+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
- *
- * 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 3 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, see <http://www.gnu.org/licenses/>.
- */
-
-#include <glib.h>
-#include <string.h>
-#include <math.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-#include "protocol.h"
-
-/* Reverse the high nibble into the low nibble */
-static uint8_t decode_digit(uint8_t in)
-{
- uint8_t out, i;
-
- out = 0;
- in >>= 4;
- for (i = 0x08; i; i >>= 1) {
- out >>= 1;
- if (in & i)
- out |= 0x08;
- }
-
- return out;
-}
-
-static void decode_buf(struct sr_dev_inst *sdi, unsigned char *data)
-{
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog;
- struct dev_context *devc;
- long factor, ivalue;
- uint8_t digits[4];
- gboolean is_duty, is_continuity, is_diode, is_ac, is_dc, is_auto;
- gboolean is_hold, is_max, is_min, is_relative, minus;
- float fvalue;
-
- devc = sdi->priv;
-
- digits[0] = decode_digit(data[12]);
- digits[1] = decode_digit(data[11]);
- digits[2] = decode_digit(data[10]);
- digits[3] = decode_digit(data[9]);
-
- if (digits[0] == 0x0f && digits[1] == 0x00 && digits[2] == 0x0a &&
- digits[3] == 0x0f)
- /* The "over limit" (OL) display comes through like this */
- ivalue = -1;
- else if (digits[0] > 9 || digits[1] > 9 || digits[2] > 9 || digits[3] > 9)
- /* An invalid digit in any position denotes no value. */
- ivalue = -2;
- else {
- ivalue = digits[0] * 1000;
- ivalue += digits[1] * 100;
- ivalue += digits[2] * 10;
- ivalue += digits[3];
- }
-
- /* Decimal point position */
- factor = 0;
- switch (data[7] >> 4) {
- case 0x00:
- factor = 0;
- break;
- case 0x02:
- factor = 1;
- break;
- case 0x04:
- factor = 2;
- break;
- case 0x08:
- factor = 3;
- break;
- default:
- sr_err("Unknown decimal point byte: 0x%.2x.", data[7]);
- break;
- }
-
- /* Minus flag */
- minus = data[2] & 0x01;
-
- /* Mode detail symbols on the right side of the digits */
- is_duty = is_continuity = is_diode = FALSE;
- switch (data[4]) {
- case 0x00:
- /* None. */
- break;
- case 0x01:
- /* Micro */
- factor += 6;
- break;
- case 0x02:
- /* Milli */
- factor += 3;
- break;
- case 0x04:
- /* Kilo */
- ivalue *= 1000;
- break;
- case 0x08:
- /* Mega */
- ivalue *= 1000000;
- break;
- case 0x10:
- /* Continuity shows up as Ohm + this bit */
- is_continuity = TRUE;
- break;
- case 0x20:
- /* Diode tester is Volt + this bit */
- is_diode = TRUE;
- break;
- case 0x40:
- is_duty = TRUE;
- break;
- case 0x80:
- /* Never seen */
- sr_dbg("Unknown mode right detail: 0x%.2x.", data[4]);
- break;
- default:
- sr_dbg("Unknown/invalid mode right detail: 0x%.2x.", data[4]);
- break;
- }
-
- /* Scale flags on the right, continued */
- is_max = is_min = FALSE;
- if (data[5] & 0x04)
- is_max = TRUE;
- if (data[5] & 0x08)
- is_min = TRUE;
- if (data[5] & 0x40)
- /* Nano */
- factor += 9;
-
- /* Mode detail symbols on the left side of the digits */
- is_auto = is_dc = is_ac = is_hold = is_relative = FALSE;
- if (data[6] & 0x04)
- is_auto = TRUE;
- if (data[6] & 0x08)
- is_dc = TRUE;
- if (data[6] & 0x10)
- is_ac = TRUE;
- if (data[6] & 0x20)
- is_relative = TRUE;
- if (data[6] & 0x40)
- is_hold = TRUE;
-
