP"; const uint8_t RfSMsg[] = "RfS"; int py=0,pu=0,pv=0,py2=0,pu2=0,pv2=0; int py_ant=0,pu_ant=0,pv_ant=0; int flag_y=0,flag_u=0,flag_v=0; uint16_t BufferSize = BUFFER_SIZE; uint8_t Buffer[BUFFER_SIZE]; //uint8_t Buffer2[4]; int16_t RssiValue = 0.0; int8_t SnrValue = 0.0; bool first_y=true,first_u=true,first_v=true; void lora(short int *temp1,short int index1,short int *temp2,short int index2,short int *temp3,short int index3) { //index1=300;index2=300;index3=300; uint8_t i; bool isMaster = false;//MASTER (TX) OR SLAVE(RX) ? //pc.baud(BPS); //pc.format (BITS,SerialBase::None, STOP_BITS) ; //debug( "\n\n\r SX1276 Ping Pong Demo Application \n\n\r" ); //pc.printf("\n\n\r SX1276 Image transfer Application \n\n\r"); // Initialize Radio driver RadioEvents.TxDone = OnTxDone; RadioEvents.RxDone = OnRxDone; RadioEvents.RxError = OnRxError; RadioEvents.TxTimeout = OnTxTimeout; RadioEvents.RxTimeout = OnRxTimeout; RadioEvents.FhssChangeChannel = OnFhssChangeChannel; Radio.Init( &RadioEvents ); // verify the connection with the board goto start; while( Radio.Read( REG_VERSION ) == 0x00 ) { //debug( "Radio could not be detected!\n\r", NULL ); //pc.printf( "Radio could not be detected!\n\r", NULL ); wait( 1 ); } start: //debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1276MB1LAS ) ) , "\n\r > Board Type: SX1276MB1LAS < \n\r" ); //debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1276MB1MAS ) ) , "\n\r > Board Type: SX1276MB1MAS < \n\r" ); Radio.SetChannel( HoppingFrequencies[0] ); #if USE_MODEM_LORA == 1 //debug_if( LORA_FHSS_ENABLED, "\n\n\r > LORA FHSS Mode < \n\n\r"); //debug_if( !LORA_FHSS_ENABLED, "\n\n\r > LORA Mode < \n\n\r"); Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH, LORA_SPREADING_FACTOR, LORA_CODINGRATE, LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON, LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP, LORA_IQ_INVERSION_ON, 4000000 ); Radio.SetRxConfig( MODEM_LORA, LORA_BANDWIDTH, LORA_SPREADING_FACTOR, LORA_CODINGRATE, 0, LORA_PREAMBLE_LENGTH, LORA_SYMBOL_TIMEOUT, LORA_FIX_LENGTH_PAYLOAD_ON, 0, LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP, LORA_IQ_INVERSION_ON, true ); #elif USE_MODEM_FSK == 1 debug("\n\n\r > FSK Mode < \n\n\r"); Radio.SetTxConfig( MODEM_FSK, TX_OUTPUT_POWER, FSK_FDEV, 0, FSK_DATARATE, 0, FSK_PREAMBLE_LENGTH, FSK_FIX_LENGTH_PAYLOAD_ON, FSK_CRC_ENABLED, 0, 0, 0, 3000000 ); Radio.SetRxConfig( MODEM_FSK, FSK_BANDWIDTH, FSK_DATARATE, 0, FSK_AFC_BANDWIDTH, FSK_PREAMBLE_LENGTH, 0, FSK_FIX_LENGTH_PAYLOAD_ON, 0, FSK_CRC_ENABLED, 0, 0, false, true ); #else #error "Please define a modem in the compiler options." #endif //debug_if( DEBUG_MESSAGE, "Starting image transmission loop\r\n" ); //pc.printf("Starting image transmission loop\r\n"); led = 0; Radio.Rx( RX_TIMEOUT_VALUE ); State=RX;//Estado inicial para el receptor while( 1 ) { switch( State ) { case RX: if( isMaster == true ) { //debug( "waiting for response....\r\n" ); if( BufferSize > 0 ) { if( strncmp( ( const char* )Buffer, ( const char* )AckMsg, 3 ) != 0 ) { led = !led; //debug( "Packet acknoledged....\r\n" ); // pc.printf( "Packet acknoledged....\r\n" ); // Send the next frame State = TX; } else if( strncmp( ( const char* )Buffer, ( const char* )RfSMsg, 3 ) == 0 ){ led = !led; debug( "Retransmit packet....\r\n" ); // pc.printf( "Retransmit packet....\r\n" ); // Send the next frame State = TX; py=py_ant; pu=pu_ant; pv=pv_ant;//Si hay que reenviar el paquete se reestablecen los valores de punteros. } else // valid reception but neither a message { // Set device as master ans start again debug( "no message received...\r\n" ); // pc.printf( "hola...