Akash Vibhute
First attempt at LoRa USB Rx
Dependencies: BufferedSerial SX1276GenericLib mbed
Fork of
DISCO-L072CZ-LRWAN1_LoRa_PingPong
by 
ST
Diff: main.cpp
- Revision:
- 11:17b932171aee
- Parent:
- 10:f84959c2e044
diff -r f84959c2e044 -r 17b932171aee main.cpp
--- a/main.cpp Tue Jun 06 12:21:21 2017 +0000
+++ b/main.cpp Tue Jan 02 06:32:31 2018 +0000
@@ -8,15 +8,240 @@
DigitalOut myled(LED1);
BufferedSerial *ser;
+
+#ifdef FEATURE_LORA
+
+/* 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 915000000//RF_FREQUENCY_868_1 // Hz
+#define TX_OUTPUT_POWER 20 // 14 dBm
+
+#if USE_MODEM_LORA == 1
+
+#define LORA_BANDWIDTH 125000 // LoRa default, details in SX1276::BandwidthMap
+#define LORA_SPREADING_FACTOR LORA_SF12
+#define LORA_CODINGRATE LORA_ERROR_CODING_RATE_4_5
+
+#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 8000//3500 // in ms
+
+//#define BUFFER_SIZE 32 // Define the payload size here
+#define BUFFER_SIZE 4//64 // Define the payload size here
+
+/*
+ * 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
+ */
+SX1276Generic *Radio;
+
+
+//const uint8_t PingMsg[] = { 0xff, 0xff, 0x00, 0x00, 'P', 'I', 'N', 'G'};// "PING";
+const uint8_t PingMsg[] = { 'P', 'I', 'N', 'G'};// "PING";
+//const uint8_t PongMsg[] = { 0xff, 0xff, 0x00, 0x00, 'P', 'O', 'N', 'G'};// "PONG";
+const uint8_t PongMsg[] = { 'P', 'O', 'N', 'G'};// "PONG";
+
+uint16_t BufferSize = BUFFER_SIZE;
+uint8_t *Buffer;
+
+DigitalOut *led3;
+DigitalOut *led = new DigitalOut(LED1);
+
+uint8_t i;
+bool isMaster = false;
+
+uint8_t SX1276DataTx[4];
+uint8_t SX1276DataRx[4];
+bool mode = false; // false is slave, true is master
+
+uint8_t serialRxBuffer[4];
int main() {
SystemClock_Config();
ser = new BufferedSerial(USBTX, USBRX);
- ser->baud(115200*2);
+ ser->baud(115200);
ser->format(8);
ser->printf("Hello World\n\r");
myled = 1;
- SX1276PingPong();
+ #if( defined ( TARGET_KL25Z ) || defined ( TARGET_LPC11U6X ) )
+ DigitalOut *led = new DigitalOut(LED2);
+#elif defined(TARGET_NUCLEO_L073RZ)
+ DigitalOut *led = new DigitalOut(LED4); // RX red
+ led3 = new DigitalOut(LED3); // TX blue
+#else
+ DigitalOut *led = new DigitalOut(LED1);
+ led3 = led;
+#endif
+
+ Buffer = new uint8_t[BUFFER_SIZE];
+ *led3 = 1;
+
+#ifdef B_L072Z_LRWAN1_LORA
+ Radio = new SX1276Generic(NULL, MURATA_SX1276,
+ LORA_SPI_MOSI, LORA_SPI_MISO, LORA_SPI_SCLK, LORA_CS, LORA_RESET,
+ LORA_DIO0, LORA_DIO1, LORA_DIO2, LORA_DIO3, LORA_DIO4, LORA_DIO5,
+ LORA_ANT_RX, LORA_ANT_TX, LORA_ANT_BOOST, LORA_TCXO);
+#else // RFM95
+ Radio = new SX1276Generic(NULL, RFM95_SX1276,
+ LORA_SPI_MOSI, LORA_SPI_MISO, LORA_SPI_SCLK, LORA_CS, LORA_RESET,
+ LORA_DIO0, LORA_DIO1, LORA_DIO2, LORA_DIO3, LORA_DIO4, LORA_DIO5);
+
+#endif
+
+
+ isMaster = true;
+
+ dprintf("SX1276 Ping Pong Demo Application" );
+ dprintf("Freqency: %.1f", (double)RF_FREQUENCY/1000000.0);
+ dprintf("TXPower: %d dBm", TX_OUTPUT_POWER);
+#if USE_MODEM_LORA == 1
+ dprintf("Bandwidth: %d Hz", LORA_BANDWIDTH);
+ dprintf("Spreading factor: SF%d", LORA_SPREADING_FACTOR);
+#elif USE_MODEM_FSK == 1
+ dprintf("Bandwidth: %d kHz", FSK_BANDWIDTH);
+ dprintf("Baudrate: %d", FSK_DATARATE);
+#endif
+ // Initialize Radio driver
+ RadioEvents.TxDone = OnTxDone;
