text: // ----------------------------------------------------------------------------
  /*
   * Copyright (c) 2007 Fabian Greif, Roboterclub Aachen e.V.
   *  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * $Id: mcp2515_set_mode.c 120 2014-03-24 15:06:21Z amerkle $
   */
  // ----------------------------------------------------------------------------
  
  #include "mcp2515_private.h"
  #ifdef  SUPPORT_FOR_MCP2515__
  
  // ----------------------------------------------------------------------------
  void
  mcp2515_set_mode(can_mode_t mode)
  {
      uint8_t reg = 0;
  
      if (mode == LISTEN_ONLY_MODE) {
          reg = (1<<REQOP1)|(1<<REQOP0);
      }
      else if (mode == LOOPBACK_MODE) {
          reg = (1<<REQOP1);
      }
      else if (mode == SLEEP_MODE) {
          reg = (1<<REQOP0);
      }
  
      // set the new mode
      mcp2515_bit_modify(CANCTRL, (1<<REQOP2)|(1<<REQOP1)|(1<<REQOP0), reg);
      while ((mcp2515_read_register(CANSTAT) & 0xe0) != reg) {
          // wait for the new mode to become active
      }
  }
  
  #endif  // SUPPORT_FOR_MCP2515__
  