Update HardwareSerial.cpp

LDP-Soft · web-flow · commit d8a904ff0cda · 2022-11-08T00:38:54.000-06:00
diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp
@@ -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

Original file line number	Diff line number	Diff line change
`@@ -177,6 +177,11 @@ int HardwareSerial::peek(void)`
`177`	`177`	`}`
`178`	`178`	`}`
`179`	`179`
	`180`	`+int HardwareSerial::peekLast(void)`
	`181`	`+{`
	`182`	`+ return _rx_buffer_head==_rx_buffer_tail ? -1 : _rx_buffer[(SERIAL_RX_BUFFER_SIZE+_rx_buffer_tail-1)%SERIAL_RX_BUFFER_SIZE];`
	`183`	`+}`
	`184`	`+`
`180`	`185`	`int HardwareSerial::read(void)`
`181`	`186`	`{`
`182`	`187`	`// if the head isn't ahead of the tail, we don't have any characters`