#define LOG_PREFIX "ut372"
-uint8_t lookup[] = {
+static const uint8_t lookup[] = {
0x7B,
0x60,
0x5E,
0x3F,
0x70,
0x7F,
- 0x7D
+ 0x7D,
};
#define DECIMAL_POINT_MASK 0x80
#define FLAGS1_HOLD_MASK (1 << 2)
#define FLAGS2_RPM_MASK (1 << 0)
+#define FLAGS2_COUNT_MASK (1 << 1)
#define FLAGS2_MAX_MASK (1 << 4)
#define FLAGS2_MIN_MASK (1 << 5)
-#define FLAGS2_AVE_MASK (1 << 6)
+#define FLAGS2_AVG_MASK (1 << 6)
/* Decode a pair of characters into a byte. */
static uint8_t decode_pair(const uint8_t *buf)
SR_PRIV gboolean sr_ut372_packet_valid(const uint8_t *buf)
{
- return (buf[25] == '\r' && buf[26] == '\n');
+ uint8_t flags2;
+
+ if (!(buf[25] == '\r' && buf[26] == '\n'))
+ return FALSE;
+
+ flags2 = decode_pair(buf + 23);
+
+ if (!(flags2 & (FLAGS2_RPM_MASK | FLAGS2_COUNT_MASK)))
+ /* Device is in the setup menu - no valid data shown. */
+ return FALSE;
+
+ return TRUE;
}
SR_PRIV int sr_ut372_parse(const uint8_t *buf, float *floatval,
flags1 = decode_pair(buf + 21);
flags2 = decode_pair(buf + 23);
- /* If not in RPM mode, ignore packet. */
- if (!(flags2 & FLAGS2_RPM_MASK)) {
- sr_dbg("Not in RPM mode. Count mode is unsupported.");
- return SR_ERR_NA;
+ if (flags2 & FLAGS2_RPM_MASK) {
+ analog->mq = SR_MQ_FREQUENCY;
+ analog->unit = SR_UNIT_REVOLUTIONS_PER_MINUTE;
+ } else if (flags2 & FLAGS2_COUNT_MASK) {
+ analog->mq = SR_MQ_COUNT;
+ analog->unit = SR_UNIT_UNITLESS;
}
if (flags1 & FLAGS1_HOLD_MASK)
analog->mqflags |= SR_MQFLAG_MIN;
if (flags2 & FLAGS2_MAX_MASK)
analog->mqflags |= SR_MQFLAG_MAX;
- if (flags2 & FLAGS2_AVE_MASK)
+ if (flags2 & FLAGS2_AVG_MASK)
analog->mqflags |= SR_MQFLAG_AVG;
value = 0;
*floatval = (float) value / divisor;
- analog->mq = SR_MQ_FREQUENCY;
- analog->unit = SR_UNIT_REVOLUTIONS_PER_MINUTE;
-
return SR_OK;
}