B&B Electronics Parallel Printer Card PIOC Uživatelský manuál stáhnout pdf (Strana 42)

GHI Electronics,LLC USBwiz User Manual

USBwiz Command Set

subdirectories.

Format RD<SP>foldername<CR>

!00<CR>

Example RD<SP>MYFOLDER<CR>

!00<CR>

Remove the folder with name

MYFOLDER

OF - Open a file for read, write or append

To open a file for read, write or append in the current Folder, use OF command. The

command require a file handle and the access mode.

Open Modes are:

● ‘R’ Open for read, requires the file to already exist in the current media and the

current accessed folder.

● ‘W’ Open for write, will create a new file and give write privilege to it. If the file

already exists, it will be erased first then will open a new one for write.

● ‘A’ Open for append, will create a new file and give write privilege to it. If the file

already exists, it will append data to the end.

Note: USBwiz has 4 available file handles. This is the number of files that can be open

at any time and is not related to the number files USBwiz can access. USBwiz is able

access unlimited number of files.

Format OF<SP>nM>filename<CR>

!00<CR>

Open file foldername with file

handle n and access mode M

M can be R,W or A

n can be 0, 1, 2 or 3

Example OF<SP>1R>VOLTAGE.LOG<CR>

!00<CR>

Open file VOLTAGE.LOG with file

handle 1 with read access mode.

OF<SP>0W>CURRENT.LOG<CR>

!00<CR>

Open file CURRENT.LOG with file

handle 0 with write access mode.

FF - Flush File Data

Flushes the opened file. All buffered data will be written to the storage media. The file

will still be opened and associated with a handle, after performing this operation. This

command is useful to make sure all data are written to the media when needed.

If any data is written to a file, the file must be flushed (or closed – CF command) when

done. Otherwise, the file and/or the file system might get corrupted.

Format FF<SP>n<CR>

!00<CR>

Flush File handle n

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