Diff: ShiftRegister.cpp

Revision:

0:bca974772920

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ShiftRegister.cpp	Sat Aug 23 21:15:47 2014 +0000
@@ -0,0 +1,39 @@
+#include "ShiftRegister.h"
+#include "mbed.h"
+ 
+ShiftRegister::ShiftRegister():_clockPin(NC), _latchPin(NC), _dataPin(NC) {};
+ShiftRegister::ShiftRegister(PinName clockPin, PinName latchPin, PinName dataPin)
+  :_clockPin(clockPin), _latchPin(latchPin), _dataPin(dataPin)
+{
+    _clockPin = 0;
+    _latchPin = 0;
+    _dataPin = 0;
+}
+ 
+void ShiftRegister::shiftByte(unsigned char data)
+{
+    //Make sure all pins are initialised
+    _clockPin = 0;
+    _dataPin = 0;
+    _latchPin = 0;
+    
+    //Shift out data
+    for (int i=7; i>=0; i--)  
+    {
+        shiftBit( (data & (1<<i)) ? 1:0);
+    }
+    
+    //Shift data to output
+    _latchPin = 1;
+    _latchPin = 0;
+} 
+ 
+void ShiftRegister::shiftBit(unsigned char bit)
+{
+    _clockPin = 0;
+    _dataPin = bit;
+    _clockPin = 1;
+    _clockPin = 0;
+    _dataPin = 0;
+
+}
\ No newline at end of file