Make private members of HardwareSerial protected
This allows users to create subclasses. Closes: #947
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@ -39,7 +39,7 @@
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class HardwareSerial : public Stream
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{
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private:
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protected:
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volatile uint8_t *_ubrrh;
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volatile uint8_t *_ubrrl;
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volatile uint8_t *_ucsra;
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