548 lines
22 KiB
C++
548 lines
22 KiB
C++
/* Arduino SdFat Library
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* Copyright (C) 2009 by William Greiman
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*
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* This file is part of the Arduino SdFat Library
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*
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* This Library 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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*
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* This Library 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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*
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* You should have received a copy of the GNU General Public License
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* along with the Arduino SdFat Library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifndef SdFat_h
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#define SdFat_h
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/**
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* \file
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* SdFile and SdVolume classes
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*/
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#include <avr/pgmspace.h>
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#include "Sd2Card.h"
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#include "FatStructs.h"
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#include "Print.h"
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//------------------------------------------------------------------------------
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/**
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* Allow use of deprecated functions if non-zero
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*/
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#define ALLOW_DEPRECATED_FUNCTIONS 1
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//------------------------------------------------------------------------------
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// forward declaration since SdVolume is used in SdFile
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class SdVolume;
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//==============================================================================
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// SdFile class
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// flags for ls()
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/** ls() flag to print modify date */
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uint8_t const LS_DATE = 1;
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/** ls() flag to print file size */
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uint8_t const LS_SIZE = 2;
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/** ls() flag for recursive list of subdirectories */
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uint8_t const LS_R = 4;
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// use the gnu style oflag in open()
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/** open() oflag for reading */
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uint8_t const O_READ = 0X01;
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/** open() oflag - same as O_READ */
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uint8_t const O_RDONLY = O_READ;
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/** open() oflag for write */
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uint8_t const O_WRITE = 0X02;
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/** open() oflag - same as O_WRITE */
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uint8_t const O_WRONLY = O_WRITE;
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/** open() oflag for reading and writing */
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uint8_t const O_RDWR = (O_READ | O_WRITE);
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/** open() oflag mask for access modes */
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uint8_t const O_ACCMODE = (O_READ | O_WRITE);
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/** The file offset shall be set to the end of the file prior to each write. */
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uint8_t const O_APPEND = 0X04;
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/** synchronous writes - call sync() after each write */
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uint8_t const O_SYNC = 0X08;
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/** create the file if nonexistent */
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uint8_t const O_CREAT = 0X10;
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/** If O_CREAT and O_EXCL are set, open() shall fail if the file exists */
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uint8_t const O_EXCL = 0X20;
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/** truncate the file to zero length */
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uint8_t const O_TRUNC = 0X40;
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// flags for timestamp
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/** set the file's last access date */
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uint8_t const T_ACCESS = 1;
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/** set the file's creation date and time */
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uint8_t const T_CREATE = 2;
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/** Set the file's write date and time */
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uint8_t const T_WRITE = 4;
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// values for type_
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/** This SdFile has not been opened. */
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uint8_t const FAT_FILE_TYPE_CLOSED = 0;
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/** SdFile for a file */
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uint8_t const FAT_FILE_TYPE_NORMAL = 1;
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/** SdFile for a FAT16 root directory */
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uint8_t const FAT_FILE_TYPE_ROOT16 = 2;
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/** SdFile for a FAT32 root directory */
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uint8_t const FAT_FILE_TYPE_ROOT32 = 3;
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/** SdFile for a subdirectory */
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uint8_t const FAT_FILE_TYPE_SUBDIR = 4;
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/** Test value for directory type */
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uint8_t const FAT_FILE_TYPE_MIN_DIR = FAT_FILE_TYPE_ROOT16;
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/** date field for FAT directory entry */
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static inline uint16_t FAT_DATE(uint16_t year, uint8_t month, uint8_t day) {
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return (year - 1980) << 9 | month << 5 | day;
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}
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/** year part of FAT directory date field */
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static inline uint16_t FAT_YEAR(uint16_t fatDate) {
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return 1980 + (fatDate >> 9);
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}
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/** month part of FAT directory date field */
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static inline uint8_t FAT_MONTH(uint16_t fatDate) {
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return (fatDate >> 5) & 0XF;
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}
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/** day part of FAT directory date field */
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static inline uint8_t FAT_DAY(uint16_t fatDate) {
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return fatDate & 0X1F;
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}
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/** time field for FAT directory entry */
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static inline uint16_t FAT_TIME(uint8_t hour, uint8_t minute, uint8_t second) {
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return hour << 11 | minute << 5 | second >> 1;
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}
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/** hour part of FAT directory time field */
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static inline uint8_t FAT_HOUR(uint16_t fatTime) {
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return fatTime >> 11;
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}
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/** minute part of FAT directory time field */
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static inline uint8_t FAT_MINUTE(uint16_t fatTime) {
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return(fatTime >> 5) & 0X3F;
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}
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/** second part of FAT directory time field */
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static inline uint8_t FAT_SECOND(uint16_t fatTime) {
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return 2*(fatTime & 0X1F);
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}
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/** Default date for file timestamps is 1 Jan 2000 */
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uint16_t const FAT_DEFAULT_DATE = ((2000 - 1980) << 9) | (1 << 5) | 1;
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/** Default time for file timestamp is 1 am */
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uint16_t const FAT_DEFAULT_TIME = (1 << 11);
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//------------------------------------------------------------------------------
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/**
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* \class SdFile
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* \brief Access FAT16 and FAT32 files on SD and SDHC cards.
