Diff: main.cpp

Revision:

0:1ed39951ab7b

Child:

1:126d70d374f6

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Aug 19 12:48:26 2014 +0000
@@ -0,0 +1,322 @@
+#include "mbed.h"
+#include "sx1276-hal.h"
+#include "debug.h"
+
+/* Set this flag to '1' to display debug messages on the console */
+#define DEBUG_MESSAGE   0
+
+
+/* Set this flag to '1' to use the LoRa modulation or to '0' to use FSK modulation */
+#define USE_MODEM_LORA  0
+#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                              0         // [0: 125 kHz,
+                                                                  //  1: 250 kHz,
+                                                                  //  2: 500 kHz,
+                                                                  //  3: Reserved]
+    #define LORA_SPREADING_FACTOR                       7         // [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_IQ_INVERSION_ON                        false
+
+#elif USE_MODEM_FSK == 1
+
+    #define FSK_FDEV                                    25e3      // Hz
+    #define FSK_DATARATE                                50e3      // bps
+    #define FSK_BANDWIDTH                               50e3      // Hz
+    #define FSK_AFC_BANDWIDTH                           83.333e3  // Hz
+    #define FSK_PREAMBLE_LENGTH                         5         // Same for Tx and Rx
+    #define FSK_FIX_LENGTH_PAYLOAD_ON                   false
+
+#else
+    #error "Please define a modem in the compiler options."
+#endif
+
+#define RX_TIMEOUT_VALUE                                3000000   // in us
+#define BUFFER_SIZE                                     32        // Define the payload size here
+
+/*
+ * Callback functions prototypes
+ */
+/*!
+ * @brief Function to be executed on Radio Tx Done event
+ */
+void OnTxDone( void );
+
+/*!
+ * @brief Function to be executed on Radio Rx Done event
+ */
+void OnRxDone( uint8_t *payload, uint16_t size, int8_t rssi, int8_t snr );
+
+/*!
+ * @brief Function executed on Radio Tx Timeout event
+ */
+void OnTxTimeout( void );
+
+/*!
+ * @brief Function executed on Radio Rx Timeout event
+ */
+void OnRxTimeout( void );
+
+/*!
+ * @brief Function executed on Radio Rx Error event
+ */
+void OnRxError( void );
+
+/*
+ *  Global variables declarations
+ */
+typedef RadioState States_t;
+
+/*
+ *  Global variables declarations
+ */
+SX1276MB1xAS Radio( OnTxDone, OnTxTimeout, OnRxDone, OnRxTimeout, OnRxError );
+
+const uint8_t PingMsg[] = "PING";
+const uint8_t PongMsg[] = "PONG";
+
+uint16_t BufferSize = BUFFER_SIZE;
+uint8_t Buffer[BUFFER_SIZE];
+
+volatile States_t State = LOWPOWER;
+
+double RssiValue = 0.0;
+double SnrValue = 0.0;
+
+DigitalOut Led( LED1 );
+
+int main() 
+{
+    uint8_t i;
+    bool isMaster = true;
+    
+    debug("\n\r\n\r     SX1276 Ping Pong Demo Application \n\r");
+        
+#if defined TARGET_NUCLEO_L152RE
+    debug( DEBUG_MESSAGE, "         > Nucleo-L152RE Platform <\r\n" );
+#elif defined TARGET_KL25Z
+    debug( DEBUG_MESSAGE, "         > KL25Z Platform <\r\n" );
+#elif defined TARGET_LPC11U6X
+    debug( DEBUG_MESSAGE, "         > LPC11U6X Platform <\r\n" );
+#else
+    debug( DEBUG_MESSAGE, "         > Untested Platform <\r\n" );
+#endif
+    
+
+    Radio.SetChannel( RF_FREQUENCY ); 
+
+#if USE_MODEM_LORA == 1
+
+    debug("\n\r\n\r              > LORA Mode < \n\r\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,
+                         true, LORA_IQ_INVERSION_ON, 3000000 );
+    
+    Radio.SetRxConfig( MODEM_LORA, LORA_BANDWIDTH, LORA_SPREADING_FACTOR,
+                         LORA_CODINGRATE, 0, LORA_PREAMBLE_LENGTH,
+                         LORA_SYMBOL_TIMEOUT, LORA_FIX_LENGTH_PAYLOAD_ON,
+                         true, LORA_IQ_INVERSION_ON, true );
+                         
+#elif USE_MODEM_FSK == 1
+
+    debug("\n\r\n\r              > FSK Mode < \n\r\n\r");
+    Radio.SetTxConfig( MODEM_FSK, TX_OUTPUT_POWER, FSK_FDEV, 0,
+                         FSK_DATARATE, 0,
+                         FSK_PREAMBLE_LENGTH, FSK_FIX_LENGTH_PAYLOAD_ON,
+                         true, 0, 3000000 );
+    
+    Radio.SetRxConfig( MODEM_FSK, FSK_BANDWIDTH, FSK_DATARATE,
+                         0, FSK_AFC_BANDWIDTH, FSK_PREAMBLE_LENGTH,
+                         0, FSK_FIX_LENGTH_PAYLOAD_ON, true,
+                         false, true );
+                         
+#else
+
+#error "Please define a modem in the compiler options."
+
+#endif
+        
+    Radio.Rx( RX_TIMEOUT_VALUE );
+    
+    while( 1 )
+    {
+        switch( State )
+        {
+        case RX:
+            if( isMaster == true )
