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port-serial: new method to explicitly set flow control settings

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This commit is contained in:
Aleksander Morgado
2017-04-18 18:08:57 +02:00
parent 3223b56ba9
commit 580c113c5a
2 changed files with 55 additions and 0 deletions
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src/mm-port-serial.c
+50
View File
@@ -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)
{
src/mm-port-serial.h
+5
View File
@@ -21,6 +21,7 @@
#include <glib-object.h>
#include <gio/gio.h>
#include "mm-modem-helpers.h"
#include "mm-port.h"
#define MM_TYPE_PORT_SERIAL (mm_port_serial_get_type ())
@@ -150,4 +151,8 @@ GByteArray *mm_port_serial_command_finish (MMPortSerial *self,
GAsyncResult *res,
GError **error);
gboolean mm_port_serial_set_flow_control (MMPortSerial *self,
MMFlowControl flow_control,
GError **error);
#endif /* MM_PORT_SERIAL_H */