Avoid losing input bytes in the UART on STM32F4xx. #8
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The compiler expands an assignment to part of the DR register to a read-modify-write sequence. However, reading DR has the side-effect of clearing the SR.RXNE bit, so sending a byte could result in the loss of input bytes.
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The compiler expands an assignment to part of the DR register to a read-modify-write sequence. However, reading DR has the side-effect of clearing the SR.RXNE bit, so sending a byte could result in the loss of input bytes.