More cleanups in CANUSB converter embedded code.

[lincan.git] / embedded / app / usbcan / main.c

diff --git a/embedded/app/usbcan/main.c b/embedded/app/usbcan/main.c
index 0aff2218bee382771d2a40ffbe8532ee352dd1ad..86d98ab703afa743a0bd39699cdd648c93233950 100644 (file)
--- a/embedded/app/usbcan/main.c
+++ b/embedded/app/usbcan/main.c
@@ -1,3 +1,35 @@
+/**************************************************************************/
+/* File: main.c - setup and main loop of USB<->CAN converter              */
+/*                                                                        */
+/* LinCAN - (Not only) Linux CAN bus driver                               */
+/* Copyright (C) 2002-2011 DCE FEE CTU Prague <http://dce.felk.cvut.cz>   */
+/* Copyright (C) 2008 Jan Kriz email:johen@post.cz                        */
+/*                                                                        */
+/* LinCAN is free software; you can redistribute it and/or modify it      */
+/* under terms of the GNU General Public License as published by the      */
+/* Free Software Foundation; either version 2, or (at your option) any    */
+/* later version.  LinCAN is distributed in the hope that it will be      */
+/* useful, but WITHOUT ANY WARRANTY; without even the implied warranty    */
+/* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU    */
+/* General Public License for more details. You should have received a    */
+/* copy of the GNU General Public License along with LinCAN; see file     */
+/* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,  */
+/* Cambridge, MA 02139, USA.                                              */
+/*                                                                        */
+/* To allow use of LinCAN in the compact embedded systems firmware        */
+/* and RT-executives (RTEMS for example), main authors agree with next    */
+/* special exception:                                                     */
+/*                                                                        */
+/* Including LinCAN header files in a file, instantiating LinCAN generics */
+/* or templates, or linking other files with LinCAN objects to produce    */
+/* an application image/executable, does not by itself cause the          */
+/* resulting application image/executable to be covered by                */
+/* the GNU General Public License.                                        */
+/* This exception does not however invalidate any other reasons           */
+/* why the executable file might be covered by the GNU Public License.    */
+/* Publication of enhanced or derived LinCAN files is required although.  */
+/**************************************************************************/
+
 #include <stdio.h>
 #include <string.h>
 #include <cpu_def.h>
@@ -120,6 +152,19 @@ int sys_err(){
   }
 }
 
+/***********************************************************************
+ * Microsecond delay routine
+ ***********************************************************************/
+
+void udelay(long time)
+{
+  volatile long ticks=(time * CCLK) / 2000000;
+  do{
+    ticks--;
+  } while(ticks>0);
+}
+
+
 /***********************************************************************
  * Routine for visible LED blinking (on USB transmission)
  ***********************************************************************/