SR_PRIV int usb_source_remove(struct sr_context *ctx)
{
if (!ctx->usb_source_present)
return SR_OK;
#ifdef _WIN32
ctx->usb_thread_running = FALSE;
g_mutex_unlock(&ctx->usb_mutex);
libusb_unlock_events(ctx->libusb_ctx);
g_thread_join(ctx->usb_thread);
g_mutex_clear(&ctx->usb_mutex);
sr_session_source_remove_pollfd(&ctx->usb_pollfd);
CloseHandle(ctx->usb_event);
#else
const struct libusb_pollfd **lupfd;
unsigned int i;
lupfd = libusb_get_pollfds(ctx->libusb_ctx);
for (i = 0; lupfd[i]; i++)
sr_source_remove(lupfd[i]->fd);
free(lupfd);
#endif
ctx->usb_source_present = FALSE;
return SR_OK;
}
SR_PRIV int scpi_usbtmc_source_remove(void *priv)
{
struct usbtmc_scpi *uscpi = priv;
struct sr_usbtmc_dev_inst *usbtmc = uscpi->usbtmc;
return sr_source_remove(usbtmc->fd);
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
struct sr_datafeed_packet packet;
(void)sdi;
sr_dbg("Stopping acquisition.");
sr_source_remove(-1);
/* Send end packet to the session bus. */
sr_dbg("Sending SR_DF_END.");
packet.type = SR_DF_END;
sr_session_send(cb_data, &packet);
return SR_OK;
}
static void finish_acquisition(struct dev_context *devc)
{
struct sr_datafeed_packet packet;
int i;
/* Terminate session. */
packet.type = SR_DF_END;
sr_session_send(devc->cb_data, &packet);
/* Remove fds from polling. */
for (i = 0; devc->usbfd[i] != -1; i++)
sr_source_remove(devc->usbfd[i]);
g_free(devc->usbfd);
devc->num_transfers = 0;
g_free(devc->transfers);
}
/*
* Standard sr_session_stop() API helper.
*
* This function can be used to simplify most (serial port based) driver's
* dev_acquisition_stop() API callback.
*
* @param sdi The device instance for which acquisition should stop.
* Must not be NULL.
* @param cb_data Opaque 'cb_data' pointer. Must not be NULL.
* @param dev_close_fn Function pointer to the driver's dev_close().
* Must not be NULL.
* @param serial The serial device instance (struct serial_dev_inst *).
* Must not be NULL.
* @param prefix A driver-specific prefix string used for log messages.
* Must not be NULL. An empty string is allowed.
*
* @retval SR_OK Success.
* @retval SR_ERR_ARG Invalid arguments.
* @retval SR_ERR_DEV_CLOSED Device is closed.
* @retval SR_ERR Other errors.
*/
SR_PRIV int std_dev_acquisition_stop_serial(struct sr_dev_inst *sdi,
void *cb_data, dev_close_t dev_close_fn,
struct sr_serial_dev_inst *serial, const char *prefix)
{
int ret;
struct sr_datafeed_packet packet;
if (!prefix) {
sr_err("Invalid prefix.");
return SR_ERR_ARG;
}
if (sdi->status != SR_ST_ACTIVE) {
sr_err("%sDevice inactive, can't stop acquisition.", prefix);
return SR_ERR_DEV_CLOSED;
}
sr_dbg("%sStopping acquisition.", prefix);
if ((ret = sr_source_remove(serial->fd)) < 0) {
sr_err("%sFailed to remove source: %d.", prefix, ret);
return ret;
}
if ((ret = dev_close_fn(sdi)) < 0) {
sr_err("%sFailed to close device: %d.", prefix, ret);
return ret;
}
/* Send SR_DF_END packet to the session bus. */
sr_dbg("%sSending SR_DF_END packet.", prefix);
packet.type = SR_DF_END;
packet.payload = NULL;
if ((ret = sr_session_send(cb_data, &packet)) < 0) {
sr_err("%sFailed to send SR_DF_END packet: %d.", prefix, ret);
return ret;
}
return SR_OK;
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
struct dev_context *devc;
struct sr_serial_dev_inst *serial;