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*/
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class SdFile : public Print {
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public:
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/** Create an instance of SdFile. */
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SdFile(void) : type_(FAT_FILE_TYPE_CLOSED) {}
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/**
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* writeError is set to true if an error occurs during a write().
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* Set writeError to false before calling print() and/or write() and check
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* for true after calls to print() and/or write().
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*/
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bool writeError;
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/**
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* Cancel unbuffered reads for this file.
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* See setUnbufferedRead()
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*/
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void clearUnbufferedRead(void) {
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flags_ &= ~F_FILE_UNBUFFERED_READ;
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}
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uint8_t close(void);
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uint8_t contiguousRange(uint32_t* bgnBlock, uint32_t* endBlock);
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uint8_t createContiguous(SdFile* dirFile,
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const char* fileName, uint32_t size);
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/** \return The current cluster number for a file or directory. */
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uint32_t curCluster(void) const {return curCluster_;}
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/** \return The current position for a file or directory. */
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uint32_t curPosition(void) const {return curPosition_;}
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/**
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* Set the date/time callback function
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*
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* \param[in] dateTime The user's call back function. The callback
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* function is of the form:
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*
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* \code
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* void dateTime(uint16_t* date, uint16_t* time) {
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* uint16_t year;
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* uint8_t month, day, hour, minute, second;
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*
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* // User gets date and time from GPS or real-time clock here
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*
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* // return date using FAT_DATE macro to format fields
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* *date = FAT_DATE(year, month, day);
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*
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* // return time using FAT_TIME macro to format fields
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* *time = FAT_TIME(hour, minute, second);
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* }
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* \endcode
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*
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* Sets the function that is called when a file is created or when
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* a file's directory entry is modified by sync(). All timestamps,
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* access, creation, and modify, are set when a file is created.
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* sync() maintains the last access date and last modify date/time.
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*
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* See the timestamp() function.
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*/
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static void dateTimeCallback(
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void (*dateTime)(uint16_t* date, uint16_t* time)) {
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dateTime_ = dateTime;
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}
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/**
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* Cancel the date/time callback function.
