Stop Hiding My Controls: Hidden Interface Controls Are Affecting Usability

Re:Stop Hiding My Controls: Hidden Interface Controls Are Af... by seanmcdirmid on Saturday July 05, 2025 @10:33PM (#44477355)

They can be used, they just need more complexity than a simple switch that completes a circuit, they now have tiny cpus so they can signal the bus correctly. The switch must broadcast turn thing on when the switch is set to on, and then turn thing off when the switch is set to off, all with whatever serial protocol being used (including back off and retry, etc. ..). So your input devices need to be little computers so that you can use one bus for everything, now you can see where one touch screen begins to save money.

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Re:Stop Hiding My Controls: Hidden Interface Controls Are Af... by PoshBreeze on Sunday July 06, 2025 @01:13AM (#44478023)

I don't believe what you are describing is necessary. I am pretty sure you could have a module where the switches are wired normally into something and that communicates with the main bus. I am pretty sure this is how a lot of cars already work from watching people work on more modern vehicles.

In any event. I've never heard a good explanation of why I need all of this to turn the lights on or off in a car, when much simpler systems worked perfectly fine.

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Re:Stop Hiding My Controls: Hidden Interface Controls Are Af... by sokoloff on Sunday July 06, 2025 @08:43AM (#44480311)

Many of the low-speed switches are connected to a single controller that then interfaces over LIN or CAN to the car.

Reducing the copper content of cars and reducing the size of the wiring bundles that have to pass through grommets to doors, in body channels, etc. was the main driver. Offering greater interconnectedness and (eventually) reliability was a nice side effect.

It used to be a pain in the ass to get the parking lights to flash some kind of feedback for remote locking, remote start, etc. Now, it’s two signals on the CAN bus.

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Re:Stop Hiding My Controls: Hidden Interface Controls Are Af... by PoshBreeze on Sunday July 06, 2025 @09:00AM (#44480450)

OK, thanks for the explanation.

> Offering greater interconnected news and (eventually) reliability was a nice side effect.

I am not sure about that. You still suffer from electronic problems due to corrosion around the plugs, duff sockets and dodgy earths as the vehicle ages.

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Re:Stop Hiding My Controls: Hidden Interface Controls Are Af... by sheiyei on Sunday July 06, 2025 @03:01AM (#44478469)

Ah, the classic "a keyboard has a CPU for each key" argument

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Re:Stop Hiding My Controls: Hidden Interface Controls Are Af... by LtWorf on Sunday July 06, 2025 @10:51AM (#44481253)

You can have hundreds of switches closing circuits all connected to a device that is connected to the can bus.

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Re:Stop Hiding My Controls: Hidden Interface Controls Are Af... by IIsi50MHz on Friday July 11, 2025 @07:27PM (#44537842)

As someone who works in building-automation controls that are based on CANbus, which is a communication network commonly used to connect various parts of cars, I can say that this is not true.

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