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

**Squibcakes** · - 13th June 2008, 01:31

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.

Code:

' 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:

Code:

    ' 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

Code:

' ------------------------------------------------------------------------------     
   
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.