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*/
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static void dateTimeCallbackCancel(void) {
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// use explicit zero since NULL is not defined for Sanguino
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dateTime_ = 0;
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}
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/** \return Address of the block that contains this file's directory. */
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uint32_t dirBlock(void) const {return dirBlock_;}
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uint8_t dirEntry(dir_t* dir);
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/** \return Index of this file's directory in the block dirBlock. */
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uint8_t dirIndex(void) const {return dirIndex_;}
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static void dirName(const dir_t& dir, char* name);
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/** \return The total number of bytes in a file or directory. */
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uint32_t fileSize(void) const {return fileSize_;}
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/** \return The first cluster number for a file or directory. */
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uint32_t firstCluster(void) const {return firstCluster_;}
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/** \return True if this is a SdFile for a directory else false. */
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uint8_t isDir(void) const {return type_ >= FAT_FILE_TYPE_MIN_DIR;}
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/** \return True if this is a SdFile for a file else false. */
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uint8_t isFile(void) const {return type_ == FAT_FILE_TYPE_NORMAL;}
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/** \return True if this is a SdFile for an open file/directory else false. */
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uint8_t isOpen(void) const {return type_ != FAT_FILE_TYPE_CLOSED;}
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/** \return True if this is a SdFile for a subdirectory else false. */
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uint8_t isSubDir(void) const {return type_ == FAT_FILE_TYPE_SUBDIR;}
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/** \return True if this is a SdFile for the root directory. */
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uint8_t isRoot(void) const {
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return type_ == FAT_FILE_TYPE_ROOT16 || type_ == FAT_FILE_TYPE_ROOT32;
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}
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void ls(uint8_t flags = 0, uint8_t indent = 0);
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uint8_t makeDir(SdFile* dir, const char* dirName);
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uint8_t open(SdFile* dirFile, uint16_t index, uint8_t oflag);
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uint8_t open(SdFile* dirFile, const char* fileName, uint8_t oflag);
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uint8_t openRoot(SdVolume* vol);
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static void printDirName(const dir_t& dir, uint8_t width);
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static void printFatDate(uint16_t fatDate);
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static void printFatTime(uint16_t fatTime);
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static void printTwoDigits(uint8_t v);
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/**
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* Read the next byte from a file.
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*
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* \return For success read returns the next byte in the file as an int.
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* If an error occurs or end of file is reached -1 is returned.
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*/
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int16_t read(void) {
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uint8_t b;
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return read(&b, 1) == 1 ? b : -1;
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}
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int16_t read(void* buf, uint16_t nbyte);
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int8_t readDir(dir_t* dir);
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static uint8_t remove(SdFile* dirFile, const char* fileName);
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uint8_t remove(void);
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/** Set the file's current position to zero. */
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void rewind(void) {
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curPosition_ = curCluster_ = 0;
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}
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uint8_t rmDir(void);
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uint8_t rmRfStar(void);
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/** Set the files position to current position + \a pos. See seekSet(). */
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uint8_t seekCur(uint32_t pos) {
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return seekSet(curPosition_ + pos);
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}
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/**
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* Set the files current position to end of file. Useful to position
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* a file for append. See seekSet().
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*/
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uint8_t seekEnd(void) {return seekSet(fileSize_);}
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uint8_t seekSet(uint32_t pos);
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/**
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* Use unbuffered reads to access this file. Used with Wave
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* Shield ISR. Used with Sd2Card::partialBlockRead() in WaveRP.
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*
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* Not recommended for normal applications.
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*/
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void setUnbufferedRead(void) {
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if (isFile()) flags_ |= F_FILE_UNBUFFERED_READ;
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}
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uint8_t timestamp(uint8_t flag, uint16_t year, uint8_t month, uint8_t day,
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uint8_t hour, uint8_t minute, uint8_t second);
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uint8_t sync(void);
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/** Type of this SdFile. You should use isFile() or isDir() instead of type()
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* if possible.
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*
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* \return The file or directory type.
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*/
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uint8_t type(void) const {return type_;}
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uint8_t truncate(uint32_t size);
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/** \return Unbuffered read flag. */
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uint8_t unbufferedRead(void) const {
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return flags_ & F_FILE_UNBUFFERED_READ;
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}
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/** \return SdVolume that contains this file. */
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SdVolume* volume(void) const {return vol_;}
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void write(uint8_t b);
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int16_t write(const void* buf, uint16_t nbyte);
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void write(const char* str);
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void write_P(PGM_P str);
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void writeln_P(PGM_P str);
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//------------------------------------------------------------------------------
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#if ALLOW_DEPRECATED_FUNCTIONS
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// Deprecated functions - suppress cpplint warnings with NOLINT comment
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/** \deprecated Use:
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* uint8_t SdFile::contiguousRange(uint32_t* bgnBlock, uint32_t* endBlock);
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*/
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uint8_t contiguousRange(uint32_t& bgnBlock, uint32_t& endBlock) { // NOLINT
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return contiguousRange(&bgnBlock, &endBlock);
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}
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/** \deprecated Use:
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* uint8_t SdFile::createContiguous(SdFile* dirFile,
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* const char* fileName, uint32_t size)
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*/
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uint8_t createContiguous(SdFile& dirFile, // NOLINT
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const char* fileName, uint32_t size) {
