PicoMite USB versions extrem slow response - solutions?

Author	Message
ebbandflow Regular Member Joined: 31/08/2023 Location: United States Posts: 42	Posted: 06:45pm 21 Jun 2025       Daniel, That's really interesting because I thought that when I attempted this before, that I HAD to link to gp13 after trying to use pullups directly and failing to get it working. I had assumed exactly what you are saying, that gp13 was selected to use the level shifter board used, but then decided that gp13 must be toggled - or somehow play into it after not having success, but I'll have to give it another try! And still, you may want to consider the possibility that the user does not want to shift up to 5v signals and provide a way to select the 'high side' voltage level with a jumper?
Amnesie Guru Joined: 30/06/2020 Location: Germany Posts: 746	Posted: 07:05pm 21 Jun 2025         ebbandflow said   Daniel, ...that gp13 was selected to use the level shifter board used, but then decided that gp13 must be toggled - or somehow play into it after not having success Initially I wondered too what role should GP13 play? You only have a CLOCK and a DATA signal, so what's GP13 for? It is only acting as a supply for 3v3. I measured GP13 and it is set on HIGH = 3v3. So I connected my pullups to the 3v3 pin directly and it works fine.   ebbandflow said   And still, you may want to consider the possibility that the user does not want to shift up to 5v signals and provide a way to select the 'high side' voltage level with a jumper? Yes, I am working on it, to allow this. Seems to be a good idea! Greetings Daniel
Amnesie Guru Joined: 30/06/2020 Location: Germany Posts: 746	Posted: 07:10pm 21 Jun 2025         Volhout said   Daniel, The original VGA design 2 has 2 spare pico footprints. In socket 1 the VGA pico, socket 2 tje no-one, socket 3 to jumper the PS2 signals between 1 and 2. For almost no money you JLC the gerbers for 5 boards. G738 housing. For VGA design 1 silicon chip magazine already published a usb 2 ps2 piggy back board. Volhout That's a nice idea, totally forgot VGA design 2! But I am designing my own PCBs anyways, but this is a great idea for a new design (taking design 2 as a "template"!) good that you mentioned this, maybe others on the forum want to try this, too. Greetings Daniel
stanleyella Guru Joined: 25/06/2022 Location: United Kingdom Posts: 2782	Posted: 09:18pm 21 Jun 2025       I only used usb tiny keyboards. some work wireless dongle... but use mmedit for programming. usb kb and usb ? ps2 and no usb uart  but no idea about ps2 mouse but never used usb mouse. my ps2 is full size. way to large but 3.3V I think as I'm wiring work out what I really need. do ps2 mice exist anymore?