/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
                 2011,2012 Giovanni Di Sirio.

    This file is part of ChibiOS/RT.

    ChibiOS/RT is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    ChibiOS/RT 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 this program.  If not, see <http://www.gnu.org/licenses/>.

                                      ---

    A special exception to the GPL can be applied should you wish to distribute
    a combined work that includes ChibiOS/RT, without being obliged to provide
    the source code for any proprietary components. See the file exception.txt
    for full details of how and when the exception can be applied.
*/

/**
 * @defgroup HAL HAL Driver
 * @brief   Hardware Abstraction Layer.
 * @details The HAL (Hardware Abstraction Layer) driver performs the system
 *          initialization and includes the platform support code shared by
 *          the other drivers. This driver does contain any API function
 *          except for a general initialization function @p halInit() that
 *          must be invoked before any HAL service can be used, usually the
 *          HAL initialization should be performed immediately before the
 *          kernel initialization.<br>
 *          Some HAL driver implementations also offer a custom early clock
 *          setup function that can be invoked before the C runtime
 *          initialization in order to accelerate the startup time.
 *
 * @ingroup IO
 */