colead-slm: Fix serial port timeout.

diff --git a/src/hardware/colead-slm/protocol.c b/src/hardware/colead-slm/protocol.c
index 64ac12cbf5b241c804ff2870a24126375c1d3035..182c77bb4b4e7a98a20fe5fcee6a56e2226c2a4a 100644 (file)
--- a/src/hardware/colead-slm/protocol.c
+++ b/src/hardware/colead-slm/protocol.c
@@ -184,7 +184,7 @@ SR_PRIV int colead_slm_receive_data(int fd, int revents, void *cb_data)
        const struct sr_dev_inst *sdi;
        struct dev_context *devc;
        struct sr_serial_dev_inst *serial;
-       int len;
+       int delay_ms, len;
        char buf[128];
 
        (void)fd;
@@ -207,7 +207,8 @@ SR_PRIV int colead_slm_receive_data(int fd, int revents, void *cb_data)
                         * we don't want it. */
                        return TRUE;
                /* Got 0x10, "measurement ready". */
-               if (serial_write_blocking(serial, "\x20", 1, 0) < 1)
+               delay_ms = serial_timeout(serial, 1);
+               if (serial_write_blocking(serial, "\x20", 1, delay_ms) < 1)
                        sr_err("unable to send command");
                else {
                        devc->state = COMMAND_SENT;