+typedef enum {
+ LIVE_DATA = 0x00,
+ LOG_METADATA = 0x11,
+ LOG_DATA = 0x14,
+ LOG_START = 0x18,
+ LOG_END = 0x19,
+} PacketType;
+
+static gboolean appa_55ii_checksum(const uint8_t *buf)
+{
+ int i, size = buf[3]+4, checksum = 0;
+ for (i=0; i<size; i++)
+ checksum += buf[i];
+ return buf[size] == (checksum & 0xFF);
+}
+
+SR_PRIV gboolean appa_55ii_packet_valid(const uint8_t *buf)
+{
+ if (buf[0] == 0x55 && buf[1] == 0x55 && buf[3] <= 32
+ && appa_55ii_checksum(buf))
+ return TRUE;
+ return FALSE;
+}
+
+static uint64_t appa_55ii_flags(const uint8_t *buf)
+{
+ uint8_t disp_mode = buf[4+13];
+ uint64_t flags = 0;
+
+ if ((disp_mode & 0xF0) == 0x20) flags |= SR_MQFLAG_HOLD;
+ if ((disp_mode & 0x0C) == 0x04) flags |= SR_MQFLAG_MAX;
+ if ((disp_mode & 0x0C) == 0x08) flags |= SR_MQFLAG_MIN;
+ if ((disp_mode & 0x0C) == 0x0C) flags |= SR_MQFLAG_AVG;
+
+ return flags;
+}
+
+static float appa_55ii_temp(const uint8_t *buf, int probe)
+{
+ const uint8_t *ptr = buf + 4 + 14 + 3*probe;
+ int16_t temp = RL16(ptr);
+ uint8_t flags = ptr[2];
+
+ if (flags & 0x60) return INFINITY;
+ else if (flags & 1) return (float)temp / 10;
+ else return (float)temp;
+}
+
+static void appa_55ii_live_data(struct sr_dev_inst *sdi, const uint8_t *buf)
+{
+ struct dev_context *devc = sdi->priv;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog = { 0 };
+ float values[APPA_55II_NUM_PROBES], *val_ptr = values;
+ int i;
+
+ if (devc->data_source != DATA_SOURCE_LIVE)
+ return;
+
+ analog.num_samples = 1;
+ analog.mq = SR_MQ_TEMPERATURE;
+ analog.unit = SR_UNIT_CELSIUS;
+ analog.mqflags = appa_55ii_flags(buf);
+ analog.data = values;
+
+ for (i=0; i<APPA_55II_NUM_PROBES; i++) {
+ struct sr_probe *probe = g_slist_nth_data(sdi->probes, i);
+ if (!probe->enabled)
+ continue;
+ analog.probes = g_slist_append(analog.probes, probe);
+ *val_ptr++ = appa_55ii_temp(buf, i);
+ }
+
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ sr_session_send(devc->session_cb_data, &packet);
+ g_slist_free(analog.probes);
+
+ devc->num_samples++;
+}
+
+static void appa_55ii_log_metadata(struct sr_dev_inst *sdi, const uint8_t *buf)
+{
+ struct dev_context *devc = sdi->priv;
+ devc->num_log_records = (buf[5] << 8) + buf[4];
+}
+
+static void appa_55ii_log_data_parse(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc = sdi->priv;
+ int offset = 0;
+
+ while (devc->log_buf_len >= 20 && devc->num_log_records > 0) {
+ const uint8_t *buf = devc->log_buf + offset;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog = { 0 };
+ float values[APPA_55II_NUM_PROBES], *val_ptr = values;
+ int i;
+
+ /* FIXME: timestamp should be sent in the packet */
+ sr_dbg("Timestamp: %02d:%02d:%02d", buf[2], buf[3], buf[4]);
+
+ analog.num_samples = 1;
+ analog.mq = SR_MQ_TEMPERATURE;
+ analog.unit = SR_UNIT_CELSIUS;
+ analog.data = values;
+
+ for (i=0; i<APPA_55II_NUM_PROBES; i++) {
+ int16_t temp = RL16(buf+12+2*i);
+ struct sr_probe *probe = g_slist_nth_data(sdi->probes, i);
+ if (!probe->enabled)
+ continue;
+ analog.probes = g_slist_append(analog.probes, probe);
+ *val_ptr++ = temp == 0x7FFF ? INFINITY : (float)temp / 10;
+ }
+
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ sr_session_send(devc->session_cb_data, &packet);
+ g_slist_free(analog.probes);
+
+ devc->num_samples++;
+ devc->log_buf_len -= 20;
+ offset += 20;
+ devc->num_log_records--;
+ }
+
+ memmove(devc->log_buf, devc->log_buf + offset, devc->log_buf_len);
+}
+
+static void appa_55ii_log_data(struct sr_dev_inst *sdi, const uint8_t *buf)
+{
+ struct dev_context *devc = sdi->priv;
+ const uint8_t *ptr = buf + 4;;
+ unsigned int size = buf[3];
+
+ if (devc->data_source != DATA_SOURCE_MEMORY)
+ return;
+
+ while (size > 0) {
+ int s = MIN(size, sizeof(devc->log_buf) - devc->log_buf_len);
+ memcpy(devc->log_buf + devc->log_buf_len, ptr, s);
+ devc->log_buf_len += s;
+ size -= s;
+ ptr += s;
+
+ appa_55ii_log_data_parse(sdi);
+ }
+}
+
+static void appa_55ii_log_end(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc = sdi->priv;
+
+ if (devc->data_source != DATA_SOURCE_MEMORY)
+ return;
+
+ sdi->driver->dev_acquisition_stop(sdi, devc->session_cb_data);
+}
+
+static const uint8_t *appa_55ii_parse_data(struct sr_dev_inst *sdi,
+ const uint8_t *buf, int len)
+{
+ if (len < 5)
+ return NULL; /* need more data */
+
+ if (buf[0] != 0x55 || buf[1] != 0x55)
+ return buf + 1; /* try to re-synchronize on a packet start */
+
+ if (len < 5+buf[3])
+ return NULL; /* need more data */
+
+ if (!appa_55ii_checksum(buf))
+ return buf + 4 + buf[3] + 1; /* skip broken packet */
+
+ switch ((PacketType) buf[2]) {
+ case LIVE_DATA: appa_55ii_live_data(sdi, buf); break;
+ case LOG_METADATA: appa_55ii_log_metadata(sdi, buf); break;
+ case LOG_DATA: appa_55ii_log_data(sdi, buf); break;
+ case LOG_START: break;
+ case LOG_END: appa_55ii_log_end(sdi); break;
+ }
+
+ return buf + 4 + buf[3] + 1;
+}
+