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Patrik78's avatar
Patrik78
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3 years ago

UART 16550 IP - Stick parity problem

Hello, in my company we're facing a problem while using UART 16550 IP in stick parity mode: on LSR register we set SP=1, EPS=1, PEN=1 in order to use MARK_PARITY. While in transmission everything...
Patrik78's avatar
Patrik78
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3 years ago

Deart Sheng,

the problem is that it seems the parity is not checked as cleared, but it seems to check the number the number of logic '1's received.

We see no difference while receiving, in setting the LCR with SP=1 or not: with EPS=1, it seems to check an even number of logics '1's.

Are we misunderstanding something?