\r\n" ); isMaster = true;//this intruction is DANGEROUS!!!!!! Radio.Rx( RX_TIMEOUT_VALUE ); } } } else { if( BufferSize > 0 ) { led = !led; debug( "Reading... \r\n" ); // pc.printf( "Reading... \r\n" ); int pointer=0; int length_y=0,length_v=0,length_u=0; for(pointer=0;pointer<254;pointer+=4){ if(flag_y==0) {//se comprueba si se ha cargado en el buffer de transmisión cada una de las componentes if(first_y == true) {//EL PRIMER DATO ES LA LONGITUD length_y=0xff & Buffer[pointer+1]; length_y=length_y<<8; length_y=length_y | Buffer[pointer]; first_y = false; temp1=(short int *)malloc(sizeof(short int)*length_y); pointer-=2;//this is to avoid lose the first byte of the component //in the cycle 'pointer+=4' but in the first package of the component there´s no a pair [length,value] } else{ if(Buffer[pointer]!='\t'){//VERIFY the character is not EOC (end of component y u v) short int num=0; num=0xff & Buffer[pointer+1]; num=num<<8; num=num | Buffer[pointer]; *(temp1+py2)=num; py2++; if (py2 > length_y) {flag_y=1;} num=0xff & Buffer[pointer+3]; num=num<<8; num=num | Buffer[pointer+2]; *(temp1+py2)=num; py2++; if (py2 > length_y) {flag_y=1;}//if all bytes of the component are read, indicator is raised //originally designed with goto. } else { flag_y=1; } } } else if(flag_u==0){ if(first_u == true) { length_u=0xff & Buffer[pointer+1]; length_u=length_u<<8; length_u=length_u | Buffer[pointer]; first_u = false; temp2=(short int *)malloc(sizeof(short int)*length_u); pointer-=2; } else{ if(Buffer[pointer]!='\t'){//VERIFY the character is not "end of component" short int num=0; num=0xff & Buffer[pointer+1]; num=num<<8; num=num | Buffer[pointer]; *(temp2+pu2)=num; pu2++; if (pu2 > length_u) {flag_u=1;} num=0xff & Buffer[pointer+3]; num=num<<8; num=num | Buffer[pointer+2]; *(temp2+pu2)=num; pu2++; if (pu2 > length_u) {flag_u=1;} } else { flag_u=1; } } } else{ if(first_v == true) { length_v=0xff & Buffer[pointer+1]; length_v=length_v<<8; length_v=length_v | Buffer[pointer]; first_v = false; temp3=(short int *)malloc(sizeof(short int)*length_v); pointer-=2; } else{ if(Buffer[pointer]!='\n'){//VERIFY the character is not EOT short int num=0; num=0xff & Buffer[pointer+1]; num=num<<8; num=num | Buffer[pointer]; *(temp3+pv2)=num; py2++; if (pv2 > length_v) {flag_v=1;} num=0xff & Buffer[pointer+3]; num=num<<8; num=num | Buffer[pointer+2]; *(temp3+pv2)=num; pv2++; if (pv2 > length_v) {flag_v=1;} } else { flag_v=1; break; } } } } if(flag_y==1 && flag_u==1 && flag_v ==1){ strcpy( ( char* )Buffer, ( char* )AckMsg ); // We fill the buffer with numbers for the payload for( i = 4; i < BufferSize; i++ ) { Buffer[i] = i - 4; } wait_ms( 10 ); Radio.Send( Buffer, BufferSize ); first_y=true;first_u=true;first_v=true; // debug( "Packet received \r\n" ); // pc.printf( "Packet received \r\n" ); State = LOWPOWER; goto end; } State=TX; } } break; case TX: led = !led; if( isMaster == true ) { //debug( "transmission of packet (320x8)...\r\n" ); //pc.printf( "transmission of packet (320x8)...\r\n" ); int pointer=0; py_ant=py;pu_ant=pu;pv_ant=pv; for(pointer=0;pointer<254;pointer+=2){ if(flag_y==0) {//se comprueba si se ha cargado en el buffer de transmisión cada una de las componentes if(first_y == true) {//en primer lugar se manda la longitud de la componente y u v despues del rlc Buffer[pointer]=index1&0xff; Buffer[pointer+1]=(index1>>8)&0xff; first_y = false; //debug( "transmitting y length...\r\n" ); } else{ Buffer[pointer]=*(temp1+py) & 0x00ff; Buffer[pointer+1]=(*(temp1+py)>>8) & 0x00ff; py++; // debug( "transmitting y data..\r\n" ); if(py >= index1) { flag_y=1; Buffer[pointer+2]='\t'; pointer+=2; } } } else if(flag_u==0){ if(first_u == true) { Buffer[pointer]=index2&0xff; Buffer[pointer+1]=(index2>>8)&0xff; first_u = false; //debug( "transmitting u length...