事实上我还对我这次的工作还不是很清楚 :roll:
大概就是我要把一些从一个fifo队列中读出来的数据(这个队列是在一个没有操作系统的单片机上,而读出来的数据自然也没有任何的文件格式,只是一个一个的字)写到一个u盘上,而且是要按照fat16的格式写,以便于linux系统或者说windows系统能够读出里面的数据.可能就是这个样子了.
我还不知道怎么下手,郁闷!
内核中fat16 support的源码是哪个呢?我看linux/fs下面有个fat文件夹,但是我看里面的内容好象和我的东西没有关系啊!希望Dragonfly大哥能够指点一下!
thanx!
btw:你的博士论文进度如何了? :-):-)
忙的时候到了，学位要紧 :-D
*if u read data from a fifi queue, can u read it at user space? if so, then write it as a normal file.
*if u have to read at kernel space, check LTT to see how to transfer the data to user space and then write use file operations.
*if u do not know what is LTT, try to do file write operation at kernel level.
anyway, u need not to operate on fat directly.
my project manager tell me that he want me to study the file system, in order that i cannt perform the ATA driver in the future. hoho..........
now i am finding the fat16 official document and the source code for fat16.
i am not so familiar with the linux source code, could u tell me which source code or doc is for fat16?
thanx,Dragonfly "dage"!!
fat is beyond block device layer. so you can not know how to operate on ata directly via study fat16.
http://www.ntfs.com/fat-systems.htm. and there are many sites have content on fat.
/usr/src/linux/Documentation/filesystems/vfat.txt also has some on vfat.
there are four fs related with fat in kernel.
<*> DOS FAT fs support
│ │ <*> MSDOS fs support
│ │ <*> UMSDOS: Unix-like file system on top of standard MSDOS fs
│ │ <*> VFAT (Windows-95) fs support
all under /usr/src/linux/fs/fat/*
but if u are not familiar with kernel source, u will have trouble to understand them. u had better read chapter 12 in ULK2 and chapter 5 in QJFX to know some about vfs in linux.
good luck.
hoho, i have downloaded these two books, while i havent read them by now.
thanks for remind me !
good luck, too!
Merry Mid-autumn Festival to you!!!hoho
thx. i have a busy day and eat a mooncake.
:-D
hoho
u can buy mooncake there? or someone posted it to u from China?!
hehe, america is not as what u assumed. so the communication is important.
i live in a small town. we have a chinese food store (oriental market) about 1.5 mile (1 mile =1.6 km) away. each friday, the store operator will go to NY and get some chinese food and vegetable for us. the price is of course expensive than in china, but at least u can get it.
the ny china town are full of chinese people, and it looks like a huge "cai shi chang" in a china city, with some hotels and resturants. maybe oneday when i go to there, i can take some pictures and show you.
really?hoho, i am waiting for ur pictures now!
the china town, the "cai shi chang"?! i really expect to see that.
sure. next time i go ny or boston. i took some picutures.
Are the two cites near by?
then what about LA? will you go there sometime? Although i know it's far from NY. hoho
boston to ny 210 miles
la? too far away.
show u some pictures, about Longwood Garden and Acadia National Park. u can get intro about them from web by searching use the name.
http://crab.ele.uri.edu/publicpic
hoho, they are so beautiful!!!
have u ever been there?
Dragonfly大哥,又有一个问题要问你了
我的文件系统的删除和格式化功能不知道该怎么弄呢
我觉得是不是就是把fat表中要删除的那一项修改成空白或者是什么就可以了?那格式化是不是就是把整个分区的fat表全部修改为空白或是什么?
反正现在感觉比较乱,不知道怎么下手呢
我在内核里面找了一下也没有找到关于关于fat文件系统的删除及格式化功能的代码,想参考一下都不行!郁闷中
希望Dragonfly大哥能给点提示啊!?
thanx!