mic-985xx: Add support for the MIC 98581.

This device only supports temperature measurements, no humidity.

hardware/mic-985xx/api.c

@@ -35,11 +35,18 @@ static const int hwcaps[] = {
 	0,
 };
 
+SR_PRIV struct sr_dev_driver mic_98581_driver_info;
 SR_PRIV struct sr_dev_driver mic_98583_driver_info;
 
 SR_PRIV const struct mic_dev_info mic_devs[] = {
 	{
-		"MIC", "98583", "38400/8n2", 32000, TRUE, TRUE,
+		"MIC", "98581", "38400/8n2", 32000, TRUE, FALSE, 6,
+		packet_valid_temp,
+		&mic_98581_driver_info, receive_data_MIC_98581,
+	},
+	{
+		"MIC", "98583", "38400/8n2", 32000, TRUE, TRUE, 10,
+		packet_valid_temp_hum,
 		&mic_98583_driver_info, receive_data_MIC_98583,
 	},
 };
@@ -122,9 +129,11 @@ static GSList *scan(const char *conn, const char *serialcomm, int idx)
 		goto scan_cleanup;
 	sdi->probes = g_slist_append(sdi->probes, probe);
 
+	if (mic_devs[idx].has_humidity) {
 		if (!(probe = sr_probe_new(1, SR_PROBE_ANALOG, TRUE, "Humidity")))
 			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);
@@ -323,4 +332,5 @@ SR_PRIV struct sr_dev_driver ID##_driver_info = { \
 	.priv = NULL, \
 };
 
+DRV(mic_98581, MIC_98581, "mic-98581", "MIC 98581")
 DRV(mic_98583, MIC_98583, "mic-98583", "MIC 98583")

hardware/mic-985xx/protocol.c

@@ -20,8 +20,6 @@
 
 #include "protocol.h"
 
-#define PACKET_SIZE 10
-
 static int mic_send(struct sr_serial_dev_inst *serial, const char *cmd)
 {
 	int ret;
@@ -44,7 +42,18 @@ static int mic_cmd_set_realtime_mode(struct sr_serial_dev_inst *serial)
 	return mic_send(serial, "S 1 M 2 32 3\r");
 }
 
-static gboolean packet_valid(const uint8_t *buf)
+SR_PRIV gboolean packet_valid_temp(const uint8_t *buf)
+{
+	if (buf[0] != 'v' || buf[1] != ' ' || buf[5] != '\r')
+		return FALSE;
+
+	if (!isdigit(buf[2]) || !isdigit(buf[3]) || !isdigit(buf[4]))
+		return FALSE;
+
+	return TRUE;
+}
+
+SR_PRIV gboolean packet_valid_temp_hum(const uint8_t *buf)
 {
 	if (buf[0] != 'v' || buf[1] != ' ' || buf[5] != ' ' || buf[9] != '\r')
 		return FALSE;
@@ -58,11 +67,12 @@ static gboolean packet_valid(const uint8_t *buf)
 	return TRUE;
 }
 
-static int packet_parse(const char *buf, float *temp, float *humidity)
+static int packet_parse(const char *buf, int idx, float *temp, float *humidity)
 {
 	char tmp[4];
 
-	/* Packet format: "v ttt hhh\r". */
+	/* Packet format MIC98581: "v ttt\r". */
+	/* Packet format MIC98583: "v ttt hhh\r". */
 
 	/* TODO: Sanity check on buf. For now we assume well-formed ASCII. */
 
@@ -71,8 +81,10 @@ static int packet_parse(const char *buf, float *temp, float *humidity)
 	strncpy((char *)&tmp, &buf[2], 3);
 	*temp = g_ascii_strtoull((const char *)&tmp, NULL, 10) / 10;
 
+	if (mic_devs[idx].has_humidity) {
 		strncpy((char *)&tmp, &buf[6], 3);
 		*humidity = g_ascii_strtoull((const char *)&tmp, NULL, 10) / 10;
+	}
 
 	return SR_OK;
 }
@@ -90,7 +102,7 @@ static int handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, int idx)
 
 	devc = sdi->priv;
 
