Diff: I2C.cpp

Revision:

0:d7de08989175

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2C.cpp	Mon Feb 29 12:06:30 2016 +0000
@@ -0,0 +1,54 @@
+#include "mbed.h"
+#include "I2C.h"
+
+I2C pc9555 (p28, p27);    //SDA,SCL
+
+void bertl_PC9555_init()
+{
+    char data[2];
+    
+    // I2C Initialisierung
+    pc9555.frequency(PC9555_FREQUENCY);
+    
+    // Port 0 = LEDs
+    
+    // Adresse, RW# = 0, Config Port 0 (6) = 0x00 (=OutPut), Stop
+    data[0] = PC9555_Port0_DIR_IN;
+    data[1] = 0x00;     // Output    
+    pc9555.write(PC9555_ADDR, data, 2);  
+    
+    // Adresse, RW# = 0, Config Port 1 (7) = 0x00 (=InPut), Stop
+    data[0] = PC9555_Port1_DIR_IN;
+    data[1] = 0xFF;     // Input
+    pc9555.write(PC9555_ADDR, data, 2);  
+    
+    // Adresse, RW# = 0, Polarity Inversion Port 0 (4) = 0xFF (= inverted) , Stop  
+    data[0] = PC9555_Port0_INV;
+    data[1] = 0xFF;
+    pc9555.write(PC9555_ADDR, data, 2); 
+    
+     // Adresse, RW# = 0, Polarity Inversion Port 1 (5) = 0x00 (=NonInverted) , Stop
+    data[0] = PC9555_Port1_INV;
+    data[1] = 0x00;
+    pc9555.write(PC9555_ADDR, data, 2);      
+}
+
+void bertl_PC9555_leds(unsigned char leds)
+{
+    char data[2];   // Two Bytes for Transmitt via I2C
+    
+    // Send leds to Port0 of PC9555 tp I2C: 
+    // Start, Adress, RW# = 0, CMD I2C_Port0_OUT , leds, Stop
+    data[0] = PC9555_Port0_OUT;
+    data[1] = ~leds;        //bitwise inversion since HW is switched on with 0 (invers logic)
+    pc9555.write(PC9555_ADDR, data, 2);
+}
+
+unsigned char bertl_PC9555_switches()
+{
+    char data[1];
+    data[0] = PC9555_Port1_IN;
+    pc9555.write(PC9555_ADDR, data, 1, true); // tell him, we want to read Port1, no STOP
+    pc9555.read(PC9555_ADDR, data, 1, false); // read 1 byte, then send STOP
+    return((unsigned char) data[0]);
+}
\ No newline at end of file