serial: Initial code for setting DTR/RTS.

Currently disabled until option parsing is in place.

diff --git a/hardware/common/serial.c b/hardware/common/serial.c
index bdf02163a38ee8ca1145eca15067dafb2263ce33..4920ece24fc89b88e0bb1e19541be0aa700f4c51 100644 (file)
--- a/hardware/common/serial.c
+++ b/hardware/common/serial.c
@@ -32,6 +32,7 @@
 #endif
 #include <stdlib.h>
 #include <errno.h>
+#include <sys/ioctl.h>
 #include <glib.h>
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
@@ -285,7 +286,6 @@ SR_PRIV int serial_read(struct sr_serial_dev_inst *serial, void *buf,
 SR_PRIV int serial_set_params(struct sr_serial_dev_inst *serial, int baudrate,
                int bits, int parity, int stopbits, int flowcontrol)
 {
-
        if (!serial) {
                sr_dbg("Invalid serial port.");
                return SR_ERR;
@@ -341,6 +341,7 @@ SR_PRIV int serial_set_params(struct sr_serial_dev_inst *serial, int baudrate,
 #else
        struct termios term;
        speed_t baud;
+       int ret, controlbits;
 
        if (tcgetattr(serial->fd, &term) < 0) {
                sr_err("tcgetattr() error on port %s (fd %d): %s.",
@@ -504,6 +505,25 @@ SR_PRIV int serial_set_params(struct sr_serial_dev_inst *serial, int baudrate,
                sr_err("tcsetattr() error: %s.", strerror(errno));
                return SR_ERR;
        }
+
+#if 0
+       /* TODO: Make configurable via driver options. */
+
+       sr_spew("Configuring RTS to 1/high.");
+       controlbits = TIOCM_RTS;
+       if ((ret = ioctl(serial->fd, TIOCMBIC, &controlbits)) < 0) {
+               sr_err("Error setting RTS to 1: %s.", strerror(errno));
+               return SR_ERR;
+       }
+
+       sr_spew("Configuring DTR to 0/low.");
+       controlbits = TIOCM_DTR;
+       if ((ret = ioctl(serial->fd, TIOCMBIS, &controlbits)) < 0) {
+               sr_err("Error setting DTR to 0: %s.", strerror(errno));
+               return SR_ERR;
+       }
+#endif
+
 #endif
 
        return SR_OK;