diff options
| -rw-r--r-- | libraries/SoftwareSerial/SoftwareSerial.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/libraries/SoftwareSerial/SoftwareSerial.cpp b/libraries/SoftwareSerial/SoftwareSerial.cpp index cafd0c4..42f796b 100644 --- a/libraries/SoftwareSerial/SoftwareSerial.cpp +++ b/libraries/SoftwareSerial/SoftwareSerial.cpp @@ -259,11 +259,12 @@ void SoftwareSerial::recv() d = ~d;
// if buffer full, set the overflow flag and return
- if ((_receive_buffer_tail + 1) % _SS_MAX_RX_BUFF != _receive_buffer_head)
+ uint8_t next = (_receive_buffer_tail + 1) % _SS_MAX_RX_BUFF;
+ if (next != _receive_buffer_head)
{
// save new data in buffer: tail points to where byte goes
_receive_buffer[_receive_buffer_tail] = d; // save new byte
- _receive_buffer_tail = (_receive_buffer_tail + 1) % _SS_MAX_RX_BUFF;
+ _receive_buffer_tail = next;
}
else
{
|