git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@6108 35acf78f-673a-0410-8e92-d51de3d6d3f4

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diff --git a/os/hal/dox/ext.dox b/os/hal/dox/ext.dox
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-/*

-    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,

-                 2011,2012,2013 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/>.

-*/

-

-/**

- * @defgroup EXT EXT Driver

- * @brief   Generic EXT Driver.

- * @details This module implements a generic EXT (EXTernal) driver.

- * @pre     In order to use the EXT driver the @p HAL_USE_EXT option

- *          must be enabled in @p halconf.h.

- *

- * @section ext_1 Driver State Machine

- * The driver implements a state machine internally, not all the driver

- * functionalities can be used in any moment, any transition not explicitly

- * shown in the following diagram has to be considered an error and shall

- * be captured by an assertion (if enabled).

- * @if LATEX_PDF

- * @dot

-  digraph example {

-    size="5, 7";

-    rankdir="LR";

-

-    node [shape=circle, fontname=Sans, fontsize=8, fixedsize="true", width="0.9", height="0.9"];

-    edge [fontname=Sans, fontsize=8];

-

-    uninit [label="EXT_UNINIT", style="bold"];

-    stop  [label="EXT_STOP\nLow Power"];

-    active [label="EXT_ACTIVE"];

-

-    uninit -> stop [label="extInit()"];

-    stop -> stop [label="\nextStop()"];

-    stop -> active [label="\nextStart()"];

-    active -> stop [label="\nextStop()"];

-    active -> active [label="\nextStart()"];

-  }

- * @enddot

- * @else

- * @dot

-  digraph example {

-    rankdir="LR";

-

-    node [shape=circle, fontname=Sans, fontsize=8, fixedsize="true", width="0.9", height="0.9"];

-    edge [fontname=Sans, fontsize=8];

-

-    uninit [label="EXT_UNINIT", style="bold"];

-    stop  [label="EXT_STOP\nLow Power"];

-    active [label="EXT_ACTIVE"];

-

-    uninit -> stop [label="extInit()"];

-    stop -> stop [label="\nextStop()"];

-    stop -> active [label="\nextStart()"];

-    active -> stop [label="\nextStop()"];

-    active -> active [label="\nextStart()"];

-  }

- * @enddot

- * @endif

- *

- * @section ext_2 EXT Operations.

- * This driver abstracts generic external interrupt sources, a callback

- * is invoked when a programmable transition is detected on one of the

- * configured channels. Several channel modes are possible.

- * - <b>EXT_CH_MODE_DISABLED</b>, channel not used.

- * - <b>EXT_CH_MODE_RISING_EDGE</b>, callback on a rising edge.

- * - <b>EXT_CH_MODE_FALLING_EDGE</b>, callback on a falling edge.

- * - <b>EXT_CH_MODE_BOTH_EDGES</b>, callback on a both edges.

- * .

- * @ingroup IO

- */