gnupic: Re: [gnupic] USB code, PICDEM FS USB and Linux
Subject:
Re: [gnupic] USB code, PICDEM FS USB and Linux
From:
Ben Dugan ####@####.####
Date:
3 Mar 2006 18:17:50 +0000
Message-Id: <4408879D.9020803@curdes.com>
Alessandro,
I have been working more on sending to the picdem, using vendor
requests. Its working well for my purposes. The VendorRequests code you
put in usb-test.asm was very helpful getting me started on this.
I had been getting a timeout error from libusb when I sent vendor
requests to the board, even though the requests were working (that is, I
could get data to the board as I'd hoped.) I was thinking that the host
was waiting for some sort of acknowledgement, so I copied some lines
from elsewhere in the Minch code and it no longer times out. I'm noting
them here in case its of interest to you:
VendorRequests
banksel USB_buffer_data
movf USB_buffer_data+bRequest, W, BANKED
select
case 0x01
banksel demo_buffer
movf USB_buffer_data+wValue, W, BANKED
movwf demo_buffer+0, BANKED
movf USB_buffer_data+wValueHigh, W, BANKED
movwf demo_buffer+1, BANKED
movf USB_buffer_data+wIndex, W, BANKED
movwf demo_buffer+2, BANKED
movf USB_buffer_data+wIndexHigh, W,BANKED
movwf demo_buffer+3, BANKED
* movlw 0x0
* movwf BD0IBC, BANKED
* movlw 0xC8
* movwf BD0IST, BANKED
break
The four *'ed lines seem to eliminate the timeout error.
Ben
