Create a LoRa Modem from the SX1272PingPong example
Fork of SX1272PingPong by
main.cpp
- Committer:
- jerem28
- Date:
- 2017-01-25
- Revision:
- 15:9c3805baa6c1
- Parent:
- 14:3c9348ac486c
File content as of revision 15:9c3805baa6c1:
#include "mbed.h" #include "main.h" #include "sx1272-hal.h" #include "debug.h" /* CONFIGURATION */ #define NODE_ADDR 0x411A /* Set this flag to '1' to display debug messages on the console */ #define DEBUG_MESSAGE 1 #define RX_MODE 1 #define TX_MODE !RX_MODE /* Set the mode RX_MODE or TX_MODE */ #define MODE TX_MODE /* Set the delay (according the duty cycle for the ISM band of the frequency RF_FREQUENCY */ #define DUTY_CYCLE 0.01 //#define DELAY_NEXT_TX_IN_MILLISEC ((int)((timeOnAirInMilli / DUTY_CYCLE)-timeOnAirInMilli)) #define DELAY_NEXT_TX_IN_MILLISEC 5000 /* 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 868100000 // 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 12 // [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 false #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 1000000000 // in us #define BUFFER_SIZE 17 // Define the payload size here Serial pc(USBTX,USBRX); #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 */ SX1272MB2xAS Radio( NULL ); uint16_t BufferSize = BUFFER_SIZE; uint8_t Buffer[BUFFER_SIZE]; int16_t RssiValue = 0; int8_t SnrValue = 0; ModemType Modem; uint16_t SeqNum = 0; // Address of the Source Node uint16_t NodeSrcAddr = NODE_ADDR; void hexprintf(Serial* pc, const uint8_t* buffer, uint16_t size) { for(uint16_t count = 0; count < size; count++) { pc->printf("%02x", buffer[count]); } } const uint8_t Msg[] = "TEST**##abcdefghijklmnopqrstuvwxyz#0123456789#ABCDEFGHIJKLMNOPQRSTUVWXYZ#0123456789#abcdefghijklmnopqrstuvwxyz#0123456789#ABCDEFGHIJKLMNOPQRSTUVWXYZ#0123456789#abcdefghijklmnopqrstuvwxyz#0123456789#ABCDEFGHIJKLMNOPQRSTUVWXYZ#0123456789#abcdefghijklmnopqrs#"; /* abc.. is for padding */ int main() { pc.format(8, Serial::None, 1); pc.baud(115200); debug( ">INFO RX/TX Modem \r\n\n" ); // Initialize Radio driver RadioEvents.TxDone = OnTxDone; RadioEvents.RxDone = OnRxDone; RadioEvents.RxError = OnRxError; RadioEvents.TxTimeout = OnTxTimeout; RadioEvents.RxTimeout = OnRxTimeout; Radio.Init( &RadioEvents ); // verify the connection with the board while( Radio.Read( REG_VERSION ) == 0x00 ) { debug( "Radio could not be detected!\n\r", NULL ); wait( 1 ); } debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1272MB2XAS ) ) , "\n\r > Board Type: SX1272MB2xAS < \n\r" ); Radio.SetChannel( RF_FREQUENCY ); #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, 2000000 ); 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, 2000000 ); 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 led = 0; #if MODE == RX_MODE debug_if( DEBUG_MESSAGE, ">INFO Starting RX loop\r\n" ); // start RX Radio.Rx( RX_TIMEOUT_VALUE ); State = LOWPOWER; #elif MODE == TX_MODE debug_if( DEBUG_MESSAGE, ">INFO Starting TX loop\r\n" ); State = TX; #else #error "Please define a valid mode (RX_MODE, TX_MODE)." #endif // TODO ECHO_MODE : RX_MODE then TX_MODE while( 1 ) { switch( State ) { case RX: if( BufferSize > 0 ) { led = !led; // Invert LED // TODO ADD tmst | number | Internal timestamp of "RX finished" event (32b unsigned) pc.printf(">INFO RX modem=%d size=%d rssi=%d snr=%d freq=%d bw=%d sf=%d cr=%d buffer=", Modem, BufferSize, RssiValue, SnrValue, RF_FREQUENCY, LORA_BANDWIDTH, LORA_SPREADING_FACTOR, LORA_CODINGRATE ); hexprintf(&pc, Buffer, BufferSize); pc.printf("\r\n"); pc.printf("RX;%d;%d;%d;%d;%d;%d;%d;%d;", Modem, BufferSize, RssiValue, SnrValue, RF_FREQUENCY, LORA_BANDWIDTH, LORA_SPREADING_FACTOR, LORA_CODINGRATE ); hexprintf(&pc, Buffer, BufferSize); pc.printf("\r\n"); // wait_ms( 10 ); Radio.Rx( RX_TIMEOUT_VALUE ); } State = LOWPOWER; break; case RX_TIMEOUT: Radio.Rx( RX_TIMEOUT_VALUE ); State = LOWPOWER; break; case RX_ERROR: // We have received a Packet with a CRC error pc.printf(">INFO RX_ERROR size=%d\r\n", BufferSize); pc.printf("RX_ERROR;%d\r\n", BufferSize); Radio.Rx( RX_TIMEOUT_VALUE ); State = LOWPOWER; break; case TX_TIMEOUT: pc.printf(">TX: TIMEOUT\r\n"); case TX: int timeOnAirInMilli = Radio.TimeOnAir(Modem,BufferSize)/1000; if(DELAY_NEXT_TX_IN_MILLISEC!=0) { pc.printf(">INFO: wait %.4f sec before TX\r\n", DELAY_NEXT_TX_IN_MILLISEC/1000.0); wait_ms( DELAY_NEXT_TX_IN_MILLISEC ); } led = !led; // Invert LED memcpy(( char* )Buffer, ( char* ) Msg, BufferSize); ++SeqNum; TemperatureValue = Radio.Read( REG_TEMP ); /* refresh counters in payload (big endian, for readability) */ Buffer[4] = (uint8_t)(SeqNum >> 8); /* MSB */ Buffer[5] = (uint8_t)(SeqNum & 0x00FF); /* LSB */ Buffer[6] = (uint8_t)(NodeSrcAddr >> 8); /* MSB */ Buffer[7] = (uint8_t)(NodeSrcAddr & 0x00FF); /* LSB */ Buffer[8] = (uint8_t)(TemperatureValue >> 8); /* MSB */ Buffer[9] = (uint8_t)(TemperatureValue & 0x00FF); /* LSB */ /* send packet */ pc.printf(">TX: temp=%d src=%4x seqnum=%u size=%d timeOnAir=%.4f\r\n", TemperatureValue, NodeSrcAddr, SeqNum, BufferSize, timeOnAirInMilli/1000.0); wait_ms( 10 ); Radio.Send( Buffer, BufferSize ); State = LOWPOWER; break; case LOWPOWER: break; default: State = LOWPOWER; break; } } } void OnTxDone( void ) { 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.Sleep( ); BufferSize = size; memcpy( Buffer, payload, BufferSize ); RssiValue = rssi; SnrValue = snr; State = RX; debug_if( DEBUG_MESSAGE, "> OnRxDone\n\r" ); } void OnTxTimeout( void ) { Radio.Sleep( ); State = TX_TIMEOUT; debug_if( DEBUG_MESSAGE, "> OnTxTimeout\n\r" ); } void OnRxTimeout( void ) { Radio.Sleep( ); Buffer[ BufferSize ] = 0; State = RX_TIMEOUT; debug_if( DEBUG_MESSAGE, "> OnRxTimeout\n\r" ); } void OnRxError( void ) { Radio.Sleep( ); State = RX_ERROR; debug_if( DEBUG_MESSAGE, "> OnRxError\n\r" ); }