From: Aurelien Jacobs <redacted>
Date: Thu, 3 Oct 2013 19:20:18 +0000 (+0200)
Subject: teleinfo: actual parser implementation
X-Git-Tag: libsigrok-0.2.2~31
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=5542bee61b0e18e9ae3fa6edb361b8ed1bb77425;p=libsigrok.git

teleinfo: actual parser implementation
---

diff --git a/hardware/teleinfo/api.c b/hardware/teleinfo/api.c
index 4d8cecf0..604dec7c 100644
--- a/hardware/teleinfo/api.c
+++ b/hardware/teleinfo/api.c
@@ -17,8 +17,24 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <stdlib.h>
+#include <glib.h>
+#include "libsigrok.h"
+#include "libsigrok-internal.h"
 #include "protocol.h"
 
+static const int32_t hwopts[] = {
+	SR_CONF_CONN,
+	SR_CONF_SERIALCOMM,
+};
+
+static const int32_t hwcaps[] = {
+	SR_CONF_ENERGYMETER,
+	SR_CONF_LIMIT_SAMPLES,
+	SR_CONF_LIMIT_MSEC,
+	SR_CONF_CONTINUOUS,
+};
+
 SR_PRIV struct sr_dev_driver teleinfo_driver_info;
 static struct sr_dev_driver *di = &teleinfo_driver_info;
 
@@ -30,16 +46,120 @@ static int init(struct sr_context *sr_ctx)
 static GSList *scan(GSList *options)
 {
 	struct drv_context *drvc;
-	GSList *devices;
+	struct dev_context *devc;
+	struct sr_serial_dev_inst *serial;
+	struct sr_dev_inst *sdi;
+	struct sr_probe *probe;
+	GSList *devices = NULL, *l;
+	const char *conn = NULL, *serialcomm = NULL;
+	uint8_t buf[292];
+	size_t len = sizeof(buf);
+
+	for (l = options; l; l = l->next) {
+		struct sr_config *src = l->data;
+		switch (src->key) {
+		case SR_CONF_CONN:
+			conn = g_variant_get_string(src->data, NULL);
+			break;
+		case SR_CONF_SERIALCOMM:
+			serialcomm = g_variant_get_string(src->data, NULL);
+			break;
+		}
+	}
+	if (!conn)
+		return NULL;
+	if (!serialcomm)
+		serialcomm = "1200/7e1";
+
+	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
+		return NULL;
+	if (serial_open(serial, SERIAL_RDONLY | SERIAL_NONBLOCK) != SR_OK)
+		return NULL;
 
-	(void)options;
+	sr_info("Probing serial port %s.", conn);
 
-	devices = NULL;
 	drvc = di->priv;
 	drvc->instances = NULL;
+	serial_flush(serial);
+
+	/* Let's get a bit of data and see if we can find a packet. */
+	if (serial_stream_detect(serial, buf, &len, len,
+	                         teleinfo_packet_valid, 3000, 1200) != SR_OK)
+		goto scan_cleanup;
+
+	sr_info("Found device on port %s.", conn);
+
+	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "EDF", "Teleinfo", "")))
+		goto scan_cleanup;
+
+	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
+		sr_err("Device context malloc failed.");
+		goto scan_cleanup;
+	}
+
+	devc->optarif = teleinfo_get_optarif(buf);
+
+	sdi->inst_type = SR_INST_SERIAL;
+	sdi->conn = serial;
+	sdi->priv = devc;
+	sdi->driver = di;
+
+	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P")))
+		goto scan_cleanup;
+	sdi->probes = g_slist_append(sdi->probes, probe);
+
+	if (devc->optarif == OPTARIF_BASE) {
+		if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "BASE")))
+			goto scan_cleanup;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+	} else if (devc->optarif == OPTARIF_HC) {
+		if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "HP")))
+			goto scan_cleanup;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+		if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "HC")))
+			goto scan_cleanup;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+	} else if (devc->optarif == OPTARIF_EJP) {
+		if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "HN")))
+			goto scan_cleanup;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+		if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "HPM")))
+			goto scan_cleanup;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+	} else if (devc->optarif == OPTARIF_BBR) {
+		if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "HPJB")))
+			goto scan_cleanup;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+		if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "HPJW")))
+			goto scan_cleanup;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+		if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "HPJR")))
+			goto scan_cleanup;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+		if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "HCJB")))
+			goto scan_cleanup;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+		if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "HCJW")))
+			goto scan_cleanup;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+		if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "HCJR")))
+			goto scan_cleanup;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+	}
+
+	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "IINST")))
+		goto scan_cleanup;
+	sdi->probes = g_slist_append(sdi->probes, probe);
 
