Exercise 6 BLE UART
Dependencies: BLE_API X_NUCLEO_IDB0XA1 mbed
Fork of Amaldi_6_BLE_UART_IDB0XA1 by
BLE-UART-IDB0XA1.cpp@10:2d4a768ae727, 2018-05-12 (annotated)
- Committer:
- pinofal
- Date:
- Sat May 12 13:05:57 2018 +0000
- Revision:
- 10:2d4a768ae727
Amaldi Exercise 6
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
pinofal | 10:2d4a768ae727 | 1 | // Tested: NUCLEO-F401RE |
pinofal | 10:2d4a768ae727 | 2 | |
pinofal | 10:2d4a768ae727 | 3 | #include "mbed.h" |
pinofal | 10:2d4a768ae727 | 4 | #include "ble/BLE.h" |
pinofal | 10:2d4a768ae727 | 5 | #include "ble/services/UARTService.h" |
pinofal | 10:2d4a768ae727 | 6 | #include "Serial.h" |
pinofal | 10:2d4a768ae727 | 7 | |
pinofal | 10:2d4a768ae727 | 8 | #define UART_BUFFER (UARTService::BLE_UART_SERVICE_MAX_DATA_LEN*10) |
pinofal | 10:2d4a768ae727 | 9 | |
pinofal | 10:2d4a768ae727 | 10 | const static char DEVICE_NAME[] = "UART"; |
pinofal | 10:2d4a768ae727 | 11 | UARTService *uartServicePtr; |
pinofal | 10:2d4a768ae727 | 12 | |
pinofal | 10:2d4a768ae727 | 13 | // Periferiche |
pinofal | 10:2d4a768ae727 | 14 | DigitalOut Led1(LED1); // LED su scheda |
pinofal | 10:2d4a768ae727 | 15 | Serial pcUSB(USBTX,USBRX); // USB di comunicazione con PC |
pinofal | 10:2d4a768ae727 | 16 | DigitalOut myLED(PB_2); //LED aggiunto esternamente |
pinofal | 10:2d4a768ae727 | 17 | DigitalIn myButton(USER_BUTTON); // USER BUTTON su scheda |
pinofal | 10:2d4a768ae727 | 18 | DigitalOut myRelay(PA_15); // Relay Esterno |
pinofal | 10:2d4a768ae727 | 19 | |
pinofal | 10:2d4a768ae727 | 20 | |
pinofal | 10:2d4a768ae727 | 21 | // Array e indice di comunicazione con UART |
pinofal | 10:2d4a768ae727 | 22 | static uint8_t uartBuff[UART_BUFFER]; |
pinofal | 10:2d4a768ae727 | 23 | static uint8_t uartBuffPos=0; |
pinofal | 10:2d4a768ae727 | 24 | |
pinofal | 10:2d4a768ae727 | 25 | // routine di Error Handling |
pinofal | 10:2d4a768ae727 | 26 | void onBleError(ble_error_t error); |
pinofal | 10:2d4a768ae727 | 27 | |
pinofal | 10:2d4a768ae727 | 28 | |
pinofal | 10:2d4a768ae727 | 29 | // Ticker segnale di vita |
pinofal | 10:2d4a768ae727 | 30 | Ticker LifeTicker; |
pinofal | 10:2d4a768ae727 | 31 | |
pinofal | 10:2d4a768ae727 | 32 | |
pinofal | 10:2d4a768ae727 | 33 | |
pinofal | 10:2d4a768ae727 | 34 | /****************************************************/ |
pinofal | 10:2d4a768ae727 | 35 | /* Ticker attivo quando presente la connessione BLE */ |
pinofal | 10:2d4a768ae727 | 36 | /****************************************************/ |
pinofal | 10:2d4a768ae727 | 37 | void ConnectedBLE(void) |
pinofal | 10:2d4a768ae727 | 38 | { |
pinofal | 10:2d4a768ae727 | 39 | // segnale di vita: accende e spegne il LED |
pinofal | 10:2d4a768ae727 | 40 | Led1 = !Led1; |
pinofal | 10:2d4a768ae727 | 41 | } |
pinofal | 10:2d4a768ae727 | 42 | |
