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libsigrok/output/analog.c

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sr: add new analog output module This outputs text representation of SR_DF_ANALOG packets. Unlike the float module however, it also outputs the standard abbreviations of SI units corresponding to the packet's MQ and unit. It also makes an effort to multiply or divide the floating point value as needed to the nearest multiple or fraction, and inserts the appropriate SI prefix to match.
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/*
* This file is part of the sigrok 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 <stdlib.h>
#include <string.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include <math.h>
struct context {
int num_enabled_probes;
GPtrArray *probelist;
GString *out;
};
static int init(struct sr_output *o)
{
struct context *ctx;
struct sr_probe *probe;
GSList *l;
sr_spew("output/analog: initializing");
if (!o || !o->sdi)
return SR_ERR_ARG;
Return SR_ERR_MALLOC upon allocation errors. Add some TODOs.
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if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
sr_err("output/analog: Context malloc failed.");
sr: add new analog output module This outputs text representation of SR_DF_ANALOG packets. Unlike the float module however, it also outputs the standard abbreviations of SI units corresponding to the packet's MQ and unit. It also makes an effort to multiply or divide the floating point value as needed to the nearest multiple or fraction, and inserts the appropriate SI prefix to match.
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return SR_ERR_MALLOC;
Return SR_ERR_MALLOC upon allocation errors. Add some TODOs.
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}
sr: add new analog output module This outputs text representation of SR_DF_ANALOG packets. Unlike the float module however, it also outputs the standard abbreviations of SI units corresponding to the packet's MQ and unit. It also makes an effort to multiply or divide the floating point value as needed to the nearest multiple or fraction, and inserts the appropriate SI prefix to match.
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o->internal = ctx;
/* Get the number of probes and their names. */
ctx->probelist = g_ptr_array_new();
for (l = o->sdi->probes; l; l = l->next) {
probe = l->data;
if (!probe || !probe->enabled)
continue;
g_ptr_array_add(ctx->probelist, probe->name);
ctx->num_enabled_probes++;
}
ctx->out = g_string_sized_new(512);
return SR_OK;
}
static void si_printf(float value, GString *out, char *unitstr)
{
analog: sane printing of very small and negative values
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float v;
sr: add new analog output module This outputs text representation of SR_DF_ANALOG packets. Unlike the float module however, it also outputs the standard abbreviations of SI units corresponding to the packet's MQ and unit. It also makes an effort to multiply or divide the floating point value as needed to the nearest multiple or fraction, and inserts the appropriate SI prefix to match.
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analog: sane printing of very small and negative values
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if (signbit(value))
v = -(value);
else
v = value;
if (v < 1e-12 || v > 1e+12)
g_string_append_printf(out, "%f %s", value, unitstr);
else if (v > 1e+9)
g_string_append_printf(out, "%f G%s", value / 1e+9, unitstr);
else if (v > 1e+6)
g_string_append_printf(out, "%f M%s", value / 1e+6, unitstr);
else if (v > 1e+3)
g_string_append_printf(out, "%f k%s", value / 1e+3, unitstr);
else if (v < 1e-9)
g_string_append_printf(out, "%f n%s", value * 1e+9, unitstr);
else if (v < 1e-6)
g_string_append_printf(out, "%f u%s", value * 1e+6, unitstr);
else if (v < 1e-3)
g_string_append_printf(out, "%f m%s", value * 1e+3, unitstr);
sr: add new analog output module This outputs text representation of SR_DF_ANALOG packets. Unlike the float module however, it also outputs the standard abbreviations of SI units corresponding to the packet's MQ and unit. It also makes an effort to multiply or divide the floating point value as needed to the nearest multiple or fraction, and inserts the appropriate SI prefix to match.
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else
g_string_append_printf(out, "%f %s", value, unitstr);
}
static void fancyprint(int unit, int mqflags, float value, GString *out)
{
switch (unit) {
case SR_UNIT_VOLT:
si_printf(value, out, "V");
break;
case SR_UNIT_AMPERE:
si_printf(value, out, "A");
break;
case SR_UNIT_OHM:
si_printf(value, out, "");
g_string_append_unichar(out, 0x2126);
break;
case SR_UNIT_FARAD:
si_printf(value, out, "F");
break;
case SR_UNIT_KELVIN:
si_printf(value, out, "K");
break;
case SR_UNIT_CELSIUS:
si_printf(value, out, "");
g_string_append_unichar(out, 0x00b0);
g_string_append_c(out, 'C');
break;
case SR_UNIT_FAHRENHEIT:
si_printf(value, out, "");
g_string_append_unichar(out, 0x00b0);
g_string_append_c(out, 'F');
break;
case SR_UNIT_HERTZ:
si_printf(value, out, "Hz");
break;
case SR_UNIT_PERCENTAGE:
g_string_append_printf(out, "%f%%", value);
break;
case SR_UNIT_BOOLEAN:
if (value > 0)
g_string_append_printf(out, "TRUE");
else
g_string_append_printf(out, "FALSE");
break;
sr: add support for pulse width measurements
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case SR_UNIT_SECOND:
si_printf(value, out, "s");
break;
sr: add support for conductance measurements in Siemens
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case SR_UNIT_SIEMENS:
si_printf(value, out, "S");
break;
analog: add pretty-printer for dBu and dBV
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case SR_UNIT_DECIBEL_MW:
si_printf(value, out, "dBu");
break;
case SR_UNIT_DECIBEL_VOLT:
si_printf(value, out, "dBV");
break;
output/analog: add support for sound pressure level
2012-11-02 14:19:01 +00:00
case SR_UNIT_DECIBEL_SPL:
if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A)
si_printf(value, out, "dB(A)");
else if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_C)
si_printf(value, out, "dB(C)");
else if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_Z)
si_printf(value, out, "dB(Z)");
else
/* No frequency weighting, or non-standard "flat" */
si_printf(value, out, "dB(SPL)");
if (mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_S)
g_string_append(out, " S");
else if (mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F)
g_string_append(out, " F");
if (mqflags & SR_MQFLAG_SPL_LAT)
g_string_append(out, " LAT");
else if (mqflags & SR_MQFLAG_SPL_PCT_OVER_ALARM)
/* Not a standard function for SLMs, so this is
* a made-up notation. */
g_string_append(out, " %oA");
break;
analog: if no MQ unit was set of recognized, just print the value
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default:
si_printf(value, out, "");
sr: add new analog output module This outputs text representation of SR_DF_ANALOG packets. Unlike the float module however, it also outputs the standard abbreviations of SI units corresponding to the packet's MQ and unit. It also makes an effort to multiply or divide the floating point value as needed to the nearest multiple or fraction, and inserts the appropriate SI prefix to match.
