Get Keystroke / Key scancode?

[mozart90]

Hi,

I've bought a USB foot pedal - it is recognized as a HID Interface and seems to send a keystroke - but I do not know which.

(In an editor no chars ar written - and MS Word doesn't recognoze a valdid hotkey combination) but on the other hand some programs ( Total commander) seem to react on the foot pedal.

So how can i figure out the key scan code of this USB foot pedal device - because i like to map it on another key eg "space key" or something like that.

I suggest the keystroke it is "alt + arrow left", but wiht this code it doesn't work :-(

HotKeySet("!{left}", "keysend")
HotKeySet("{esc}", "end")

While 1    
WEnd    

func keysend()
    send("{space}")
EndFunc

func end() 
    exit(0)
EndFunc

Thanks

Mozart90

PS recording a macro and pressing the foot pedal doesn't record anything

Edited September 13, 2008 by mozart90

[martin]

Hi,

I've bought a USB foot pedal - it is recognized as a HID Interface and seems to send a keystroke - but I do not know which.

(In an editor no chars ar written - and MS Word doesn't recognoze a valdid hotkey combination) but on the other hand some programs ( Total commander) seem to react on the foot pedal.

So how can i figure out the key scan code of this USB foot pedal device - because i like to map it on another key eg "space key" or something like that.

I suggest the keystroke it is "alt + arrow left", but wiht this code it doesn't work :-(

HotKeySet("!{left}", "keysend")
HotKeySet("{esc}", "end")

While 1    
WEnd    

func keysend()
    send("{space}")
EndFunc

func end() 
    exit(0)
EndFunc

Thanks

Mozart90

PS recording a macro and pressing the foot pedal doesn't record anything

I don't know much about HID's but if you didn't need to install a special driver then it is likely that the footpedal behaves like a keyboard, as you think, or as a mouse so it could just simulate a mouse button.

This will show which keys it sends if it does send a key or a mouse button.

#include <misc.au3>
While 1
    $keys = ''
    For $n = 1 To 254
        If _IsPressed(Hex($n, 2)) Then
            $keys &= "0x" & Hex($n, 2) & ', '
        EndIf
    Next
    ToolTip($keys, 0, 0)
    If StringInStr($keys, "0x1B") Then
        Sleep(2000)
        Exit
    EndIf
    Sleep(50)
WEnd

Edited September 13, 2008 by martin

[mozart90]

I don't know much about HID's but if you didn't need to install a special driver then it is likely that the footpedal behaves like a keyboard, as you think, or as a mouse so it could just simulate a mouse button.

This will show which keys it sends if it does send a key or a mouse button.

#include <misc.au3>
While 1
    $keys = ''
    For $n = 1 To 254
        If _IsPressed(Hex($n, 2)) Then
            $keys &= "0x" & Hex($n, 2) & ', '
        EndIf
    Next
    ToolTip($keys, 0, 0)
    If StringInStr($keys, "0x1B") Then
        Sleep(2000)
        Exit
    EndIf
    Sleep(50)
WEnd

thanks, the code works!

it's 0x05 :-)

I 'll write a small script which let me start or stop playback/record/ punch in with my footswitch while playing my instrument

I think this will be very comfortable :-)

include <misc.au3>
Opt ("WinTitleMatchMode",1)
HotKeySet("{esc}", "quit")

While 1
    If _IsPressed(Hex(05)) Then ; 
        if ProcessExists( ) then 
                send( {}) 

...
Wend

But could you explain the "for $n=1 to 254" loop while gettig the scan code?

And is there an easier way to exit?

Thanks mozart90

[martin]

thanks, the code works!

it's 0x05 :-)

That was lucky!

But could you explain the "for $n=1 to 254" loop while gettig the scan code?

Have a look at _IsPressed in the help. The loop just checks possible codes from 1 to 255 ie 1 to FF

And is there an easier way to exit?

I made it so that if you press Esc it will exit, but you can make it whatever. You could have a hot key call a function which simply exits. But since the script has served its use theres not much point in developing I would have thought.

Thanks mozart90

That's ok