pinofal | 10:2d4a768ae727 | 43 | /************************/ |
pinofal | 10:2d4a768ae727 | 44 | /* Rx da USB e Tx a BLE */ |
pinofal | 10:2d4a768ae727 | 45 | /************************/ |
pinofal | 10:2d4a768ae727 | 46 | void uartRx(void) |
pinofal | 10:2d4a768ae727 | 47 | { |
pinofal | 10:2d4a768ae727 | 48 | // cattura i caratteri dalla USB fino alla fine del messaggio: a '\r' oppure '\n' oppure fino al raggiungimento della massima dimensione del messaggio |
pinofal | 10:2d4a768ae727 | 49 | if(pcUSB.readable()) |
pinofal | 10:2d4a768ae727 | 50 | { |
pinofal | 10:2d4a768ae727 | 51 | uartBuff[uartBuffPos] = pcUSB.getc(); |
pinofal | 10:2d4a768ae727 | 52 | if((uartBuff[uartBuffPos] == '\r') || (uartBuff[uartBuffPos] == '\n') || (uartBuffPos >= UART_BUFFER)) |
pinofal | 10:2d4a768ae727 | 53 | { |
pinofal | 10:2d4a768ae727 | 54 | // inserisce un NUL nell'ultima posizine della stringa |
pinofal | 10:2d4a768ae727 | 55 | uartBuff[uartBuffPos] = '\0'; |
pinofal | 10:2d4a768ae727 | 56 | // We are sending the whole string even if less than BLE_UART_SERVICE_MAX_DATA_LEN, otherwise we need to wait |
pinofal | 10:2d4a768ae727 | 57 | uartServicePtr->write(uartBuff, (uartBuffPos/UARTService::BLE_UART_SERVICE_MAX_DATA_LEN +1) * UARTService::BLE_UART_SERVICE_MAX_DATA_LEN); |
pinofal | 10:2d4a768ae727 | 58 | // invia conferma alla USB-PC con la stringa inviata al BLE |
pinofal | 10:2d4a768ae727 | 59 | pcUSB.printf("TX : %s to BLE\r\n", uartBuff); |
pinofal | 10:2d4a768ae727 | 60 | // resetta la stringa uartBuff inserendo 0 ai primi UART_BUFFER caratteri |
pinofal | 10:2d4a768ae727 | 61 | memset(uartBuff, 0, UART_BUFFER); |
pinofal | 10:2d4a768ae727 | 62 | uartBuffPos = 0; |
pinofal | 10:2d4a768ae727 | 63 | } |
pinofal | 10:2d4a768ae727 | 64 | else |
pinofal | 10:2d4a768ae727 | 65 | { |
pinofal | 10:2d4a768ae727 | 66 | // se non è stata raggiunta la fine del messaggio, incrementa il contatore per ricevere il prossimo carattere |
pinofal | 10:2d4a768ae727 | 67 | uartBuffPos++; |
pinofal | 10:2d4a768ae727 | 68 | } |
pinofal | 10:2d4a768ae727 | 69 | } |
pinofal | 10:2d4a768ae727 | 70 | } |
pinofal | 10:2d4a768ae727 | 71 | |
pinofal | 10:2d4a768ae727 | 72 | /*****************************************/ |
pinofal | 10:2d4a768ae727 | 73 | /* Connessione BLE avvenuta con successo */ |
pinofal | 10:2d4a768ae727 | 74 | /*****************************************/ |
pinofal | 10:2d4a768ae727 | 75 | void BleConnectionCallback(const Gap::ConnectionCallbackParams_t *params) |
pinofal | 10:2d4a768ae727 | 76 | { |
pinofal | 10:2d4a768ae727 | 77 | pcUSB.printf("BLE Client Connected!\n\r"); |
pinofal | 10:2d4a768ae727 | 78 | pcUSB.printf("Please type a string and press return\r\n"); |
pinofal | 10:2d4a768ae727 | 79 | |
pinofal | 10:2d4a768ae727 | 80 | // segnale di connessione BLE: accende/spegne il LED con periodo 1sec |
