main.cpp

00001 #include "mbed.h"
00002 #include "config.h"
00003 #include "sx1276-mbed-hal.h"
00004 #include "main.h"
00005 
00006 // Override stdout to use our serial port
00007 FileHandle* mbed::mbed_override_console(int fd) {
00008     static UARTSerial pc(PA_9, PA_10, 115200);
00009     return &pc;
00010 }
00011 
00012 
00013 static RadioEvents_t RadioEvents;
00014 
00015 SX1276Generic *Radio;
00016 DigitalOut blueLed = DigitalOut(LED);
00017 
00018 // NOTE: By default the sample application is in recieve mode.
00019 // Connect PIN PC_2 to 3.3v to transmit
00020 DigitalIn txModeIndicator = DigitalIn(TX_IND, PullDown);
00021 
00022 int timeoutCount, errCount, recvCount = 0;
00023 
00024 int main() 
00025 {
00026     
00027     blueLed = 1;
00028 
00029     Radio = new SX1276Generic(NULL, RFM95_SX1276,
00030             LORA_SPI_MOSI, LORA_SPI_MISO, LORA_SPI_SCLK, LORA_CS, LORA_RESET,
00031             LORA_DIO0, LORA_DIO1, LORA_DIO2, LORA_DIO3, LORA_DIO4, LORA_DIO5);
00032         
00033     printf("LoDev RX/TX Demo Application\n" );
00034     printf("Freqency: %.1f\n", (double)RF_FREQUENCY/1000000.0);
00035     printf("TXPower: %d dBm\n",  TX_OUTPUT_POWER);
00036     printf("Bandwidth: %d Hz\n", LORA_BANDWIDTH);
00037     printf("Spreading factor: SF%d\n", LORA_SPREADING_FACTOR);
00038     
00039     // Initialize Radio driver
00040     RadioEvents.TxDone = OnTxDone;
00041     RadioEvents.RxDone = OnRxDone;
00042     RadioEvents.RxError = OnRxError;
00043     RadioEvents.TxTimeout = OnTxTimeout;
00044     RadioEvents.RxTimeout = OnRxTimeout;    
00045     if (Radio->Init( &RadioEvents ) == false) {
00046         while(1) {
00047             printf("Radio could not be detected!\n");
00048             wait( 1 );
00049         }
00050     }
00051 
00052     Radio->DetectBoardType();
00053     Radio->SetChannel(RF_FREQUENCY ); 
00054 
00055     Radio->SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
00056                          LORA_SPREADING_FACTOR, LORA_CODINGRATE,
00057                          LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
00058                          LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP, 
00059                          LORA_IQ_INVERSION_ON, 2000 );
00060     
00061     Radio->SetRxConfig( MODEM_LORA, LORA_BANDWIDTH, LORA_SPREADING_FACTOR,
00062                          LORA_CODINGRATE, 0, LORA_PREAMBLE_LENGTH,
00063                          LORA_SYMBOL_TIMEOUT, LORA_FIX_LENGTH_PAYLOAD_ON, 0,
00064                          LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP, 
00065                          LORA_IQ_INVERSION_ON, true );
00066                               
00067     printf("Starting loop\n"); 
00068         
00069     uint16_t frameCount = 0;
00070     char buffer[18]; 
00071 
00072     bool txMode = false;    
00073     if(txModeIndicator == 1) {
00074         // Transmit
00075         txMode = true;
00076     } else {
00077         Radio->Rx(0);
00078     }
00079 
00080     while( 1 )
00081     {
00082         blueLed = 1;
00083         if(txMode) {
00084             wait_ms(5000);
00085             sprintf(buffer, "%u Hello World", frameCount);
00086             printf("Sending packet: %s\n", buffer);
00087             Radio->Send( buffer, strlen(buffer) );
00088             frameCount++;
00089         } else {
00090             wait_ms(100);
00091         }
00092         
00093     }
00094 }
00095 
00096 void OnTxDone(void *radio, void *userThisPtr, void *userData)
00097 {
00098     Radio->Sleep( );
00099     blueLed = 0;
00100     printf("> OnTxDone\n");
00101 }
00102 
00103 void OnRxDone(void *radio, void *userThisPtr, void *userData, uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr)
00104 {
00105     Radio->Sleep( );
00106     blueLed = 0;
00107     recvCount++;
00108     printf("Status: Recv=%d, Error=%d, Timeout=%d\n", recvCount, errCount, timeoutCount);
00109     printf("> OnRxDone: RssiValue=%d dBm, SnrValue=%d\n", rssi, snr);
00110     printf("Data[%d]: %.*s\n", size, size, payload);
00111     Radio->Rx(0);
00112 }
00113 
00114 void OnTxTimeout(void *radio, void *userThisPtr, void *userData)
00115 {
00116     Radio->Sleep( );
00117     blueLed = 0;
00118     printf("> OnTxTimeout\n");
00119 }
00120 
00121 void OnRxTimeout(void *radio, void *userThisPtr, void *userData)
00122 {
00123     Radio->Sleep( );
00124     blueLed = 0;
00125     printf("> OnRxTimeout\n");
00126     timeoutCount++;
00127     blueLed = 0;
00128     Radio->Rx(0);
00129 }
00130 
00131 void OnRxError(void *radio, void *userThisPtr, void *userData)
00132 {
00133     Radio->Sleep( );
00134     printf("> OnRxError\n");
00135     errCount++;
00136     blueLed = 0;
00137     Radio->Rx(0);
00138 }