X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fserial-dmm%2Fprotocol.c;h=fab6c4ae8d25223303400f5c0638ddd84ff54eb5;hb=1a323dd887e655ac76133af1f018e3eeabd174e2;hp=838403de849926c7b02791e435fce39eeb4f88f9;hpb=2b83d7fee11dddba7603e180c3528b14ff8aba0e;p=libsigrok.git

diff --git a/hardware/serial-dmm/protocol.c b/hardware/serial-dmm/protocol.c
index 838403de..fab6c4ae 100644
--- a/hardware/serial-dmm/protocol.c
+++ b/hardware/serial-dmm/protocol.c
@@ -80,7 +80,9 @@ static void handle_new_data(struct sr_dev_inst *sdi, int dmm, void *info)
 	/* Try to get as much data as the buffer can hold. */
 	len = DMM_BUFSIZE - devc->buflen;
 	len = serial_read(serial, devc->buf + devc->buflen, len);
-	if (len < 1) {
+	if (len == 0)
+		return; /* No new bytes, nothing to do. */
+	if (len < 0) {
 		sr_err("Serial port read error: %d.", len);
 		return;
 	}
@@ -165,6 +167,7 @@ RECEIVE_DATA(PEAKTECH_3410, metex14)
 RECEIVE_DATA(MASTECH_MAS345, metex14)
 RECEIVE_DATA(VA_VA18B, fs9721)
 RECEIVE_DATA(METEX_M3640D, metex14)
+RECEIVE_DATA(METEX_M4650CR, metex14)
 RECEIVE_DATA(PEAKTECH_4370, metex14)
 RECEIVE_DATA(PCE_PCE_DM32, fs9721)
 RECEIVE_DATA(RADIOSHACK_22_168, metex14)