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transporting ps/2 kb & mouse and a Wacom tablet via serial: feasible?
DiTBho:
The Wacom tablet uses a serial line in NULL modem configuration, transporting data @ 9600bps.
I am thinking about using a serial line @ 1MBps to transport ps/2 kb & mouse and the Wacom tablet.
--- Code: ---. ______________ ______________
. | | | |
ps/2 keyboard ---->| FIFO | | FIFO |----> ps/2 keyboard
| \ | | / |
ps/2 mouse ---->| FIFO - merge |========== fast uart ==========| split - FIFO |----> ps/2 mouse
| / | | \ |
Wacom tablet ---->| FIFO | | FIFO |----> Wacom tablet
| | | |
|______________| |______________|
--- End code ---
SiliconWizard:
Sure, why not?
Something as cheap as the RP2040 should be fine for this. Heck, with it, you could even add a USB port.
Ian.M:
Transport how far?
If its only a few meters and the host has full USB support, it may well be simpler/easier to use USB, with a USB serial adapter, and a USB to PS/2 interface on a hub at the input device end.
DiTBho:
--- Quote from: Ian.M on June 27, 2022, 06:32:25 pm ---Transport how far?
--- End quote ---
Yup, I forgot to mention: 3 meters :D
--- Quote from: Ian.M on June 27, 2022, 06:32:25 pm ---If its only a few meters and the host has full USB support, it may well be simpler/easier to use USB, with a USB serial adapter, and a USB to PS/2 interface on a hub at the input device end.
--- End quote ---
Unfortunately there is no USB support and I cannot add it.
DiTBho:
OK, so tomorrow I will think about the transport-protocol (something very simple), and then I will try to implement it.
I have already ordered two RP2040 units like suggested by SiliconWizard :D
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