Add SerialDemo.ino in a modified directory structure.

Author: jit89

examples/SerialDemo/SerialDemo.ino

@@ -0,0 +1,52 @@
+#include <PicoTimer.h>
+
+// --- Callbacks ---
+
+void alarmCallback() {
+  Serial.println("--- ALARM: One-shot triggered! I am now stopped. ---");
+}
+
+void heartbeatCallback() {
+  static uint32_t count = 0;
+  Serial.print("HEARTBEAT: ");
+  Serial.println(++count);
+}
+
+void burstCallback() {
+  static uint32_t pulses = 0;
+  Serial.print("BURST: Pulse ");
+  Serial.println(++pulses);
+}
+
+// --- Timer Instances ---
+
+// 1. One-shot: Runs once after 5 seconds (5000ms)
+MillisTimer alarm(5000, alarmCallback, 1);
+
+// 2. Infinite: Runs every 1 second (1,000,000 microseconds)
+MicrosTimer heartbeat(1000000, heartbeatCallback, 0);
+
+// 3. Finite: Runs exactly 10 times, every 200ms
+MillisTimer burst(200, burstCallback, 10);
+
+void setup() {
+  Serial.begin(115200);
+  while (!Serial) delay(10); // Wait for Serial on Pico
+  
+  Serial.println("PicoTimer Serial Demo Started");
+  Serial.println("-----------------------------");
+}
+
+void loop() {
+  // Always call update() in the loop for every timer
+  alarm.update();
+  heartbeat.update();
+  burst.update();
+
+  // Logic to restart the burst if it finishes
+  if (!burst.isRunning()) {
+    delay(2000);
+    Serial.println("Restarting burst timer...");
+    burst.reset();
+  }
+}