Steven Osborn / Mbed 2 deprecated LoDev_RXTX

Basic RX/TX example, this is the firmware that LoDev S76S comes with initially.

Dependencies:   mbed SX1276RonothLib

LoDev RX/TX Example

Transmit

By default LoDev comes on in receive mode. To switch to transmit mode, connect PC2 to 3.3v and press the reset switch. In TX mode the blue LED is normally off and blinks on briefly when transmitting.

Receive

When in RX mode the LED is normally on and turns off briefly when receiving a packet. This is the default mode.

main.cpp@3:80e4a46e676c, 2019-07-15 (annotated)

Committer:
steve918
Date:
Mon Jul 15 22:07:41 2019 +0000
Revision:
3:80e4a46e676c
Parent:
2:a93ffb29a2d2 
update readme;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
steve918 0:5acc19265529 1 #include "mbed.h"
steve918 0:5acc19265529 2 #include "config.h"
steve918 0:5acc19265529 3 #include "sx1276-mbed-hal.h"
steve918 0:5acc19265529 4 #include "main.h"
steve918 0:5acc19265529 5
steve918 0:5acc19265529 6 // Override stdout to use our serial port
steve918 0:5acc19265529 7 FileHandle* mbed::mbed_override_console(int fd) {
steve918 0:5acc19265529 8 static UARTSerial pc(PA_9, PA_10, 115200);
steve918 0:5acc19265529 9 return &pc;
steve918 0:5acc19265529 10 }
steve918 0:5acc19265529 11
steve918 0:5acc19265529 12
steve918 0:5acc19265529 13 static RadioEvents_t RadioEvents;
steve918 0:5acc19265529 14
steve918 0:5acc19265529 15 SX1276Generic *Radio;
steve918 0:5acc19265529 16 DigitalOut blueLed = DigitalOut(LED);
steve918 0:5acc19265529 17
steve918 0:5acc19265529 18 // NOTE: By default the sample application is in recieve mode.
steve918 0:5acc19265529 19 // Connect PIN PC_2 to 3.3v to transmit
steve918 2:a93ffb29a2d2 20 DigitalIn txModeIndicator = DigitalIn(TX_IND, PullDown);
steve918 0:5acc19265529 21
steve918 0:5acc19265529 22 int timeoutCount, errCount, recvCount = 0;
steve918 0:5acc19265529 23
steve918 0:5acc19265529 24 int main()
steve918 0:5acc19265529 25 {
steve918 0:5acc19265529 26
steve918 0:5acc19265529 27 blueLed = 1;
steve918 0:5acc19265529 28
steve918 0:5acc19265529 29 Radio = new SX1276Generic(NULL, RFM95_SX1276,
steve918 0:5acc19265529 30 LORA_SPI_MOSI, LORA_SPI_MISO, LORA_SPI_SCLK, LORA_CS, LORA_RESET,
steve918 0:5acc19265529 31 LORA_DIO0, LORA_DIO1, LORA_DIO2, LORA_DIO3, LORA_DIO4, LORA_DIO5);
steve918 0:5acc19265529 32
steve918 0:5acc19265529 33 printf("LoDev RX/TX Demo Application\n" );
steve918 0:5acc19265529 34 printf("Freqency: %.1f\n", (double)RF_FREQUENCY/1000000.0);
steve918 0:5acc19265529 35 printf("TXPower: %d dBm\n", TX_OUTPUT_POWER);
steve918 0:5acc19265529 36 printf("Bandwidth: %d Hz\n", LORA_BANDWIDTH);
steve918 0:5acc19265529 37 printf("Spreading factor: SF%d\n", LORA_SPREADING_FACTOR);
steve918 0:5acc19265529 38
steve918 0:5acc19265529 39 // Initialize Radio driver
steve918 0:5acc19265529 40 RadioEvents.TxDone = OnTxDone;
steve918 0:5acc19265529 41 RadioEvents.RxDone = OnRxDone;
steve918 0:5acc19265529 42 RadioEvents.RxError = OnRxError;
steve918 0:5acc19265529 43 RadioEvents.TxTimeout = OnTxTimeout;
steve918 0:5acc19265529 44 RadioEvents.RxTimeout = OnRxTimeout;
steve918 0:5acc19265529 45 if (Radio->Init( &RadioEvents ) == false) {
steve918 0:5acc19265529 46 while(1) {
steve918 0:5acc19265529 47 printf("Radio could not be detected!\n");
steve918 0:5acc19265529 48 wait( 1 );
steve918 0:5acc19265529 49 }
steve918 0:5acc19265529 50 }
steve918 0:5acc19265529 51
steve918 0:5acc19265529 52 Radio->DetectBoardType();
steve918 0:5acc19265529 53 Radio->SetChannel(RF_FREQUENCY );
steve918 0:5acc19265529 54
steve918 0:5acc19265529 55 Radio->SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
steve918 0:5acc19265529 56 LORA_SPREADING_FACTOR, LORA_CODINGRATE,
steve918 0:5acc19265529 57 LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
steve918 0:5acc19265529 58 LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP,
