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Patrik78's avatar
Patrik78
Icon for New Contributor rankNew Contributor
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...
ShengN_altera's avatar
ShengN_altera
Icon for Super Contributor rankSuper Contributor
3 years ago

Hi @Patrik78 ,

Seems like there's no problem with the data package and LCR. Then it's better to issue a Break Interrupt (bi) between the received data packages by holding serial input, sin, in a logic '0' state for longer than the sum of start time + data bits + parity + stop bits and after that logic '1'. Because as mentioned in document that the Parity Error (PE) bit (LSR[2]) will be set if a break interrupt has occurred, as indicated by Break Interrupt (BI) bit (LSR[4]).

Let me know if you have any further update.

Thanks,

Best regards,

Sheng

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