B&B Electronics Parallel Printer Card PIOC Manuel d'utilisateur télécharger pdf (Page 33)

GHI Electronics,LLC USBwiz User Manual

USBwiz Command Set

7. USBwiz Command Set

All commands below are entered in ASCII. We choose to use ASCII to simplify

troubleshooting and to allow humans to enter commands easily. A special case is when

accessing the data inside or outside a file. When writing/reading to/from a file or USB Pipe,

USBwiz will use any kind of data. Basically, what you send is what goes on the file. It

doesn’t have to be ASCII.

When USBwiz is done processing a command, it will return an error code in the form “!

xx<CR>” where xx is the error number. Also, some commands require returning some

extra information. Returned data will come after the symbol $, unless noted otherwise.

You can send multiple commands to USBwiz until its FIFO is full (indicated by BUSY or

RTS.) USBwiz will take the commands in one at the time, process them and send

responses for each one. Always terminate commands with carriage return character.

Command Description Command Description

BL Update Firmware IT Initialize Real Time Clock

ST Set Real Time Clock GT Get Current Real Time Clock

VR Get Version Number BR Set UART Baud Rate

RT Reset Firmware EE Enable/Disable Echo

RS Read Sector WS Write Sector

FM Mount File System DS Device Switch

II Get USB Device Info UM Register USB Mass Storage

SD Initialize SD card MS Get Media Statistics

QF Quick Format Media IL Initialize List Files and Folders

NF Get Next Directory Entry MD Make Directory

CD Change Directory RD Remove Directory

OF Open a file for read, write or

append

CF Close File Handle

FF Flush File Data RF Read from File

WF Write to File SH Shadow Write to multiple Files

RW Read from File, Write to other

file

SF Split file

PF Seek File FP Get Current File Pointer

Position

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B&B Electronics Parallel Printer Card PIOC Manuel d'utilisateur Page 33