+            {
+                if( BufferSize > 0 )
+                {
+                    if( strncmp( ( const char* )Buffer, ( const char* )PongMsg, 4 ) == 0 )
+                    {
+                        // Indicates on a LED that the received frame is a PONG
+                        Led = !Led;
+                        debug( "Pong...\r\n" );
+                        // Send the next PING frame            
+                        Buffer[0] = 'P';
+                        Buffer[1] = 'I';
+                        Buffer[2] = 'N';
+                        Buffer[3] = 'G';
+                        // 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 );
+                    }
+                    else if( strncmp( ( const char* )Buffer,
+                             ( const char* )PingMsg, 4 ) == 0 )
+                    { // A master already exists then become a slave
+                        isMaster = false;
+                        Radio.Rx( RX_TIMEOUT_VALUE );
+                    }
+                }
+            }
+            else
+            {
+                if( BufferSize > 0 )
+                {
+                    if( strncmp( ( const char* )Buffer, ( const char* )PingMsg, 4 ) == 0 )
+                    {
+                        // Indicates on a LED that the received frame is a PING
+                        Led = !Led;
+                        debug( "Ping...\r\n" );
+                        // Send the reply to the PONG string
+                        Buffer[0] = 'P';
+                        Buffer[1] = 'O';
+                        Buffer[2] = 'N';
+                        Buffer[3] = 'G';
+                        // 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 );
+                    }
+                }
+            }
+            State = LOWPOWER;
+            break;
+        case TX:
+            // Indicates on a LED that we have sent a PING [Master]
+            // Indicates on a LED that we have sent a PONG [Slave]
+            Led = !Led;
+            if ( isMaster )
+            {
+                debug("...Ping\r\n" );
+            }
+            else
+            {
+                debug("...Pong\r\n" );
+            }
+            
+            Radio.Rx( RX_TIMEOUT_VALUE );
+            State = LOWPOWER;
+            break;
+        case RX_TIMEOUT:
+            if( isMaster == true )
+            {
+                // Send the next PING frame
+                Buffer[0] = 'P';
+                Buffer[1] = 'I';
+                Buffer[2] = 'N';
+                Buffer[3] = 'G';
+                for( i = 4; i < BufferSize; i++ )
+                {
+                    Buffer[i] = i - 4;
+                }
+                wait_ms( 10 ); 
+                Radio.Send( Buffer, BufferSize );
+            }
+            else
+            {
+                Radio.Rx( RX_TIMEOUT_VALUE );  
+            }             
+            State = LOWPOWER;
+            break;
+        case RX_ERROR:
+            if( isMaster == true )
+            {
+                // Send the next PING frame
+                Buffer[0] = 'P';
+                Buffer[1] = 'I';
+                Buffer[2] = 'N';
+                Buffer[3] = 'G';
+                for( i = 4; i < BufferSize; i++ )
+                {
+                    Buffer[i] = i - 4;
+                }
+                wait_ms( 10 );  
+                Radio.Send( Buffer, BufferSize );
+            }
+            else
+            {
+                Radio.Rx( RX_TIMEOUT_VALUE );
+            }
+            State = LOWPOWER;
+            break;
+        case TX_TIMEOUT:
+            Radio.Rx( RX_TIMEOUT_VALUE );
+            State = LOWPOWER;
+            break;
+        case LOWPOWER:
+            break;
+        default:
+            State = LOWPOWER;
+            break;
+        }    
+    }
+}
+
+void OnTxDone( void )
+{
+    debug( DEBUG_MESSAGE, ":OnTxDone\n\r" );
+    State = TX;
+}
+
+void OnRxDone( uint8_t *payload, uint16_t size, int8_t rssi, int8_t snr)
+{
+    debug( DEBUG_MESSAGE, ":OnRxDone\n\r" );
+    Radio.Sleep( );
+    BufferSize = size;
+    memcpy( Buffer, payload, BufferSize );
+    RssiValue = rssi;
+    SnrValue = snr;
+    State = RX;
+}
+
+void OnTxTimeout( void )
+{
+    debug( DEBUG_MESSAGE, ":OnTxTimeout\n\r" );
+    Radio.Sleep( );
+    State = TX_TIMEOUT;
+}
+
+void OnRxTimeout( void )
+{
+    debug( DEBUG_MESSAGE, ":OnRxTimeout\n\r" );
+    Radio.Sleep( );
+    State = RX_TIMEOUT;
+    Buffer[ BufferSize ] = 0;
+}
+
+void OnRxError( void )
+{
+    debug( DEBUG_MESSAGE, ":OnRxError\n\r" );
+    Radio.Sleep( );
+    State = RX_ERROR;
+}