From e4af5e82f26fab59bb2bda540e1673317f48ce8a Mon Sep 17 00:00:00 2001 From: kliment Date: Mon, 4 Jul 2011 16:17:19 +0200 Subject: Rename to Sprinter --- Tonokip_Firmware/SdFatmainpage.h | 202 --------------------------------------- 1 file changed, 202 deletions(-) delete mode 100644 Tonokip_Firmware/SdFatmainpage.h (limited to 'Tonokip_Firmware/SdFatmainpage.h') diff --git a/Tonokip_Firmware/SdFatmainpage.h b/Tonokip_Firmware/SdFatmainpage.h deleted file mode 100644 index 73b3b63..0000000 --- a/Tonokip_Firmware/SdFatmainpage.h +++ /dev/null @@ -1,202 +0,0 @@ -/* Arduino SdFat Library - * Copyright (C) 2009 by William Greiman - * - * This file is part of the Arduino SdFat Library - * - * This Library 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. - * - * This Library 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 the Arduino SdFat Library. If not, see - * . - */ - -/** -\mainpage Arduino SdFat Library -
Copyright © 2009 by William Greiman -
- -\section Intro Introduction -The Arduino SdFat Library is a minimal implementation of FAT16 and FAT32 -file systems on SD flash memory cards. Standard SD and high capacity -SDHC cards are supported. - -The SdFat only supports short 8.3 names. - -The main classes in SdFat are Sd2Card, SdVolume, and SdFile. - -The Sd2Card class supports access to standard SD cards and SDHC cards. Most -applications will only need to call the Sd2Card::init() member function. - -The SdVolume class supports FAT16 and FAT32 partitions. Most applications -will only need to call the SdVolume::init() member function. - -The SdFile class provides file access functions such as open(), read(), -remove(), write(), close() and sync(). This class supports access to the root -directory and subdirectories. - -A number of example are provided in the SdFat/examples folder. These were -developed to test SdFat and illustrate its use. - -SdFat was developed for high speed data recording. SdFat was used to implement -an audio record/play class, WaveRP, for the Adafruit Wave Shield. This -application uses special Sd2Card calls to write to contiguous files in raw mode. -These functions reduce write latency so that audio can be recorded with the -small amount of RAM in the Arduino. - -\section SDcard SD\SDHC Cards - -Arduinos access SD cards using the cards SPI protocol. PCs, Macs, and -most consumer devices use the 4-bit parallel SD protocol. A card that -functions well on A PC or Mac may not work well on the Arduino. - -Most cards have good SPI read performance but cards vary widely in SPI -write performance. Write performance is limited by how efficiently the -card manages internal erase/remapping operations. The Arduino cannot -optimize writes to reduce erase operations because of its limit RAM. - -SanDisk cards generally have good write performance. They seem to have -more internal RAM buffering than other cards and therefore can limit -the number of flash erase operations that the Arduino forces due to its -limited RAM. - -\section Hardware Hardware Configuration - -SdFat was developed using an - Adafruit Industries - Wave Shield. - -The hardware interface to the SD card should not use a resistor based level -shifter. SdFat sets the SPI bus frequency to 8 MHz which results in signal -rise times that are too slow for the edge detectors in many newer SD card -controllers when resistor voltage dividers are used. - -The 5 to 3.3 V level shifter for 5 V Arduinos should be IC based like the -74HC4050N based circuit shown in the file SdLevel.png. The Adafruit Wave Shield -uses a 74AHC125N. Gravitech sells SD and MicroSD Card Adapters based on the -74LCX245. - -If you are using a resistor based level shifter and are having problems try -setting the SPI bus frequency to 4 MHz. This can be done by using -card.init(SPI_HALF_SPEED) to initialize the SD card. - -\section comment Bugs and Comments - -If you wish to report bugs or have comments, send email to fat16lib@sbcglobal.net. - -\section SdFatClass SdFat Usage - -SdFat uses a slightly restricted form of short names. -Only printable ASCII characters are supported. No characters with code point -values greater than 127 are allowed. Space is not allowed even though space -was allowed in the API of early versions of DOS. - -Short names are limited to 8 characters followed by an optional period (.) -and extension of up to 3 characters. The characters may be any combination -of letters and digits. The following special characters are also allowed: - -$ % ' - _ @ ~ ` ! ( ) { } ^ # & - -Short names are always converted to upper case and their original case -value is lost. - -\note - The Arduino Print class uses character -at a time writes so it was necessary to use a \link SdFile::sync() sync() \endlink -function to control when data is written to the SD card. - -\par -An application which writes to a file using \link Print::print() print()\endlink, -\link Print::println() println() \endlink -or \link SdFile::write write() \endlink must call \link SdFile::sync() sync() \endlink -at the appropriate time to force data and directory information to be written -to the SD Card. Data and directory information are also written to the SD card -when \link SdFile::close() close() \endlink is called. - -\par -Applications must use care calling \link SdFile::sync() sync() \endlink -since 2048 bytes of I/O is required to update file and -directory information. This includes writing the current data block, reading -the block that contains the directory entry for update, writing the directory -block back and reading back the current data block. - -It is possible to open a file with two or more instances of SdFile. A file may -be corrupted if data is written to the file by more than one instance of SdFile. - -\section HowTo How to format SD Cards as FAT Volumes - -You should use a freshly formatted SD card for best performance. FAT -file systems become slower if many files have been created and deleted. -This is because the directory entry for a deleted file is marked as deleted, -but is not deleted. When a new file is created, these entries must be scanned -before creating the file, a flaw in the FAT design. Also files can become -fragmented which causes reads and writes to be slower. - -Microsoft operating systems support removable media formatted with a -Master Boot Record, MBR, or formatted as a super floppy with a FAT Boot Sector -in block zero. - -Microsoft operating systems expect MBR formatted removable media -to have only one partition. The first partition should be used. - -Microsoft operating systems do not support partitioning SD flash cards. -If you erase an SD card with a program like KillDisk, Most versions of -Windows will format the card as a super floppy. - -The best way to restore an SD card's format is to use SDFormatter -which can be downloaded from: - -http://www.sdcard.org/consumers/formatter/ - -SDFormatter aligns flash erase boundaries with file -system structures which reduces write latency and file system overhead. - -SDFormatter does not have an option for FAT type so it may format -small cards as FAT12. - -After the MBR is restored by SDFormatter you may need to reformat small -cards that have been formatted FAT12 to force the volume type to be FAT16. - -If you reformat the SD card with an OS utility, choose a cluster size that -will result in: - -4084 < CountOfClusters && CountOfClusters < 65525 - -The volume will then be FAT16. - -If you are formatting an SD card on OS X or Linux, be sure to use the first -partition. Format this partition with a cluster count in above range. - -\section References References - -Adafruit Industries: - -http://www.adafruit.com/ - -http://www.ladyada.net/make/waveshield/ - -The Arduino site: - -http://www.arduino.cc/ - -For more information about FAT file systems see: - -http://www.microsoft.com/whdc/system/platform/firmware/fatgen.mspx - -For information about using SD cards as SPI devices see: - -http://www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf - -The ATmega328 datasheet: - -http://www.atmel.com/dyn/resources/prod_documents/doc8161.pdf - - - */ -- cgit v1.2.1