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authorDrew <drew.a.gross@gmail.com>2015-10-27 22:21:53 -0700
committerDrew <drew.a.gross@gmail.com>2015-10-27 22:21:53 -0700
commit5420052258a4af82ea938d85797270f225fc20ad (patch)
tree867d0d6b103eb956fd01c6da9ae0535444f3912b
parent404e5d9bcabe828f9076d9630c77ce742e968023 (diff)
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Return -2 when reading from Serial port times out
This will assist callers to detect timeouts.
-rw-r--r--arduino-serial-lib.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arduino-serial-lib.c b/arduino-serial-lib.c
index d9dbe91..39461ce 100644
--- a/arduino-serial-lib.c
+++ b/arduino-serial-lib.c
@@ -128,6 +128,7 @@ int serialport_read_until(int fd, char* buf, char until, int buf_max, int timeou
if( n==0 ) {
usleep( 1 * 1000 ); // wait 1 msec try again
timeout--;
+ if( timeout==0 ) return -2;
continue;
}
#ifdef SERIALPORTDEBUG