272 lines
6.7 KiB
C
272 lines
6.7 KiB
C
/*
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* This file is part of the libsigrok project.
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*
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* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
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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 3 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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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <glib.h>
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#include "libsigrok.h"
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#include "libsigrok-internal.h"
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#define LOG_PREFIX "output/analog"
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struct context {
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int num_enabled_channels;
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GPtrArray *channellist;
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};
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static int init(struct sr_output *o)
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{
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struct context *ctx;
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struct sr_channel *ch;
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GSList *l;
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sr_spew("Initializing output module.");
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if (!o || !o->sdi)
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return SR_ERR_ARG;
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if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
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sr_err("Output module context malloc failed.");
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return SR_ERR_MALLOC;
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}
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o->internal = ctx;
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/* Get the number of channels and their names. */
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ctx->channellist = g_ptr_array_new();
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for (l = o->sdi->channels; l; l = l->next) {
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ch = l->data;
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if (!ch || !ch->enabled)
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continue;
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g_ptr_array_add(ctx->channellist, ch->name);
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ctx->num_enabled_channels++;
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}
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return SR_OK;
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}
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static void si_printf(float value, GString *out, char *unitstr)
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{
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float v;
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if (signbit(value))
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v = -(value);
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else
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v = value;
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if (v < 1e-12 || v > 1e+12)
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g_string_append_printf(out, "%f %s", value, unitstr);
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else if (v > 1e+9)
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g_string_append_printf(out, "%f G%s", value / 1e+9, unitstr);
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else if (v > 1e+6)
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g_string_append_printf(out, "%f M%s", value / 1e+6, unitstr);
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else if (v > 1e+3)
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g_string_append_printf(out, "%f k%s", value / 1e+3, unitstr);
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else if (v < 1e-9)
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g_string_append_printf(out, "%f n%s", value * 1e+9, unitstr);
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else if (v < 1e-6)
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g_string_append_printf(out, "%f u%s", value * 1e+6, unitstr);
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else if (v < 1e-3)
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g_string_append_printf(out, "%f m%s", value * 1e+3, unitstr);
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else
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g_string_append_printf(out, "%f %s", value, unitstr);
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}
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static void fancyprint(int unit, int mqflags, float value, GString *out)
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{
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switch (unit) {
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case SR_UNIT_VOLT:
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si_printf(value, out, "V");
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break;
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case SR_UNIT_AMPERE:
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si_printf(value, out, "A");
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break;
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case SR_UNIT_OHM:
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si_printf(value, out, "");
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g_string_append_unichar(out, 0x2126);
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break;
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case SR_UNIT_FARAD:
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si_printf(value, out, "F");
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break;
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case SR_UNIT_KELVIN:
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si_printf(value, out, "K");
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break;
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case SR_UNIT_CELSIUS:
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si_printf(value, out, "");
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g_string_append_unichar(out, 0x00b0);
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g_string_append_c(out, 'C');
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break;
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case SR_UNIT_FAHRENHEIT:
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si_printf(value, out, "");
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g_string_append_unichar(out, 0x00b0);
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g_string_append_c(out, 'F');
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break;
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case SR_UNIT_HERTZ:
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si_printf(value, out, "Hz");
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break;
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case SR_UNIT_PERCENTAGE:
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g_string_append_printf(out, "%f %%", value);
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break;
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case SR_UNIT_BOOLEAN:
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if (value > 0)
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g_string_append_printf(out, "TRUE");
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else
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g_string_append_printf(out, "FALSE");
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break;
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case SR_UNIT_SECOND:
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si_printf(value, out, "s");
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break;
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case SR_UNIT_SIEMENS:
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si_printf(value, out, "S");
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break;
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case SR_UNIT_DECIBEL_MW:
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si_printf(value, out, "dBu");
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break;
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case SR_UNIT_DECIBEL_VOLT:
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si_printf(value, out, "dBV");
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break;
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case SR_UNIT_DECIBEL_SPL:
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if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A)