+ RadioEvents.RxDone = OnRxDone;
+ RadioEvents.RxError = OnRxError;
+ RadioEvents.TxTimeout = OnTxTimeout;
+ RadioEvents.RxTimeout = OnRxTimeout;
+ if (Radio->Init( &RadioEvents ) == false) {
+ while(1) {
+ dprintf("Radio could not be detected!");
+ wait( 1 );
+ }
+ }
+
+
+ switch(Radio->DetectBoardType()) {
+ case SX1276MB1LAS:
+ if (DEBUG_MESSAGE)
+ dprintf(" > Board Type: SX1276MB1LAS <");
+ break;
+ case SX1276MB1MAS:
+ if (DEBUG_MESSAGE)
+ dprintf(" > Board Type: SX1276MB1LAS <");
+ case MURATA_SX1276:
+ if (DEBUG_MESSAGE)
+ dprintf(" > Board Type: MURATA_SX1276_STM32L0 <");
+ break;
+ case RFM95_SX1276:
+ if (DEBUG_MESSAGE)
+ dprintf(" > HopeRF RFM95xx <");
+ break;
+ default:
+ dprintf(" > Board Type: unknown <");
+ }
+
+ Radio->SetChannel(RF_FREQUENCY );
+
+#if USE_MODEM_LORA == 1
+
+ if (LORA_FHSS_ENABLED)
+ dprintf(" > LORA FHSS Mode <");
+ if (!LORA_FHSS_ENABLED)
+ dprintf(" > LORA Mode <");
+
+ 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, 2000 );
+
+ 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
+
+ dprintf(" > FSK Mode <");
+ 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, 2000 );
+
+ 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
+
+ if (DEBUG_MESSAGE)
+ dprintf("Starting Rx loop");
+
+
+ Radio->Rx( RX_TIMEOUT_VALUE );
+ /*
+ SX1276DataTx[0] = 0x0A;
+ SX1276DataTx[1] = 0x0B;
+ SX1276DataTx[2] = 0x0C;
+ SX1276DataTx[3] = 0x0D;
+ */
+
+ while(1)
+ SX1276Comm(0, 1);
+ //SX1276PingPong();
+
+
}
@@ -118,3 +343,258 @@
}
ser->printf("--\r\n");
}
+
+
+
+
+int SX1276PingPong()
+{
+
+
+ while( 1 )
+ {
+#ifdef TARGET_STM32L4
+ WatchDogUpdate();
+#endif
+
+ switch( State )
+ {
+ case RX:
+ *led3 = 0;
+ if( isMaster == true )
+ {
+ if( BufferSize > 0 )
+ {
+ if( memcmp(Buffer, PongMsg, sizeof(PongMsg)) == 0 )
+ {
+ *led = !*led;
+ dprintf( "...Pong" );
+ // Send the next PING frame
+ memcpy(Buffer, PingMsg, sizeof(PingMsg));
+ // We fill the buffer with numbers for the payload
+ for( i = sizeof(PingMsg); i < BufferSize; i++ )
+ {
+ Buffer[i] = i - sizeof(PingMsg);
+ }
+ //wait_ms( 10 );
+ Radio->Send( Buffer, BufferSize );
+ }
+ else if( memcmp(Buffer, PingMsg, sizeof(PingMsg)) == 0 )
+ { // A master already exists then become a slave
+ dprintf( "...Ping" );
+ *led = !*led;
+ isMaster = false;
+ // Send the next PONG frame
+ memcpy(Buffer, PongMsg, sizeof(PongMsg));
+ // We fill the buffer with numbers for the payload
+ for( i = sizeof(PongMsg); i < BufferSize; i++ )
+ {
+ Buffer[i] = i - sizeof(PongMsg);
+ }
+ //wait_ms( 10 );
+ Radio->Send( Buffer, BufferSize );
+ }
+ else // valid reception but neither a PING or a PONG message
+ { // Set device as master ans start again
+ isMaster = true;
+ Radio->Rx( RX_TIMEOUT_VALUE );
+ }
+ }
+ }
+ else
+ {
+ if( BufferSize > 0 )
+ {
+ if( memcmp(Buffer, PingMsg, sizeof(PingMsg)) == 0 )
+ {
+ *led = !*led;
+ dprintf( "...Ping" );
+ // Send the reply to the PING string
+ memcpy(Buffer, PongMsg, sizeof(PongMsg));
+ // We fill the buffer with numbers for the payload
+ for( i = sizeof(PongMsg); i < BufferSize; i++ )
+ {
+ Buffer[i] = i - sizeof(PongMsg);
+ }
+ //wait_ms( 10 );
+ Radio->Send( Buffer, BufferSize );
+ }
+ else // valid reception but not a PING as expected
