EmbeddedLinux Bare Metal Development (12)--inand Introduction First,Inand Introduction in and is a memory chip developed by SanDisk company, which can be considered as an SD card or MMC card chip. Inand is the SanDisk company complies with the EMMC protocol chip family name, the internal use of MLC storage particles. The Inand interface circuit is designed to be complex and fully functional, providing a
://www.datafabusa.com/;Obviously, this option is not related to our purpose. First it is specifically for Datafab company's products, and second, although CompactFlash reader is a flash device, but obviously not a U disk. Because the code in the Drivers/usb/storage directory is for a device such as the USB mass storage, not for a particular device. The USB flash drive is just one of the mass storage devices. Another example:101 Config Usb_storage_sddr55102 bool "
called hard disks.Partition Table. Hard DiskPartition TableContains four items, each of which is 16 bytes, representing the parameters of the four partitions.Partition TableThe meaning of each byte is as follows:
Offset meaning
0 auto-Raising flag (80 is the active partition, 00 is the non-active partition)
1 starting head number H
2 start fan ID s
3. Start cyl (the CYL's 2-bit high is stored in the second byte's 2-bit high)
4 partition format flag (05: DOS extended; 06: bigdos fat16;07: NTFS;
support (EXPERIMENTAL )"Depends on USB_STORAGE EXPERIMENTALHelpSupport for certain Datafab CompactFlash readers.Datafab has a web page
.
Obviously, this option has nothing to do with us. first, this is specifically for Datafab products, and second, CompactFlash reader is a flash device, but this is obviously not a U disk, because the code in the drivers/usb/storage directory is for a type of devices, not a specific device, such devices are USB Mass Storage devices. For this type of equi
8 points on the same screen to read specific areas of the photo to achieve the desired precise effect and to use exposure locking.Central weighted average metering: Based on the average metering, in the picture Center or near the screen according to different weighting coefficients to calculate, with the center of the maximum weight, the more the edge of the picture, the smaller the weighting. The final value is the metering value.Storage Media section:CF card: CF card was first launched by
environments (or even when the light conditions are very bad. It ensures that accurate exposure results can be achieved in the case of backlight or high contrast. (Olympus proprietary technology)Point metering system: you can measure the light at up to 8 points on the same screen to read a specific area of the photo to get the expected exact effect and use the exposure lock.Center weighted average light measurement: based on the average light measurement, images in the center or near area are c
Recently saw some netizens often ask TF card and SD card difference, then should distinguish?
Difference between TF card and SD card 1: Appearance distinction
SD card volume is 24mmx32mmx2.1mm.
TF card volume is 15mmx11mmx1mm.
Difference between TF card and SD card 2: Name distinction
SD card is secure Digital Memory card, Chinese translation for security digital cards.
The TF card, known as T-flash and microSD, is a memory card. later renamed as TransFlash. The reason for re
U disk for the office is absolutely familiar with the office equipment, it is easy to use simple operation, we pass the document is essential, a small u disk can bring us such a great convenience, in fact, in the real use of the process of the U disk is not simple operation principle. such as file system setup This thing has a lot of learning,FAT32, ExFAT, NTFS, what is the difference between you know?A: What is F
1. fdisk introduction;
Fdisk-Partition Table Manipulator for Linux, translated into Chinese means the disk partition table operation tool; I did not translate very well and did not read the Chinese documentation; in fact, it is actually a partition tool;
Fdsik can divide disks into Several partitions and specify the partition file system for each partition, for example, Linux, FAT32, Linux, Linux swap, fat16, and file systems of Unix-like operating sy
Author: North South
From: linuxsir. org
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Abstract: fdisk is a powerful partitioning tool and one of the most popular tools in UNIX operating systems. It is a time-honored partition tool. This article only introduces its simplest partitioning operation functions;1. fdisk introduction;Fdisk-Partition Table Manipulator for LinuxIn Chinese, it means the disk partition table operation tool. I did not translate very well and did not read the Chinese documentation. I
[69.853668]usbusb2:manufacturer: linux2.6.37-05branchmusb-hcd [69.860137]usbusb2: serialnumber:musb-hdrc.0 [69.872558]hub2-0:1.0:usb hubfound [69.876647]hub2-0:1.0:1portdetected Root@rfodncc:/mnt#[70.169555]g_file_storagegadget:high speedconfig #1
Connect USB to PC, you can see the PC side of the SD card partition directory.
