Add first draft of binary counter

BinaryCounter/BinaryCounter.ino

+/* BinaryCounter.ino
+ *
+ * Copyright 2016 Roland Richter
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+ 
+#include <SoftwareSerial.h>
+
+#include <RBD_Timer.h>
+#include <RBD_Button.h>
+
+
+// Taster an Pin 2 und Pin 3
+RBD::Button increment(2);
+RBD::Button decrement(3);
+
+// Pin der ersten LED
+const int LEDPin = 11;
+
+// Serial 7-Segment Display an Pin 12
+SoftwareSerial s7s(3, 12);
+
+
+RBD::Timer latency;
+char str[6];
+
+// Zähler mit oder ohne Vorzeichen
+byte counter = 0;
+/* int8_t counter = 0; */
+
+
+
+void setup()
+{
+    // Pins 4 bis 11 sind OUTPUT
+    for (int pos = 0; pos < 8; ++pos) {
+        pinMode(LEDPin - pos, OUTPUT);
+    }
+
+    s7s.begin(9600);
+    s7s.write(0x76); // Clear display command
+
+    latency.setHertz(6);
+}
+
+
+void loop()
+{
+    // Falls Taste gedrückt ist, ändere Zähler sechs Mal pro Sekunde
+    if (latency.isExpired()) {
+        if (increment.isPressed()) {
+            ++counter;
+            latency.restart();
+        }
+        else if (decrement.isPressed()) {
+            --counter;
+            latency.restart();
+        }
+    }
+
+    // Zeige Zähler als Binärzahl an
+    for (int pos = 0; pos < 8; ++pos) {
+        digitalWrite(LEDPin - pos, bitRead(counter, pos) ? HIGH : LOW);
+    }
+
+    sprintf(str, "%4d", counter);
+    s7s.print(str);
+
+    delay(20);
+}
+