pinofal | 10:2d4a768ae727 | 81 | LifeTicker.attach(ConnectedBLE, 1); |
pinofal | 10:2d4a768ae727 | 82 | } |
pinofal | 10:2d4a768ae727 | 83 | |
pinofal | 10:2d4a768ae727 | 84 | /**********************************/ |
pinofal | 10:2d4a768ae727 | 85 | /* disconnessione del Cliente BLE */ |
pinofal | 10:2d4a768ae727 | 86 | /**********************************/ |
pinofal | 10:2d4a768ae727 | 87 | void BleDisconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) |
pinofal | 10:2d4a768ae727 | 88 | { |
pinofal | 10:2d4a768ae727 | 89 | (void)params; |
pinofal | 10:2d4a768ae727 | 90 | pcUSB.printf("BLE Client Disconnected!\r\n"); |
pinofal | 10:2d4a768ae727 | 91 | // spegne il segnale di connessione BLE: accende/spegne il LED con periodo 1sec |
pinofal | 10:2d4a768ae727 | 92 | LifeTicker.detach(); |
pinofal | 10:2d4a768ae727 | 93 | |
pinofal | 10:2d4a768ae727 | 94 | // restart advertising |
pinofal | 10:2d4a768ae727 | 95 | BLE::Instance().gap().startAdvertising(); |
pinofal | 10:2d4a768ae727 | 96 | Led1=0; |
pinofal | 10:2d4a768ae727 | 97 | } |
pinofal | 10:2d4a768ae727 | 98 | |
pinofal | 10:2d4a768ae727 | 99 | /************************/ |
pinofal | 10:2d4a768ae727 | 100 | /* Rx da BLE e Rx a USB */ |
pinofal | 10:2d4a768ae727 | 101 | /************************/ |
pinofal | 10:2d4a768ae727 | 102 | void BleOnDataWrittenCallback(const GattWriteCallbackParams *params) |
pinofal | 10:2d4a768ae727 | 103 | { |
pinofal | 10:2d4a768ae727 | 104 | // Stringa di risposta in caso di ricezione not OK |
pinofal | 10:2d4a768ae727 | 105 | #define REPLYNOTOK "Rx not Ok :(" |
pinofal | 10:2d4a768ae727 | 106 | // Stringa di risposta in caso di ricezione OK |
pinofal | 10:2d4a768ae727 | 107 | #define REPLYOK "Rx Ok :)" |
pinofal | 10:2d4a768ae727 | 108 | // Stringa di riferimento |
pinofal | 10:2d4a768ae727 | 109 | #define REFERENCESTRING "bho" |
pinofal | 10:2d4a768ae727 | 110 | |
pinofal | 10:2d4a768ae727 | 111 | char caReply[UART_BUFFER]; |
pinofal | 10:2d4a768ae727 | 112 | //uint8_t uaAux[UART_BUFFER]; |
pinofal | 10:2d4a768ae727 | 113 | int nReplyLength; |
pinofal | 10:2d4a768ae727 | 114 | |
pinofal | 10:2d4a768ae727 | 115 | //Risultato del confronto tra srtinghe |
pinofal | 10:2d4a768ae727 | 116 | int nResult; |
pinofal | 10:2d4a768ae727 | 117 | |
pinofal | 10:2d4a768ae727 | 118 | // resetta stringa ausiliaria per comporre le risposte |
pinofal | 10:2d4a768ae727 | 119 | memset(caReply, 0, UART_BUFFER); |
pinofal | 10:2d4a768ae727 | 120 | |
pinofal | 10:2d4a768ae727 | 121 | // riceve stringa da BLE |
pinofal | 10:2d4a768ae727 | 122 | if (params->handle == uartServicePtr->getTXCharacteristicHandle()) |
pinofal | 10:2d4a768ae727 | 123 | { |
pinofal | 10:2d4a768ae727 | 124 | // invia al PC la stringa ricevuta |
pinofal | 10:2d4a768ae727 | 125 | pcUSB.printf("RX: %s from BLE\r\n", params->data); |