steve918 0:5acc19265529 59 LORA_IQ_INVERSION_ON, 2000 );
steve918 0:5acc19265529 60
steve918 0:5acc19265529 61 Radio->SetRxConfig( MODEM_LORA, LORA_BANDWIDTH, LORA_SPREADING_FACTOR,
steve918 0:5acc19265529 62 LORA_CODINGRATE, 0, LORA_PREAMBLE_LENGTH,
steve918 0:5acc19265529 63 LORA_SYMBOL_TIMEOUT, LORA_FIX_LENGTH_PAYLOAD_ON, 0,
steve918 0:5acc19265529 64 LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP,
steve918 0:5acc19265529 65 LORA_IQ_INVERSION_ON, true );
steve918 0:5acc19265529 66
steve918 0:5acc19265529 67 printf("Starting loop\n");
steve918 0:5acc19265529 68
steve918 0:5acc19265529 69 uint16_t frameCount = 0;
steve918 0:5acc19265529 70 char buffer[18];
steve918 0:5acc19265529 71
steve918 0:5acc19265529 72 bool txMode = false;
steve918 0:5acc19265529 73 if(txModeIndicator == 1) {
steve918 0:5acc19265529 74 // Transmit
steve918 0:5acc19265529 75 txMode = true;
steve918 0:5acc19265529 76 } else {
steve918 0:5acc19265529 77 Radio->Rx(0);
steve918 0:5acc19265529 78 }
steve918 0:5acc19265529 79
steve918 0:5acc19265529 80 while( 1 )
steve918 0:5acc19265529 81 {
steve918 0:5acc19265529 82 blueLed = 1;
steve918 0:5acc19265529 83 if(txMode) {
steve918 0:5acc19265529 84 wait_ms(5000);
steve918 0:5acc19265529 85 sprintf(buffer, "%u Hello World", frameCount);
steve918 0:5acc19265529 86 printf("Sending packet: %s\n", buffer);
steve918 0:5acc19265529 87 Radio->Send( buffer, strlen(buffer) );
steve918 0:5acc19265529 88 frameCount++;
steve918 0:5acc19265529 89 } else {
steve918 0:5acc19265529 90 wait_ms(100);
steve918 0:5acc19265529 91 }
steve918 0:5acc19265529 92
steve918 0:5acc19265529 93 }
steve918 0:5acc19265529 94 }
steve918 0:5acc19265529 95
steve918 0:5acc19265529 96 void OnTxDone(void *radio, void *userThisPtr, void *userData)
steve918 0:5acc19265529 97 {
steve918 0:5acc19265529 98 Radio->Sleep( );
steve918 0:5acc19265529 99 blueLed = 0;
steve918 0:5acc19265529 100 printf("> OnTxDone\n");
steve918 0:5acc19265529 101 }
steve918 0:5acc19265529 102
steve918 0:5acc19265529 103 void OnRxDone(void *radio, void *userThisPtr, void *userData, uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr)
steve918 0:5acc19265529 104 {
steve918 0:5acc19265529 105 Radio->Sleep( );
steve918 0:5acc19265529 106 blueLed = 0;
steve918 0:5acc19265529 107 recvCount++;
steve918 0:5acc19265529 108 printf("Status: Recv=%d, Error=%d, Timeout=%d\n", recvCount, errCount, timeoutCount);
steve918 0:5acc19265529 109 printf("> OnRxDone: RssiValue=%d dBm, SnrValue=%d\n", rssi, snr);
steve918 0:5acc19265529 110 printf("Data[%d]: %.*s\n", size, size, payload);
steve918 0:5acc19265529 111 Radio->Rx(0);
steve918 0:5acc19265529 112 }
steve918 0:5acc19265529 113
steve918 0:5acc19265529 114 void OnTxTimeout(void *radio, void *userThisPtr, void *userData)
steve918 0:5acc19265529 115 {
steve918 0:5acc19265529 116 Radio->Sleep( );
steve918 0:5acc19265529 117 blueLed = 0;
steve918 0:5acc19265529 118 printf("> OnTxTimeout\n");
steve918 0:5acc19265529 119 }
steve918 0:5acc19265529 120
steve918 0:5acc19265529 121 void OnRxTimeout(void *radio, void *userThisPtr, void *userData)
steve918 0:5acc19265529 122 {
steve918 0:5acc19265529 123 Radio->Sleep( );
steve918 0:5acc19265529 124 blueLed = 0;
steve918 0:5acc19265529 125 printf("> OnRxTimeout\n");
steve918 0:5acc19265529 126 timeoutCount++;
steve918 0:5acc19265529 127 blueLed = 0;
steve918 0:5acc19265529 128 Radio->Rx(0);
steve918 0:5acc19265529 129 }
steve918 0:5acc19265529 130
steve918 0:5acc19265529 131 void OnRxError(void *radio, void *userThisPtr, void *userData)
steve918 0:5acc19265529 132 {
steve918 0:5acc19265529 133 Radio->Sleep( );
steve918 0:5acc19265529 134 printf("> OnRxError\n");
steve918 0:5acc19265529 135 errCount++;
steve918 0:5acc19265529 136 blueLed = 0;
steve918 0:5acc19265529 137 Radio->Rx(0);
steve918 0:5acc19265529 138 }