+
+static void send_data(const struct sr_dev_inst *sdi, void *buf, unsigned int buf_len)
+{
+ struct dev_context *devc;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog;
+
+ devc = sdi->priv;
+
+ memset(&analog, 0, sizeof(struct sr_datafeed_analog));
+ analog.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
+ analog.mqflags = devc->mqflags;
+ analog.unit = SR_UNIT_DECIBEL_SPL;
+ analog.channels = sdi->channels;
+ analog.num_samples = buf_len;
+ analog.data = buf;
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ sr_session_send(devc->cb_data, &packet);
+
+}
+
+SR_PRIV void kecheng_kc_330b_receive_transfer(struct libusb_transfer *transfer)
+{
+ struct dev_context *devc;
+ struct sr_dev_inst *sdi;
+ float fvalue[64];
+ int packet_has_error, num_samples, i;
+
+ sdi = transfer->user_data;
+ devc = sdi->priv;
+
+ packet_has_error = FALSE;
+ switch (transfer->status) {
+ case LIBUSB_TRANSFER_NO_DEVICE:
+ /* USB device was unplugged. */
+ sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
+ devc->cb_data);
+ return;
+ case LIBUSB_TRANSFER_COMPLETED:
+ case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though */
+ break;
+ default:
+ packet_has_error = TRUE;
+ break;
+ }
+
+ if (packet_has_error)
+ return;
+
+ if (devc->state == LIVE_SPL_WAIT) {
+ if (transfer->actual_length != 3 || transfer->buffer[0] != 0x88) {
+ sr_dbg("Received invalid SPL packet.");
+ } else {
+ fvalue[0] = ((transfer->buffer[1] << 8) + transfer->buffer[2]) / 10.0;
+ send_data(sdi, fvalue, 1);
+ devc->num_samples++;
+ if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
+ sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
+ devc->cb_data);
+ } else {
+ /* let USB event handler fire off another
+ * request when the time is right. */
+ devc->state = LIVE_SPL_IDLE;
+ }
+ }
+ } else if (devc->state == LOG_DATA_WAIT) {
+ if (transfer->actual_length < 1 || !(transfer->actual_length & 0x01)) {
+ sr_dbg("Received invalid stored SPL packet.");
+ } else {
+ num_samples = (transfer->actual_length - 1) / 2;
+ for (i = 0; i < num_samples; i++) {
+ fvalue[i] = transfer->buffer[1 + i * 2] << 8;
+ fvalue[i] += transfer->buffer[1 + i * 2 + 1];
+ fvalue[i] /= 10.0;
+ }
+ send_data(sdi, fvalue, 1);
+ devc->num_samples += num_samples;
+ if (devc->num_samples >= devc->stored_samples) {
+ sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
+ devc->cb_data);
+ } else {
+ /* let USB event handler fire off another
+ * request when the time is right. */
+ devc->state = LOG_DATA_IDLE;
+ }
+ }
+ }
+
+}
+
+SR_PRIV int kecheng_kc_330b_configure(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ struct sr_usb_dev_inst *usb;
+ int len, ret;
+ unsigned char buf[7];
+
+ sr_dbg("Configuring device.");
+
+ usb = sdi->conn;
+ devc = sdi->priv;
+
+ buf[0] = CMD_CONFIGURE;
+ buf[1] = devc->sample_interval;
+ buf[2] = devc->alarm_low;
+ buf[3] = devc->alarm_high;
+ buf[4] = devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F ? 0 : 1;
+ buf[5] = devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A ? 0 : 1;
+ buf[6] = devc->data_source;
+ ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
+ if (ret != 0 || len != 7) {
+ sr_dbg("Failed to configure device: %s", libusb_error_name(ret));
+ return SR_ERR;
