I know at one time the protocol was programed by addressing the firmware of the UART, this is the IC that takes care of the hardware port of RS232, adding parity check should not affect processing time , just that the UART would normally just set an alarm bit on the UART on parity error.
The original standard was EIA which has been pretty much replaced by ISO (ASCII) communication on CNC, the EIA I believe used a parity bit in the 5th bit, but was 8 bits wide.
Al.
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CNC, Mechatronics Integration and Machine Design.
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E. |