Diff: ShiftOut.h

Revision:

0:9cf8e8a3a8d6

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ShiftOut.h	Fri Jun 20 01:07:06 2014 +0000
@@ -0,0 +1,43 @@
+#ifndef SHIFTOUT_H
+#define SHIFTOUT_H
+
+#include <mbed.h>
+
+class ShiftOut
+{
+
+public :
+
+    ShiftOut(PinName data, PinName clk, PinName latch, int8_t registerCount = 8) {
+        dataout = new DigitalOut(data);
+        clkout = new DigitalOut(clk);
+        latchout = new DigitalOut(latch);
+        this->registerCount = registerCount;
+    }
+
+    ~ShiftOut() {
+        delete clkout;
+        delete dataout;
+        delete latchout;
+    }
+
+    void write(int8_t data) {
+        *latchout = 0;
+        for(int i = registerCount - 1; i >=  0; i--) {
+            *clkout = 0;
+            wait_us(0.01);
+            *dataout = (data & (1 << i)) != 0; // 1 or 0
+            *clkout = 1;
+            wait_us(0.01);
+        }
+        *latchout = 1;
+    }
+
+private :
+    DigitalOut *clkout;
+    DigitalOut *dataout;
+    DigitalOut *latchout;
+    int8_t registerCount;
+};
+
+#endif
\ No newline at end of file