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--- projects:c-info-wand [2015/04/19 03:13] – created smile
+++ projects:c-info-wand [2015/04/25 01:53] (current) – [code] uk
@@ Line 1: / Line 1: @@
 ====== c-info-wand ======
+{{:projects:c-info-wall.jpg?200|}}
 ===== elektronic =====
   * connected launchpad
-  * 3 RGB LED stripes
+  * 3 RGB LED stripes (common +)
-  * PWM PINs:
+  * MOSFETs: IRL540N
+  * Schaltung ist wie beim Ingress-Table: https://github.com/c-base/ingress-table#led-driver-circuit
+  * PWM-PINs in RGB-Dreier-Gruppen:
+    * erste Gruppe: PM_3, PD_1, PD_0
+    * zweite Gruppe: PL_4, PL_5, PM_1
+    * dritte Gruppe: PM_7, PA_7, PM_6
+  * Pinout siehe: http://energia.nu/img/EK-TM4C1294XL.jpg
+===== code =====
+  * Sourcecode uses energia: http://energia.nu/
+  * Sourcecode on github: https://gist.github.com/uwekamper/ebefbdc992248407a1e7
+<code>
+/*
+  Fade for c-info wall at c-base with MQTT
+*/
+#include <SPI.h>
+#include <Ethernet.h>
+#include <PubSubClient.h>
+// Apparently the preprocessor variables B0 and B1 are already taken.
+// Therefore we use the prefix CBASE
+#define CBASER0 PM_3
+#define CBASEG0 PD_1
+#define CBASEB0 PD_0
+#define CBASER1 PL_4
+#define CBASEG1 PL_5
+#define CBASEB1 PM_1
+#define CBASER2 PM_7
+#define CBASEG2 PA_7
+#define CBASEB2 PM_6
+int brightness = 50;    // how bright the LED is
+int fadeAmount = 1;    // how many points to fade the LED by
+int fadeCounter = 0;
+// MQTTServer to use
+char server[] = "c-beam.cbrp3.c-base.org";
+void callback(char* topic, byte* payload, unsigned int length) {
+  Serial.print("Received message for topic ");
+  Serial.print(topic);
+  Serial.print("with length ");
+  Serial.println(length);
+  Serial.println("Message:");
+  Serial.write(payload, length);
+  Serial.println();
+  fadeCounter = 20;
+}
+EthernetClient ethClient;
+PubSubClient client(server, 1883, callback, ethClient);
+void setup()  {
+  pinMode(CBASER0, OUTPUT);
+  pinMode(CBASEG0, OUTPUT);
+  pinMode(CBASEB0, OUTPUT);
+  pinMode(CBASER1, OUTPUT);
+  pinMode(CBASEG1, OUTPUT);
+  pinMode(CBASEB1, OUTPUT);
+  pinMode(CBASER2, OUTPUT);
+  pinMode(CBASEG2, OUTPUT);
+  pinMode(CBASEB2, OUTPUT);
+  Serial.begin(115200);
+  Serial.print("Ethernet starting.");
+  // Start Ethernet with the build in MAC Address
+  Ethernet.begin(0);
+  Serial.print("My IP address: ");
+  Serial.println(Ethernet.localIP());
+}
+void doFade() {
+  while(true) {
+    if (brightness < 50) {
+      fadeAmount = 1;
+      brightness = 50;
+      return;
+    }
+    if (brightness >= 200) {
+      fadeAmount = -1;
+    }
+    // There was some problem with the upper-most LED stripe.
+    // That is why we just set this one to full brightness forever.
+    if(fadeCounter > 0) {
+      analogWrite(CBASER0, 0);
+      analogWrite(CBASEG0, 0);
+      analogWrite(CBASEB0, 255);
+    }
+    else {
+      analogWrite(CBASER0, 255);
+      analogWrite(CBASEG0, 0);
+      analogWrite(CBASEB0, 0);
+    }
+    // The rest of the wall is pulsing.
+    analogWrite(CBASER1, brightness);
+    analogWrite(CBASEG1, brightness);
+    analogWrite(CBASEB1, brightness);
+    analogWrite(CBASER2, brightness);
+    analogWrite(CBASEG2, brightness);
+    analogWrite(CBASEB2, brightness);
+    delay(10);
+    brightness = brightness + fadeAmount;
+  }
+}
+void loop() {
+  if (!client.connected()) {
+    Serial.println("Disconnected. Reconnecting....");
+    if(!client.connect("c-info")) {
+      Serial.println("Connection failed");
+    } else {
+      Serial.println("Connection success");
+      if(client.subscribe("user/boarding")) {
+        Serial.println("Subscription 2 successfull");
+      }
+    }
+  }
+  client.loop();
+  Serial.print("fadeCounter: ");
+  Serial.println(fadeCounter);
+  doFade();
+  if (fadeCounter > 0) {
+    fadeCounter--;
+  }
+  delay(800);
+}
+</code>

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