130 lines
3.7 KiB
C
130 lines
3.7 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.c
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* @brief MMC over SPI driver code
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* @addtogroup MMC_SPI
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* @{
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*/
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#include <ch.h>
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#include <spi.h>
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#include <mmc_spi.h>
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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void tmrfunc(void *p) {
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MMCDriver *mmcp = p;
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if (mmcp->mmc_cnt > 0) {
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if (mmcp->mmc_is_inserted()) {
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if (--mmcp->mmc_cnt == 0) {
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mmcp->mmc_state = MMC_INSERTED;
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chEvtBroadcastI(&mmcp->mmc_inserted_event);
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}
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}
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else
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mmcp->mmc_cnt = MMC_POLLING_INTERVAL;
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}
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else {
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if (!mmcp->mmc_is_inserted()) {
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mmcp->mmc_state = MMC_WAIT;
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mmcp->mmc_cnt = MMC_POLLING_INTERVAL;
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chEvtBroadcastI(&mmcp->mmc_removed_event);
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}
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}
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chVTSetI(&mmcp->mmc_vt, MS2ST(MMC_POLLING_DELAY), tmrfunc, mmcp);
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}
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief MMC over SPI driver initialization.
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*/
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void mmcInit(void) {
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}
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/**
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* @brief Initializes an instance.
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*
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* @param[in] mmcp pointer to the @p MMCDriver object
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*/
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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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mmcp->mmc_state = MMC_STOP;
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mmcp->mmc_config = NULL;
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mmcp->mmc_spip = spip;
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mmcp->mmc_lscfg = lscfg;
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mmcp->mmc_hscfg = hscfg;
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mmcp->mmc_is_protected = is_protected;
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mmcp->mmc_is_inserted = is_inserted;
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chEvtInit(&mmcp->mmc_inserted_event);
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chEvtInit(&mmcp->mmc_removed_event);
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}
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/**
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* @brief Configures and activates the MMC peripheral.
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*
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* @param[in] mmcp pointer to the @p MMCDriver object
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* @param[in] config pointer to the @p MMCConfig object
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*/
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void mmcStart(MMCDriver *mmcp, const MMCConfig *config) {
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chDbgCheck((mmcp != NULL) && (config != NULL), "mmcStart");
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chSysLock();
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chDbgAssert(mmcp->mmc_state == MMC_STOP, "mmcStart(), #1", "invalid state");
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mmcp->mmc_config = config;
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mmcp->mmc_state = MMC_WAIT;
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mmcp->mmc_cnt = MMC_POLLING_INTERVAL;
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chVTSetI(&mmcp->mmc_vt, MS2ST(MMC_POLLING_DELAY), tmrfunc, mmcp);
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chSysUnlock();
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}
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/**
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* @brief Deactivates the MMC peripheral.
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*
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* @param[in] mmcp pointer to the @p MMCDriver object
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*/
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void mmcStop(MMCDriver *mmcp) {
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chDbgCheck(mmcp != NULL, "mmcStop");
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chSysLock();
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chDbgAssert((mmcp->mmc_state != MMC_UNINIT) &&
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(mmcp->mmc_state != MMC_RUNNING),
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"mmcStop(), #1",
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"invalid state");
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if (mmcp->mmc_state == MMC_READY) {
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mmcp->mmc_state = MMC_STOP;
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chVTResetI(&mmcp->mmc_vt);
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}
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chSysUnlock();
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}
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/** @} */
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