DOSFS questions/comments

Started by John Williams in comp.arch.embedded10 years ago 5 replies

Hello, We are working on a project that is using the Larwe DOSFS 1.03 library, over an SD/MMC card in a standalone embedded platform. I have...

Hello, We are working on a project that is using the Larwe DOSFS 1.03 library, over an SD/MMC card in a standalone embedded platform. I have implemented a generic buffer cache between DOSFS and the physical media, which works well and gives the expected performance improvements. The access pattern in this application is typically just sequential writes of ~3MB files. However, we've...


DOSFS 1.02 release and feature announcement

Started by larwe in comp.arch.embedded11 years ago

For anyone who is interested, I just uploaded a bugfix release to DOSFS, my free FAT12/16/32 filesystem. These fixes address bugs reported...

For anyone who is interested, I just uploaded a bugfix release to DOSFS, my free FAT12/16/32 filesystem. These fixes address bugs reported by various users. It has only taken about seven months for me to update the readme.txt and strip the proprietary information out of the fixed sourcefiles, which isn't too bad for me :) - DFS_Seek would not correct


DOSFS from LARWE question?

Started by Anonymous in comp.arch.embedded11 years ago 5 replies

Hi everybody- I am attempting to experiment with DOSFS from Lewin Edwards. The chosen platform for my experiements is Windows. I'm running...

Hi everybody- I am attempting to experiment with DOSFS from Lewin Edwards. The chosen platform for my experiements is Windows. I'm running into a stumbling block that I'm sure has an easy solution: When compiling for testing using the HOSTVER macro defined, how does one create the initial image file with which the test program uses for mass storage? There is a small hint that a utilit...


LARWE's dosfs

Started by Will Dean in comp.arch.embedded10 years ago 10 replies

Hi, Are there many people around on the group who are actually using LARWE's dosfs in real apps? I rather like its general style, and the...

Hi, Are there many people around on the group who are actually using LARWE's dosfs in real apps? I rather like its general style, and the code seems pretty good quality, but I'm actually starting to suspect it's pretty buggy. Things I've noticed so far include: Bug in root-directory allocation for new items in a root directory (this was mentioned in here last year by someone who ...


SD card and FAT32 (dosfs and fat_io)

Started by John Speth in comp.arch.embedded3 years ago 3 replies

Hi folks, I need to utilize a known-to-work FAT16/32 library for reading SD cards. I'm seeing peculiar boot record data that doesn't make...

Hi folks, I need to utilize a known-to-work FAT16/32 library for reading SD cards. I'm seeing peculiar boot record data that doesn't make any sense to me. I'm hoping somebody here has preceded me in getting SD cards readable with FAT FS libraries. We've used both dosfs and fat_io (both free to use from the web) with success on USB flash drives and rotating magnetic drives. Now th...


SD Card FAT support issues (dosfs, fatfs,fatlib)

Started by Peter Dickerson in comp.arch.embedded11 years ago 49 replies

OK, firstly I should say that I'm aware there has been recent discussion of embedded FAT here. I have looked at Lewin Edwards' DOSFS 1.01, FatFS...

OK, firstly I should say that I'm aware there has been recent discussion of embedded FAT here. I have looked at Lewin Edwards' DOSFS 1.01, FatFS R0.02a and Sham's Fatlib v2.0. I have an ARM7 based instrument that already is in production but would like to a support for external memory cards to store measurement data and configuration. The system only has 128K RAM and 4 MByte Flash internall...


Sample DOSFS disk image file for testing

Started by John Speth in comp.arch.embedded9 years ago 20 replies

Hi Everybody- I downloaded and built Lewin Edwards' DOSFS package. It builds without a flaw. I would love to get up and running quickly for...

Hi Everybody- I downloaded and built Lewin Edwards' DOSFS package. It builds without a flaw. I would love to get up and running quickly for desktop testing but the disk image file is missing from the package and that requires me to build my own. I'm very unknowledgeable about FAT file systems. That fact makes it difficult for me to create one from scratch. Would anyone have a s...


Dosfs and 8G SDHC card

Started by TonyDeng in comp.arch.embedded6 years ago 8 replies

Hi All, I am writing a data logging firmware using dosfs. The size of data I am logging is more than 10Meg. I tested the firmware with 2G SD...

Hi All, I am writing a data logging firmware using dosfs. The size of data I am logging is more than 10Meg. I tested the firmware with 2G SD card and 4G SDHC card. Both of these cards are working properly. When I put these cards into my PC I can read the filenames and creation dates. However, when I tested the same firmware against a 8G SDHC card, after logging about 1Meg of data, the DFS_Write...


SD-MMC writing FAT

Started by Rocky in comp.arch.embedded11 years ago 6 replies

Hi All, I am starting some work that would be using an SD card (in MMC-SPI mode) and I was hoping to use a PIC or similar low memory...

Hi All, I am starting some work that would be using an SD card (in MMC-SPI mode) and I was hoping to use a PIC or similar low memory chip. The idea was to use Lewin Edward's DOSFS (www.zws.com) as it only requires about 1KB RAM. The problem is that according to the SANDISK spec one can do sector writes of 512 bytes, but that an erase will operate on 32 sectors. This means that to upda...


Q: Free embedded FAT32 or NTFS filesystem

Started by JeGy in comp.arch.embedded8 years ago 22 replies

Hi, I am looking for a FAT32 or NTFS filesystem for embedded projects. I expect that the source code is written C and free of...

Hi, I am looking for a FAT32 or NTFS filesystem for embedded projects. I expect that the source code is written C and free of charge Goggle helped me to find "DOSFS" from ZWS.COM. As it is not possible for me to unpack the file which I downloaded, it is not possible tp make a proper evaluation. Any one have the project in a readable format? Do you know other free embedded FAT...