Diff: main.cpp

Revision:

0:1bf3770a24f7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Jan 25 17:31:14 2015 +0000
@@ -0,0 +1,44 @@
+/***********************************
+name:   BERTL_2014_LED D2 blink via I2C 
+modyfied by ENE@bulme.at
+description:
+  Alle LED sind INVERS dh 0 = EIN;  1 = AUS;
+  mit LED D2 blinken
+*/  
+  
+#include "mbed.h" 
+/*** Portkonfiguration ***/
+Serial pc(USBTX, USBRX); // tx, rx
+I2C i2c(p28,p27);
+
+/*** Funktionsdefinitionen ***/
+
+const int addr = 0x40;  // I2C-Adresse PCA9555
+char cmd[3];            // Datenarray für I2C
+
+/*** Funktionen ***/
+int main()
+{
+/*** I2C Konfigurationen ***/
+        i2c.frequency(40000);  // I2C Frequenz 40kHz
+        cmd[0] = 0x06;
+        cmd[1] = 0x00;           
+        i2c.write(addr, cmd, 2); // Define Port0 = Out
+
+
+/*** Hauptprogramm - Endlosschleife ***/
+    while(1) 
+    {
+        cmd[0] = 0x02;
+        cmd[1] = 0xFD;           // D2 ON ->   1111 1101   
+        i2c.write(addr, cmd, 2); // Def. Port0 = 0xFD
+        wait(0.5);
+        
+        //cmd[0] = 0x02;         // nicht mehr nötig, da bereits definiert !
+                                 // und nicht verändert
+        cmd[1] = 0xFF;           // Alle LED OFF ->  1111 1111 
+        i2c.write(addr, cmd, 2); // Def. Port0 = 0xFF
+        wait(0.5);
+                  
+    }
+}