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Commit 5590c8ff authored by Eduardo José Tagle's avatar Eduardo José Tagle Committed by Scott Lahteine
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Fix MarlinSerial (AVR) (#10991) 

An undocumented hw bug makes the UART lose chars when RX ISR is disabled, even for a very small amount of time. This happens when RX_BUFFER > 256, and the result is corrupted received commands. Solved by implementing pseudo-atomic operations on 16bit indices.
parent 3fd1f32b
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