diff options
| -rw-r--r-- | pcserialport.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/pcserialport.c b/pcserialport.c index 792f079..ef33aa9 100644 --- a/pcserialport.c +++ b/pcserialport.c @@ -78,6 +78,12 @@ smint32 serialPortOpen(const char * port_device_name, smint32 baudrate_bps) smDebug(-1, Low, "Serial port error: failed to set port parameters"); return -1; } + + //flush any stray bytes from device receive buffer that may reside in it + //note: according to following page, delay before this may be necessary http://stackoverflow.com/questions/13013387/clearing-the-serial-ports-buffer + usleep(100000); + tcflush(port_handle,TCIOFLUSH); + return port_handle; } @@ -167,6 +173,9 @@ smint32 serialPortOpen(const char *port_device_name, smint32 baudrate_bps) return(-1); } + //flush any stray bytes from device receive buffer that may reside in it + PurgeComm((HANDLE)port_handle,PURGE_RXABORT|PURGE_RXCLEAR|PURGE_TXABORT|PURGE_TXCLEAR); + return( (smint32)port_handle); } |