diff options
| author | Aleksander Morgado <aleksander@aleksander.es> | 2017-03-25 18:18:46 +0100 |
|---|---|---|
| committer | Aleksander Morgado <aleksander@aleksander.es> | 2017-04-18 18:08:57 +0200 |
| commit | 580c113c5a4c9c8b74edce3808f0c6f0b43e2025 (patch) | |
| tree | 11d5bad84c895fd49997944045dd4ac94c8111b1 /src/mm-port-serial.c | |
| parent | 3223b56ba9f61c4339d74829748ae6937cffc196 (diff) | |
port-serial: new method to explicitly set flow control settings
Diffstat (limited to 'src/mm-port-serial.c')
| -rw-r--r-- | src/mm-port-serial.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/mm-port-serial.c b/src/mm-port-serial.c index f2b97a02..e55f9062 100644 --- a/src/mm-port-serial.c +++ b/src/mm-port-serial.c @@ -1778,6 +1778,56 @@ mm_port_serial_flash (MMPortSerial *self, /*****************************************************************************/ +gboolean +mm_port_serial_set_flow_control (MMPortSerial *self, + MMFlowControl flow_control, + GError **error) +{ + struct termios options; + gboolean had_xon_xoff; + gboolean had_rts_cts; + + /* retrieve current settings */ + memset (&options, 0, sizeof (struct termios)); + if (tcgetattr (self->priv->fd, &options) != 0) { + g_set_error (error, MM_CORE_ERROR, MM_CORE_ERROR_FAILED, + "couldn't get serial port attributes: %s", g_strerror (errno)); + return FALSE; + } + + /* clear all flow control flags */ + + had_xon_xoff = !!(options.c_iflag & (IXON | IXOFF)); + options.c_iflag &= ~(IXON | IXOFF | IXANY); + + had_rts_cts = !!(options.c_cflag & (CRTSCTS)); + options.c_cflag &= ~(CRTSCTS); + + /* setup the requested flags */ + switch (flow_control) { + case MM_FLOW_CONTROL_XON_XOFF: + mm_dbg ("(%s): enabling XON/XOFF flow control", mm_port_get_device (MM_PORT (self))); + options.c_iflag |= (IXON | IXOFF | IXANY); + break; + case MM_FLOW_CONTROL_RTS_CTS: + mm_dbg ("(%s): enabling RTS/CTS flow control", mm_port_get_device (MM_PORT (self))); + options.c_cflag |= (CRTSCTS); + break; + case MM_FLOW_CONTROL_NONE: + if (had_xon_xoff) + mm_dbg ("(%s): disabling XON/XOFF flow control", mm_port_get_device (MM_PORT (self))); + if (had_rts_cts) + mm_dbg ("(%s): disabling RTS/CTS flow control", mm_port_get_device (MM_PORT (self))); + break; + default: + g_assert_not_reached (); + } + + return internal_tcsetattr (self, self->priv->fd, &options, error); +} + +/*****************************************************************************/ + MMPortSerial * mm_port_serial_new (const char *name, MMPortType ptype) { |