FIX: The input handling for "hf 14b write" is now correct. Thanks Asper for spotting the fault.

ADD: crc32.c functionality

common/crc32.h

@@ -0,0 +1,15 @@
+//-----------------------------------------------------------------------------
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// CRC32
+//-----------------------------------------------------------------------------
+
+#ifndef __CRC32_H
+#define __CRC32_H
+
+void             	crc32 (const uint8_t *data, const size_t len, uint8_t *crc);
+void             	crc32_append (uint8_t *data, const size_t len);
+
+#endif