* It does _not_ work for all Metex DMMs, some use a quite different protocol.
*/
+#include <config.h>
#include <string.h>
#include <strings.h>
#include <ctype.h>
#include <math.h>
#include <glib.h>
-#include "libsigrok.h"
+#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
#define LOG_PREFIX "metex14"
/** 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. */
/* Bytes 5-7: Over limit (various forms) */
is_ol = 0;
- is_ol += (!strcasecmp((const char *)&valstr, ".OL")) ? 1 : 0;
- is_ol += (!strcasecmp((const char *)&valstr, "O.L")) ? 1 : 0;
- is_ol += (!strcasecmp((const char *)&valstr, "OL.")) ? 1 : 0;
- is_ol += (!strcasecmp((const char *)&valstr, "OL")) ? 1 : 0;
- is_ol += (!strcasecmp((const char *)&valstr, "-.OL")) ? 1 : 0;
- is_ol += (!strcasecmp((const char *)&valstr, "-O.L")) ? 1 : 0;
- is_ol += (!strcasecmp((const char *)&valstr, "-OL.")) ? 1 : 0;
- is_ol += (!strcasecmp((const char *)&valstr, "-OL")) ? 1 : 0;
+ is_ol += (!g_ascii_strcasecmp((const char *)&valstr, ".OL")) ? 1 : 0;
+ is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "O.L")) ? 1 : 0;
+ is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "OL.")) ? 1 : 0;
+ is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "OL")) ? 1 : 0;
+ is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "-.OL")) ? 1 : 0;
+ is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "-O.L")) ? 1 : 0;
+ is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "-OL.")) ? 1 : 0;
+ is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "-OL")) ? 1 : 0;
if (is_ol != 0) {
sr_spew("Over limit.");
*result = INFINITY;
/* 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;
/* Bytes 9-12: Unit */
u = (const char *)&unit;
- if (!strcasecmp(u, "A"))
+ if (!g_ascii_strcasecmp(u, "A"))
info->is_ampere = TRUE;
- else if (!strcasecmp(u, "mA"))
+ else if (!g_ascii_strcasecmp(u, "mA"))
info->is_milli = info->is_ampere = TRUE;
- else if (!strcasecmp(u, "uA"))
+ else if (!g_ascii_strcasecmp(u, "uA"))
info->is_micro = info->is_ampere = TRUE;
- else if (!strcasecmp(u, "V"))
+ else if (!g_ascii_strcasecmp(u, "V"))
info->is_volt = TRUE;
- else if (!strcasecmp(u, "mV"))
+ else if (!g_ascii_strcasecmp(u, "mV"))
info->is_milli = info->is_volt = TRUE;
- else if (!strcasecmp(u, "Ohm"))
+ else if (!g_ascii_strcasecmp(u, "Ohm"))
info->is_ohm = TRUE;
- else if (!strcasecmp(u, "KOhm"))
+ else if (!g_ascii_strcasecmp(u, "KOhm"))
info->is_kilo = info->is_ohm = TRUE;
- else if (!strcasecmp(u, "MOhm"))
+ else if (!g_ascii_strcasecmp(u, "MOhm"))
info->is_mega = info->is_ohm = TRUE;
- else if (!strcasecmp(u, "pF"))
+ else if (!g_ascii_strcasecmp(u, "pF"))
info->is_pico = info->is_farad = TRUE;
- else if (!strcasecmp(u, "nF"))
+ else if (!g_ascii_strcasecmp(u, "nF"))
info->is_nano = info->is_farad = TRUE;
- else if (!strcasecmp(u, "uF"))
+ else if (!g_ascii_strcasecmp(u, "uF"))
info->is_micro = info->is_farad = TRUE;
- else if (!strcasecmp(u, "KHz"))
+ else if (!g_ascii_strcasecmp(u, "KHz"))
info->is_kilo = info->is_hertz = TRUE;
- else if (!strcasecmp(u, "C"))
+ else if (!g_ascii_strcasecmp(u, "C"))
info->is_celsius = TRUE;
- else if (!strcasecmp(u, "DB"))
+ else if (!g_ascii_strcasecmp(u, "DB"))
info->is_decibel = TRUE;
- else if (!strcasecmp(u, ""))
+ else if (!g_ascii_strcasecmp(u, ""))
info->is_unitless = TRUE;
/* Bytes 0-1: Measurement mode, except AC/DC */
}
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)
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;
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;
}
projects / libsigrok.git / blobdiff