- fvalue = (float)ivalue / pow(10, factor);
- if (minus)
- fvalue = -fvalue;
-
- memset(&analog, 0, sizeof(struct sr_datafeed_analog));
-
- /* Measurement mode */
- analog.mq = -1;
- switch (data[3]) {
- case 0x00:
- if (is_duty) {
- analog.mq = SR_MQ_DUTY_CYCLE;
- analog.unit = SR_UNIT_PERCENTAGE;
- } else
- sr_dbg("Unknown measurement mode: %.2x.", data[3]);
- break;
- case 0x01:
- if (is_diode) {
- analog.mq = SR_MQ_VOLTAGE;
- analog.unit = SR_UNIT_VOLT;
- analog.mqflags |= SR_MQFLAG_DIODE;
- if (ivalue < 0)
- fvalue = NAN;
- } else {
- if (ivalue < 0)
- break;
- analog.mq = SR_MQ_VOLTAGE;
- analog.unit = SR_UNIT_VOLT;
- if (is_ac)
- analog.mqflags |= SR_MQFLAG_AC;
- if (is_dc)
- analog.mqflags |= SR_MQFLAG_DC;
- }
- break;
- case 0x02:
- analog.mq = SR_MQ_CURRENT;
- analog.unit = SR_UNIT_AMPERE;
- if (is_ac)
- analog.mqflags |= SR_MQFLAG_AC;
- if (is_dc)
- analog.mqflags |= SR_MQFLAG_DC;
- break;
- case 0x04:
- if (is_continuity) {
- analog.mq = SR_MQ_CONTINUITY;
- analog.unit = SR_UNIT_BOOLEAN;
- fvalue = ivalue < 0 ? 0.0 : 1.0;
- } else {
- analog.mq = SR_MQ_RESISTANCE;
- analog.unit = SR_UNIT_OHM;
- if (ivalue < 0)
- fvalue = INFINITY;
- }
- break;
- case 0x08:
- /* Never seen */
- sr_dbg("Unknown measurement mode: 0x%.2x.", data[3]);
- break;
- case 0x10:
- analog.mq = SR_MQ_FREQUENCY;
- analog.unit = SR_UNIT_HERTZ;
- break;
- case 0x20:
- analog.mq = SR_MQ_CAPACITANCE;
- analog.unit = SR_UNIT_FARAD;
- break;
- case 0x40:
- analog.mq = SR_MQ_TEMPERATURE;
- analog.unit = SR_UNIT_CELSIUS;
- break;
- case 0x80:
- analog.mq = SR_MQ_TEMPERATURE;
- analog.unit = SR_UNIT_FAHRENHEIT;
- break;
- default:
- sr_dbg("Unknown/invalid measurement mode: 0x%.2x.", data[3]);
- break;
- }
- if (analog.mq == -1)
- return;
-
- if (is_auto)
- analog.mqflags |= SR_MQFLAG_AUTORANGE;
- if (is_hold)
- analog.mqflags |= SR_MQFLAG_HOLD;
- if (is_max)
- analog.mqflags |= SR_MQFLAG_MAX;
- if (is_min)
- analog.mqflags |= SR_MQFLAG_MIN;
- if (is_relative)
- analog.mqflags |= SR_MQFLAG_RELATIVE;
-
- analog.channels = sdi->channels;
- analog.num_samples = 1;
- analog.data = &fvalue;
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog;
- sr_session_send(devc->cb_data, &packet);
-
- devc->num_samples++;
-}
-
-SR_PRIV int victor_dmm_receive_data(struct sr_dev_inst *sdi, unsigned char *buf)
-{
- GString *dbg;
- int i;
- unsigned char data[DMM_DATA_SIZE];
- unsigned char obfuscation[DMM_DATA_SIZE] = "jodenxunickxia";
- unsigned char shuffle[DMM_DATA_SIZE] = {
- 6, 13, 5, 11, 2, 7, 9, 8, 3, 10, 12, 0, 4, 1
- };
-
- for (i = 0; i < DMM_DATA_SIZE && buf[i] == 0; i++);
- if (i == DMM_DATA_SIZE) {
- /* This DMM outputs all zeroes from time to time, just ignore it. */
- sr_dbg("Received all zeroes.");
- return SR_OK;
- }
-
- /* Deobfuscate and reorder data. */
- for (i = 0; i < DMM_DATA_SIZE; i++)
- data[shuffle[i]] = (buf[i] - obfuscation[i]) & 0xff;
-
- if (sr_log_loglevel_get() >= SR_LOG_SPEW) {
- dbg = g_string_sized_new(128);
- g_string_printf(dbg, "Deobfuscated.");
- for (i = 0; i < DMM_DATA_SIZE; i++)
- g_string_append_printf(dbg, " %.2x", data[i]);
- sr_spew("%s", dbg->str);
- g_string_free(dbg, TRUE);
- }
-
- decode_buf(sdi, data);
-
- return SR_OK;
-}
projects / libsigrok.git / blobdiff