Need advice PicoMiteHDMI PS/2 PCB layout

Author	Message
Amnesie Guru Joined: 30/06/2020 Location: Germany Posts: 746	Posted: 03:31pm 02 Jul 2025         matherp said     Quote   BUT NOT the USB variant, since there is a major flaw in the USB keyboard response time I can not live with. Please explain and propose a way I can test for this Hi Peter, no special setup required. I tested it with the latest PicoMiteVGA USB firmware. I only used a micro usb to usb-A adaptor to plug in a USB keyboard (so far tested more than 5 different usb keyboards - all the same). When I type on keyboard there are missing characters (with my - I think normal! - typing speed) there are 1 to 2 missing characters every 4 words, this is too much. Is this different in the HDMI USB version of the firmware? I thought that this is a known limitation and is dicussed many times here. There is no obvious solution to this (via OPTION settings etc.). I can solve it only with the converter (and therefore a second Raspberry Pi Pico, which acting as a USB to PS/2 converter) and then there are no problems anymore. And IF it only occurs on the VGA usb version of the firmware, why is that so? If I remember corretly you (or anyone else) said that this is a limitation by the "tinyUSB" (?) stack or something... Greetings Daniel Edited 2025-07-03 01:37 by Amnesie