Add support for the MASTECH MS8250D multimeter
This commit is contained in:
Mandl
Uwe Hermann
parent
2bd5d17c70
commit
67070942cc
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@ -157,7 +157,8 @@ libsigrok_la_SOURCES += \
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src/dmm/ut71x.c \
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src/dmm/ut372.c \
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src/dmm/vc870.c \
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src/dmm/dtm0660.c
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src/dmm/dtm0660.c \
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src/dmm/ms8250d.c
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# Hardware (LCR chip parsers)
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if NEED_SERIAL
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@ -0,0 +1,389 @@
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/*
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* This file is part of the libsigrok project.
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*
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* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
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* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
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* Copyright (C) 2018 Stefan Mandl
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* MASTECH MS8250D protocol parser.
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*
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* Sends 18 bytes.
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* 40 02 32 75 53 33 35 5303 10 00 00 00 00 00 00 10 00
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*
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* - Communication parameters: Unidirectional, 2400/8n1
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* - CP2102 USB to UART bridge controller
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*/
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#include <config.h>
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#include <string.h>
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#include <ctype.h>
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#include <math.h>
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#include <glib.h>
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#include <libsigrok/libsigrok.h>
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#include "libsigrok-internal.h"
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#define LOG_PREFIX "ms8250d"
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/*
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* Main display (7-segment LCD value): xxDGA xxEF xxxx xxCB
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* https://en.wikipedia.org/wiki/Seven-segment_display
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*/
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static int parse_digit(uint16_t b)
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{
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switch (b) {
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case 0x0: /* 7-segment not active */
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return 0;
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case 0x430: /* Overflow */
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return 0xF;
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case 0x533:
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return 0;
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case 0x003:
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return 1;
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case 0x721:
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return 2;
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case 0x703:
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return 3;
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case 0x213:
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return 4;
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case 0x712:
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return 5;
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case 0x732:
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return 6;
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case 0x103:
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return 7;
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case 0x733:
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return 8;
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case 0x713:
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return 9;
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default:
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sr_dbg("Invalid digit byte: 0x%02x.", b);
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return -1;
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}
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}
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/* Parse second display. */
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static int parse_digit2(uint16_t b)
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{
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switch (b) {
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case 0x00:
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return 0;
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case 0x7D:
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return 0;
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case 0x05:
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return 1;
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case 0x1B:
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return 2;
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case 0x1F:
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return 3;
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case 0x27:
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return 4;
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case 0x3E:
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return 5;
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case 0x7E:
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return 6;
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case 0x15:
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return 7;
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case 0x7F:
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return 8;
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case 0x3F:
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return 9;
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default:
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sr_dbg("Invalid second display digit byte: 0x%02x.", b);
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return -1;
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}
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}
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static void parse_flags(const uint8_t *buf, struct ms8250d_info *info)
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{
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info->is_volt = (buf[9] & (1 << 4)) ? 1 : 0;
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info->is_ohm = (buf[9] & (1 << 6)) ? 1 : 0;
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info->is_ampere = (buf[10] & (1 << 0)) ? 1 : 0;
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info->is_hz = (buf[10] & (1 << 2)) ? 1 : 0;