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return createContiguous(&dirFile, fileName, size);
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}
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/**
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* \deprecated Use:
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* static void SdFile::dateTimeCallback(
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* void (*dateTime)(uint16_t* date, uint16_t* time));
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*/
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static void dateTimeCallback(
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void (*dateTime)(uint16_t& date, uint16_t& time)) { // NOLINT
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oldDateTime_ = dateTime;
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dateTime_ = dateTime ? oldToNew : 0;
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}
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/** \deprecated Use: uint8_t SdFile::dirEntry(dir_t* dir); */
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uint8_t dirEntry(dir_t& dir) {return dirEntry(&dir);} // NOLINT
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/** \deprecated Use:
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* uint8_t SdFile::makeDir(SdFile* dir, const char* dirName);
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*/
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uint8_t makeDir(SdFile& dir, const char* dirName) { // NOLINT
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return makeDir(&dir, dirName);
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}
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/** \deprecated Use:
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* uint8_t SdFile::open(SdFile* dirFile, const char* fileName, uint8_t oflag);
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*/
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uint8_t open(SdFile& dirFile, // NOLINT
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const char* fileName, uint8_t oflag) {
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return open(&dirFile, fileName, oflag);
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}
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/** \deprecated Do not use in new apps */
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uint8_t open(SdFile& dirFile, const char* fileName) { // NOLINT
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return open(dirFile, fileName, O_RDWR);
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}
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/** \deprecated Use:
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* uint8_t SdFile::open(SdFile* dirFile, uint16_t index, uint8_t oflag);
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*/
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uint8_t open(SdFile& dirFile, uint16_t index, uint8_t oflag) { // NOLINT
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return open(&dirFile, index, oflag);
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}
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/** \deprecated Use: uint8_t SdFile::openRoot(SdVolume* vol); */
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uint8_t openRoot(SdVolume& vol) {return openRoot(&vol);} // NOLINT
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/** \deprecated Use: int8_t SdFile::readDir(dir_t* dir); */
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int8_t readDir(dir_t& dir) {return readDir(&dir);} // NOLINT
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/** \deprecated Use:
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* static uint8_t SdFile::remove(SdFile* dirFile, const char* fileName);
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*/
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static uint8_t remove(SdFile& dirFile, const char* fileName) { // NOLINT
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return remove(&dirFile, fileName);
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}
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//------------------------------------------------------------------------------
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// rest are private
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private:
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static void (*oldDateTime_)(uint16_t& date, uint16_t& time); // NOLINT
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static void oldToNew(uint16_t* date, uint16_t* time) {
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uint16_t d;
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uint16_t t;
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oldDateTime_(d, t);
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*date = d;
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*time = t;
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}
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#endif // ALLOW_DEPRECATED_FUNCTIONS
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private:
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// bits defined in flags_
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// should be 0XF
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static uint8_t const F_OFLAG = (O_ACCMODE | O_APPEND | O_SYNC);
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// available bits
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static uint8_t const F_UNUSED = 0X30;
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// use unbuffered SD read
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static uint8_t const F_FILE_UNBUFFERED_READ = 0X40;
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// sync of directory entry required
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static uint8_t const F_FILE_DIR_DIRTY = 0X80;
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// make sure F_OFLAG is ok
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#if ((F_UNUSED | F_FILE_UNBUFFERED_READ | F_FILE_DIR_DIRTY) & F_OFLAG)
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#error flags_ bits conflict
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#endif // flags_ bits
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// private data
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uint8_t flags_; // See above for definition of flags_ bits
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uint8_t type_; // type of file see above for values
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uint32_t curCluster_; // cluster for current file position
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uint32_t curPosition_; // current file position in bytes from beginning
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uint32_t dirBlock_; // SD block that contains directory entry for file
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uint8_t dirIndex_; // index of entry in dirBlock 0 <= dirIndex_ <= 0XF
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uint32_t fileSize_; // file size in bytes
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uint32_t firstCluster_; // first cluster of file
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SdVolume* vol_; // volume where file is located
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// private functions
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uint8_t addCluster(void);
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uint8_t addDirCluster(void);
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dir_t* cacheDirEntry(uint8_t action);
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static void (*dateTime_)(uint16_t* date, uint16_t* time);
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static uint8_t make83Name(const char* str, uint8_t* name);
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uint8_t openCachedEntry(uint8_t cacheIndex, uint8_t oflags);
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dir_t* readDirCache(void);
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};
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//==============================================================================
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// SdVolume class
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/**
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* \brief Cache for an SD data block
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*/
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union cache_t {
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/** Used to access cached file data blocks. */
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uint8_t data[512];
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/** Used to access cached FAT16 entries. */
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uint16_t fat16[256];
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/** Used to access cached FAT32 entries. */
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uint32_t fat32[128];
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/** Used to access cached directory entries. */
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dir_t dir[16];
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/** Used to access a cached MasterBoot Record. */
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mbr_t mbr;
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/** Used to access to a cached FAT boot sector. */
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fbs_t fbs;
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};
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//------------------------------------------------------------------------------
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/**
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* \class SdVolume
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* \brief Access FAT16 and FAT32 volumes on SD and SDHC cards.
