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bertos/drv/sd.h

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+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
+ * -->
+ *
+ * \brief Function library for secure digital memory.
+ *
+ *
+ * \author Francesco Sacchi <batt@develer.com>
+ *
+ * $WIZ$ module_name = "sd"
+ * $WIZ$ module_depends = "kfile", "timer", "kblock"
+ * $WIZ$ module_hw = "bertos/hw/hw_sd.h"
+ * $WIZ$ module_configuration = "bertos/cfg/cfg_sd.h"
+ */
+
+
+#ifndef DRV_SD_H
+#define DRV_SD_H
+
+#include "cfg/cfg_sd.h"
+
+#include <io/kfile.h>
+#include <io/kblock.h>
+
+#include <fs/fatfs/diskio.h>
+
+
+#define SD_UNBUFFERED     BV(0) ///< Open SD memory disabling page caching, no modification and partial write are allowed.
+
+/**
+ * SD Card context structure.
+ */
+typedef struct Sd
+{
+	KBlock b;   ///< KBlock base class
+	KFile *ch;  ///< SPI communication channel
+	uint16_t r1;  ///< Last status data received from SD
+	uint16_t tranfer_len; ///< Lenght for the read/write commands, cached in order to increase speed.
+} Sd;
+
+bool sd_initUnbuf(Sd *sd, KFile *ch);
+bool sd_initBuf(Sd *sd, KFile *ch);
+
+#if CONFIG_SD_OLD_INIT
+	#if !(ARCH & ARCH_NIGHTTEST)
+		#warning "Deprecated: this API will be removed in the next major release,"
+		#warning "please disable CONFIG_SD_OLD_INIT and pass explicitly the SD context to sd_init()."
+	#endif
+
+	/**
+	 * Initializes the SD driver.
+	 *
+	 * \param ch A pointer to a SPI channel where the SD will read/write to.
+	 *
+	 * \return true if initialization succeds, false otherwise.
+	 *
+	 * \note This API is deprecated, disable CONFIG_SD_OLD_INIT and
+	 *       use the new one instead.
+	 *
+	 * \see CONFIG_SD_OLD_INIT.
+	 */
+	#define sd_init(ch) {static struct Sd sd; sd_initUnbuf(&sd, (ch));}
+
+#else
+
+	/**
+	 * Initializes the SD driver.
+	 *
+	 * \param sd The SD KBlock context.
+	 * \param ch A pointer to a SPI channel where the SD will read/write to.
+	 * \param buffered Set to true if you want the KBlock to be buffered,
+	 *        to false otherwise. The FatFs module does not require the device
+	 *        to be buffered because it has an internal cache. This will save
+	 *        512 bytes of RAM in this case.
+	 *
+	 * \return true if initialization succeds, false otherwise.
+	 */
+	#define sd_init(sd, ch, buffered) ((buffered & SD_UNBUFFERED) ? sd_initUnbuf((sd), (ch)) : sd_initBuf((sd), (ch)))
+
+#endif
+
+
+#define KBT_SD MAKE_ID('S', 'D', 'B', 'K')
+
+bool sd_test(Sd *sd);
+void sd_writeTest(Sd *sd);
+
+INLINE Sd *SD_CAST(KBlock *b)
+{
+	ASSERT(b->priv.type == KBT_SD);
+	return (Sd *)b;
+}
+
+
+#endif /* DRV_SD_H */