Do SD/MMC Card Drive project also has a big six months, always feel that the sum up something. Here, the main is to record some of the more common problems and solutions, so as not to encounter again.
The first is the SD/MMC card initialization error problem. Before finding
operation of files and folders. CC936.C is a simplified Chinese character coding file.
First, configure the file system in Ffconf.h. Change #define_code_page 932 to 936 to support Simplified Chinese, the original default support for Japanese, do not know why, it is written by the Japanese. Do not study first. Compile it and find the following error:
#if!_USE_LFN | | _code_page! = 936
#error This file was n
Author: gooogleman@foxmail.com
Some time ago, songtitan Niu mentioned in the forum how to update NK using SD card. As follows:
Http://topic.csdn.net/u/20081009/17/4E0F5E66-C7A0-43D2-B33F-14E132280F70.html
You can update NK in CE and bootloader.1 under CEYou can directly use the file system API to read NK. Bin and put it into the memory buffer. You can use deviceioctl to call the interface of the NAND drive
https://www.sdcard.org/downloads/formatter_4/eula_mac/Sdformatter mac Edition is an SD card repair tool on Mac OS platform, Sdformatter is a handy SD card format tool, capable of formatting SD memory card and SDHC memory
recognition level logic error)The overall connection, and the circuit matching parameters are as follows:qq20150714100256.png (12.41 KB, download number: 0)Download attachmentsUploaded 5 hours agoThe SD_CLK signal is added to the power board by adding a 33R string resistor and 33p ground capacitance to match (absorb signal emission and slow signal rise time, add RC terminal match (absorb transmit and echo) on SD
Just got a raspberry pie from Simon's classmate--Prepare a 4GB SD card, ready to run Linux.
Use tool Win32diskimager on Windows 7 to write an IMG to SD card, error, failure.
Fortunately I have Linux VMware virtual machines, on the virtual machine, execute command sudo dd bs
, "/system/etc/vold.fstab");Show_progress (0.6,0);Ui_print ("Ye unmount/system");Unmount ("/system");Show_progress (0.8,0);Ui_print ("Ye finished!");Show_progress (1.0,0);================================================================================Error CodesSometimes when flashing a ZIP, clockworkmod Recovery would stop with an error code.Status 0This was usually caused by a incompatible update-binary i
partition table.
Warning: re-reading the Partition Table failed with error 16: the device or resource is busy.
The kernel still uses the old table. The new table will be used
The next reboot or after you run partprobe (8) or kpartx (8)
Warning: If you have created or modified any DOS 6.x
Partitions, please see the fdisk manual page for additional
Information.
Syncing disks.
Save and exit. I thought it would be done at this step. Otherwise there will
The raspberry pi system installs Linux and raspberrypi on the SD card.
I just got a raspberry pi borrowed by Simon and prepared a 4 GB SD card for Linux.
On Windows 7, use the tool Win32DiskImager to write img to the SD card. An
through MTP or large storage mode.After the download, copy the downloaded ZIP file from the computer to the SD card of the mobile phone or flash memory of the mobile phone (depending on the mobile phoneIf the mobile phone's primary storage is an SD card, it is copied to the SD
When there is a built-in SD card and the shared SDcard feature is not turned on, some customer resources need to be provisioned in the SD card.These resources end user visible and can also be deleted. After the resource has been deleted by user, the factory reset function is performed and the provisioned resources need to be restored.1. Pre-provision the same res
Android NDK loads so in SD card
Recently, the company's framework has just been transplanted. Since the framework program needs to call subroutines, each subroutine is a so file, with hundreds of so files. It is unrealistic to package all the so and apk files, timely upgrade and maintenance are also troublesome. So you need to put it in the SD
A picture upload function needs to provide upload pictures in the SD card path, summed up some of the online columns, modified a bit, the code is very simple, interested friends can refer to ha, I hope to help you
Recently in doing a picture upload function, you need to provide upload pictures in the SD card path, on
SD card driver recently writtenProgram. After reading datasheet, sort it as follows:
The first thing you need to know is:SD card ProtocolAndHarddisk (File System)Block and sectorIt does not mean anything.
For sdks, see "Maid physical_layer_simplified_specification_ver_3.020.final_100518.pdf" (click to download)
The meanings of block and sector in the
After the source code of 2.3 is downloaded and compiled, the boot simulator usually does not have a storage card (SD card) mounted, which leads to a problem: many tests that require the SD card cannot be done, for example, you want to use traceview to track your program (you
Open the Eclipse.exe main program of the desktop and come directly to his homepage.
Locate the window----Show view----Other button on the top of the tool
After opening, we click on Android to expand him.
After you expand, double-click the File Explorer tab below
The File Explorer tab will appear below
In the bottom we double click on the mnt---sdcard tab
With the SDcard tab selected, we click the button in the top right corner
Select Local songs, here we hint, we can only choose En
Bootfile
The default download file
Bootargs
boot parameters passed to the kernel
Bootcmd
commands executed at auto-start
ServerIP
server-side IP address
IPAddr
local IP address
Stdin
Standard input Devices
StdOut
Standard output Devices
StdErr
standard error Device
Above is just some of t
The upload function of an image must provide the path of the uploaded image in the SD card, summarize some columns on the Internet, and modify the code. For more information, see, hope to help you
Recently, I am working on an image upload function. I need to provide the path for uploading images to the SD card. I have
Reference http://shumeipai.nxez.com/2014/05/18/raspberry-pi-under-mac-osx-to-install-raspbian-system.html(/DEV/DISK1S1 is a partition,/dev/disk1 is a block device,/dev/rdisk1 is a raw character device)The following error occurs when you write the image to the SD card under Mac dd: invalid number ‘4m‘ ,Workaround from Http://www.raspberrypi.org/documentation/insta
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,
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