pinofal | 10:2d4a768ae727 | 126 | |
pinofal | 10:2d4a768ae727 | 127 | //confronta la stringa ricevuta con una stringa di riferimento |
pinofal | 10:2d4a768ae727 | 128 | nResult=strcmp((char*)(params->data),REFERENCESTRING); |
pinofal | 10:2d4a768ae727 | 129 | if(nResult==0) // ==0 in caso di confronto di stringhe con esito positivo |
pinofal | 10:2d4a768ae727 | 130 | { |
pinofal | 10:2d4a768ae727 | 131 | // se la stringa ricevuta è uguale a quella di riferimento, accende LED |
pinofal | 10:2d4a768ae727 | 132 | myLED = 1; // accendi LED |
pinofal | 10:2d4a768ae727 | 133 | myRelay = 1; // accendi Relay |
pinofal | 10:2d4a768ae727 | 134 | |
pinofal | 10:2d4a768ae727 | 135 | // comunica al PC l'azione eseguita |
pinofal | 10:2d4a768ae727 | 136 | pcUSB.printf("Relay = ON ; LED = ON \r\n"); |
pinofal | 10:2d4a768ae727 | 137 | |
pinofal | 10:2d4a768ae727 | 138 | // Aggiunge NULL alla stringa di risposta OK |
pinofal | 10:2d4a768ae727 | 139 | strcpy(caReply,REPLYOK); |
pinofal | 10:2d4a768ae727 | 140 | nReplyLength = strlen(REPLYOK); |
pinofal | 10:2d4a768ae727 | 141 | caReply[nReplyLength]='\0'; |
pinofal | 10:2d4a768ae727 | 142 | |
pinofal | 10:2d4a768ae727 | 143 | // We are sending the whole string even if less than BLE_UART_SERVICE_MAX_DATA_LEN, otherwise we need to wait |
pinofal | 10:2d4a768ae727 | 144 | uartServicePtr->write(caReply, (nReplyLength/UARTService::BLE_UART_SERVICE_MAX_DATA_LEN +1) * UARTService::BLE_UART_SERVICE_MAX_DATA_LEN); |
pinofal | 10:2d4a768ae727 | 145 | } |
pinofal | 10:2d4a768ae727 | 146 | else |
pinofal | 10:2d4a768ae727 | 147 | { |
pinofal | 10:2d4a768ae727 | 148 | // se la stringa ricevuta è uguale a quella di riferimento, spegne LED |
pinofal | 10:2d4a768ae727 | 149 | myLED = 0; // spegni LED |
pinofal | 10:2d4a768ae727 | 150 | myRelay = 0; // spegni Relay |
pinofal | 10:2d4a768ae727 | 151 | |
pinofal | 10:2d4a768ae727 | 152 | // comunica al PC l'azione eseguita |
pinofal | 10:2d4a768ae727 | 153 | pcUSB.printf("Relay = OFF ; LED = OFF \r\n"); |
pinofal | 10:2d4a768ae727 | 154 | |
pinofal | 10:2d4a768ae727 | 155 | // Aggiunge NULL alla stringa di risposta NOT OK |
pinofal | 10:2d4a768ae727 | 156 | strcpy(caReply,REPLYNOTOK); |
pinofal | 10:2d4a768ae727 | 157 | nReplyLength = strlen(REPLYNOTOK); |
pinofal | 10:2d4a768ae727 | 158 | caReply[nReplyLength]='\0'; |
pinofal | 10:2d4a768ae727 | 159 | |
pinofal | 10:2d4a768ae727 | 160 | // We are sending the whole string even if less than BLE_UART_SERVICE_MAX_DATA_LEN, otherwise we need to wait |
pinofal | 10:2d4a768ae727 | 161 | uartServicePtr->write(caReply, (nReplyLength/UARTService::BLE_UART_SERVICE_MAX_DATA_LEN +1) * UARTService::BLE_UART_SERVICE_MAX_DATA_LEN); |
pinofal | 10:2d4a768ae727 | 162 | |
pinofal | 10:2d4a768ae727 | 163 | } |
pinofal | 10:2d4a768ae727 | 164 | // !!! PROVARE A INSERIRE IL CASE OF DELL'ESERCIZIO 5 |