Ps:insmod G_file_storage.ko file=/dev/mmcblk0 stall=0 removable=1 and Insmod G_file_storage.ko a little different, Follow-up can be found to understand the specific role
:1.0: USB hub found [69.876647] hub 2-0:1.0:1 Port detected root@rfodncc:/mnt# [70.169555] g_file_storage gadget: High Speed config #1
Connect USB to PC, you can see the PC side of the SD card partition directory.
Ps:insmod G_file_storage.ko file=/dev/mmcblk0 stall=0 removable=1 and Insmod G_file_storage.ko a little different, Follow-up can be found to understand the specific role of stall and removable.
Then make an embedded device-side FAT32 file
.png "style=" Float:none; "alt=" wkiom1ux_oogol_eaagkcyii69q735.jpg "src=" http:/ S3.51cto.com/wyfs02/m01/5b/f9/wkiom1ux_oogol_eaagkcyii69q735.jpg "/>Think and answer questions1. describe the differences between the FAT,FAT32 , and NTFS file systems. before the introduction of the FAT32 file system, the file system used by the PC is usually FAT16. Like based onMS-DOS, Win 95 and other systems have adopted
FdiskIt is a powerful partitioning tool and one of the most popular tools in UNIX operating systems. It is a time-honored partition tool. This article only introduces its simplest partitioning operation functions;
I. fdiskIntroduction;
Fdisk-Partition Table Manipulator for LinuxIn Chinese, it means the disk partition table operation tool. I did not translate very well and did not read the Chinese documentation. It is actually a partition tool; fdsikYou can divide a disk into Several partitio
This article is written in very detailed, particularly good
Fdisk-lYou can list all partitions, including partitions and USB devices that are not hung. I usually use this to find the location of the partitions that need to be mounted, such as hanging a U-disk.Example of how to use Fdisk partitioning in Linux: http://linux.chinaitlab.com/set/39459.htmlNote: fdisk-l lists all the partitionsFirst, the introduction of Fdisk;Fdisk-partition table manipulator for Linux, translated into Chinese me
install a software, I am prompted that A. So file is missing and the installation cannot continue. What should I do?
A: The. So file is a library file, just like the. dll file in windows. The normal installation and running of a program requires the support of specific library files. So you need to find the package containing this. So. Go to the http://www.rpmfind.net and use the one you lack... to fight the hacker? RPM package
14. When I access a Windows partition, I find that all the Chinese
D disk after I started it with a DOS boot disk. After I restarted it, the hard disk could not enter the system. After checking that the data on the d disk was still there, the data on the C disk would be gone ." I believe it will get confused. Next we will use an experiment to solve this fault. For convenience, for win2000 (nt5.0), WINXP (nt5.1), and win2003 (nt5.2), we will refer to "NT System" below "; the "dos boot disk" refers to the DOS boot disk (msdos7.1) of Win98, which we currently use
Windows, you can use the ACL (Access Control List) set in the Security tab to perform detailed file access permission control. For Windows XP systems, Microsoft has introduced a new file sharing method to meet the entertainment needs of home users, namely, simple file sharing ". For a machine with "simple file sharing" enabled, the "Security" tab does not exist in the "properties" Window of its files or folders, after Windows XP is installed, the "simple file sharing" function is enabled by def
MBR. Starting from 1 beh bytes, a total of 64 bytes are occupied, including four Partition Table items, which is why the sum of the primary and extended partitions of a disk can only be four. The length of each partition table item is 16 bytes, it contains the pilot flag of a partition, the system flag, the start and end of the cylinder number, the sector number, the head number, and the number of sectors before the partition and the number of sectors occupied by the partition. The "pilot flag"
Overview:1. Copy the installation image and boot file to the FAT32 partition2. Find out the partition number of the FAT32 partition and modify the boot configuration file3. Launch the installation image of the FAT32 partition and start the installationUEFI Win7/8/ubuntu Hard Drive installation Ubuntu14.04 return to catalog next lessonUEFI can identify the EFI fil
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