UART TTL Level Communication Distance

I am facing some embarrassing problems recently.

After some trouble-shooting, I found that:
We have Board-A and Board-B. Board-A and Board-B communicate to each other with a UART TTL Level Communication. The communication cable is around 80cm long. During the communication, I got a lot of UART errors.

My mission is to build a more reliable communication between Board-A and Board-B; but not allowed to modify the hardware design and baud-rate.

To me, it is not wise to use a UART TTL Level Communication between two boards. However, I am being told that, it is very popular to us to use a UART TTL Level Communication between two boards.

I tried to find some articles/documentation to convince the involved people, that, they should not use a UART TTL Level Communication between two boards. But I can not find anything useful. What I could find is something like:
The UART usually does not directly generate or receive the external signals used between different items of equipment.

My question is:
Where can I find some convincing articles/documentation to convince the involved people? (This is to avoid the future problems.)
If I am not allowed to modify the hardware design and baud-rate, what choices do I have to build a more reliable communication?

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  • Not that this has anything at all to do with Keil...

    "I got a lot of UART errors"

    What kind of "UART errors", exactly? There are plenty of things that could cause errors besides the use of TTL signals...

    Possible problems are:
    Noise pickup;
    Cable capacitance;
    Grounding problems.

    You should be able to see them with an oscilloscope. If the signal is "clean" at the receiving end, then you have some other problem...

Reply
  • Not that this has anything at all to do with Keil...

    "I got a lot of UART errors"

    What kind of "UART errors", exactly? There are plenty of things that could cause errors besides the use of TTL signals...

    Possible problems are:
    Noise pickup;
    Cable capacitance;
    Grounding problems.

    You should be able to see them with an oscilloscope. If the signal is "clean" at the receiving end, then you have some other problem...

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