Let SoftwareSerial::listen() fail on invalid rx baud rates

In this case, SoftwareSerial::begin will not have enabled the
interrupts, so better not allow the SoftwareSerial instance to enter the
listening state either.

1 files changed, 3 insertions, 0 deletions

diff --git a/libraries/SoftwareSerial/SoftwareSerial.cpp b/libraries/SoftwareSerial/SoftwareSerial.cpp
index 8476deb..605c788 100644
--- a/libraries/SoftwareSerial/SoftwareSerial.cpp
+++ b/libraries/SoftwareSerial/SoftwareSerial.cpp
@@ -178,6 +178,9 @@ inline void SoftwareSerial::tunedDelay(uint16_t delay) {
 // one and returns true if it replaces another 

 bool SoftwareSerial::listen()

 {

+  if (!_rx_delay_stopbit)

+    return false;

+

   if (active_object != this)

   {

     _buffer_overflow = false;