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If you try this after the UART is running, it won't work.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Compute whether any sw/hw flow control is in use.
Compute whether hw flow control is in use as a separate value.
These make the code a bit easier to follow.
Signed-off-by: Keith Packard <keithp@keithp.com>
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This allows the system clock to vary at runtime, instead of requiring
a fixed value.
Signed-off-by: Keith Packard <keithp@keithp.com>
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The STM32F0 usart can be operated much like the STM32L usart, but the
registers are all moved around.
Signed-off-by: Keith Packard <keithp@keithp.com>
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