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Demo for Semtech Lora SX1272MB2xAS 868MHz an NUCLEO-F401RE (STM Cortex M4)
Fork of SX1272PingPong by
main.cpp
- Committer:
- GregCr
- Date:
- 2014-08-20
- Revision:
- 1:126d70d374f6
- Parent:
- 0:1ed39951ab7b
- Child:
- 2:59e108728d71
File content as of revision 1:126d70d374f6:
#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 1 #define USE_MODEM_FSK !USE_MODEM_LORA #define RF_FREQUENCY 868000000 // Hz #define TX_OUTPUT_POWER 14 // 14 dBm #if USE_MODEM_LORA == 1 #define LORA_BANDWIDTH 2 // [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 9600 // 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; 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 debug( DEBUG_MESSAGE, "SX1276 Chipset Version = 0x%x \n\r", Radio.Read( REG_VERSION ) ); 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 debug( DEBUG_MESSAGE, "Starting Ping-Pong loop\r\n" ); 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 ) { 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 ) { 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: 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( ); Buffer[ BufferSize ] = 0; State = RX_TIMEOUT; } void OnRxError( void ) { debug( DEBUG_MESSAGE, ":OnRxError\n\r" ); Radio.Sleep( ); State = RX_ERROR; }