CODEWITHSUNDEEP
clinuxserial-port
romaric crailox
romaric crailox

Reputation: 584

high speed character detection rs232

I have to do a code in C to detect the inter-characters time within a rs232 line on linux. Inter-characters time to detect could be 1ms. So I need something to timestamp very quickly an incomming characters. When I say very quickly is less than 1ms.

I don't ask for a coding solution, I just want a initial help to know what path I have to take : is it possible to do this on linux ? I have to modify a driver to reach this kind of time ? Or Something on user space can do it (I don't think so).

Upvotes: 0

Views: 102

Answers (1)

vasek
vasek

Reputation: 2849

No chance to achieve this in user space, as far as I know there is no serial port configuration that allows you to specify precise inter-character timeout. Maybe coding custom driver could bring you closer to UART interrupts since that's what you need.

However every time I had to solve similar task, I ended up creating a tiny hardware module that performs my time-critical task very precisely and only reports results to the linux machine. It totally depends on what you need and how precise your communication gaps detection should be.

Upvotes: 3

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