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Forum Index : Microcontroller and PC projects : Touch Screen for CMM2
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| PhenixRising Guru  Joined: 07/11/2023 Location: United KingdomPosts: 884 |
For some months now, I have been chatting with a Chinese supplier of industrial touch-monitors. I was looking for a TS with serial output. These guys supply these but I couldn't get through to them that I need the protocol. They just couldn't understand this. "We have driver" Yes but for PCs with operating systems...no good for MCUs. Anyway I think it finally clicked and I just received this: This could be good news because I really need a touchscreen for the CMM2. I already interface with the serial output of the ELO-Touch but those are £500 touch monitors...not exactly hobbyist friendly. I'll see about grabbing one for test. |
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| PhenixRising Guru Joined: 07/11/2023 Location: United KingdomPosts: 884 |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6835 |
Should be interesting. The protocol looks pretty sensible, especially as the packet is fixed length. Please let us know how you get on with it. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4271 |
Hi Phenix, One of our customers uses serial port touch screens (19"). But due to availability/cost they few years ago changed over to USB touch screens (still VGA or HDMI, but USB for touch). I am not sure if this is just a CH340 on the same serial protocol. I may be able to find more dataon them if required. But they where absolutely not cheap as I recall, and the touch requirements where severe (operate with gloves). Volhout Edited 2024-11-20 17:51 by Volhout PicomiteVGA PETSCII ROBOTS |
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| PhenixRising Guru Joined: 07/11/2023 Location: United KingdomPosts: 884 |
Always interested, Harm but the relief for me is that; the protocol above is as simple as it gets and similar to what I had in the 80s with the MicroTouch (now 3M) capacitive screens. Their DOS mouse-emulating driver was horrid and so I used the raw protocol. A few years ago, a customer requested that I modify the old DOS code to work with the latest ELO-Touch. Whoa, that was a bit of a challenge because they have a lot more going on. Took me a while to filter-out just what was needed. Manual attached. The Big Book of Smartset.pdf |
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PeteCotton Guru Joined: 13/08/2020 Location: CanadaPosts: 369 |
Definitely interested in finding out how you get on with this. |
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| PhenixRising Guru Joined: 07/11/2023 Location: United KingdomPosts: 884 |
Many moons ago, I acquired a company that had a very cool product that we supplied to lathe manufacturer in Bilbao. Why was it cool? Well it was a 9-axis CNC lathe control and a regular machinist could make ridiculously complex parts without CAD/CAM. He simply selected pre-defined shapes on the touchscreen, linked them together and filled-in the dimensions and voila. Today, we have desktop hobbyists and we have high-end machine shops who design on CAD and send CNC G-codes to the machine to make a part. But there's an awful lot of small shops with big CNCs who don't wanna sit down at a CAD station. They know what the part needs to look like and would prefer to simply describe to the control, what they need and hit the start button. This is what the CMM2 needs to handle on a touchscreen and the PicoMites will receive the motion commands to make things happen. All without the involvement of a BS operating system  |
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