This paper is suitable for fs4412 Development Board, the kernel used is linux4.9.9.1. Modify the device tree
VI Arch/arm/boot/dts/exynos4412-liebao.dts
Modify:
sdhci_2 {
bus-width =
2. Configure the Kernel
Make Menuconfig
2.1 Configuration SD Card Driver
Device Drivers--->
2.2 Support for file systems
File Systems--->
dos/fat/nt filesystems--->
2.3 Native language Encoding support
-*-Native Langu
I found that I could not write files to the USB flash drive/SD card today. I carefully checked that the USB flash drive is read-only. I tried to solve this problem using n methods:
1. chmod U + x/Media/usbdisk
The prompt "read-only file system" cannot be changed.
2. sudo Mount-o rw-O remount-o User-T vfat/dev/sdb1/Media/usbdiskA prompt is displayed for the read-only file system.
3. Formatting also promp
--------------------
The script is first extended and then formatted. One fat extension and one ext3 Partition
-------------------
#! /Bin/sh## Partition and format the SD card script# Usage mksdboot. Sh -- device/dev/SDB
Version = "0.1"
Execute (){$ *>/Dev/nullIf [$? -Ne 0]; thenEchoEcho "error: executing $ *"EchoExit 1Fi}
Version (){EchoEcho "'basename $ 1' version $ version"Echo
Exit 0}
Usage (){Echo"Usa
Solution:1. Supports Micro SD memory cards, but does not support standard SD cards2. The MIIX700-12isk supports a maximum of GB Micro SD memory card. Because the Micro SD memory card involves multiple brands, we recommend that you
related applications in your device generally support the following file formats:
• Music: mp3, M4A, MP4, 3GP, 3GA, WMA, OGG, OGA, AAC and FLAC.
• Image: bmp, GIF, JPG, and PNG.
• Video: 3gp, MP4, AVI, WMV, FLV and mkv.
• File: doc, docx, xls, xlsx, ppt, pptx, pdf and txt.
In addition, some file formats are not supported and may be related to the software version of your device. Please download kiesfrom Samsung tocheck the current software version of the device to upgrade the lat
This article is translated from https://www.securecoding.cert.org/confluence/display/java/DRD00-J.+Do+not+store+sensitive+information+on+ External+storage+%28sd+card%29+unless+encrypted+first, there are additional deletions.Android offers several options for saving persistent application data, one of which is external storage (/sdcard,/mnt/sdcard). The external storage contains a miniature or standard-sized SD
The first few days encountered a problem: Save the image to the SD card in the Android development app, and the user searched in the gallery, similar to the form of the cache. The first idea is to change the suffix name, for example, to save a picture as Image1.txt, so save of course no problem, but in the application of reading in the not, and later did not study why not read normally, after all, this meth
In this section, we do a very simple demo that allows you to read an image from an SD card and display it in the app.In three steps:1. Set permissions. Add three lines of permission information to the manifest file. uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/> uses-permission android:name="an
A teammate's SD card, which was used on his mobile phone, was suddenly unavailable after several TXT e-books were imported into the computer. The symptoms were unrecognizable. On the PC, the card reader shows "Windows prompts formatting, but cannot complete formatting". After the attribute is displayed, the file system type is raw.
At first, I wanted to solve th
After completing the above preparations, the following describes how to encrypt the SD card:1. Click application on the standby page ].2. Click set ].3. Move the screen up and select security ].4. Select encrypt external SD card ].5. Check the required items based on your actual needs. Here, select encryption as an exa
1. To back up your contacts I'll go back to my mobile desktop and then click on the "Contacts" icon.2. In the contact us click on the three-point box, such as the Red Box "menu."3. Then we click on the three point after the pop-up menu, here we click on the Drop-down menu "set."4. Okay, let's get into the setup. We find "contact" and click on Enter, as shown in the following figure.
5. OK here we will see an "import/export" We click on it and then click "Export to
Many friends are not familiar with the WP8 mobile phone network, so we must use QQ Address book to back up, comb contacts. Here to share with you how to use the SD card to import contacts.
First, connect the phone to the computer into the SD card to create a folder--backup--dta--condact
1, computer login QQ
My Beaglebone black before installing the Ubuntu 14.04 System, the use of the process found in the Ubuntu system under the serial device TTYS1~TTYS5 can not be used, open the serial port will show input/output error, I guess there may be no driver or any other reason, younger brother compared vegetables, so did not find the reason, also did not solve.My solution is to brush back to the factory is the operating system Debian, to the Beaglebone website, the latest version of the current is 8.4. Do
Recently, the status of external storage devices needs to be monitored in the project, so this note has been collated for later viewing.Broadcasts emitted when the state of an external storage device changesCompare broadcasts in different states1. When inserting an external SD card:2. When removing an external SD card:
each time through the output stream to the SD card to write files, connected to the computer, using MTP to simulate a mobile disk, open the disk but there is no such a file, and the way to see through the ADB, the cause of this phenomenon is that after each write, the MTP database is not updated, Because the update of the MTP database requires a large price ratio, so only in the restart, mount and the user
each time through the output stream to the SD card to write files, connected to the computer, using MTP to simulate a mobile disk, open the disk but there is no such a file, and the way to see through the ADB, the cause of this phenomenon is that after each write, the MTP database is not updated, Because the update of the MTP database requires a large price ratio, so only in the restart, mount and the user
Each time through the output stream to the SD card to write files, connected to the computer, using MTP to simulate a mobile disk, open the disk but there is no such a file, and the way to see through the ADB, the cause of this phenomenon is that after each write, the MTP database is not updated, Because the update of the MTP database requires a large price ratio, so only in the restart, mount and the user
Recently, when working on the andoird project, we often encounter different machine models on the client side, resulting inProgramThere is a bug problem, and we cannot locate the exact location of this bug (because there is no log file ).
So I found the relevant information about writing program logs to the SD card, just like the Web log4j, to generate a log file to the
How do I add files to the SD card on the android simulator mobile phone?
Add a file directly to the SD card of the simulator in ddms. If an error occurs, such as: failed to push xxxxx.txt on emulator-: Read-Only file system, the error occurs because your sdcard permission is insufficient, you need to create an sdcard d
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