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microSD Library for MiniOS7 Based PACs

Model: microSD Library for MiniOS7 Based PACs

The microSD memory expansion features a data logging ability on the MiniOS7 based PACs. The microSD library can operate files on the microSD card that was previously formatted as the standard FAT file system. That means the program on the MiniOS7 based PACs can create a file and log data to the file. When the logging is completed, the user can take out the microSD card and then copy/open files in it to/on the PC.

FAT File System
The FAT file system is an old but very common file system. It can store a max. of 65517 files. Users can create files and then write/append data to it on the MiniOS7 base PACs. Then copy the file to a PC for post analysis when the data is complete logged.

C Language API
Following functions are similar to the functions that turbo C and Borland C provide. This helps users short the learning of using the microSD library.
pc_open, pc_close, pc_read, pc_write, pc_seek, pc_tell, pc_eof, pc_get_errno, pc_format, pc_del, pc_mkdir, pc_rmdir, … etc.

Log data with timestamp
Log data and forward to a FTP server via the Ethernet

Item	Description
microSD Capacities Supported	1GB, 2GB, 4GB, 8GB, 16GB and 32GB microSD card
File system	FAT32 file system only. You can format the microSD card as FAT format on PC or call pc_format to perform the formatting on the MiniOS7 based PACs.
Disk number	1
File number	65,517 files max.
File size	2GB max. for each file
File name	12 bytes max. (8-3 format)
File operation modes	1. Read 2. Write: creates a new file to write data, or overwrite to a file (if the file is already exit). 3. Append: appends data to a file.
File handle	6 max.
Read/Write performance	Hardware: uPAC-5001 Condition 1: 32767 bytes x 10 loops pc_read = 125.3 KB/Sec pc_write = 95.3 KB/Sec Condition 2: 500 bytes x 100 loops pc_read = 47 KB/Sec pc_write = 12 KB/Sec
Max. length of read/write data	32767 bytes

The MiniOS7 based PACs which are equipped a SD or microSD socket, including.


μPAC-5000 series	iP-8000 series	G-4500 series
Other hardware resource occupied: None. The microSD library doesn’t occupy any other hardware resource, such as EEPROM, NVRAM, …, etc.

Item	Description	Location on CD-ROM
Development Tools	Turbo C 2.01 TurboC++ 1.01 Borland C++ 3.01	N/A
SDK	Sd_Vxxx.Lib & microSD.h	CD:\Napdos\uPAC-5000\Demo\Basic\microSD\Lib http://ftp.icpdas.com/pub/cd/8000cd/napdos/upac-5000/demo/basic/microsd/lib/ http://ftp.icpdas.com/pub/cd/8000cd/napdos/ipac8000/demo/basic/ip-84x1_ip-88x1/lib/
API document	The usage of the APIs	Refer the comments in microSD.h
Demo programs	C source code	CD:\Napdos\uPAC-5000\Demo\Basic\microSD\ http://ftp.icpdas.com/pub/cd/8000cd/napdos/upac-5000/demo/basic/microsd/ http://ftp.icpdas.com/pub/cd/8000cd/napdos/ipac8000/demo/basic/ip-84x1_ip-88x1/256mb_flash/

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