-	ret = packet_parse((const char *)buf, &temperature, &humidity);
+	ret = packet_parse((const char *)buf, idx, &temperature, &humidity);
 	if (ret < 0) {
 		sr_err("Failed to parse packet.");
 		return SR_ERR;
@@ -112,6 +124,7 @@ static int handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, int idx)
 	g_slist_free(l);
 
 	/* Humidity. */
+	if (mic_devs[idx].has_humidity) {
 		l = g_slist_copy(sdi->probes);
 		l = g_slist_remove_link(l, g_slist_nth(l, 0));
 		analog.probes = l;
@@ -120,6 +133,7 @@ static int handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, int idx)
 		analog.data = &humidity;
 		sr_session_send(devc->cb_data, &packet);
 		g_slist_free(l);
+	}
 
 	devc->num_samples++;
 
@@ -144,10 +158,10 @@ static void handle_new_data(struct sr_dev_inst *sdi, int idx)
 	devc->buflen += len;
 
 	/* Now look for packets in that data. */
-	while ((devc->buflen - offset) >= PACKET_SIZE) {
+	while ((devc->buflen - offset) >= mic_devs[idx].packet_size) {
-		if (packet_valid(devc->buf + offset)) {
+		if (mic_devs[idx].packet_valid(devc->buf + offset)) {
 			handle_packet(devc->buf + offset, sdi, idx);
-			offset += PACKET_SIZE;
+			offset += mic_devs[idx].packet_size;
 		} else {
 			offset++;
 		}
@@ -208,4 +222,5 @@ SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \
 	return receive_data(fd, revents, ID_UPPER, cb_data); }
 
 /* Driver-specific receive_data() wrappers */
+RECEIVE_DATA(MIC_98581)
 RECEIVE_DATA(MIC_98583)

hardware/mic-985xx/protocol.h

@@ -39,10 +39,11 @@
 
 /* Note: When adding entries here, don't forget to update MIC_DEV_COUNT. */
 enum {
+	MIC_98581,
 	MIC_98583,
 };
 
-#define MIC_DEV_COUNT 1
+#define MIC_DEV_COUNT 2
 
 struct mic_dev_info {
 	char *vendor;
@@ -51,6 +52,8 @@ struct mic_dev_info {
 	uint32_t max_sample_points;
 	gboolean has_temperature;
 	gboolean has_humidity;
+	uint8_t packet_size;
+	gboolean (*packet_valid)(const uint8_t *);
 	struct sr_dev_driver *di;
 	int (*receive_data)(int, int, void *);
 };
@@ -82,6 +85,10 @@ struct dev_context {
 	int buflen;
 };
 
+SR_PRIV gboolean packet_valid_temp(const uint8_t *buf);
+SR_PRIV gboolean packet_valid_temp_hum(const uint8_t *buf);
+
+SR_PRIV int receive_data_MIC_98581(int fd, int revents, void *cb_data);
 SR_PRIV int receive_data_MIC_98583(int fd, int revents, void *cb_data);
 
 SR_PRIV int mic_cmd_get_device_info(struct sr_serial_dev_inst *serial);

hwdriver.c

@@ -96,6 +96,7 @@ extern SR_PRIV struct sr_dev_driver demo_driver_info;
 extern SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info;
 #endif
 #ifdef HAVE_HW_MIC_985XX
+extern SR_PRIV struct sr_dev_driver mic_98581_driver_info;
 extern SR_PRIV struct sr_dev_driver mic_98583_driver_info;
 #endif
 #ifdef HAVE_HW_NEXUS_OSCIPRIME
@@ -176,6 +177,7 @@ static struct sr_dev_driver *drivers_list[] = {
 	&lascar_el_usb_driver_info,
 #endif
 #ifdef HAVE_HW_MIC_985XX
+	&mic_98581_driver_info,
 	&mic_98583_driver_info,
 #endif
 #ifdef HAVE_HW_NEXUS_OSCIPRIME