sdio_arch.c

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/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
                 2011,2012 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.
    */
 
#include "std.h"
#include <string.h>
#include <ch.h>
#include <hal.h>
#include "mcu_periph/sdio.h"
#include <stdarg.h>
#include "mcu_periph/gpio.h"
#include BOARD_CONFIG
 
 
static enum {STOP, CONNECT} cnxState = STOP;
 
 
bool sdio_connect(void)
{
  if (!sdc_lld_is_card_inserted(NULL)) {
    return FALSE;
  }
 
  if (cnxState == CONNECT) {
    return TRUE;
  }
 
  // Try only 3 times to prevent hanging
  for (uint8_t i = 0; i < 3; i++) {
    sdcStart(&SDCD1, NULL);
    if (sdcConnect(&SDCD1) == HAL_SUCCESS) {
      cnxState = CONNECT;
      return TRUE;
    }
    sdcStop(&SDCD1);
    chThdSleepMilliseconds(100);
  }
 
  return FALSE;
}
 
 
bool sdio_disconnect(void)
{
  if (cnxState == STOP) {
    return TRUE;
  }
  if (sdcDisconnect(&SDCD1)) {
    return FALSE;
  }
  sdcStop(&SDCD1);
  cnxState = STOP;
  return TRUE;
}
 
bool is_card_inserted(void)
{
  return sdc_lld_is_card_inserted(NULL);
}