Merge pull request #371 from LightningStalker/master

Update BlinkNcount.ino to use LED_BUILTIN rather than a pin number (which is specific to one board).
Note. LED_BUILTIN needs to be defined for some variants where its missing

STM32F1/libraries/A_STM32_Examples/examples/General/BlinkNcount/BlinkNcount.ino

@@ -9,27 +9,27 @@
 int n = 0;
 
 
-void setup() {                
+void setup() {
   // initialize the digital pin as an output.
-  pinMode(33, OUTPUT);
+  pinMode(LED_BUILTIN, OUTPUT);
   // Initialize virtual COM over USB on Maple Mini
   Serial.begin(9600);  // BAUD has no effect on USB serial: placeholder for physical UART
   // wait for serial monitor to be connected.
   while (!Serial)
   {
-    digitalWrite(33,!digitalRead(33));// Turn the LED from off to on, or on to off
+    digitalWrite(LED_BUILTIN,!digitalRead(LED_BUILTIN)); // Turn the LED from off to on, or on to off
     delay(100);         // fast blink
   }
   Serial.println("Blink LED & count Demo");
 }
 
 void loop() {
-  digitalWrite(33, HIGH);   // set the LED on
+  digitalWrite(LED_BUILTIN, HIGH);   // set the LED on
   delay(500);              // wait for a second
-  digitalWrite(33, LOW);    // set the LED off
+  digitalWrite(LED_BUILTIN, LOW);    // set the LED off
   Serial.print("Loop #: ");
   n++;
   Serial.println(n);
-   
-  delay(500);              // wait 
+
+  delay(500);              // wait
 }

STM32F1/variants/generic_stm32f103c/variant.h

@@ -19,4 +19,4 @@ static const uint8_t SCK  = BOARD_SPI1_SCK_PIN;
 
 #define LED_BUILTIN PC13
 
-#endif /* _VARIANT_ARDUINO_STM32_ */
+#endif /* _VARIANT_ARDUINO_STM32_ */