USB Keyboard

[Ioannis]

Thank you very much pedja089!

Looks great and very close to what I need to do. have to add a small graphics display and test it on Win 10. Hope Win 10 do not pose any communication problem.

Really appreciated.
Ioannis

[pedja089]

I used it on win7, and if I remember correctly on XP. It should work on win10.
You have keys.PBP, with all defined keys, also in .doc document you have codes.

Also USBSERVICE should be called every 10mS or so. I wanted to implement it with DT INT, but newer did...
It should be something like this

INCLUDE "DT_INTS-18.bas"
INCLUDE "ReEnterPBP-18.bas"
 
ASM
INT_LIST  macro		; IntSource,       Label,       Type,  ResetFlag?
        INT_Handler   USB_INT,  _SERVICE_USB,       ASM,  yes 
    endm
    INT_CREATE		; Creates the interrupt processor
ENDASM

USBINIT                'INITIALIZE USB
USBSERVICE             'SERVICE USB
UIE = $7F              'ENABLE USB INTERRUPTS
UEIE = $9F             'ENABLE USB ERROR INTERRUPTS
@ INT_ENABLE  USB_INT


SERVICE_USB:
    USBSERVICE
@ INT_RETURN

This code is also from forum, but never tried it.

[Ioannis]

Thanks for this tip also. I had in mind to make this Interrupt driven service but in a later stage.

Ioannis

[Ioannis]

Thanks to your help I am making a progress after a lot of experimenting. Sure I do not understand the whole process but anyway...

I managed to enumerate the PIC and display on an open text file a short string of characters from an 8 byte buffer.

How can this buffer made bigger? I changed these in the main program

USBBufferSizeTX con 16                                                                                    
USBBufferSizeRX con 16
USBBufferCount Var Byte
USBBufferIn var byte[16]
USBBufferOut Var Byte[16]

but still sends only the half buffer.

Then I changed in the hid_desc.bas file this line

retlw	0x10		; This should be the size of the endpoint buffer

from 0x08 to 0x10 but still no joy. I attach the descriptor file.

Any idea?

Ioannis

P.S. I also changed

#define HID_INT_OUT_EP_SIZE 8

in the descriptor file to 16 but still sends 8 byte buffer...

[richard]

never tried it as hid kb but for a hid cdc anyway the data you need to send must be chunked into usb-tx buffer sized lumps
then sent a multiple usb transmissions.

what have you tried ?

[pedja089]

It is not so easy to change buffer. You must change descriptor file, not just length(If I understand usb correctly).

You can send one letter and modifier key at time.

Use this

 For i = 0 To 20	
                lookup i,[KEY_V, KEY_A, KEY_L, KEY_U, KEY_E, KEY_ENTER, 0], USBBufferOut[2]
                call DoUsbOut
                IF USBBufferOut[2]=0 THEN EXIT
            Next i

You can use array

 For i = 0 To 20	
                  USBBufferOut[2]= MyArray[i]
                call DoUsbOut
                IF USBBufferOut[2]=0 THEN EXIT
            Next i

[Jerson]

If you follow the HID descriptor fields, you will notice you need to change the report count for the report which has to carry more data. The endpoint buffer is just a holding place for the in/out data that is handled by the USB interrupt. I am not very conversant with HID at the moment, but can look it up as I have worked on HID keyboards with PSoC