(void)cb_data;
devc = sdi->priv;
if (sdi->status != SR_ST_ACTIVE) {
sr_err("Device inactive, can't stop acquisition.");
return SR_ERR;
}
g_slist_free(devc->enabled_analog_probes);
g_slist_free(devc->enabled_digital_probes);
devc->enabled_analog_probes = NULL;
devc->enabled_digital_probes = NULL;
serial = sdi->conn;
sr_source_remove(serial->fd);
return SR_OK;
}
static int handle_event(int fd, int revents, void *cb_data)
{
const struct sr_dev_inst *sdi;
struct sr_datafeed_packet packet;
struct timeval tv;
struct dev_context *devc;
struct drv_context *drvc = di->priv;
const struct libusb_pollfd **lupfd;
int num_probes, i;
uint32_t trigger_offset;
uint8_t capturestate;
(void)fd;
(void)revents;
sdi = cb_data;
devc = sdi->priv;
if (devc->dev_state == STOPPING) {
/* We've been told to wind up the acquisition. */
sr_dbg("Stopping acquisition.");
/*
* TODO: Doesn't really cancel pending transfers so they might
* come in after SR_DF_END is sent.
*/
lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
for (i = 0; lupfd[i]; i++)
sr_source_remove(lupfd[i]->fd);
free(lupfd);
packet.type = SR_DF_END;
sr_session_send(sdi, &packet);
devc->dev_state = IDLE;
return TRUE;
}
/* Always handle pending libusb events. */
tv.tv_sec = tv.tv_usec = 0;
libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
/* TODO: ugh */
if (devc->dev_state == NEW_CAPTURE) {
if (dso_capture_start(devc) != SR_OK)
return TRUE;
if (dso_enable_trigger(devc) != SR_OK)
return TRUE;
// if (dso_force_trigger(devc) != SR_OK)
// return TRUE;
sr_dbg("Successfully requested next chunk.");
devc->dev_state = CAPTURE;
return TRUE;
}
if (devc->dev_state != CAPTURE)
return TRUE;
if ((dso_get_capturestate(devc, &capturestate, &trigger_offset)) != SR_OK)
return TRUE;
sr_dbg("Capturestate %d.", capturestate);
sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
switch (capturestate) {
case CAPTURE_EMPTY:
if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
devc->capture_empty_count = 0;
if (dso_capture_start(devc) != SR_OK)
break;
if (dso_enable_trigger(devc) != SR_OK)
break;
// if (dso_force_trigger(devc) != SR_OK)
// break;
sr_dbg("Successfully requested next chunk.");
}
break;
case CAPTURE_FILLING:
/* No data yet. */
break;
case CAPTURE_READY_8BIT:
/* Remember where in the captured frame the trigger is. */
devc->trigger_offset = trigger_offset;
num_probes = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
/* TODO: Check malloc return value. */
devc->framebuf = g_try_malloc(devc->framesize * num_probes * 2);
devc->samp_buffered = devc->samp_received = 0;
/* Tell the scope to send us the first frame. */
if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
break;
/*
* Don't hit the state machine again until we're done fetching
* the data we just told the scope to send.
*/
devc->dev_state = FETCH_DATA;
/* Tell the frontend a new frame is on the way. */
packet.type = SR_DF_FRAME_BEGIN;
sr_session_send(sdi, &packet);
break;
case CAPTURE_READY_9BIT:
/* TODO */
sr_err("Not yet supported.");
break;
case CAPTURE_TIMEOUT:
/* Doesn't matter, we'll try again next time. */
break;
default:
sr_dbg("Unknown capture state: %d.", capturestate);
break;
}
return TRUE;
}
static int scpi_vxi_source_remove(void *priv)
{
(void)priv;
return sr_source_remove(-1);
}
