USB Keyboard input don't work!!! Please Help

[PJALM]

You haven't even posted your code so how can we help you?

[faaktoo]

This is code for keyboard emulation(some keys) and kbddecs. It's work fine(sending ).

[skimask]

This is code for keyboard emulation(some keys) and kbddecs. It's work fine(sending ).

Where's the part that receive the commands for the LEDs on the keyboard?

[faaktoo]

Dousbin:
USBBufferCount = USBBufferSizeRX ' RX buffer size
USBService ' keep connection alive
USBIn 1, USBBuffer, USBBufferCount, Dousbin ' read data, if available

If USBBuffer[?] = ? then
PORTA = %00000001
else
PORTA = %00000000
endif
return
I'm tried If USBBuffer > 0 then


PS
Are "KBDDESCMOJA" OK?

[faaktoo]

Dousbin:
USBBufferCount = USBBufferSizeRX ' RX buffer size
USBService ' keep connection alive
USBIn 1, USBBuffer, USBBufferCount, Dousbin ' read data, if available

If USBBuffer[?] = ? then
PORTA = %00000010
else
PORTA = %00000000
endif
return

I'm tried
If USBBuffer > 0 then 'If recieve anything
PORTA = %00000010
endif
but nothing hepend

My friend it programing on VB6 and he give me a small prog for sending commands for LED's(ON-OFF).


PS
Are "KBDDESCMOJA" OK?

[falingtrea]

If you looked in the other thread you would see the answer. You need to read the USB HID Class Device Description document from usb.org. In this document it tells you the exact format of the packet that the computer sends that has the status of the CAP Lock and other signals. You need to process this OUT packet.

[faaktoo]

How many bytes USB keyboard receives? When? Where is LED's data stored?

[Squibcakes]

Ok Faaktoo


Firstly the caps, numlock status are sent as bits in byte zero sent from the pc. These are are always sent from the pc on every DoUSBin service.

' BYTE 0 - LEDS STATUS (USBIN, OUTPUT REPORT)
        'BIT 0 = NUM LOCK
        'BIT 1 = CAPS LOCK
        'BIT 2 = SCROLL LOCK
        'BIT 3 = COMPOSE      
        'BIT 4 = KANA
        
        'BIT <5:7> = NOT USED PADDED DATA

If you want to display the status of the caps, num lock, scroll lock on your pic than you could put some LEDs on a port and assign var to them , example:

    ' the leds
    NUM                 VAR PORTB.0
    CAPS                VAR PORTB.1
    SCRL                VAR PORTB.2

If this bit is 1, the led is on. If it is 0, the led is off.

Than in your main program your can display the satus of the scroll lock etc in a DoUSBin routine.

Example

' ------------------------------------------------------------------------------     
   
DoUSBIn:
'   =======================================
'   Check and receive data from the USB bus                            
'   =======================================

    USBBufferCount = USBBufferSizeRX                ' RX buffer size
    USBService                                      ' keep connection alive
    USBIn 1, USBBufferin, USBBufferCount, SHOWLEDS

SHOWLEDS:
    
    NUM  = USBBufferin.0(0)    ' num lock
    CAPS = USBBufferin.0(1)    ' Caps lock
    SCRL = USBBufferin.0(2)    ' Scoll lock
    
    return

To display the status of the Caps lock, Num lock etc on the keyboard (ie simulate the key press on a button connected to your pic) just send the key number for the caps, num lock etc as part of your DoUSBout Bytes.

For caps lock it is $39
For scroll Lock it is $47
For num lock it is $53.

BTW, You still haven't said please yet.