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RIOT/boards/msba2-common/board_common_init.c 1.76 KB
a752c7ab   elopes   add first test an...
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  /*
   * Copyright (C) 2008-2009, Freie Universitaet Berlin
   *
   * This file is subject to the terms and conditions of the GNU Lesser
   * General Public License v2.1. See the file LICENSE in the top level
   * directory for more details.
   */
  
  /**
   * @ingroup msba2
   * @{
   */
  
  /**
   * @file
   * @brief       MSB-A2 board initialization
   *
   * @author      Heiko Will
   * @author      Kaspar Schleiser
   * @author      Michael Baar <baar@inf.fu-berlin.de>
   * @author      Zakaria Kasmi <zkasmi@inf.fu-berlin.de>
   * @note        $Id$
   */
  #include <string.h>
  #include "board.h"
  #include "msba2_common.h"
  #include "cpu.h"
  
  #define CL_CPU_DIV      4
  
  #define WD_INTERVAL     10      /**< number of seconds before WD triggers */
  
  /*---------------------------------------------------------------------------*/
  /**
   * @brief   Enabling MAM and setting number of clocks used for Flash memory fetch
   * @internal
   */
  static void
  init_mam(void)
  {
      MAMCR  = 0x0000;
      MAMTIM = 0x0003;
      MAMCR  = 0x0002;
  }
  /*---------------------------------------------------------------------------*/
  void init_clks2(void)
  {
      // Wait for the PLL to lock to set frequency
      while (!(PLLSTAT & BIT26));
  
      // Connect the PLL as the clock source
      PLLCON = 0x0003;
      pllfeed();
  
      /* Check connect bit status */
      while (!(PLLSTAT & BIT25));
  }
  
  void watchdog_init(void)
  {
      WDCLKSEL = 0;                                   // clock source: RC oscillator
      WDMOD &= ~WDTOF;                                // clear time-out flag
      WDTC = (F_RC_OSCILLATOR / 4) * WD_INTERVAL;
  }
  
  
  void bl_init_clks(void)
  {
      watchdog_init();
      PCONP = PCRTC;          // switch off everything except RTC
      init_clks1();
      init_clks2();
      init_mam();
  }
  
  /*---------------------------------------------------------------------------*/