add while(!Serial) to all examples

Author: hathach

libraries/Bluefruit52Lib/examples/Hardware/SerialEcho/SerialEcho.ino

@@ -24,6 +24,7 @@ const int baudrate = 115200;
 void setup()
 {
   Serial.begin (baudrate);
+  while ( !Serial ) delay(10);   // for nrf52840 with native usb
 
   Serial.println("Serial Echo demo");
   Serial.print("Badurate : ");

libraries/Bluefruit52Lib/examples/Hardware/digital_interrupt_deferred/digital_interrupt_deferred.ino

@@ -23,6 +23,7 @@ int interruptPin = A0;
 void setup()
 {
   Serial.begin(115200);
+  while ( !Serial ) delay(10);   // for nrf52840 with native usb
 
   pinMode(interruptPin, INPUT_PULLUP);
 

libraries/SPI/examples/BarometricPressureSensor/BarometricPressureSensor.ino

@@ -39,6 +39,7 @@ const int chipSelectPin = 7;
 
 void setup() {
   Serial.begin(9600);
+  while ( !Serial ) delay(10);   // for nrf52840 with native usb
 
   // start the SPI library:
   SPI.begin();

libraries/Wire/examples/SFRRanger_reader/SFRRanger_reader.ino

@@ -16,6 +16,7 @@ void setup()
 {
   Wire.begin();                // join i2c bus (address optional for master)
   Serial.begin(9600);          // start serial communication at 9600bps
+  while ( !Serial ) delay(10);   // for nrf52840 with native usb
 }
 
 int reading = 0;

libraries/Wire/examples/master_reader/master_reader.ino

@@ -16,6 +16,7 @@ void setup()
 {
   Wire.begin();        // join i2c bus (address optional for master)
   Serial.begin(9600);  // start serial for output
+  while ( !Serial ) delay(10);   // for nrf52840 with native usb
 }
 
 void loop()

libraries/Wire/examples/slave_receiver/slave_receiver.ino

@@ -17,6 +17,7 @@ void setup()
   Wire.begin(4);                // join i2c bus with address #4
   Wire.onReceive(receiveEvent); // register event
   Serial.begin(9600);           // start serial for output
+  while ( !Serial ) delay(10);   // for nrf52840 with native usb
 }
 
 void loop()