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}
analog: support AC+DC unit modifier
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if ((mqflags & (SR_MQFLAG_AC | SR_MQFLAG_DC)) == (SR_MQFLAG_AC | SR_MQFLAG_DC))
g_string_append_printf(out, " AC+DC");
else if (mqflags & SR_MQFLAG_AC)
sr: add new analog output module This outputs text representation of SR_DF_ANALOG packets. Unlike the float module however, it also outputs the standard abbreviations of SI units corresponding to the packet's MQ and unit. It also makes an effort to multiply or divide the floating point value as needed to the nearest multiple or fraction, and inserts the appropriate SI prefix to match.
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g_string_append_printf(out, " AC");
else if (mqflags & SR_MQFLAG_DC)
g_string_append_printf(out, " DC");
g_string_append_c(out, '\n');
}
Build fix for Windows/MinGW. On Window/MinGW 'recv' seems to be already defined in some headers. Use 'receive' instead, for now.
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static GString *receive(struct sr_output *o, const struct sr_dev_inst *sdi,
sr: add new analog output module This outputs text representation of SR_DF_ANALOG packets. Unlike the float module however, it also outputs the standard abbreviations of SI units corresponding to the packet's MQ and unit. It also makes an effort to multiply or divide the floating point value as needed to the nearest multiple or fraction, and inserts the appropriate SI prefix to match.
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struct sr_datafeed_packet *packet)
{
struct sr_datafeed_analog *analog;
struct context *ctx;
float *fdata;
int i, j;
analog: add pretty-printer for dBu and dBV
2012-10-16 21:31:18 +00:00
(void)sdi;
sr: add new analog output module This outputs text representation of SR_DF_ANALOG packets. Unlike the float module however, it also outputs the standard abbreviations of SI units corresponding to the packet's MQ and unit. It also makes an effort to multiply or divide the floating point value as needed to the nearest multiple or fraction, and inserts the appropriate SI prefix to match.
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if (!o || !o->sdi)
return NULL;
ctx = o->internal;
g_string_set_size(ctx->out, 0);
switch (packet->type) {
case SR_DF_HEADER:
break;
case SR_DF_FRAME_BEGIN:
g_string_append_printf(ctx->out, "FRAME-BEGIN\n");
break;
case SR_DF_FRAME_END:
g_string_append_printf(ctx->out, "FRAME-END\n");
break;
case SR_DF_ANALOG:
analog = packet->payload;
fdata = (float *)analog->data;
for (i = 0; i < analog->num_samples; i++) {
for (j = 0; j < ctx->num_enabled_probes; j++) {
g_string_append_printf(ctx->out, "%s: ",
(char *)g_ptr_array_index(ctx->probelist, j));
fancyprint(analog->unit, analog->mqflags,
fdata[i + j], ctx->out);
}
}
break;
}
return ctx->out;
}
static int cleanup(struct sr_output *o)
{
struct context *ctx;
if (!o || !o->sdi)
return SR_ERR_ARG;
ctx = o->internal;
g_ptr_array_free(ctx->probelist, 1);
g_string_free(ctx->out, 1);
g_free(ctx);
o->internal = NULL;
return SR_OK;
}
SR_PRIV struct sr_output_format output_analog = {
.id = "analog",
.description = "Analog data",
.df_type = SR_DF_ANALOG,
.init = init,
Build fix for Windows/MinGW. On Window/MinGW 'recv' seems to be already defined in some headers. Use 'receive' instead, for now.
2012-10-16 10:08:01 +00:00
.recv = receive,
sr: add new analog output module This outputs text representation of SR_DF_ANALOG packets. Unlike the float module however, it also outputs the standard abbreviations of SI units corresponding to the packet's MQ and unit. It also makes an effort to multiply or divide the floating point value as needed to the nearest multiple or fraction, and inserts the appropriate SI prefix to match.
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.cleanup = cleanup
};