Add Picozmo embedded app.

Author: Dave 'Gizmo' Gymer

.gitignore

@@ -354,3 +354,4 @@ simconnect.dll
 /Controlzmo/wwwroot/js/nosleep/
 /Controlzmo/wwwroot/js/signalr/
 /Controlzmo/wwwroot/js/jqueryui/
+/Picozmo/{RPI-RP2}.lnk

Picozmo/Picozmo.ino

@@ -0,0 +1,42 @@
+// https://www.arduino.cc/reference/en/
+
+const uint LED_PIN = PICO_DEFAULT_LED_PIN;
+const uint SWITCH1_PIN = D14;
+const uint SWITCH2_PIN = D15;
+
+volatile int s1, s2, pot, incoming;
+
+void setup() {
+  pinMode(LED_PIN, OUTPUT);
+  pinMode(SWITCH1_PIN, INPUT_PULLUP);
+  pinMode(SWITCH2_PIN, INPUT_PULLUP);
+}
+
+void loop() {
+  pot = analogRead(A0);
+  s1 = digitalRead(SWITCH1_PIN) == LOW;
+  s2 = digitalRead(SWITCH2_PIN) == LOW;
+  if (incoming != -1) {
+    digitalWrite(LED_PIN, (incoming & 1) ? HIGH : LOW);
+    incoming = -1;
+  }
+  sleep_ms(5);
+}
+
+void setup1() {
+  // https://www.arduino.cc/reference/en/language/functions/communication/serial/ifserial/
+  Serial.begin(115200);
+  Serial.println("setup");
+}
+
+void loop1() {
+  sleep_ms(500);
+  incoming = Serial.read();
+  Serial.print(pot);
+  Serial.print("\t");
+  Serial.print(s1);
+  Serial.print("/");
+  Serial.print(s2);
+  Serial.print(" read ");
+  Serial.println(incoming);
+}