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*/
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class SdVolume {
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public:
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/** Create an instance of SdVolume */
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SdVolume(void) :allocSearchStart_(2), fatType_(0) {}
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/** Clear the cache and returns a pointer to the cache. Used by the WaveRP
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* recorder to do raw write to the SD card. Not for normal apps.
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*/
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static uint8_t* cacheClear(void) {
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cacheFlush();
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cacheBlockNumber_ = 0XFFFFFFFF;
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return cacheBuffer_.data;
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}
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/**
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* Initialize a FAT volume. Try partition one first then try super
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* floppy format.
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*
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* \param[in] dev The Sd2Card where the volume is located.
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*
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* \return The value one, true, is returned for success and
|
|
* the value zero, false, is returned for failure. Reasons for
|
|
* failure include not finding a valid partition, not finding a valid
|
|
* FAT file system or an I/O error.
|
|
*/
|
|
uint8_t init(Sd2Card* dev) { return init(dev, 1) ? true : init(dev, 0);}
|
|
uint8_t init(Sd2Card* dev, uint8_t part);
|
|
|
|
// inline functions that return volume info
|
|
/** \return The volume's cluster size in blocks. */
|
|
uint8_t blocksPerCluster(void) const {return blocksPerCluster_;}
|
|
/** \return The number of blocks in one FAT. */
|
|
uint32_t blocksPerFat(void) const {return blocksPerFat_;}
|
|
/** \return The total number of clusters in the volume. */
|
|
uint32_t clusterCount(void) const {return clusterCount_;}
|
|
/** \return The shift count required to multiply by blocksPerCluster. */
|
|
uint8_t clusterSizeShift(void) const {return clusterSizeShift_;}
|
|
/** \return The logical block number for the start of file data. */
|
|
uint32_t dataStartBlock(void) const {return dataStartBlock_;}
|
|
/** \return The number of FAT structures on the volume. */
|
|
uint8_t fatCount(void) const {return fatCount_;}
|
|
/** \return The logical block number for the start of the first FAT. */
|
|
uint32_t fatStartBlock(void) const {return fatStartBlock_;}
|
|
/** \return The FAT type of the volume. Values are 12, 16 or 32. */
|
|
uint8_t fatType(void) const {return fatType_;}
|
|
/** \return The number of entries in the root directory for FAT16 volumes. */
|
|
uint32_t rootDirEntryCount(void) const {return rootDirEntryCount_;}
|
|
/** \return The logical block number for the start of the root directory
|
|
on FAT16 volumes or the first cluster number on FAT32 volumes. */
|
|
uint32_t rootDirStart(void) const {return rootDirStart_;}
|
|
/** return a pointer to the Sd2Card object for this volume */
|
|
static Sd2Card* sdCard(void) {return sdCard_;}
|
|
//------------------------------------------------------------------------------
|
|
#if ALLOW_DEPRECATED_FUNCTIONS
|
|
// Deprecated functions - suppress cpplint warnings with NOLINT comment
|
|
/** \deprecated Use: uint8_t SdVolume::init(Sd2Card* dev); */
|
|
uint8_t init(Sd2Card& dev) {return init(&dev);} // NOLINT
|
|
|
|
/** \deprecated Use: uint8_t SdVolume::init(Sd2Card* dev, uint8_t vol); */
|
|
uint8_t init(Sd2Card& dev, uint8_t part) { // NOLINT
|
|
return init(&dev, part);
|
|
}
|
|
#endif // ALLOW_DEPRECATED_FUNCTIONS
|
|
//------------------------------------------------------------------------------
|
|
private:
|
|
// Allow SdFile access to SdVolume private data.
