X-Git-Url: https://sigrok.org/gitweb/?p=libsigrok.git;a=blobdiff_plain;f=src%2Fdmm%2Fmetex14.c;h=d93052a85b84bc7cbfbe50b5b3c266df50dbf665;hp=b610aba9fab962f43b09312414df38acf44680ce;hb=d7838e48046aa9c46966df2e3ee3bfba3d43a2e3;hpb=cd97e39d8917ac7612712ee51ae24ffc89706239

diff --git a/src/dmm/metex14.c b/src/dmm/metex14.c
index b610aba9..d93052a8 100644
--- a/src/dmm/metex14.c
+++ b/src/dmm/metex14.c
@@ -22,7 +22,6 @@
  *
  * Metex 14-bytes ASCII protocol parser.
  *
- * @internal
  * This should work for various multimeters which use this kind of protocol,
  * even though there is some variation in which modes each DMM supports.
  *
@@ -329,14 +328,23 @@ static gboolean flags_valid(const struct metex14_info *info)
 	return TRUE;
 }
 
-#ifdef HAVE_LIBSERIALPORT
+#ifdef HAVE_SERIAL_COMM
 SR_PRIV int sr_metex14_packet_request(struct sr_serial_dev_inst *serial)
 {
 	const uint8_t wbuf = 'D';
+	size_t wrlen;
+	int ret;
 
 	sr_spew("Requesting DMM packet.");
 
-	return serial_write_blocking(serial, &wbuf, 1, 0);
+	wrlen = sizeof(wbuf);
+	ret = serial_write_blocking(serial, &wbuf, wrlen, 0);
+	if (ret < 0)
+		return ret;
+	if ((size_t)ret != wrlen)
+		return SR_ERR_IO;
+
+	return SR_OK;
 }
 #endif