o add usb test

poc/lpc2148_usb/target/usbdebug.h

@@ -0,0 +1,12 @@
+
+
+int printf(const char *format, ...);
+
+#ifdef DEBUG
+#define DBG	printf
+#define ASSERT(x)	if(!(x)){DBG("\nAssertion '%s' failed in %s:%s#%d!\n",#x,__FILE__,__FUNCTION__,__LINE__);while(1);}
+#else
+#define DBG(x ...)
+#define ASSERT(x)
+#endif
+