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info->is_farad = (buf[10] & (1 << 1)) ? 1 : 0;
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/* Micro */
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if (!info->is_farad)
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info->is_micro = (buf[8] & (1 << 4)) ? 1 : 0;
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else
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info->is_micro = (buf[9] & (1 << 1)) ? 1 : 0; /* uF */
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info->is_nano = (buf[8] & (1 << 5)) ? 1 : 0;
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info->is_milli = (buf[9] & (1 << 0)) ? 1 : 0;
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info->is_kilo = (buf[9] & (1 << 2)) ? 1 : 0;
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info->is_mega = (buf[8] & (1 << 6)) ? 1 : 0;
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info->is_autotimer = (buf[1] & (1 << 0)) ? 1 : 0; /* Auto off timer */
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info->is_rs232 = (buf[1] & (1 << 1)) ? 1 : 0; /* RS232 via USB */
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info->is_ac = (buf[1] & (1 << 4)) ? 1 : 0;
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info->is_dc = (buf[2] & (1 << 1)) ? 1 : 0;
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info->is_auto = (buf[16] & (1 << 4)) ? 1 : 0;
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info->is_bat = (buf[1] & (1 << 5)) ? 1 : 0; /* Low battery */
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info->is_min = (buf[16] & (1 << 2)) ? 1 : 0;
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info->is_max = (buf[16] & (1 << 1)) ? 1 : 0;
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info->is_rel = (buf[15] & (1 << 7)) ? 1 : 0;
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info->is_hold = (buf[16] & (1 << 3)) ? 1 : 0;
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info->is_diode = (buf[11] & (1 << 0)) ? 1 : 0;
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info->is_beep = (buf[11] & (1 << 1)) ? 1 : 0;
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info->is_ncv = (buf[0] & (1 << 0)) ? 1 : 0;
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}
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static gboolean flags_valid(const struct ms8250d_info *info)
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{
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int count;
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/* Does the packet have more than one multiplier? */
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count = 0;
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count += (info->is_nano) ? 1 : 0;
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count += (info->is_micro) ? 1 : 0;
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count += (info->is_milli) ? 1 : 0;
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count += (info->is_kilo) ? 1 : 0;
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count += (info->is_mega) ? 1 : 0;
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if (count > 1) {
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sr_dbg("More than one multiplier detected in packet.");
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return FALSE;
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}
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/* Does the packet "measure" more than one type of value? */
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count = 0;
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count += (info->is_hz) ? 1 : 0;
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count += (info->is_ohm) ? 1 : 0;
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count += (info->is_farad) ? 1 : 0;
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count += (info->is_ampere) ? 1 : 0;
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count += (info->is_volt) ? 1 : 0;
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if (count > 1) {
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sr_dbg("More than one measurement type detected in packet.");
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return FALSE;
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}
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/* Both AC and DC set? */
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if (info->is_ac && info->is_dc) {
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sr_dbg("Both AC and DC flags detected in packet.");
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return FALSE;
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}
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/* RS232 flag set? */
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if (!info->is_rs232) {
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sr_dbg("No RS232 flag detected in packet.");
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return FALSE;
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}
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return TRUE;
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}
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static void handle_flags(struct sr_datafeed_analog *analog, float *floatval,
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int *exponent, const struct ms8250d_info *info)
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{
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/* Factors */
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if (info->is_nano)
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*exponent -= 9;
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if (info->is_micro)
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*exponent -= 6;
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if (info->is_milli)
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*exponent -= 3;
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if (info->is_kilo)
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*exponent += 3;
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if (info->is_mega)
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*exponent += 6;
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*floatval *= powf(10, *exponent);
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/* Measurement modes */
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if (info->is_volt) {
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analog->meaning->mq = SR_MQ_VOLTAGE;
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analog->meaning->unit = SR_UNIT_VOLT;
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}
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if (info->is_ampere) {
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analog->meaning->mq = SR_MQ_CURRENT;
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analog->meaning->unit = SR_UNIT_AMPERE;
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}
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if (info->is_ohm) {
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analog->meaning->mq = SR_MQ_RESISTANCE;
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analog->meaning->unit = SR_UNIT_OHM;
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}
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if (info->is_hz) {
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analog->meaning->mq = SR_MQ_FREQUENCY;
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analog->meaning->unit = SR_UNIT_HERTZ;
