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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

Hello Sheng,

the hexadecimal 0x55 and 0x57 represent only data bits, not considering start, parity and stop bits.

In the example I was describing I receive a 0x55 (or 0x57) data, followed by the parity bit always '0'.

As the receiver is configured in MARK stick parity I expected to get a parity error.

But as I was saying this happen only if the data is 0x55, in case the data 0x57 I got no parity error.