-	/* TODO: scan for devices, either based on a SR_CONF_CONN option
-	 * or on a USB scan. */
+	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "PAPP")))
+		goto scan_cleanup;
+	sdi->probes = g_slist_append(sdi->probes, probe);
+
+	drvc->instances = g_slist_append(drvc->instances, sdi);
+	devices = g_slist_append(devices, sdi);
+
+scan_cleanup:
+	serial_close(serial);
 
 	return devices;
 }
@@ -56,9 +176,10 @@ static int dev_clear(void)
 
 static int dev_open(struct sr_dev_inst *sdi)
 {
-	(void)sdi;
+	struct sr_serial_dev_inst *serial = sdi->conn;
 
-	/* TODO: get handle from sdi->conn and open it. */
+	if (serial_open(serial, SERIAL_RDONLY | SERIAL_NONBLOCK) != SR_OK)
+		return SR_ERR;
 
 	sdi->status = SR_ST_ACTIVE;
 
@@ -67,104 +188,107 @@ static int dev_open(struct sr_dev_inst *sdi)
 
 static int dev_close(struct sr_dev_inst *sdi)
 {
-	(void)sdi;
+	struct sr_serial_dev_inst *serial = sdi->conn;
 
-	/* TODO: get handle from sdi->conn and close it. */
-
-	sdi->status = SR_ST_INACTIVE;
+	if (serial && serial->fd != -1) {
+		serial_close(serial);
+		sdi->status = SR_ST_INACTIVE;
+	}
 
 	return SR_OK;
 }
 
 static int cleanup(void)
 {
-	dev_clear();
-
-	/* TODO: free other driver resources, if any. */
-
-	return SR_OK;
-}
-
-static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
-{
-	int ret;
-
-	(void)sdi;
-	(void)data;
-
-	ret = SR_OK;
-	switch (key) {
-	/* TODO */
-	default:
-		return SR_ERR_NA;
-	}
-
-	return ret;
+	return dev_clear();
 }
 
 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
 {
-	int ret;
-
-	(void)data;
+	struct dev_context *devc;
 
 	if (sdi->status != SR_ST_ACTIVE)
 		return SR_ERR_DEV_CLOSED;
 
-	ret = SR_OK;
+	if (!(devc = sdi->priv)) {
+		sr_err("sdi->priv was NULL.");
+		return SR_ERR_BUG;
+	}
+
 	switch (key) {
-	/* TODO */
+	case SR_CONF_LIMIT_SAMPLES:
+		devc->limit_samples = g_variant_get_uint64(data);
+		sr_dbg("Setting sample limit to %" PRIu64 ".", devc->limit_samples);
+		break;
+	case SR_CONF_LIMIT_MSEC:
+		devc->limit_msec = g_variant_get_uint64(data);
+		sr_dbg("Setting time limit to %" PRIu64 "ms.", devc->limit_msec);
+		break;
 	default:
-		ret = SR_ERR_NA;
+		return SR_ERR_NA;
 	}
 
-	return ret;
+	return SR_OK;
 }
 
 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
 {
-	int ret;
-
 	(void)sdi;
-	(void)data;
 
-	ret = SR_OK;
 	switch (key) {
-	/* TODO */
+	case SR_CONF_SCAN_OPTIONS:
+		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+				hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
+		break;
+	case SR_CONF_DEVICE_OPTIONS:
+		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+				hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
+		break;
 	default:
 		return SR_ERR_NA;
 	}
 
-	return ret;
+	return SR_OK;
 }
 
-static int dev_acquisition_start(const struct sr_dev_inst *sdi,
-				    void *cb_data)
+static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 {
-	(void)sdi;
-	(void)cb_data;
+	struct sr_serial_dev_inst *serial = sdi->conn;
+	struct dev_context *devc;
 
 	if (sdi->status != SR_ST_ACTIVE)
 		return SR_ERR_DEV_CLOSED;
 
-	/* TODO: configure hardware, reset acquisition state, set up
-	 * callbacks and send header packet. */
+	if (!(devc = sdi->priv)) {
+		sr_err("sdi->priv was NULL.");
+		return SR_ERR_BUG;
+	}
 
-	return SR_OK;
-}
+	devc->session_cb_data = cb_data;
 
-static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
-{
-	(void)cb_data;
+	/*
+	 * Reset the number of samples to take. If we've already collected our
+	 * quota, but we start a new session, and don't reset this, we'll just
+	 * quit without acquiring any new samples.
+	 */
+	devc->num_samples = 0;
+	devc->start_time = g_get_monotonic_time();
 
-	if (sdi->status != SR_ST_ACTIVE)
-		return SR_ERR_DEV_CLOSED;
+	/* Send header packet to the session bus. */
+	std_session_send_df_header(cb_data, LOG_PREFIX);
 
