Mikroelektronika MIKROE-738 Datenbogen

mikroC PRO for PIC32

MikroElektronika

287

The Compact Flash Library provides routines for accessing data on Compact Flash card (abbr. CF further in text). CF 

cards are widely used memory elements, commonly used with digital cameras. Great capacity and excellent access 

time of only a few microseconds make them very attractive for microcontroller applications.

In CF card, data is divided into sectors. One sector usually comprises 512 bytes. Routines for file handling, the 

Cf_Fat

 

routines, are not performed directly but successively through 512B buffer.

Important: 

 

- Routines for file handling can be used only with FAT16 file system. 

 

- Library functions create and read files from the root directory only. 

 

- Library functions populate both FAT1 and FAT2 tables when writing to files, but the file data is being read  

 

  from the FAT1 table only; i.e. there is no recovery if the FAT1 table gets corrupted. 

 

- If MMC/SD card has Master Boot Record (MBR), the library will work with the first available primary  

 

  (logical) partition that has non-zero size. If MMC/SD card has Volume Boot Record (i.e. there is only one  

 

  logical partition and no MBRs), the library works with entire card as a single partition. For more information  

 

  on MBR, physical and logical drives, primary/secondary partitions and partition tables, please consult other  

 

  resources, e.g. Wikipedia and similar. 

 

- Before writing operation, make sure not to overwrite boot or FAT sector as it could make your card on PC  

 

  or digital camera unreadable. Drive mapping tools, such as Winhex, can be of great assistance.  

Library Dependency Tree