Ward Mattar / Mbed 2 deprecated Formula_LoRa_Receiver

This is code is part of a Technion course project in advanced IoT, implementing a device to receive and present sensors data from a Formula racing car built by students at Technion - Israel Institute of Technology.

Dependencies:   mbed Buffer

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 receive sensors data from another L072CZ-LRWAN1 installed on a Formula racing car (built by students at Technion - Israel Institute of Technology), and sends it to a GUI presenting the data (GUI project: github.com/ward-mattar/TechnionFormulaGUI).

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_Receiver"
  • Select a Platform like so:
  1. Click button at top-left
  2. Add Board
  3. Search "NUCLEO F103RB" 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: Receiver/Receiver.cpp

Revision:
12:046346a16ff4
diff -r 9d7409ebfa57 -r 046346a16ff4 Receiver/Receiver.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Receiver/Receiver.cpp	Sat May 19 15:42:38 2018 +0000
@@ -0,0 +1,288 @@
+/*
+ * This file contains a copy of the master content sx1276PingPong
+ * with adaption for the SX1276Generic environment
+ * (c) 2017 Helmut Tschemernjak
+ * 30826 Garbsen (Hannover) Germany
+ */
+ 
+#include "mbed.h"
+#include "PinMap.h"
+#include "Receiver.h"
+#include "sx1276-mbed-hal.h"
+#include "main.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 RX_TIMEOUT_VALUE    3500	// in ms
+
+#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;
+
+DigitalOut *led3;
+
+
+int Receiver() 
+{
+#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
+    
+    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
+    
+    uint8_t i;
+   
+    bool isMaster = false;
+
+    dprintf("Formula Technion GUI 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
+     
+        
+    Radio->Rx( RX_TIMEOUT_VALUE );
+    while( 1 )
+    {
+#ifdef TARGET_STM32L4
+        WatchDogUpdate();
+#endif
+	
+        switch( State )
+        {
+        case RX:
+        	dprintf("SWITCH:::: RX \n");
+        	*led3 = 0;
+            *led = !*led;
+            wait_ms( 10 );  
+            ///////////////////////////////
+            State = LOWPOWER;
+            break;
+          case RX_TIMEOUT:
+                
+            State = LOWPOWER;
+            dprintf("SWTICH : RX_TIMEOUT");
+            break;
+        case RX_ERROR:
+            // We have received a Packet with a CRC error, send reply as if packet was correct
+            State = LOWPOWER;
+            dprintf("SWTICH : RX_ERROR");
+            break;
+        case LOWPOWER:
+       		 dprintf("LOWPOWER, wait for input");
+       		 wait(1);
+        	Radio->Rx( RX_TIMEOUT_VALUE );  
+            break;
+        default:
+        	dprintf("SWTICH : defualt");
+            State = LOWPOWER;
+            break;
+        }    
+    }
+}
+
+void OnTxDone(void *radio, void *userThisPtr, void *userData)
+{
+    if (DEBUG_MESSAGE)
+        dprintf("> 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 = RX;
+    Buffer[500] = 0;
+    dprintf("%s", Buffer);
+}
+
+void OnTxTimeout(void *radio, void *userThisPtr, void *userData)
+{
+    *led3 = 0;
+    Radio->Sleep( );
+    State = LOWPOWER;
+}
+
+void OnRxTimeout(void *radio, void *userThisPtr, void *userData)
+{
+    *led3 = 0;
+    Radio->Sleep( );
+    Buffer[BufferSize-1] = 0;
+    State = RX_TIMEOUT;
+}
+
+void OnRxError(void *radio, void *userThisPtr, void *userData)
+{
+    Radio->Sleep( );
+    State = RX_ERROR;
+}
+
+#endif