\r\n" ); } else{ Buffer[pointer]=*(temp2+pu) & 0x00ff; Buffer[pointer+1]=(*(temp2+pu)>>8) & 0x00ff; pu++; //debug( "transmitting u data...\r\n" ); if(pu>= index2) { flag_u=1; Buffer[pointer+2]='\t'; pointer+=2; } } } else{ if(first_v == true) { Buffer[pointer]=index2&0xff; Buffer[pointer+1]=(index2>>8)&0xff; first_v = false; //debug( "transmitting v length...\r\n" ); } else{ Buffer[pointer]=*(temp3+pv) & 0x00ff; Buffer[pointer+1]=(*(temp3+pv)>>8) & 0x00ff; pv++; //debug( "transmitting v data ...\r\n" ); if(pv >= index3) { flag_v=1; Buffer[pointer+2]='\n';//salto de línea es EOT pointer+=2; break; } } } } if(flag_y==1 && flag_u==1 && flag_v==1){ Buffer[pointer]='\n';//salto de línea es EOT flag_y=0;flag_u=0;flag_v=0; //debug( "finished transmission ...\r\n" ); first_y=true;first_u=true;first_v=true; goto end; for( i = Buffer[pointer]; i < BufferSize; i++ ) { Buffer[i] = i - 4; } } else{ for( i = Buffer[pointer]; i < BufferSize; i++ ) { Buffer[i] = i - 4; } } wait_ms( 10 ); //debug( "Sending packet...\r\n" ); Radio.Send( Buffer, BufferSize ); // pc.printf( "Sending packet...\r\n" ); } else { //debug( "hola...\r\n" ); //pc.printf( "hola...\r\n" ); strcpy( ( char* )Buffer, ( char* )AckMsg ); for( i = 4; i < BufferSize; i++ ) { Buffer[i] = i - 4; } wait_ms( 10 ); Radio.Send( Buffer, BufferSize ); Radio.Rx( RX_TIMEOUT_VALUE ); } State = RX; break; case RX_TIMEOUT: if( isMaster == true ) { //debug( "hola rx_timeout...\r\n" ); //pc.printf( "hola...\r\n" ); // Send the next PING frame strcpy( ( char* )Buffer, ( char* )RfSMsg ); for( i = 4; i < BufferSize; i++ ) { Buffer[i] = i - 4; } wait_ms( 10 ); Radio.Send( Buffer, BufferSize ); } else { //debug( "hola...\r\n" ); //pc.printf( "hola...\r\n" ); strcpy( ( char* )Buffer, ( char* )RfSMsg ); for( i = 4; i < BufferSize; i++ ) { Buffer[i] = i - 4; } wait_ms( 10 ); Radio.Send( Buffer, BufferSize ); Radio.Rx( RX_TIMEOUT_VALUE ); } State = LOWPOWER; break; case RX_ERROR: // We have received a Packet with a CRC error, request packet again. if( isMaster == true ) { //debug( "hola rx_error...\r\n" ); //pc.printf( "hola...\r\n" ); strcpy( ( char* )Buffer, ( char* )RfSMsg); for( i = 4; i < BufferSize; i++ ) { Buffer[i] = i - 4; } wait_ms( 10 ); Radio.Send( Buffer, BufferSize ); State = LOWPOWER; } else { //debug( "hola ...\r\n" ); //pc.printf( "hola...\r\n" ); // Send the RfS again strcpy( ( char* )Buffer, ( char* )RfSMsg); for( i = 4; i < BufferSize; i++ ) { Buffer[i] = i - 4; } py=py_ant;pu=pu_ant;pv=pv_ant; wait_ms( 10 ); Radio.Send( Buffer, BufferSize ); State = LOWPOWER; } //State = LOWPOWER; break; case TX_TIMEOUT: Radio.Rx( RX_TIMEOUT_VALUE ); State = LOWPOWER; break; case LOWPOWER: break; default: State = LOWPOWER; break; } } end: int a; } void OnTxDone( void ) { Radio.SetChannel( HoppingFrequencies[0] ); Radio.Sleep( ); State = TX; debug_if( DEBUG_MESSAGE, "> OnTxDone\n\r" ); } void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr) { Radio.SetChannel( HoppingFrequencies[0] ); Radio.Sleep( ); BufferSize = size; memcpy( Buffer, payload, BufferSize ); RssiValue = rssi; SnrValue = snr; State = RX; debug_if( DEBUG_MESSAGE, "> OnRxDone\n\r" ); } void OnTxTimeout( void ) { Radio.SetChannel( HoppingFrequencies[0] ); Radio.Sleep( ); State = TX_TIMEOUT; //debug_if( DEBUG_MESSAGE, "> OnTxTimeout\n\r" ); } void OnRxTimeout( void ) { Radio.SetChannel( HoppingFrequencies[0] ); Radio.Sleep( ); Buffer[ BufferSize ] = 0; State = RX_TIMEOUT; //debug_if( DEBUG_MESSAGE, "> OnRxTimeout\n\r" ); } void OnRxError( void ) { Radio.SetChannel( HoppingFrequencies[0] ); Radio.Sleep( ); State = RX_ERROR; debug_if( DEBUG_MESSAGE, "> OnRxError\n\r" ); } void OnFhssChangeChannel( uint8_t channelIndex ) { Radio.SetChannel( HoppingFrequencies[channelIndex] ); debug_if( DEBUG_MESSAGE, "F%d-", channelIndex); }