+ { // Set device as master and start again
+ isMaster = true;
+ Radio->Rx( RX_TIMEOUT_VALUE );
+ }
+ }
+ }
+ State = LOWPOWER;
+ break;
+ case TX:
+ *led3 = 1;
+ if( isMaster == true )
+ {
+ dprintf("Ping..." );
+ }
+ else
+ {
+ dprintf("Pong..." );
+ }
+ Radio->Rx( RX_TIMEOUT_VALUE );
+ State = LOWPOWER;
+ break;
+ case RX_TIMEOUT:
+ if( isMaster == true )
+ {
+ // Send the next PING frame
+ memcpy(Buffer, PingMsg, sizeof(PingMsg));
+ for( i = sizeof(PingMsg); i < BufferSize; i++ )
+ {
+ Buffer[i] = i - sizeof(PingMsg);
+ }
+ //wait_ms( 10 );
+ Radio->Send( Buffer, BufferSize );
+ }
+ else
+ {
+ Radio->Rx( RX_TIMEOUT_VALUE );
+ }
+ State = LOWPOWER;
+ break;
+ case RX_ERROR:
+ // We have received a Packet with a CRC error, send reply as if packet was correct
+ if( isMaster == true )
+ {
+ // Send the next PING frame
+ memcpy(Buffer, PingMsg, sizeof(PingMsg));
+ for( i = 4; i < BufferSize; i++ )
+ {
+ Buffer[i] = i - 4;
+ }
+ //wait_ms( 10 );
+ Radio->Send( Buffer, BufferSize );
+ }
+ else
+ {
+ // Send the next PONG frame
+ memcpy(Buffer, PongMsg, sizeof(PongMsg));
+ for( i = sizeof(PongMsg); i < BufferSize; i++ )
+ {
+ Buffer[i] = i - sizeof(PongMsg);
+ }
+ //wait_ms( 10 );
+ Radio->Send( Buffer, BufferSize );
+ }
+ State = LOWPOWER;
+ break;
+ case TX_TIMEOUT:
+ Radio->Rx( RX_TIMEOUT_VALUE );
+ State = LOWPOWER;
+ break;
+ case LOWPOWER:
+ sleep();
+ break;
+ default:
+ State = LOWPOWER;
+ break;
+ }
+ }
+}
+
+void OnTxDone(void *radio)
+{
+ Radio->Sleep( );
+ State = TX;
+ if (DEBUG_MESSAGE)
+ dprintf("> OnTxDone");
+}
+
+void OnRxDone(void *radio, uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr)
+{
+ Radio->Sleep( );
+ BufferSize = size;
+ memcpy( Buffer, payload, BufferSize );
+ State = RX;
+ if (DEBUG_MESSAGE)
+ dprintf("> OnRxDone: RssiValue=%d dBm, SnrValue=%d", rssi, snr);
+ //dump("Data:", payload, size);
+ //ser->printf("Rx Data ~%x%x%x%x\n", payload[0], payload[1], payload[2], payload[3]);
+ ser->printf("~%02x%02x%02x%02x\n", Buffer[0], Buffer[1], Buffer[2], Buffer[3]);
+}
+
+void OnTxTimeout(void *radio)
+{
+ *led3 = 0;
+ Radio->Sleep( );
+ State = TX_TIMEOUT;
+ if(DEBUG_MESSAGE)
+ dprintf("> OnTxTimeout");
+}
+
+void OnRxTimeout(void *radio)
+{
+ *led3 = 0;
+ Radio->Sleep( );
+ Buffer[BufferSize-1] = 0;
+ State = RX_TIMEOUT;
+ if (DEBUG_MESSAGE)
+ dprintf("> OnRxTimeout");
+}
+
+void OnRxError(void *radio)
+{
+ Radio->Sleep( );
+ State = RX_ERROR;
+ if (DEBUG_MESSAGE)
+ dprintf("> OnRxError");
+}
+
+#endif
+
+
+int SX1276Comm(bool mode, bool ack)
+{
+
+
+ Radio->Rx( RX_TIMEOUT_VALUE );
+ wait_ms(100);
+
+
+
+
+ /*switch( State ) {
+
+ case RX:
+ Radio->Rx( RX_TIMEOUT_VALUE );
+
+ //memcpy(Buffer, commData, sizeof(Buffer));
+ //ser->printf("Rx Data\n\r", Buffer[0], Buffer[1], Buffer[2], Buffer[3]);
+
+ //State = LOWPOWER;
+ break;
+ case TX:
+
+ //State = LOWPOWER;
+ break;
+ case RX_TIMEOUT:
+
+ Radio->Rx( RX_TIMEOUT_VALUE );
+ //State = LOWPOWER;
+ break;
+ case RX_ERROR:
+
+ //wait_ms(10);
+ //Radio->Rx( RX_TIMEOUT_VALUE );
+ State = LOWPOWER;
+ break;
+ case TX_TIMEOUT:
+
+ //State = LOWPOWER;
+ break;
+ case LOWPOWER:
+ sleep();
+ break;
+ default:
+ //State = LOWPOWER;
+ break;
+ }
+ */
+}