-	/* TODO: stop acquisition. */
+	/* Poll every 50ms, or whenever some data comes in. */
+	sr_source_add(serial->fd, G_IO_IN, 50, teleinfo_receive_data, (void *)sdi);
 
 	return SR_OK;
 }
 
+static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
+{
+	return std_dev_acquisition_stop_serial(sdi, cb_data, dev_close,
+	                                       sdi->conn, LOG_PREFIX);
+}
+
 SR_PRIV struct sr_dev_driver teleinfo_driver_info = {
 	.name = "teleinfo",
 	.longname = "Teleinfo",
@@ -174,12 +298,10 @@ SR_PRIV struct sr_dev_driver teleinfo_driver_info = {
 	.scan = scan,
 	.dev_list = dev_list,
 	.dev_clear = dev_clear,
-	.config_get = config_get,
 	.config_set = config_set,
 	.config_list = config_list,
 	.dev_open = dev_open,
 	.dev_close = dev_close,
 	.dev_acquisition_start = dev_acquisition_start,
 	.dev_acquisition_stop = dev_acquisition_stop,
-	.priv = NULL,
 };
diff --git a/hardware/teleinfo/protocol.c b/hardware/teleinfo/protocol.c
index a7fde947..28dfcfa1 100644
--- a/hardware/teleinfo/protocol.c
+++ b/hardware/teleinfo/protocol.c
@@ -17,24 +17,215 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <stdlib.h>
+#include <string.h>
+#include <glib.h>
 #include "protocol.h"
 
+#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 = sdi->priv;
+	struct sr_datafeed_packet packet;
+	struct sr_datafeed_analog analog = { 0 };
+	struct sr_probe *probe = teleinfo_find_probe(sdi, probe_name);
+
+	if (!probe || !probe->enabled)
+		return;
+
+	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;
+	const char *str = (const char *) group;
+	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)
+{
+	const uint8_t *group_start = memchr(buf, LF, len);
+	if (!group_start)
+		return NULL;
+
+	const uint8_t *group_end = memchr(group_start, CR,
+	                                  len - (group_start - buf));
+	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);
+}
+
 SR_PRIV int teleinfo_receive_data(int fd, int revents, void *cb_data)
 {
-	const struct sr_dev_inst *sdi;
+	struct sr_dev_inst *sdi;
 	struct dev_context *devc;
+	struct sr_serial_dev_inst *serial;
+	const uint8_t *ptr, *next_ptr, *end_ptr;
+	int len;
 
 	(void)fd;
 
-	if (!(sdi = cb_data))
+	if (!(sdi = cb_data) || !(devc = sdi->priv) || revents != G_IO_IN)
 		return TRUE;
+	serial = sdi->conn;
 
-	if (!(devc = sdi->priv))
-		return TRUE;
+	/* 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;
 
-	if (revents == G_IO_IN) {
-		/* TODO */
+	/* 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;
 	}
 
+	if (devc->limit_msec) {
+		int64_t time = (g_get_monotonic_time() - devc->start_time) / 1000;
+		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;
+		}
+	}
 	return TRUE;
 }
diff --git a/hardware/teleinfo/protocol.h b/hardware/teleinfo/protocol.h
index 3485d106..46d2efb3 100644
--- a/hardware/teleinfo/protocol.h
+++ b/hardware/teleinfo/protocol.h
@@ -34,18 +34,35 @@
 #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
 #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
 
+enum optarif {
+	OPTARIF_NONE,
+	OPTARIF_BASE,
+	OPTARIF_HC,
+	OPTARIF_EJP,
+	OPTARIF_BBR,
+};
+
+#define TELEINFO_BUF_SIZE 256
+
 /** Private, per-device-instance driver context. */
 struct dev_context {
-	/* Model-specific information */
-
 	/* Acquisition settings */
+	uint64_t limit_samples;   /**< The sampling limit (in number of samples). */
+	uint64_t limit_msec;      /**< The time limit (in milliseconds). */
+	void *session_cb_data;    /**< Opaque pointer passed in by the frontend. */
 
 	/* Operational state */
+	enum optarif optarif;     /**< The device mode (which mesures are reported) */
+	uint64_t num_samples;     /**< The number of already received samples. */
+	int64_t start_time;       /**< The time at which sampling started. */
 
 	/* Temporary state across callbacks */
-
+	uint8_t buf[TELEINFO_BUF_SIZE];
+	int buf_len;
 };
 
+SR_PRIV gboolean teleinfo_packet_valid(const uint8_t *buf);
 SR_PRIV int teleinfo_receive_data(int fd, int revents, void *cb_data);
+SR_PRIV int teleinfo_get_optarif(const uint8_t *buf);
 
 #endif