serial.begin(baudrate) resets the full configuration of serial

[fabianoriccardi]

Hi,
Looking at HardwareSerial.h:

serial.begin(9600);

This calls does not only set the baud rates, but it resets the full configuration to the default values (even rx and tx pins). Is it an intended behavior or is a bug?

I think that if I do not specify further parameters, these shouldn't be changed.

I tested this behavior on latest commit 371f382

[lbernstone]

The function has default parameters. So, if you don't set them, it will use the defaults. If you want to call begin again, you must supply those custom paramteres again. If you just want to change frequency, use updateBaudRate.

[fabianoriccardi]

I have read the header file, I know I can do everything.
The problem is that I'm using a library that calls begin(baudrate), and it also resets the rx and tx pins. This is an unintended side effect since there is no way to change serial pins if not in the class constructor in other Arduino cores.

Nothing wrong with this implementation, but in this case, portability among cores seems not trivial.

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