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GHI Electronics,LLC USBwiz User Manual

1. USBwiz Functions

Keyboard

Most keyboards return 8 bytes in the HID report which are decoded as follows:

First byte is the modifier byte: (When the bit is set, the associated button is pressed)

Modifier Key Bit Order

Left CTRL 0

Left SHIFT 1

Left ALT 2

Left GUI 3

Right CTRL 4

Right SHIFT 5

Right ALT 6

Right GUI 7

Key array bytes follows with each byte represent a pressed key. Thus, several pressed

keys can be reported at the same time. When many keys are pressed and the keyboard

cannot handle them, it will return an error in the HID report. Here are the codes for the

keys in this array:

Usage

(Hex)

Usage Name Remarks

00 Reserved (no event indicated) Status indicator, Not a physical Button

Keyboard ErrorRollOver Status indicator, Not a physical Button

Keyboard POSTFail Status indicator, Not a physical Button

Keyboard ErrorUndefined Status indicator, Not a physical Button

Keyboard a and A remapped for other languages

05 Keyboard b and B

Keyboard c and C remapped for other languages

07 Keyboard d and D

08 Keyboard e and E

09 Keyboard f and F

0A Keyboard g and G

0B Keyboard h and H

0C Keyboard i and I

0D Keyboard j and J

0E Keyboard k and K

0F Keyboard l and L

Keyboard m and M remapped for other languages

11 Keyboard n and N

Keyboard o and O remapped for other languages

Keyboard p and P remapped for other languages

14 Keyboard q and Q

remapped for other languages

15 Keyboard r and R

Keyboard s and S remapped for other languages

17 Keyboard t and T

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