X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fdmm%2Fmetex14.c;h=0d7234f36748da95e378a977b165aae93087c199;hb=2ea1fdf12113311cbe1a4316e9e2efe4d8ac40f0;hp=81829d583d5e2fb9dc7633410ef24db12edb404c;hpb=34577da641d836dcf27433fee3c6384565ca7847;p=libsigrok.git
diff --git a/src/dmm/metex14.c b/src/dmm/metex14.c
index 81829d58..0d7234f3 100644
--- a/src/dmm/metex14.c
+++ b/src/dmm/metex14.c
@@ -14,8 +14,7 @@
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * along with this program; if not, see .
*/
/**
@@ -30,6 +29,7 @@
* It does _not_ work for all Metex DMMs, some use a quite different protocol.
*/
+#include
#include
#include
#include
@@ -42,9 +42,9 @@
/** Parse value from buf, byte 2-8. */
static int parse_value(const uint8_t *buf, struct metex14_info *info,
- float *result)
+ float *result, int *exponent)
{
- int i, is_ol, cnt;
+ int i, is_ol, cnt, dot_pos;
char valstr[7 + 1];
/* Strip all spaces from bytes 2-8. */
@@ -88,6 +88,12 @@ static int parse_value(const uint8_t *buf, struct metex14_info *info,
/* Bytes 2-8: Sign, value (up to 5 digits) and decimal point */
sscanf((const char *)&valstr, "%f", result);
+ dot_pos = strcspn(valstr, ".");
+ if (dot_pos < cnt)
+ *exponent = -(cnt - dot_pos - 1);
+ else
+ *exponent = 0;
+
sr_spew("The display value is %f.", *result);
return SR_OK;
@@ -146,17 +152,17 @@ static void parse_flags(const char *buf, struct metex14_info *info)
info->is_unitless = TRUE;
/* Bytes 0-1: Measurement mode, except AC/DC */
- info->is_resistance = !strncmp(buf, "OH", 2) ||
+ info->is_resistance = !strncmp(buf, "OH", 2) ||
(!strncmp(buf, " ", 2) && info->is_ohm);
- info->is_capacity = !strncmp(buf, "CA", 2) ||
+ info->is_capacity = !strncmp(buf, "CA", 2) ||
(!strncmp(buf, " ", 2) && info->is_farad);
info->is_temperature = !strncmp(buf, "TE", 2);
- info->is_diode = !strncmp(buf, "DI", 2) ||
+ info->is_diode = !strncmp(buf, "DI", 2) ||
(!strncmp(buf, " ", 2) && info->is_volt && info->is_milli);
- info->is_frequency = !strncmp(buf, "FR", 2) ||
+ info->is_frequency = !strncmp(buf, "FR", 2) ||
(!strncmp(buf, " ", 2) && info->is_hertz);
- info->is_gain = !strncmp(buf, "DB", 2);
- info->is_hfe = !strncmp(buf, "HF", 2) ||
+ info->is_gain = !strncmp(buf, "DB", 2);
+ info->is_hfe = !strncmp(buf, "HF", 2) ||
(!strncmp(buf, " ", 2) && !info->is_volt && !info->is_ohm &&
!info->is_logic && !info->is_farad && !info->is_hertz);
/*
@@ -170,71 +176,74 @@ static void parse_flags(const char *buf, struct metex14_info *info)
}
static void handle_flags(struct sr_datafeed_analog *analog, float *floatval,
- const struct metex14_info *info)
+ int *exponent, const struct metex14_info *info)
{
+ int factor = 0;
/* Factors */
if (info->is_pico)
- *floatval /= 1000000000000ULL;
+ factor -= 12;
if (info->is_nano)
- *floatval /= 1000000000;
+ factor -= 9;
if (info->is_micro)
- *floatval /= 1000000;
+ factor -= 6;
if (info->is_milli)
- *floatval /= 1000;
+ factor -= 3;
if (info->is_kilo)
- *floatval *= 1000;
+ factor += 3;
if (info->is_mega)
- *floatval *= 1000000;
+ factor += 6;
