Initial support for RP2040

examples/arduino-blink/src/main.cpp

@@ -0,0 +1,15 @@
+#include <Arduino.h>
+
+// the setup routine runs once when you press reset:
+void setup() {
+  // initialize the digital pin as an output.
+  pinMode(LED_BUILTIN, OUTPUT);
+}
+
+// the loop routine runs over and over again forever:
+void loop() {
+  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
+  delay(1000);               // wait for a second
+  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
+  delay(1000);               // wait for a second
+}