Delong Qi
SX1276 Ping Pong Demo Application
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SX1276PingPong
by 
Semtech
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;
+}