pinofal | 10:2d4a768ae727 | 165 | // !!!!! PROVARE in questo punto a inviare un feedback al BLE !!!!!!! |
pinofal | 10:2d4a768ae727 | 166 | // !!!! uartServicePtr->write(uartBuff, (uartBuffPos/UARTService::BLE_UART_SERVICE_MAX_DATA_LEN +1) * UARTService::BLE_UART_SERVICE_MAX_DATA_LEN); |
pinofal | 10:2d4a768ae727 | 167 | |
pinofal | 10:2d4a768ae727 | 168 | } |
pinofal | 10:2d4a768ae727 | 169 | } |
pinofal | 10:2d4a768ae727 | 170 | |
pinofal | 10:2d4a768ae727 | 171 | /************************/ |
pinofal | 10:2d4a768ae727 | 172 | /* Errore su canale BLE */ |
pinofal | 10:2d4a768ae727 | 173 | /************************/ |
pinofal | 10:2d4a768ae727 | 174 | void onBleError(ble_error_t error) |
pinofal | 10:2d4a768ae727 | 175 | { |
pinofal | 10:2d4a768ae727 | 176 | pcUSB.printf("BLE Error: %d\r\n"); |
pinofal | 10:2d4a768ae727 | 177 | /* Inserire Handling di errore */ |
pinofal | 10:2d4a768ae727 | 178 | } |
pinofal | 10:2d4a768ae727 | 179 | |
pinofal | 10:2d4a768ae727 | 180 | /******************************************/ |
pinofal | 10:2d4a768ae727 | 181 | /* Inizializzazione del servizio BLE UART */ |
pinofal | 10:2d4a768ae727 | 182 | /******************************************/ |
pinofal | 10:2d4a768ae727 | 183 | void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) |
pinofal | 10:2d4a768ae727 | 184 | { |
pinofal | 10:2d4a768ae727 | 185 | BLE& ble = params->ble; |
pinofal | 10:2d4a768ae727 | 186 | ble_error_t error = params->error; |
pinofal | 10:2d4a768ae727 | 187 | |
pinofal | 10:2d4a768ae727 | 188 | if (error != BLE_ERROR_NONE) |
pinofal | 10:2d4a768ae727 | 189 | { |
pinofal | 10:2d4a768ae727 | 190 | /* In case of error, forward the error handling to onBleInitError */ |
pinofal | 10:2d4a768ae727 | 191 | onBleError(error); |
pinofal | 10:2d4a768ae727 | 192 | return; |
pinofal | 10:2d4a768ae727 | 193 | } |
pinofal | 10:2d4a768ae727 | 194 | |
pinofal | 10:2d4a768ae727 | 195 | /* Ensure that it is the default instance of BLE */ |
pinofal | 10:2d4a768ae727 | 196 | if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) |
pinofal | 10:2d4a768ae727 | 197 | { |
pinofal | 10:2d4a768ae727 | 198 | return; |
pinofal | 10:2d4a768ae727 | 199 | } |
pinofal | 10:2d4a768ae727 | 200 | |
pinofal | 10:2d4a768ae727 | 201 | ble.gap().onConnection(BleConnectionCallback); |
pinofal | 10:2d4a768ae727 | 202 | ble.gap().onDisconnection(BleDisconnectionCallback); |
pinofal | 10:2d4a768ae727 | 203 | ble.gattServer().onDataWritten(BleOnDataWrittenCallback); |
pinofal | 10:2d4a768ae727 | 204 | |
pinofal | 10:2d4a768ae727 | 205 | pcUSB.printf("BLE UARTService: "); |
pinofal | 10:2d4a768ae727 | 206 | /* Setup primary service. */ |
pinofal | 10:2d4a768ae727 | 207 | UARTService uartService(ble); |
pinofal | 10:2d4a768ae727 | 208 | uartServicePtr = &uartService; |
