B&B Electronics Parallel Printer Card PIOC Uživatelský manuál stáhnout pdf (Strana 44)

GHI Electronics,LLC USBwiz User Manual

USBwiz Command Set

all of them must be sent; if an error occurs while writing, USBwiz still expects all bytes

before producing the final error code.

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

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

Format WF<SP>n>ssssssss<CR>

!00<CR>

User sends data

$aaaaaaaa<CR>

!00<CR>

n File Handle

ssssssss HEX DWORD data size to be

written

aaaaaaaa HEX DWORD actual written

size

Example WF<SP>1>10<CR>

!00<CR>

1234567890abcdef

$00000010<CR>

!00<CR>

Write 16 bytes to the file opened with

handle 1

SH - Shadow Write to multiple Files

This command is similar to WF command except that it writes the same data into two or

three files simultaneously.

Format 1 SH<SP>n<SP>m>ssssssss<CR>

!00<CR>

User sends data

$aaaaaaa1 !00<CR>

$aaaaaaa2 !00<CR>

N First File Handle

m Second File Handle

ssssssss HEX DWORD data

size to be written

aaaaaaaa HEX DWORD actual

written data size to the first and

second handles

Format 2 SH<SP>n<SP>m<SP>o>ssssssss<CR>

!00<CR>

User sends data

$aaaaaaa1 !00<CR>

$aaaaaaa2 !00<CR>

$aaaaaaa3 !00<CR>

Same as the previous Format

except for having a third

shadow o Which is a third file

handle

Example SH<SP>1<SP>0<SP>3>10<CR>

!00<CR>

1234567890abcdef

$00000010 !00<CR>

Write 16 bytes to the files

opened with handles 1, 0, 3

USBwiz accepted the command

16 bytes of data to go into the

file

USBwiz was able to write 16

bytes to the three files

successfully with no errors

occurrence.

RW - Read from File, Write to other file

This command is very powerful and fast! If we have two files, one is opened for Read

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