cores/xmc: Implemented shift.

Signed-off-by: MDin <Dinesh.M-EE@infineon.com>

Author: dineshgit411

cores/xmc/Shift.cpp

@@ -0,0 +1,35 @@
+#include "Arduino.h"
+
+void shiftOut(pin_size_t ulDataPin, pin_size_t ulClockPin, BitOrder ulBitOrder, uint8_t ulVal) {
+    uint8_t i;
+
+    for (i = 0; i < 8; i++) {
+        if (ulBitOrder == LSBFIRST) {
+            digitalWrite(ulDataPin, !!(ulVal & (1 << i)));
+        } else {
+            digitalWrite(ulDataPin, !!(ulVal & (1 << (7 - i))));
+        }
+
+        digitalWrite(ulClockPin, HIGH);
+        digitalWrite(ulClockPin, LOW);
+    }
+}
+
+uint8_t shiftIn(pin_size_t ulDataPin, pin_size_t ulClockPin, BitOrder ulBitOrder) {
+    uint8_t value = 0;
+    uint8_t i;
+
+    for (i = 0; i < 8; ++i) {
+        digitalWrite(ulClockPin, HIGH);
+
+        if (ulBitOrder == LSBFIRST) {
+            value |= digitalRead(ulDataPin) << i;
+        } else {
+            value |= digitalRead(ulDataPin) << (7 - i);
+        }
+
+        digitalWrite(ulClockPin, LOW);
+    }
+
+    return value;
+}