pinofal | 10:2d4a768ae727 | 209 | pcUSB.printf("Started\r\n"); |
pinofal | 10:2d4a768ae727 | 210 | |
pinofal | 10:2d4a768ae727 | 211 | /* setup advertising */ |
pinofal | 10:2d4a768ae727 | 212 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); |
pinofal | 10:2d4a768ae727 | 213 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed)); |
pinofal | 10:2d4a768ae727 | 214 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); |
pinofal | 10:2d4a768ae727 | 215 | ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); |
pinofal | 10:2d4a768ae727 | 216 | ble.gap().setAdvertisingInterval(500); /* 500ms. */ |
pinofal | 10:2d4a768ae727 | 217 | ble.gap().startAdvertising(); |
pinofal | 10:2d4a768ae727 | 218 | |
pinofal | 10:2d4a768ae727 | 219 | // rimane in attesa di eventi su BLE |
pinofal | 10:2d4a768ae727 | 220 | while (true) |
pinofal | 10:2d4a768ae727 | 221 | { |
pinofal | 10:2d4a768ae727 | 222 | ble.waitForEvent(); |
pinofal | 10:2d4a768ae727 | 223 | } |
pinofal | 10:2d4a768ae727 | 224 | } |
pinofal | 10:2d4a768ae727 | 225 | |
pinofal | 10:2d4a768ae727 | 226 | /********/ |
pinofal | 10:2d4a768ae727 | 227 | /* MAIN */ |
pinofal | 10:2d4a768ae727 | 228 | /********/ |
pinofal | 10:2d4a768ae727 | 229 | int main(void) |
pinofal | 10:2d4a768ae727 | 230 | { |
pinofal | 10:2d4a768ae727 | 231 | |
pinofal | 10:2d4a768ae727 | 232 | // configura velocità della comunicazione seriale su USB-VirtualCom e invia messaggio di benvenuto |
pinofal | 10:2d4a768ae727 | 233 | pcUSB.baud(9600); //921600 bps |
pinofal | 10:2d4a768ae727 | 234 | // messaggio di benvenuto |
pinofal | 10:2d4a768ae727 | 235 | pcUSB.printf("\r\nHallo Amaldi Students - Exercise 6 \r\n"); |
pinofal | 10:2d4a768ae727 | 236 | pcUSB.printf("\r\n*** Bluetooth - PC serial communication ***\r\n"); |
pinofal | 10:2d4a768ae727 | 237 | |
pinofal | 10:2d4a768ae727 | 238 | //imposta il funzionamento del pulsante come "PullDown": Aperto = '0'. L'altra modalità di funzinamento è PullUp |
pinofal | 10:2d4a768ae727 | 239 | myButton.mode(PullDown); |
pinofal | 10:2d4a768ae727 | 240 | // inizializza variabili |
pinofal | 10:2d4a768ae727 | 241 | Led1=0; |
pinofal | 10:2d4a768ae727 | 242 | |
pinofal | 10:2d4a768ae727 | 243 | |
pinofal | 10:2d4a768ae727 | 244 | |
pinofal | 10:2d4a768ae727 | 245 | // IRQ associata alla ricezione di caratteri da seriale su USB da PC |
pinofal | 10:2d4a768ae727 | 246 | pcUSB.attach(uartRx,Serial::RxIrq); |
pinofal | 10:2d4a768ae727 | 247 | |
pinofal | 10:2d4a768ae727 | 248 | /****** START Inizializza BLE **********/ |
pinofal | 10:2d4a768ae727 | 249 | BLE &ble = BLE::Instance(); |
pinofal | 10:2d4a768ae727 | 250 | ble.init(bleInitComplete); |
pinofal | 10:2d4a768ae727 | 251 | /******* END Inizializza BLE ***********/ |
pinofal | 10:2d4a768ae727 | 252 | } |
pinofal | 10:2d4a768ae727 | 253 |