HardwareSerial BUG Rx pin floating input, arduino#48

mattairtech · mattairtech · commit 7b881bbd5a17 · 2015-11-16T04:38:28.000Z
diff --git a/cores/arduino/Uart.cpp b/cores/arduino/Uart.cpp
@@ -36,6 +36,7 @@ void Uart::begin(unsigned long baudrate)
 
 void Uart::begin(unsigned long baudrate, uint8_t config)
 {
+  pinMode(uc_pinRX,INPUT_PULLUP);//Rx pin set INPUT_PULLUP mode
   pinPeripheral(uc_pinRX, PIO_SERCOM);
   pinPeripheral(uc_pinTX, PIO_SERCOM);
 

Original file line number	Diff line number	Diff line change
`@@ -36,6 +36,7 @@ void Uart::begin(unsigned long baudrate)`
`36`	`36`
`37`	`37`	`void Uart::begin(unsigned long baudrate, uint8_t config)`
`38`	`38`	`{`
	`39`	`+ pinMode(uc_pinRX,INPUT_PULLUP);//Rx pin set INPUT_PULLUP mode`
`39`	`40`	`pinPeripheral(uc_pinRX, PIO_SERCOM);`
`40`	`41`	`pinPeripheral(uc_pinTX, PIO_SERCOM);`
`41`	`42`