183 lines
5.7 KiB
C
183 lines
5.7 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file mmc_spi.h
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* @brief MMC over SPI driver header
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* @addtogroup MMC_SPI
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* @{
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*/
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#ifndef _MMC_SPI_H_
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#define _MMC_SPI_H_
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @brief Delays insertions.
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* @details If enabled this options inserts delays into the MMC waiting
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* routines releasing some extra CPU time for the threads with
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* lower priority, this may slow down the driver a bit however.
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* This option is recommended also if the SPI driver does not
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* use a DMA channel and heavily loads the CPU.
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*/
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#if !defined(MMC_NICE_WAITING) || defined(__DOXYGEN__)
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#define MMC_NICE_WAITING TRUE
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#endif
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/**
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* @brief Number of positive insertion queries before generating the
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* insertion event.
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*/
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#if !defined(MMC_POLLING_INTERVAL) || defined(__DOXYGEN__)
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#define MMC_POLLING_INTERVAL 10
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#endif
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/**
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* @brief Interval, in milliseconds, between insertion queries.
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*/
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#if !defined(MMC_POLLING_DELAY) || defined(__DOXYGEN__)
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#define MMC_POLLING_DELAY 10
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#endif
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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#define MMC_CMD0_RETRY 10
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#define MMC_CMD1_RETRY 100
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#define MMC_WAIT_DATA 10000
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#define MMC_CMDGOIDLE 0
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#define MMC_CMDINIT 1
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#define MMC_CMDREADCSD 9
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#define MMC_CMDSTOP 12
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#define MMC_CMDREAD 17
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#define MMC_CMDREADMULTIPLE 18
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#define MMC_CMDWRITE 24
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#define MMC_CMDWRITEMULTIPLE 25
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief Driver state machine possible states.
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*/
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typedef enum {
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MMC_UNINIT = 0, /**< @brief Not initialized. */
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MMC_STOP = 1, /**< @brief Stopped. */
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MMC_WAIT = 2, /**< @brief Waiting card. */
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MMC_INSERTED = 3, /**< @brief Card inserted. */
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MMC_READY = 4, /**< @brief Card ready. */
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MMC_READING = 5, /**< @brief Reading. */
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MMC_WRITING = 6 /**< @brief Writing. */
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} mmcstate_t;
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/**
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* @brief Function used to query some hardware status bits.
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*
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* @return The status.
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*/
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typedef bool_t (*mmcquery_t)(void);
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/**
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* @brief Driver configuration structure.
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*/
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typedef struct {
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} MMCConfig;
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/**
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* @brief Structure representing a MMC driver.
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*/
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typedef struct {
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/**
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* @brief Driver state.
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*/
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mmcstate_t mmc_state;
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/**
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* @brief Current configuration data.
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*/
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const MMCConfig *mmc_config;
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/**
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* @brief SPI driver associated to this MMC driver.
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*/
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SPIDriver *mmc_spip;
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/**
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* @brief SPI low speed configuration used during initialization.
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*/
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const SPIConfig *mmc_lscfg;
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/**
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* @brief SPI high speed configuration used during transfers.
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*/
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const SPIConfig *mmc_hscfg;
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/**
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* @brief Write protect status query function.
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*/
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mmcquery_t mmc_is_protected;
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/**
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* @brief Insertion status query function.
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*/
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mmcquery_t mmc_is_inserted;
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/**
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* @brief Card insertion event source.
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*/
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EventSource mmc_inserted_event;
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/**
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* @brief Card removal event source.
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*/
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EventSource mmc_removed_event;
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/**
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* @brief MMC insertion polling timer.
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*/
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VirtualTimer mmc_vt;
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/**
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* @brief Insertion counter.
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*/
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uint_fast8_t mmc_cnt;
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} MMCDriver;
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void mmcInit(void);
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void mmcObjectInit(MMCDriver *mmcp, SPIDriver *spip,
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const SPIConfig *lscfg, const SPIConfig *hscfg,
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mmcquery_t is_protected, mmcquery_t is_inserted);
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void mmcStart(MMCDriver *mmcp, const MMCConfig *config);
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void mmcStop(MMCDriver *mmcp);
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bool_t mmcConnect(MMCDriver *mmcp);
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bool_t mmcStartSequentialRead(MMCDriver *mmcp, uint32_t startblk);
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bool_t mmcSequentialRead(MMCDriver *mmcp, uint8_t *buffer);
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bool_t mmcStopSequentialRead(MMCDriver *mmcp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _MMC_SPI_H_ */
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/** @} */
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