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si_printf(value, out, "dB(A)");
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else if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_C)
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si_printf(value, out, "dB(C)");
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else if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_Z)
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si_printf(value, out, "dB(Z)");
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else
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/* No frequency weighting, or non-standard "flat" */
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si_printf(value, out, "dB(SPL)");
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if (mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_S)
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g_string_append(out, " S");
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else if (mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F)
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g_string_append(out, " F");
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if (mqflags & SR_MQFLAG_SPL_LAT)
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g_string_append(out, " LAT");
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else if (mqflags & SR_MQFLAG_SPL_PCT_OVER_ALARM)
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/* Not a standard function for SLMs, so this is
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* a made-up notation. */
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g_string_append(out, " %oA");
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break;
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case SR_UNIT_CONCENTRATION:
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g_string_append_printf(out, "%f ppm", value * 1000000);
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break;
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case SR_UNIT_REVOLUTIONS_PER_MINUTE:
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si_printf(value, out, "RPM");
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break;
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case SR_UNIT_VOLT_AMPERE:
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si_printf(value, out, "VA");
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break;
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case SR_UNIT_WATT:
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si_printf(value, out, "W");
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break;
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case SR_UNIT_WATT_HOUR:
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si_printf(value, out, "Wh");
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break;
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default:
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si_printf(value, out, "");
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break;
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}
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if (mqflags & SR_MQFLAG_AC)
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g_string_append_printf(out, " AC");
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if (mqflags & SR_MQFLAG_DC)
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g_string_append_printf(out, " DC");
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if (mqflags & SR_MQFLAG_RMS)
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g_string_append_printf(out, " RMS");
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if (mqflags & SR_MQFLAG_DIODE)
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g_string_append_printf(out, " DIODE");
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if (mqflags & SR_MQFLAG_HOLD)
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g_string_append_printf(out, " HOLD");
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if (mqflags & SR_MQFLAG_MAX)
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g_string_append_printf(out, " MAX");
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if (mqflags & SR_MQFLAG_MIN)
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g_string_append_printf(out, " MIN");
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if (mqflags & SR_MQFLAG_AUTORANGE)
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g_string_append_printf(out, " AUTO");
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if (mqflags & SR_MQFLAG_RELATIVE)
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g_string_append_printf(out, " REL");
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if (mqflags & SR_MQFLAG_AVG)
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g_string_append_printf(out, " AVG");
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g_string_append_c(out, '\n');
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}
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static int receive(struct sr_output *o, const struct sr_dev_inst *sdi,
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const struct sr_datafeed_packet *packet, GString **out)
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{
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const struct sr_datafeed_analog *analog;
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struct sr_channel *ch;
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GSList *l;
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const float *fdata;
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int i, p;
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(void)sdi;
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*out = NULL;
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if (!o || !o->sdi)
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return SR_ERR_ARG;
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switch (packet->type) {
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case SR_DF_FRAME_BEGIN:
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*out = g_string_new("FRAME-BEGIN\n");
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break;
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case SR_DF_FRAME_END:
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*out = g_string_new("FRAME-END\n");
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break;
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case SR_DF_ANALOG:
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analog = packet->payload;
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fdata = (const float *)analog->data;
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*out = g_string_sized_new(512);
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for (i = 0; i < analog->num_samples; i++) {
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for (l = analog->channels, p = 0; l; l = l->next, p++) {
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ch = l->data;
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g_string_append_printf(*out, "%s: ", ch->name);
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fancyprint(analog->unit, analog->mqflags,
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fdata[i + p], *out);
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}
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}
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break;
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}
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return SR_OK;
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}
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static int cleanup(struct sr_output *o)
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{
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struct context *ctx;
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if (!o || !o->sdi)
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return SR_ERR_ARG;
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ctx = o->internal;
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g_ptr_array_free(ctx->channellist, 1);
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g_free(ctx);
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o->internal = NULL;
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return SR_OK;
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}
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SR_PRIV struct sr_output_format output_analog = {
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.id = "analog",
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.description = "Analog data",
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.df_type = SR_DF_ANALOG,
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.init = init,
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.receive = receive,
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.cleanup = cleanup
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};
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