+ }
+
+ /* The configure command ack takes about 32ms to come in. */
+ ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 40);
+ if (ret != 0 || len != 1) {
+ sr_dbg("Failed to configure device (no ack): %s", libusb_error_name(ret));
+ return SR_ERR;
+ }
+ if (buf[0] != (CMD_CONFIGURE | 0x80)) {
+ sr_dbg("Failed to configure device: invalid response 0x%2.x", buf[0]);
+ return SR_ERR;
+ }
+
+ devc->config_dirty = FALSE;
+
+ return SR_OK;
+}
+
+SR_PRIV int kecheng_kc_330b_set_date_time(struct sr_dev_inst *sdi)
+{
+ struct sr_usb_dev_inst *usb;
+ GDateTime *dt;
+ int len, ret;
+ unsigned char buf[7];
+
+ sr_dbg("Setting device date/time.");
+
+ usb = sdi->conn;
+
+ dt = g_date_time_new_now_local();
+ buf[0] = CMD_SET_DATE_TIME;
+ buf[1] = g_date_time_get_year(dt) - 2000;
+ buf[2] = g_date_time_get_month(dt);
+ buf[3] = g_date_time_get_day_of_month(dt);
+ buf[4] = g_date_time_get_hour(dt);
+ buf[5] = g_date_time_get_minute(dt);
+ buf[6] = g_date_time_get_second(dt);
+ g_date_time_unref(dt);
+ ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 7, &len, 5);
+ if (ret != 0 || len != 7) {
+ sr_dbg("Failed to set date/time: %s", libusb_error_name(ret));
+ return SR_ERR;
+ }
+
+ ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 1, &len, 10);
+ if (ret != 0 || len != 1) {
+ sr_dbg("Failed to set date/time (no ack): %s", libusb_error_name(ret));
+ return SR_ERR;
+ }
+ if (buf[0] != (CMD_SET_DATE_TIME | 0x80)) {
+ sr_dbg("Failed to set date/time: invalid response 0x%2.x", buf[0]);
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}
+
+SR_PRIV int kecheng_kc_330b_status_get(const struct sr_dev_inst *sdi,
+ int *status)
+{
+ struct sr_usb_dev_inst *usb;
+ int len, ret;
+ unsigned char buf;
+
+ sr_dbg("Getting device status.");
+
+ usb = sdi->conn;
+ buf = CMD_GET_STATUS;
+ ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &buf, 1, &len, 5);
+ if (ret != 0 || len != 1) {
+ sr_dbg("Failed to get status: %s", libusb_error_name(ret));
+ return SR_ERR;
+ }
+
+ ret = libusb_bulk_transfer(usb->devhdl, EP_IN, &buf, 1, &len, 10);
+ if (ret != 0 || len != 1) {
+ sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
+ return SR_ERR;
+ }
+ /* Need either 0x84 or 0xa4. */
+ if (buf != (CMD_GET_STATUS | 0x80) && buf != (CMD_GET_STATUS | 0xa0)) {
+ sr_dbg("Failed to get status: invalid response 0x%2.x", buf);
+ return SR_ERR;
+ }
+
+ if (buf & 0x20)
+ *status = DEVICE_INACTIVE;
+ else
+ *status = DEVICE_ACTIVE;
+
+ return SR_OK;
+}
+
+SR_PRIV int kecheng_kc_330b_log_info_get(const struct sr_dev_inst *sdi,
+ unsigned char *buf)
+{
+ struct sr_usb_dev_inst *usb;
+ int len, ret;
+
+ sr_dbg("Getting logging info.");
+
+ usb = sdi->conn;
+ buf[0] = CMD_GET_LOG_INFO;
+ ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5);
+ if (ret != 0 || len != 1) {
+ sr_dbg("Failed to get status: %s", libusb_error_name(ret));
+ return SR_ERR;
+ }
+
+ ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 9, &len, 10);
+ if (ret != 0 || len != 9) {
+ sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret));
+ return SR_ERR;
+ }
+ if (buf[0] != (CMD_GET_LOG_INFO | 0x80) || buf[1] > 6) {
+ sr_dbg("Failed to get log info: invalid response 0x%2.x", buf[0]);
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}