libsigrok/hardware/teleinfo/protocol.c

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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2013 Aurelien Jacobs <aurel@gnuage.org>
*
* 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/>.
*/
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#include <stdlib.h>
#include <string.h>
#include <glib.h>
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#include "protocol.h"
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#define STX 0x02
#define ETX 0x03
#define EOT 0x04
#define LF 0x0A
#define CR 0x0D
static gboolean teleinfo_control_check(char *label, char *data, char control)
{
int sum = 0;
while (*label)
sum += *label++;
sum += ' ';
while (*data)
sum += *data++;
return ((sum & 0x3F) + ' ') == control;
}
static gint teleinfo_probe_compare(gconstpointer a, gconstpointer b)
{
const struct sr_probe *probe = a;
const char *name = b;
return strcmp(probe->name, name);
}
static struct sr_probe *teleinfo_find_probe(struct sr_dev_inst *sdi,
const char *name)
{
GSList *elem = g_slist_find_custom(sdi->probes, name,
teleinfo_probe_compare);
return elem ? elem->data : NULL;
}
static void teleinfo_send_value(struct sr_dev_inst *sdi, const char *probe_name,
float value, int mq, int unit)
{
struct dev_context *devc;
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struct sr_datafeed_packet packet;
struct sr_datafeed_analog analog;
struct sr_probe *probe;
devc = sdi->priv;
probe = teleinfo_find_probe(sdi, probe_name);
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if (!probe || !probe->enabled)
return;
memset(&analog, 0, sizeof(struct sr_datafeed_analog));
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analog.probes = g_slist_append(analog.probes, probe);
analog.num_samples = 1;
analog.mq = mq;
analog.unit = unit;
analog.data = &value;
packet.type = SR_DF_ANALOG;
packet.payload = &analog;
sr_session_send(devc->session_cb_data, &packet);
g_slist_free(analog.probes);
}
static void teleinfo_handle_mesurement(struct sr_dev_inst *sdi,
const char *label, const char *data,
char *optarif)
{
struct dev_context *devc;
int v = atoi(data);
if (!sdi || !(devc = sdi->priv)) {
if (optarif && !strcmp(label, "OPTARIF"))
strcpy(optarif, data);
return;
}
if (!strcmp(label, "ADCO")) {
devc->num_samples++;
} else if (!strcmp(label, "BASE")) {
teleinfo_send_value(sdi, "BASE", v, SR_MQ_POWER, SR_UNIT_WATT_HOUR);
} else if (!strcmp(label, "HCHP")) {
teleinfo_send_value(sdi, "HP" , v, SR_MQ_POWER, SR_UNIT_WATT_HOUR);
} else if (!strcmp(label, "HCHC")) {
teleinfo_send_value(sdi, "HC" , v, SR_MQ_POWER, SR_UNIT_WATT_HOUR);
} else if (!strcmp(label, "EJPHN")) {
teleinfo_send_value(sdi, "HN" , v, SR_MQ_POWER, SR_UNIT_WATT_HOUR);
} else if (!strcmp(label, "EJPHPM")) {
teleinfo_send_value(sdi, "HPM" , v, SR_MQ_POWER, SR_UNIT_WATT_HOUR);
} else if (!strcmp(label, "BBRHPJB")) {
teleinfo_send_value(sdi, "HPJB", v, SR_MQ_POWER, SR_UNIT_WATT_HOUR);
} else if (!strcmp(label, "BBRHPJW")) {
teleinfo_send_value(sdi, "HPJW", v, SR_MQ_POWER, SR_UNIT_WATT_HOUR);
} else if (!strcmp(label, "BBRHPJR")) {
teleinfo_send_value(sdi, "HPJR", v, SR_MQ_POWER, SR_UNIT_WATT_HOUR);
} else if (!strcmp(label, "BBRHCJB")) {
teleinfo_send_value(sdi, "HCJB", v, SR_MQ_POWER, SR_UNIT_WATT_HOUR);
} else if (!strcmp(label, "BBRHCJW")) {
teleinfo_send_value(sdi, "HCJW", v, SR_MQ_POWER, SR_UNIT_WATT_HOUR);
} else if (!strcmp(label, "BBRHCJR")) {
teleinfo_send_value(sdi, "HCJR", v, SR_MQ_POWER, SR_UNIT_WATT_HOUR);
} else if (!strcmp(label, "IINST")) {
teleinfo_send_value(sdi, "IINST", v, SR_MQ_CURRENT, SR_UNIT_AMPERE);
} else if (!strcmp(label, "PAPP")) {
teleinfo_send_value(sdi, "PAPP", v, SR_MQ_POWER, SR_UNIT_VOLT_AMPERE);
}
}
static gboolean teleinfo_parse_group(struct sr_dev_inst *sdi,
const uint8_t *group, char *optarif)
{
char label[9], data[13], control, cr;
