--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbdrv/oddebug.c	Thu Feb 16 14:40:23 2017 +0100
@@ -0,0 +1,49 @@
+/* Name: oddebug.c
+ * Project: AVR library
+ * Author: Christian Starkjohann
+ * Creation Date: 2005-01-16
+ * Tabsize: 4
+ * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
+ * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
+ */
+
+#include "oddebug.h"
+
+#if DEBUG_LEVEL > 0
+
+#warning "Never compile production devices with debugging enabled"
+
+static void uartPutc(char c)
+{
+    while(!(ODDBG_USR & (1 << ODDBG_UDRE)));    /* wait for data register empty */
+    ODDBG_UDR = c;
+}
+
+static uchar    hexAscii(uchar h)
+{
+    h &= 0xf;
+    if(h >= 10)
+        h += 'a' - (uchar)10 - '0';
+    h += '0';
+    return h;
+}
+
+static void printHex(uchar c)
+{
+    uartPutc(hexAscii(c >> 4));
+    uartPutc(hexAscii(c));
+}
+
+void    odDebug(uchar prefix, uchar *data, uchar len)
+{
+    printHex(prefix);
+    uartPutc(':');
+    while(len--){
+        uartPutc(' ');
+        printHex(*data++);
+    }
+    uartPutc('\r');
+    uartPutc('\n');
+}
+
+#endif