Fixed flush function to clear incoming data (#52)

* Fixed flush function to clear incoming data

* Added flush function to remove any character that may be present from previous attempts

Author: chiararuggeri

cores/arduino/Uart.cpp

@@ -85,6 +85,7 @@ void Uart::end()
 void Uart::flush()
 {
 	nrf_uarte_task_trigger(NRF_UARTE0, NRF_UARTE_TASK_STARTTX);
+	rxBuffer.clear();
 }
 
 void Uart::IrqHandler()

libraries/BLE/examples/Central/Bonding/enterPasskeyCentral/enterPasskeyCentral.ino

@@ -114,6 +114,7 @@ void writePasskey(BLEPeripheralPeer& peer) {
   int i=0;
   int j=0;
   Serial.println("Type the 6 digits code you see on the other device");
+  Serial.flush();
   while(i < 6){
     j=Serial.available();
       for(int k=0; k<j; k++){

libraries/BLE/examples/Peripheral/Bonding/enterPasskey/enterPasskey.ino

@@ -74,6 +74,7 @@ void writePasskey(BLECentral& central) {
   int i=0;
   int j=0;
   Serial.println("Type the 6 digits code you see on the other device");
+  Serial.flush();
   while(i < 6){
     j=Serial.available();
       for(int k=0; k<j; k++){