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Adding peekLast() to HW serial library #511

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Adding peekLast() to HW serial library #511

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1e2b0ff
Update HardwareSerial.h
LDP-Soft Nov 8, 2022
d8a904f
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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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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