B&B Electronics Parallel Printer Card PIOC Uživatelský manuál stáhnout pdf (Strana 55)

GHI Electronics,LLC USBwiz User Manual

USBwiz Command Set

00 Setup

01 Output

02 Input

07 is fixed

Example FE<SP>03<SP>02<CR>

!00<CR>

$07<CR>

07<SP>05<SP>81<SP>03<SP>

04<SP>00<SP>0A<CR>

!00<CR>

Find an endpoint in the previous interface

with interrupt transfer and input direction.

FD - Find Descriptor (Raw Command)

Searches for a descriptor in the loaded configuration descriptor(LD command) in the

internal buffer with a specific criteria. Since several descriptors might match a given

criteria, the search parameter “Index” specifies how many matching descriptors shall be

skipped.

The found interface descriptor is displayed in ASCII format and the bytes are separated

by space characters.

Format FD<SP>tt<SP>ii<CR>

!00<CR>

$ss<CR>

ss bytes in ASCII<CR>

!00<CR>

tt Descriptor Type

ii Zero-based index.

ss Data size in hexadecimal.

Example FD<SP>21<SP>00<CR>

!00<CR>

$09<CR>

09<SP>21<SP>10<SP>01<SP>00<SP>

01<SP>22<SP>34<SP>00<CR>

!00<CR>

Find the first descriptor(index = 0)

with (type = 0x21)

SS - Send Setup Request (Raw Command)

This command sends a USB setup transfer. Note that if an error occurred during any of

the communication stages (Setup, Data, Status), USBwiz will return “!” with error code

immediately without finishing all data transfer.

Format SS<SP>h>tt<SP>rr<SP>vvvv<SP>iiii<SP>lll<CR>

!00<CR>

h USB device handle 0, 1,

tt: bm RequestType

rr: bRequest

vvvv: wValue

iiii: wIndex

llll: wLength

No Data stage.

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