X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fcommon%2Fdmm%2Fmetex14.c;fp=hardware%2Fcommon%2Fdmm%2Fmetex14.c;h=0000000000000000000000000000000000000000;hb=155b680da482cea2381becb73c51cfb838bff31e;hp=8151aa9ded319006f485bf669a089af8039714e7;hpb=43cd4637285833706f8a404ca027bcf0ee75b9ae;p=libsigrok.git diff --git a/hardware/common/dmm/metex14.c b/hardware/common/dmm/metex14.c deleted file mode 100644 index 8151aa9d..00000000 --- a/hardware/common/dmm/metex14.c +++ /dev/null @@ -1,343 +0,0 @@ -/* - * This file is part of the libsigrok project. - * - * Copyright (C) 2012-2013 Uwe Hermann - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * 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 - */ - -/** - * @file - * - * 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. - * - * It does _not_ work for all Metex DMMs, some use a quite different protocol. - */ - -#include -#include -#include -#include -#include "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) -{ - int i, is_ol, cnt; - char valstr[7 + 1]; - - /* Strip all spaces from bytes 2-8. */ - memset(&valstr, 0, 7 + 1); - for (i = 0, cnt = 0; i < 7; i++) { - if (buf[2 + i] != ' ') - valstr[cnt++] = buf[2 + i]; - } - - /* 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; - if (is_ol != 0) { - sr_spew("Over limit."); - *result = INFINITY; - return SR_OK; - } - - /* Logic functions */ - if (!strcmp((const char *)&valstr, "READY") || - !strcmp((const char *)&valstr, "FLOAT")) { - *result = INFINITY; - info->is_logic = TRUE; - } else if (!strcmp((const char *)&valstr, "Hi")) { - *result = 1.0; - info->is_logic = TRUE; - } else if (!strcmp((const char *)&valstr, "Lo")) { - *result = 0.0; - info->is_logic = TRUE; - } - if (info->is_logic) - return SR_OK; - - /* Bytes 2-8: Sign, value (up to 5 digits) and decimal point */ - sscanf((const char *)&valstr, "%f", result); - - sr_spew("The display value is %f.", *result); - - return SR_OK; -} - -static void parse_flags(const char *buf, struct metex14_info *info) -{ - int i, cnt; - char unit[4 + 1]; - const char *u; - - /* Bytes 0-1: Measurement mode AC, DC */ - info->is_ac = !strncmp(buf, "AC", 2); - info->is_dc = !strncmp(buf, "DC", 2); - - /* Bytes 2-8: See parse_value(). */ - - /* Strip all spaces from bytes 9-12. */ - memset(&unit, 0, 4 + 1); - for (i = 0, cnt = 0; i < 4; i++) { - if (buf[9 + i] != ' ') - unit[cnt++] = buf[9 + i]; - } - - /* Bytes 9-12: Unit */ - u = (const char *)&unit; - if (!strcasecmp(u, "A")) - info->is_ampere = TRUE; - else if (!strcasecmp(u, "mA")) - info->is_milli = info->is_ampere = TRUE; - else if (!strcasecmp(u, "uA")) - info->is_micro = info->is_ampere = TRUE; - else if (!strcasecmp(u, "V")) - info->is_volt = TRUE; - else if (!strcasecmp(u, "mV")) - info->is_milli = info->is_volt = TRUE; - else if (!strcasecmp(u, "Ohm")) - info->is_ohm = TRUE; - else if (!strcasecmp(u, "KOhm")) - info->is_kilo = info->is_ohm = TRUE; - else if (!strcasecmp(u, "MOhm")) - info->is_mega = info->is_ohm = TRUE; - else if (!strcasecmp(u, "pF")) - info->is_pico = info->is_farad = TRUE; - else if (!strcasecmp(u, "nF")) - info->is_nano = info->is_farad = TRUE; - else if (!strcasecmp(u, "uF")) - info->is_micro = info->is_farad = TRUE; - else if (!strcasecmp(u, "KHz")) - info->is_kilo = info->is_hertz = TRUE; - else if (!strcasecmp(u, "C")) - info->is_celsius = TRUE; - else if (!strcasecmp(u, "DB")) - info->is_decibel = TRUE; - else if (!strcasecmp(u, "")) - info->is_unitless = TRUE; - - /* Bytes 0-1: Measurement mode, except AC/DC */ - info->is_resistance = !strncmp(buf, "OH", 2) || - (!strncmp(buf, " ", 2) && info->is_ohm); - 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) || - (!strncmp(buf, " ", 2) && info->is_volt && info->is_milli); - 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) || - (!strncmp(buf, " ", 2) && !info->is_volt && !info->is_ohm && - !info->is_logic && !info->is_farad && !info->is_hertz); - /* - * Note: - * - Protocol doesn't distinguish "resistance" from "beep" mode. - * - "DB" shows the logarithmic ratio of input voltage to a - * pre-stored (user-changeable) value in the DMM. - */ - - /* Byte 13: Always '\r' (carriage return, 0x0d, 13) */ -} - -static void handle_flags(struct sr_datafeed_analog *analog, float *floatval, - const struct metex14_info *info) -{ - /* Factors */ - if (info->is_pico) - *floatval /= 1000000000000ULL; - if (info->is_nano) - *floatval /= 1000000000; - if (info->is_micro) - *floatval /= 1000000; - if (info->is_milli) - *floatval /= 1000; - if (info->is_kilo) - *floatval *= 1000; - if (info->is_mega) - *floatval *= 1000000; - - /* Measurement modes */ - if (info->is_volt) { - analog->mq = SR_MQ_VOLTAGE; - analog->unit = SR_UNIT_VOLT; - } - if (info->is_ampere) { - analog->mq = SR_MQ_CURRENT; - analog->unit = SR_UNIT_AMPERE; - } - if (info->is_ohm) { - analog->mq = SR_MQ_RESISTANCE; - analog->unit = SR_UNIT_OHM; - } - if (info->is_hertz) { - analog->mq = SR_MQ_FREQUENCY; - analog->unit = SR_UNIT_HERTZ; - } - if (info->is_farad) { - analog->mq = SR_MQ_CAPACITANCE; - analog->unit = SR_UNIT_FARAD; - } - if (info->is_celsius) { - analog->mq = SR_MQ_TEMPERATURE; - analog->unit = SR_UNIT_CELSIUS; - } - if (info->is_diode) { - analog->mq = SR_MQ_VOLTAGE; - analog->unit = SR_UNIT_VOLT; - } - if (info->is_gain) { - analog->mq = SR_MQ_GAIN; - analog->unit = SR_UNIT_DECIBEL_VOLT; - } - if (info->is_hfe) { - analog->mq = SR_MQ_GAIN; - analog->unit = SR_UNIT_UNITLESS; - } - if (info->is_logic) { - analog->mq = SR_MQ_GAIN; - analog->unit = SR_UNIT_UNITLESS; - } - - /* Measurement related flags */ - if (info->is_ac) - analog->mqflags |= SR_MQFLAG_AC; - if (info->is_dc) - analog->mqflags |= SR_MQFLAG_DC; - if (info->is_diode) - analog->mqflags |= SR_MQFLAG_DIODE; -} - -static gboolean flags_valid(const struct metex14_info *info) -{ - int count; - - /* Does the packet have more than one multiplier? */ - count = 0; - count += (info->is_pico) ? 1 : 0; - count += (info->is_nano) ? 1 : 0; - count += (info->is_micro) ? 1 : 0; - count += (info->is_milli) ? 1 : 0; - count += (info->is_kilo) ? 1 : 0; - count += (info->is_mega) ? 1 : 0; - if (count > 1) { - sr_dbg("More than one multiplier detected in packet."); - return FALSE; - } - - /* Does the packet "measure" more than one type of value? */ - count = 0; - count += (info->is_ac) ? 1 : 0; - count += (info->is_dc) ? 1 : 0; - count += (info->is_resistance) ? 1 : 0; - count += (info->is_capacity) ? 1 : 0; - count += (info->is_temperature) ? 1 : 0; - count += (info->is_diode) ? 1 : 0; - count += (info->is_frequency) ? 1 : 0; - if (count > 1) { - sr_dbg("More than one measurement type detected in packet."); - return FALSE; - } - - /* Both AC and DC set? */ - if (info->is_ac && info->is_dc) { - sr_dbg("Both AC and DC flags detected in packet."); - return FALSE; - } - - return TRUE; -} - -#ifdef HAVE_LIBSERIALPORT -SR_PRIV int sr_metex14_packet_request(struct sr_serial_dev_inst *serial) -{ - const uint8_t wbuf = 'D'; - - sr_spew("Requesting DMM packet."); - - return (serial_write(serial, &wbuf, 1) == 1) ? SR_OK : SR_ERR; -} -#endif - -SR_PRIV gboolean sr_metex14_packet_valid(const uint8_t *buf) -{ - struct metex14_info info; - - memset(&info, 0x00, sizeof(struct metex14_info)); - parse_flags((const char *)buf, &info); - - if (!flags_valid(&info)) - return FALSE; - - if (buf[13] != '\r') - return FALSE; - - return TRUE; -} - -/** - * Parse a protocol packet. - * - * @param buf Buffer containing the protocol packet. Must not be NULL. - * @param floatval Pointer to a float variable. That variable will be modified - * in-place depending on the protocol packet. Must not be NULL. - * @param analog Pointer to a struct sr_datafeed_analog. The struct will be - * filled with data according to the protocol packet. - * Must not be NULL. - * @param info Pointer to a struct metex14_info. The struct will be filled - * with data according to the protocol packet. Must not be NULL. - * - * @return SR_OK upon success, SR_ERR upon failure. Upon errors, the - * 'analog' variable contents are undefined and should not be used. - */ -SR_PRIV int sr_metex14_parse(const uint8_t *buf, float *floatval, - struct sr_datafeed_analog *analog, void *info) -{ - int ret; - struct metex14_info *info_local; - - info_local = (struct metex14_info *)info; - - /* Don't print byte 13. That one contains the carriage return. */ - sr_dbg("DMM packet: \"%.13s\"", buf); - - memset(info_local, 0x00, sizeof(struct metex14_info)); - - if ((ret = parse_value(buf, info_local, floatval)) != SR_OK) { - sr_dbg("Error parsing value: %d.", ret); - return ret; - } - - parse_flags((const char *)buf, info_local); - handle_flags(analog, floatval, info_local); - - return SR_OK; -}