|
|
friend class SdFile;
|
|
|
|
// value for action argument in cacheRawBlock to indicate read from cache
|
|
static uint8_t const CACHE_FOR_READ = 0;
|
|
// value for action argument in cacheRawBlock to indicate cache dirty
|
|
static uint8_t const CACHE_FOR_WRITE = 1;
|
|
|
|
static cache_t cacheBuffer_; // 512 byte cache for device blocks
|
|
static uint32_t cacheBlockNumber_; // Logical number of block in the cache
|
|
static Sd2Card* sdCard_; // Sd2Card object for cache
|
|
static uint8_t cacheDirty_; // cacheFlush() will write block if true
|
|
static uint32_t cacheMirrorBlock_; // block number for mirror FAT
|
|
//
|
|
uint32_t allocSearchStart_; // start cluster for alloc search
|
|
uint8_t blocksPerCluster_; // cluster size in blocks
|
|
uint32_t blocksPerFat_; // FAT size in blocks
|
|
uint32_t clusterCount_; // clusters in one FAT
|
|
uint8_t clusterSizeShift_; // shift to convert cluster count to block count
|
|
uint32_t dataStartBlock_; // first data block number
|
|
uint8_t fatCount_; // number of FATs on volume
|
|
uint32_t fatStartBlock_; // start block for first FAT
|
|
uint8_t fatType_; // volume type (12, 16, OR 32)
|
|
uint16_t rootDirEntryCount_; // number of entries in FAT16 root dir
|
|
uint32_t rootDirStart_; // root start block for FAT16, cluster for FAT32
|
|
//----------------------------------------------------------------------------
|
|
uint8_t allocContiguous(uint32_t count, uint32_t* curCluster);
|
|
uint8_t blockOfCluster(uint32_t position) const {
|
|
return (position >> 9) & (blocksPerCluster_ - 1);}
|
|
uint32_t clusterStartBlock(uint32_t cluster) const {
|
|
return dataStartBlock_ + ((cluster - 2) << clusterSizeShift_);}
|
|
uint32_t blockNumber(uint32_t cluster, uint32_t position) const {
|
|
return clusterStartBlock(cluster) + blockOfCluster(position);}
|
|
static uint8_t cacheFlush(void);
|
|
static uint8_t cacheRawBlock(uint32_t blockNumber, uint8_t action);
|
|
static void cacheSetDirty(void) {cacheDirty_ |= CACHE_FOR_WRITE;}
|
|
static uint8_t cacheZeroBlock(uint32_t blockNumber);
|
|
uint8_t chainSize(uint32_t beginCluster, uint32_t* size) const;
|
|
uint8_t fatGet(uint32_t cluster, uint32_t* value) const;
|
|
uint8_t fatPut(uint32_t cluster, uint32_t value);
|
|
uint8_t fatPutEOC(uint32_t cluster) {
|
|
return fatPut(cluster, 0x0FFFFFFF);
|
|
}
|
|
uint8_t freeChain(uint32_t cluster);
|
|
uint8_t isEOC(uint32_t cluster) const {
|
|
return cluster >= (fatType_ == 16 ? FAT16EOC_MIN : FAT32EOC_MIN);
|
|
}
|
|
uint8_t readBlock(uint32_t block, uint8_t* dst) {
|
|
return sdCard_->readBlock(block, dst);}
|
|
uint8_t readData(uint32_t block, uint16_t offset,
|
|
uint16_t count, uint8_t* dst) {
|
|
return sdCard_->readData(block, offset, count, dst);
|
|
}
|
|
uint8_t writeBlock(uint32_t block, const uint8_t* dst) {
|
|
return sdCard_->writeBlock(block, dst);
|
|
}
|
|
};
|
|
#endif // SdFat_h
|