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Adding peekLast() to HW serial library #511

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LDP-Soft wants to merge 2 commits into arduino:master

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+6 −0

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Adding peekLast() to HW serial library #511

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Update HardwareSerial.h

LDP-Soft Nov 8, 2022

Update HardwareSerial.cpp

LDP-Soft Nov 8, 2022

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5 changes: 5 additions & 0 deletions cores/arduino/HardwareSerial.cpp

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Original file line number	Diff line number	Diff line change
Expand Up		@@ -177,6 +177,11 @@ int HardwareSerial::peek(void)
		}
		}

	int HardwareSerial::peekLast(void)
	{
	return _rx_buffer_head==_rx_buffer_tail ? -1 : _rx_buffer[(SERIAL_RX_BUFFER_SIZE+_rx_buffer_tail-1)%SERIAL_RX_BUFFER_SIZE];
	}

		int HardwareSerial::read(void)
		{
		// if the head isn't ahead of the tail, we don't have any characters
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1 change: 1 addition & 0 deletions cores/arduino/HardwareSerial.h

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Original file line number	Diff line number	Diff line change
Expand Up		@@ -123,6 +123,7 @@ class HardwareSerial : public Stream
		void end();
		virtual int available(void);
		virtual int peek(void);
	virtual int peekLast(void);
		virtual int read(void);
		virtual int availableForWrite(void);
		virtual void flush(void);
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