Ward Mattar
This is code is part of a Technion course project in advanced IoT, implementing a device to read and transmit sensors data from a Formula racing car built by students at Technion - Israel Institute of Technology.
Fork of
DISCO-L072CZ-LRWAN1_LoRa_PingPong
by 
ST
This is code is part of a Technion course project in advanced IoT, implementing a device to read and transmit sensors data from a Formula racing car built by students at Technion - Israel Institute of Technology.
How to install
- Create an account on Mbed: https://os.mbed.com/account/signup/
- Import project into Compiler
- In the Program Workspace select "Formula_Nucleo_Reader"
- Select a Platform like so:
- Click button at top-left
- Add Board
- Search "B-L072Z-LRWAN1" and then "Add to your Mbed Compiler"
- Finally click "Compile", if the build was successful, the binary would download automatically
- To install it on device simply plug it in to a PC, open device drive and drag then drop binary file in it
Diff: Transmitter/Transmitter.cpp
- Revision:
- 12:02d779e8c4f6
diff -r 9d7409ebfa57 -r 02d779e8c4f6 Transmitter/Transmitter.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Transmitter/Transmitter.cpp Sat May 19 11:41:10 2018 +0000
@@ -0,0 +1,230 @@
+#include "mbed.h"
+#include "PinMap.h"
+#include "main.h"
+#include "sx1276-mbed-hal.h"
+
+
+#ifdef FEATURE_LORA
+
+/* Set this flag to '1' to display debug messages on the console */
+#define DEBUG_MESSAGE 1
+
+/* 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 RF_FREQUENCY_868_1 // Hz
+#define TX_OUTPUT_POWER 14 // 14 dBm
+
+#if USE_MODEM_LORA == 1
+
+#define LORA_BANDWIDTH 125000 // LoRa default, details in SX1276::BandwidthMap
+#define LORA_SPREADING_FACTOR LORA_SF7
+#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 BUFFER_SIZE 2048
+
+/*
+ * 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;
+
+uint16_t BufferSize = BUFFER_SIZE;
+uint8_t Buffer[BUFFER_SIZE];
+
+DigitalOut *led3;
+
+BufferedSerial *serial;
+int Transmitter()
+{
+#if( defined ( TARGET_KL25Z ) || defined ( TARGET_LPC11U6X ) )
+ DigitalOut *led = new DigitalOut(LED2);
+#elif defined(TARGET_NUCLEO_L073RZ) || defined(TARGET_DISCO_L072CZ_LRWAN1)
+ DigitalOut *led = new DigitalOut(LED4); // RX red
+ led3 = new DigitalOut(LED3); // TX blue
+#else
+ DigitalOut *led = new DigitalOut(LED1);
+ led3 = led;
+#endif
+
+////////////////////////////////////////////////////////////////
+ *led3 = 1;
+
+ serial = new BufferedSerial(USBTX,USBRX);
+ serial->baud(115200*2);
+ serial->format(8);
+
+////////////////////////////////////////////////////////////////
+ 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);
+
+ // Initialize Radio driver
+ RadioEvents.TxDone = OnTxDone;
+ RadioEvents.RxDone = OnRxDone;
+ RadioEvents.RxError = OnRxError;
+ RadioEvents.TxTimeout = OnTxTimeout;
+ RadioEvents.RxTimeout = OnRxTimeout;
+ if (Radio->Init( &RadioEvents ) == false) {
+ while(Radio->Init( &RadioEvents ) == false) {
+ serial->printf("Radio could not be detected!");
+ wait( 1 );
+ }
+ }
+
+
+
+
+ Radio->SetChannel(RF_FREQUENCY );
+
+
+ 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 );
+
+ while( 1 ) {
+#ifdef TARGET_STM32L4
+ WatchDogUpdate();
+#endif
+
+ switch( State ) {
+ case TX:
+ State = LOWPOWER;
+ break;
+ case RX_TIMEOUT:
+ State = LOWPOWER;
+ break;
+ case RX_ERROR:
+ State = LOWPOWER;
+ break;
+ case TX_TIMEOUT:
+ State = LOWPOWER;
+ break;
+ case LOWPOWER:
+ // going to send" );
+ int sendSize = 0;
+ serial->printf("reached lowpower\n");
+ int i = 0;
+ while(i < BufferSize) {
+ char temp;
+ while(!serial->readable()) ;
+ temp = serial->getc();
+ if(temp == '\n') break;
+ Buffer[i++] = temp;
+ sendSize++;
+ }
+
+ Buffer[i++] = '\n';
+ Buffer[i++] = 0;
+
+ sendSize++;
+ sendSize++;
+
+ serial->printf("Sending: %s", Buffer);
+ Radio->Send( Buffer, sendSize);
+ wait(0.5);
+ *led3 = !*led3 ;
+ break;
+ default:
+ State = LOWPOWER;
+ break;
+ }
+ }
+}
+
+void OnTxDone(void *radio, void *userThisPtr, void *userData)
+{
+ Radio->Sleep( );
+ State = TX;
+ if (DEBUG_MESSAGE)
+ serial->printf("> OnTxDone [7]");
+}
+
+void OnRxDone(void *radio, void *userThisPtr, void *userData, uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr)
+{
+ Radio->Sleep( );
+ BufferSize = size;
+ memcpy( Buffer, payload, BufferSize );
+ State = LOWPOWER;
+ //if (DEBUG_MESSAGE)
+// dprintf("> OnRxDone: RssiValue=%d dBm, SnrValue=%d", rssi, snr);
+ //dump("Data:", payload, size);
+}
+
+void OnTxTimeout(void *radio, void *userThisPtr, void *userData)
+{
+ *led3 = 0;
+ Radio->Sleep( );
+ State = LOWPOWER;
+ //if(DEBUG_MESSAGE)
+// serial->printf("> OnTxTimeout [8] ");
+}
+
+void OnRxTimeout(void *radio, void *userThisPtr, void *userData)
+{
+ *led3 = 0;
+ Radio->Sleep( );
+ State = LOWPOWER;
+ if (DEBUG_MESSAGE)
+ dprintf("> OnRxTimeout [9] ");
+}
+
+void OnRxError(void *radio, void *userThisPtr, void *userData)
+{
+ Radio->Sleep( );
+ State = LOWPOWER;
+ if (DEBUG_MESSAGE)
+ dprintf("> OnRxError [100] ");
+}
+
+#endif