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}
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if (info->is_farad) {
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analog->meaning->mq = SR_MQ_CAPACITANCE;
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analog->meaning->unit = SR_UNIT_FARAD;
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}
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if (info->is_beep) {
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analog->meaning->mq = SR_MQ_CONTINUITY;
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analog->meaning->unit = SR_UNIT_BOOLEAN;
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*floatval = (*floatval == INFINITY) ? 0.0 : 1.0;
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}
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if (info->is_diode) {
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analog->meaning->mq = SR_MQ_VOLTAGE;
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analog->meaning->unit = SR_UNIT_VOLT;
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}
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if (info->is_percent) {
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analog->meaning->mq = SR_MQ_DUTY_CYCLE;
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analog->meaning->unit = SR_UNIT_PERCENTAGE;
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}
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/* Measurement related flags */
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if (info->is_ac)
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analog->meaning->mqflags |= SR_MQFLAG_AC;
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if (info->is_dc)
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analog->meaning->mqflags |= SR_MQFLAG_DC;
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if (info->is_auto)
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analog->meaning->mqflags |= SR_MQFLAG_AUTORANGE;
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if (info->is_diode)
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analog->meaning->mqflags |= SR_MQFLAG_DIODE | SR_MQFLAG_DC;
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if (info->is_hold)
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analog->meaning->mqflags |= SR_MQFLAG_HOLD;
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if (info->is_rel)
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analog->meaning->mqflags |= SR_MQFLAG_RELATIVE;
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/* Other flags */
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if (info->is_rs232)
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sr_spew("RS232 enabled.");
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if (info->is_bat)
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sr_spew("Battery is low.");
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if (info->is_beep)
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sr_spew("Beep is active");
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}
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SR_PRIV gboolean sr_ms8250d_packet_valid(const uint8_t *buf)
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{
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struct ms8250d_info info;
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sr_dbg("DMM packet: %02x %02x %02x %02x %02x %02x %02x "
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"%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
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buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6],
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buf[7], buf[8], buf[9], buf[10], buf[11], buf[12], buf[13],
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buf[14], buf[15], buf[16], buf[17]);
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parse_flags(buf, &info);
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if ((buf[17] == 0x00) && flags_valid(&info))
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return TRUE;
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return FALSE;
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}
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/**
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* Parse a protocol packet.
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*
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* @param buf Buffer containing the 18-byte protocol packet. Must not be NULL.
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* @param floatval Pointer to a float variable. That variable will contain the
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* result value upon parsing success. Must not be NULL.
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* @param analog Pointer to a struct sr_datafeed_analog. The struct will be
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* filled with data according to the protocol packet.
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* Must not be NULL.
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* @param info Pointer to a struct ms8250d_info. The struct will be filled
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* with data according to the protocol packet. Must not be NULL.
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*
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* @return SR_OK upon success, SR_ERR upon failure. Upon errors, the
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* 'analog' variable contents are undefined and should not be used.
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*/
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SR_PRIV int sr_ms8250d_parse(const uint8_t *buf, float *floatval,
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struct sr_datafeed_analog *analog, void *info)
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{
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int exponent = 0, sec_exponent = 0, sign;
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float sec_floatval;
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/* buf[0] bar display. */
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/* buf[1] bar display. */
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/* Parse seven segment digit. */
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int16_t digit4 = parse_digit(((buf[7] & 0x73) << 4) | (buf[8] & 0x3));
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int16_t digit3 = parse_digit(((buf[6] & 0x07) << 8) | (buf[5] & 0x30) \
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| ((buf[6] & 0x30) >> 4));
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int16_t digit2 = parse_digit(((buf[4] & 0x73) << 4) | (buf[5] & 0x03));
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int16_t digit1 = parse_digit(((buf[3] & 0x07) << 8) | (buf[2] & 0x30) \
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| ((buf[3] & 0x30) >> 4));
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sr_dbg("Digits: %d %d %d %d.", digit1, digit2, digit3, digit4);
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/* Decimal point position. */
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if ((buf[3] & (1 << 6)) != 0) {
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exponent = -3;
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sr_spew("Decimal point after first digit.");
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} else if ((buf[5] & (1 << 6)) != 0) {
