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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,


You say that the LSR register bit 2 (PE) sometimes is "0" and sometimes is “1”. So when Parity Error (PE) bit is "0", does the Break Interrupt (BI) bit being triggered? If the Break Interrupt (BI) bit is not triggered, then the Parity Error (PE) bit is "0" that's expected.