+ *floatval *= powf(10, factor);
+ *exponent += factor;
/* Measurement modes */
if (info->is_volt) {
- analog->mq = SR_MQ_VOLTAGE;
- analog->unit = SR_UNIT_VOLT;
+ analog->meaning->mq = SR_MQ_VOLTAGE;
+ analog->meaning->unit = SR_UNIT_VOLT;
}
if (info->is_ampere) {
- analog->mq = SR_MQ_CURRENT;
- analog->unit = SR_UNIT_AMPERE;
+ analog->meaning->mq = SR_MQ_CURRENT;
+ analog->meaning->unit = SR_UNIT_AMPERE;
}
if (info->is_ohm) {
- analog->mq = SR_MQ_RESISTANCE;
- analog->unit = SR_UNIT_OHM;
+ analog->meaning->mq = SR_MQ_RESISTANCE;
+ analog->meaning->unit = SR_UNIT_OHM;
}
if (info->is_hertz) {
- analog->mq = SR_MQ_FREQUENCY;
- analog->unit = SR_UNIT_HERTZ;
+ analog->meaning->mq = SR_MQ_FREQUENCY;
+ analog->meaning->unit = SR_UNIT_HERTZ;
}
if (info->is_farad) {
- analog->mq = SR_MQ_CAPACITANCE;
- analog->unit = SR_UNIT_FARAD;
+ analog->meaning->mq = SR_MQ_CAPACITANCE;
+ analog->meaning->unit = SR_UNIT_FARAD;
}
if (info->is_celsius) {
- analog->mq = SR_MQ_TEMPERATURE;
- analog->unit = SR_UNIT_CELSIUS;
+ analog->meaning->mq = SR_MQ_TEMPERATURE;
+ analog->meaning->unit = SR_UNIT_CELSIUS;
}
if (info->is_diode) {
- analog->mq = SR_MQ_VOLTAGE;
- analog->unit = SR_UNIT_VOLT;
+ analog->meaning->mq = SR_MQ_VOLTAGE;
+ analog->meaning->unit = SR_UNIT_VOLT;
}
if (info->is_gain) {
- analog->mq = SR_MQ_GAIN;
- analog->unit = SR_UNIT_DECIBEL_VOLT;
+ analog->meaning->mq = SR_MQ_GAIN;
+ analog->meaning->unit = SR_UNIT_DECIBEL_VOLT;
}
if (info->is_hfe) {
- analog->mq = SR_MQ_GAIN;
- analog->unit = SR_UNIT_UNITLESS;
+ analog->meaning->mq = SR_MQ_GAIN;
+ analog->meaning->unit = SR_UNIT_UNITLESS;
}
if (info->is_logic) {
- analog->mq = SR_MQ_GAIN;
- analog->unit = SR_UNIT_UNITLESS;
+ analog->meaning->mq = SR_MQ_GAIN;
+ analog->meaning->unit = SR_UNIT_UNITLESS;
}
/* Measurement related flags */
if (info->is_ac)
- analog->mqflags |= SR_MQFLAG_AC;
+ analog->meaning->mqflags |= SR_MQFLAG_AC;
if (info->is_dc)
- analog->mqflags |= SR_MQFLAG_DC;
+ analog->meaning->mqflags |= SR_MQFLAG_DC;
if (info->is_diode)
- analog->mqflags |= SR_MQFLAG_DIODE;
+ analog->meaning->mqflags |= SR_MQFLAG_DIODE;
}
static gboolean flags_valid(const struct metex14_info *info)
@@ -322,7 +331,7 @@ SR_PRIV gboolean sr_metex14_packet_valid(const uint8_t *buf)
SR_PRIV int sr_metex14_parse(const uint8_t *buf, float *floatval,
struct sr_datafeed_analog *analog, void *info)
{
- int ret;
+ int ret, exponent = 0;
struct metex14_info *info_local;
info_local = (struct metex14_info *)info;
@@ -332,13 +341,16 @@ SR_PRIV int sr_metex14_parse(const uint8_t *buf, float *floatval,
memset(info_local, 0x00, sizeof(struct metex14_info));
- if ((ret = parse_value(buf, info_local, floatval)) != SR_OK) {
+ if ((ret = parse_value(buf, info_local, floatval, &exponent)) != SR_OK) {
sr_dbg("Error parsing value: %d.", ret);
return ret;
}
parse_flags((const char *)buf, info_local);
- handle_flags(analog, floatval, info_local);
+ handle_flags(analog, floatval, &exponent, info_local);
+
+ analog->encoding->digits = -exponent;
+ analog->spec->spec_digits = -exponent;
return SR_OK;
}