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const char *str = (const char *)group;
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if (sscanf(str, "\x0A%8s %13s %c%c", label, data, &control, &cr) != 4
|| cr != CR)
return FALSE;
if (!teleinfo_control_check(label, data, control))
return FALSE;
teleinfo_handle_mesurement(sdi, label, data, optarif);
return TRUE;
}
static const uint8_t *teleinfo_parse_data(struct sr_dev_inst *sdi,
const uint8_t *buf, int len,
char *optarif)
{
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const uint8_t *group_start, *group_end;
group_start = memchr(buf, LF, len);
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if (!group_start)
return NULL;
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group_end = memchr(group_start, CR, len - (group_start - buf));
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if (!group_end)
return NULL;
teleinfo_parse_group(sdi, group_start, optarif);
return group_end + 1;
}
SR_PRIV int teleinfo_get_optarif(const uint8_t *buf)
{
const uint8_t *ptr = buf;
char optarif[5] = { 0 };
while ((ptr = teleinfo_parse_data(NULL, ptr, 292-(ptr-buf), optarif)));
if (!strcmp(optarif, "BASE"))
return OPTARIF_BASE;
else if (!strcmp(optarif, "HC.."))
return OPTARIF_HC;
else if (!strcmp(optarif, "EJP."))
return OPTARIF_EJP;
else if (!strncmp(optarif, "BBR", 3))
return OPTARIF_BBR;
return OPTARIF_NONE;
}
SR_PRIV gboolean teleinfo_packet_valid(const uint8_t *buf)
{
return !!teleinfo_get_optarif(buf);
}
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SR_PRIV int teleinfo_receive_data(int fd, int revents, void *cb_data)
{
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struct sr_dev_inst *sdi;
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struct dev_context *devc;
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struct sr_serial_dev_inst *serial;
const uint8_t *ptr, *next_ptr, *end_ptr;
int len;
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int64_t time;
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(void)fd;
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if (!(sdi = cb_data) || !(devc = sdi->priv) || revents != G_IO_IN)
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return TRUE;
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serial = sdi->conn;
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/* Try to get as much data as the buffer can hold. */
len = TELEINFO_BUF_SIZE - devc->buf_len;
len = serial_read(serial, devc->buf + devc->buf_len, len);
if (len < 1) {
sr_err("Serial port read error: %d.", len);
return FALSE;
}
devc->buf_len += len;
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/* Now look for packets in that data. */
ptr = devc->buf;
end_ptr = ptr + devc->buf_len;
while ((next_ptr = teleinfo_parse_data(sdi, ptr, end_ptr - ptr, NULL)))
ptr = next_ptr;
/* If we have any data left, move it to the beginning of our buffer. */
memmove(devc->buf, ptr, end_ptr - ptr);
devc->buf_len -= ptr - devc->buf;
/* If buffer is full and no valid packet was found, wipe buffer. */
if (devc->buf_len >= TELEINFO_BUF_SIZE) {
devc->buf_len = 0;
return FALSE;
}
if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
sr_info("Requested number of samples reached.");
sdi->driver->dev_acquisition_stop(sdi, devc->session_cb_data);
return TRUE;
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}
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if (devc->limit_msec) {
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time = (g_get_monotonic_time() - devc->start_time) / 1000;
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if (time > (int64_t)devc->limit_msec) {
sr_info("Requested time limit reached.");
sdi->driver->dev_acquisition_stop(sdi, devc->session_cb_data);
return TRUE;
}
}
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return TRUE;
}