From b6ba4b6aab4f5886866bd125a2e09940892dcac6 Mon Sep 17 00:00:00 2001 From: Matthijs Kooijman Date: Wed, 23 Apr 2014 17:45:10 +0200 Subject: In SoftwareSerial::recv, only calculate the new tail once This shortens the generated code a bit more. --- libraries/SoftwareSerial/SoftwareSerial.cpp | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'libraries/SoftwareSerial/SoftwareSerial.cpp') 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 { -- cgit v1.2.3-18-g5258