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exponent = -2;
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sr_spew("Decimal point after second digit.");
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} else if ((buf[7] & (1 << 2)) != 0) {
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exponent = -1;
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sr_spew("Decimal point after third digit.");
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} else {
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exponent = 0;
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sr_spew("No decimal point in the number.");
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}
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struct ms8250d_info *info_local;
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info_local = info;
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parse_flags(buf, info_local);
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/* Sign */
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sign = (buf[0] & (1 << 2)) ? -1 : 1;
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/* Parse second display. */
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int16_t sec_digit4 = parse_digit2(buf[12] & 0x7F);
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int16_t sec_digit3 = parse_digit2(buf[13] & 0x7F);
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int16_t sec_digit2 = parse_digit2(buf[14] & 0x7F);
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int16_t sec_digit1 = parse_digit2(buf[15] & 0x7F);
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sr_dbg("Digits (2nd display): %d %d %d %d.",
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sec_digit1, sec_digit2, sec_digit3, sec_digit4);
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/* Second display decimal point position. */
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if ((buf[14] & (1 << 7)) != 0) {
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sec_exponent = -3;
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sr_spew("Sec decimal point after first digit.");
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} else if ((buf[13] & (1 << 7)) != 0) {
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sec_exponent = -2;
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sr_spew("Sec decimal point after second digit.");
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} else if ((buf[12] & (1 << 7)) != 0) {
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sec_exponent = -1;
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sr_spew("Sec decimal point after third digit.");
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} else {
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sec_exponent = 0;
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sr_spew("Sec no decimal point in the number.");
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}
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*floatval = (double)((digit1 * 1000) + (digit2 * 100) + (digit3 * 10) + digit4);
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sec_floatval = (double)(sec_digit1 * 1000) + (sec_digit2 * 100) + (sec_digit3 * 10) + sec_digit4;
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sec_floatval *= powf(10, sec_exponent);
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/* Apply sign. */
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*floatval *= sign;
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handle_flags(analog, floatval, &exponent, info_local);
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/* Check for "OL". */
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if (digit3 == 0x0F) {
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sr_spew("Over limit.");
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*floatval = INFINITY;
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return SR_OK;
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}
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sr_spew("The display value is %f.", (double)*floatval);
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sr_spew("The 2nd display value is %f.", sec_floatval);
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analog->encoding->digits = -exponent;
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analog->spec->spec_digits = -exponent;
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return SR_OK;
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}
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@ -430,6 +430,15 @@ SR_REGISTER_DEV_DRIVER_LIST(serial_dmm_drivers,
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NULL
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),
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/* }}} */
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/* ms8250d based meters {{{ */
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DMM(
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"mastech-ms8250d", ms8250d,
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"MASTECH", "MS8250D", "2400/8n1/rts=0/dtr=1",
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2400, MS8250D_PACKET_SIZE, 0, 0, NULL,
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sr_ms8250d_packet_valid, sr_ms8250d_parse,
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NULL
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),
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/* }}} */
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/* metex14 based meters {{{ */
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DMM(
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"mastech-mas345", metex14,
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@ -1242,6 +1242,21 @@ SR_PRIV void sr_fs9721_10_temp_c(struct sr_datafeed_analog *analog, void *info);
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SR_PRIV void sr_fs9721_01_10_temp_f_c(struct sr_datafeed_analog *analog, void *info);
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SR_PRIV void sr_fs9721_max_c_min(struct sr_datafeed_analog *analog, void *info);
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/*--- hardware/dmm/ms8250d.c ------------------------------------------------*/
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#define MS8250D_PACKET_SIZE 18
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struct ms8250d_info {
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gboolean is_ac, is_dc, is_auto, is_rs232, is_micro, is_nano, is_kilo;
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gboolean is_diode, is_milli, is_percent, is_mega, is_beep, is_farad;
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gboolean is_ohm, is_rel, is_hold, is_ampere, is_volt, is_hz, is_bat;
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gboolean is_ncv, is_min, is_max, is_sign, is_autotimer;
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};
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SR_PRIV gboolean sr_ms8250d_packet_valid(const uint8_t *buf);
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SR_PRIV int sr_ms8250d_parse(const uint8_t *buf, float *floatval,
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struct sr_datafeed_analog *analog, void *info);
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/*--- hardware/dmm/dtm0660.c ------------------------------------------------*/
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#define DTM0660_PACKET_SIZE 15
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Loading…
Reference in New Issue