USB Keyboard

**Ioannis** · - 18th December 2021, 21:04

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

Code:

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

Code:

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...