122 lines
4.9 KiB
Plaintext
122 lines
4.9 KiB
Plaintext
|
/*
|
||
|
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 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 MMC_SPI MMC over SPI Driver
|
||
|
|
* @brief Generic MMC driver.
|
||
|
|
* @details This module implements a portable MMC driver that uses a SPI
|
||
|
|
* driver as physical layer.
|
||
|
|
* @pre In order to use the ADC driver the @p CH_HAL_USE_MMC_SPI option
|
||
|
|
* must be enabled in @p halconf.h.
|
||
|
|
*
|
||
|
|
* @section mmc_spi_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=Helvetica, fontsize=8, fixedsize="true", width="0.9", height="0.9"];
|
||
|
|
edge [fontname=Helvetica, fontsize=8];
|
||
|
|
|
||
|
|
any [label="Any State"];
|
||
|
|
stop2 [label="MMC_STOP\nLow Power"];
|
||
|
|
uninit [label="MMC_UNINIT", style="bold"];
|
||
|
|
stop [label="MMC_STOP\nLow Power"];
|
||
|
|
wait [label="MMC_WAIT\nWaiting Card"];
|
||
|
|
inserted [label="MMC_INSERTED\nCard Inserted"];
|
||
|
|
ready [label="MMC_READY\nCard Ready"];
|
||
|
|
reading [label="MMC_READING\nReading"];
|
||
|
|
writing [label="MMC_WRITING\nWriting"];
|
||
|
|
|
||
|
|
uninit -> stop [label="mmcInit()"];
|
||
|
|
stop -> wait [label="mmcStart()", constraint=false];
|
||
|
|
wait -> inserted [label="insertion (inserted event)"];
|
||
|
|
inserted -> inserted [label="mmcDisconnect()"];
|
||
|
|
inserted -> ready [label="mmcConnect()"];
|
||
|
|
ready -> ready [label="mmcConnect()"];
|
||
|
|
ready -> inserted [label="mmcDisconnect()"];
|
||
|
|
ready -> reading [label="mmcStartSequentialRead()"];
|
||
|
|
reading -> reading [label="mmcSequentialRead()"];
|
||
|
|
reading -> ready [label="mmcStopSequentialRead()"];
|
||
|
|
reading -> ready [label="read error"];
|
||
|
|
ready -> writing [label="mmcStartSequentialWrite()"];
|
||
|
|
writing -> writing [label="mmcSequentialWrite()"];
|
||
|
|
writing -> ready [label="mmcStopSequentialWrite()"];
|
||
|
|
writing -> ready [label="write error"];
|
||
|
|
inserted -> wait [label="removal (removed event)"];
|
||
|
|
ready -> wait [label="removal (removed event)"];
|
||
|
|
reading -> wait [label="removal (removed event)"];
|
||
|
|
writing -> wait [label="removal (removed event)"];
|
||
|
|
|
||
|
|
any -> stop2 [label="mmcStop()"];
|
||
|
|
}
|
||
|
|
* @enddot
|
||
|
|
* @else
|
||
|
|
* @dot
|
||
|
|
digraph example {
|
||
|
|
rankdir="LR";
|
||
|
|
node [shape=circle, fontname=Helvetica, fontsize=8, fixedsize="true", width="0.9", height="0.9"];
|
||
|
|
edge [fontname=Helvetica, fontsize=8];
|
||
|
|
|
||
|
|
any [label="Any State"];
|
||
|
|
stop2 [label="MMC_STOP\nLow Power"];
|
||
|
|
uninit [label="MMC_UNINIT", style="bold"];
|
||
|
|
stop [label="MMC_STOP\nLow Power"];
|
||
|
|
wait [label="MMC_WAIT\nWaiting Card"];
|
||
|
|
inserted [label="MMC_INSERTED\nCard Inserted"];
|
||
|
|
ready [label="MMC_READY\nCard Ready"];
|
||
|
|
reading [label="MMC_READING\nReading"];
|
||
|
|
writing [label="MMC_WRITING\nWriting"];
|
||
|
|
|
||
|
|
uninit -> stop [label="mmcInit()"];
|
||
|
|
stop -> wait [label="mmcStart()", constraint=false];
|
||
|
|
wait -> inserted [label="insertion (inserted event)"];
|
||
|
|
inserted -> inserted [label="mmcDisconnect()"];
|
||
|
|
inserted -> ready [label="mmcConnect()"];
|
||
|
|
ready -> ready [label="mmcConnect()"];
|
||
|
|
ready -> inserted [label="mmcDisconnect()"];
|
||
|
|
ready -> reading [label="mmcStartSequentialRead()"];
|
||
|
|
reading -> reading [label="mmcSequentialRead()"];
|
||
|
|
reading -> ready [label="mmcStopSequentialRead()"];
|
||
|
|
reading -> ready [label="read error"];
|
||
|
|
ready -> writing [label="mmcStartSequentialWrite()"];
|
||
|
|
writing -> writing [label="mmcSequentialWrite()"];
|
||
|
|
writing -> ready [label="mmcStopSequentialWrite()"];
|
||
|
|
writing -> ready [label="write error"];
|
||
|
|
inserted -> wait [label="removal (removed event)"];
|
||
|
|
ready -> wait [label="removal (removed event)"];
|
||
|
|
reading -> wait [label="removal (removed event)"];
|
||
|
|
writing -> wait [label="removal (removed event)"];
|
||
|
|
|
||
|
|
any -> stop2 [label="mmcStop()"];
|
||
|
|
}
|
||
|
|
* @enddot
|
||
|
|
* @endif
|
||
|
|
*
|
||
|
|
* The MMC drivers currently supports only cards with capacity up to 2GB
|
||
|
|
* and does not implement CRC checking. Hot plugging and removal are supported
|
||
|
|
* through kernel events.
|
||
|
|
*
|
||
|
|
* @ingroup IO
|
||
|
|
*/
|