sd card data logger

http://blog.csdn.net/dacaozuo/article/details/8156302 Android SD card driver and standard Linux under the SD card driver does not seem to be much different, here on the high-pass Android 2.3 to represent, to briefly analyze the Linux under the SD

Save Bitmap to SD card, save BitmapSD card Public static void saveBitmapInExternalStorage (Bitmap bitmap, Context context) {try {if (IsExternalStorageAvailableAndWriteable () {File extStorage = new File (Environment. getExternalStorageDirectory (). getPath () + "/orimuse"); // orimuse is the next folder on the SD

spix_readwritebyte (u8 txdata) {u8 retry = 0; while (spi_i2s_getflagstatus (spi1, spi_i2s_flag_txe) = reset) // check whether the specified SPI flag is set or not: Send cache empty flag {retry ++; If (retry> 200) return 0 ;} spi_i2s_senddata (spi1, txdata); // send a data retry = 0 through the peripheral Spix; while (spi_i2s_getflagstatus (spi1, spi_i2s_flag_rxne) = reset ); // check whether the specified SPI flag is set: accept the non-empty flag of

SD Card write protection How to remove the solution: Step 1, about the SD card write protection How to remove the problem, you can use the disk repair program to repair the SD card. Open My Computer, locate the

SD_CARD_Write_Sector(u32 addr,u8 *buf);u8 SD_CARD_Read_Sector(u8 *CMD,u8 *buf,u16 n_bytes);u8 SD_CARD_Read_Sector_Start(u32 sector);void SD_CARD_Read_Data(u16 n_bytes,u8 *buf);void SD_CARD_Read_Data_LBA(u32 LBA,u16 n_bytes,u8 *buf);void SD_CARD_Read_Sector_End();u8 SD_CARD_Read_CSD(u8 *buf);u8 SD_CARD_Read_CID(u8 *buf);void SD_CARD_Get_Info(void);void SD_CARD_DEMO(void);#endif /* SD_CARD_H_ */ 5th ~ Six rows: add custom macros to unify the code style. Line 3: Turn On the debug information displ

The SD card uses a fat (File Allocation Table) file system and does not support access mode and permission control. The SD card is suitable for storing large-sized files or files without the need to set access permissions.Android simulators support SD

Data Transmission Mode: The controller uses the FOD clock frequency before the SD card recognition mode ends. In data transmission mode, the Controller may use the FPP frequency. The controller sends an ssend_csd (ipv9) command to obtain the description value in the SD

(!mountpath.contains ("/") | | mountpath.contains ("data")|| Mountpath.contains ("Data")) {Continue}File Mountroot = new file (Mountpath);if (!mountroot.exists () | |!mountroot.isdirectory ()) {Continue}Boolean EQUALSTOPRIMARYSD = Mountpath.equals (extfile. GetAbsolutePath ());if (EQUALSTOPRIMARYSD) {Continue}Paths.add (Mountpath);}catch (IOException e) {TODO auto-generated Catch blockE.printstacktrace ();

As Android learns, when we open the input and output streams of files through openfileinput or openfileoutput of context, all files in the data folder of the application are opened by the program lock, the size of the files stored in this way may be limited-after all, the built-in storage space of the mobile phone is limited. In order to better access the application's big file data, the application needs t

　　after inserting the SD card, the computer prompts the format reason analysis : When the use of multiple reader access to the computer, the SD card will appear on the letter, double-click on the "whether to format" prompts, there may be a problem with the SD

Hippocampus simulator is an Android simulator, we can simulate the setup of the phone's SD card, then if the SD card mirrored file capacity directly to expand, you need to find a way, SD card expansion needs to occupy the computer