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ChibiOS 2.6.8, until I can figure out where to get it from git.

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Jared Boone 2015-07-08 08:40:23 -07:00
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firmware/chibios/os/hal/dox/ext.dox Executable file
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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/>.
---
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 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
*/