The code supports single shot capturing data and transferring that
to the PC. Sample memory depth is for now fixed at 14K/7K samples.
---
hardware/rigol-ds/api.c | 33 ++++-
hardware/rigol-ds/protocol.c | 337 ++++++++++++++++++++++++++++++++----------
hardware/rigol-ds/protocol.h | 23 ++-
3 files changed, 303 insertions(+), 90 deletions(-)
diff --git a/hardware/rigol-ds/api.c b/hardware/rigol-ds/api.c
index 37dc9d0..20f970c 100644
--- a/hardware/rigol-ds/api.c
+++ b/hardware/rigol-ds/api.c
@@ -647,8 +647,16 @@ static int dev_acquisition_start(const struct sr_dev_inst
*sdi, void *cb_data)
serial = sdi->conn;
devc = sdi->priv;
- if (devc->data_source != DATA_SOURCE_LIVE) {
- sr_err("Only data source Live supported for now");
+ if (devc->data_source == DATA_SOURCE_LIVE) {
+ if (rigol_ds_send(sdi, ":RUN") != SR_OK)
+ return SR_ERR;
+ } else if (devc->data_source == DATA_SOURCE_MEMORY) {
+ if (devc->model->series != RIGOL_DS2000) {
+ sr_err("Data source 'Memory' not supported for this
device");
+ return SR_ERR;
+ }
+ } else if (devc->data_source == DATA_SOURCE_SEGMENTED) {
+ sr_err("Data source 'Segmented' not yet supported");
return SR_ERR;
}
@@ -690,6 +698,7 @@ static int dev_acquisition_start(const struct sr_dev_inst
*sdi, void *cb_data)
if (devc->model->protocol == PROTOCOL_LEGACY) {
/* Fetch the first frame. */
if (devc->enabled_analog_probes) {
+ devc->analog_frame_size =
DS1000_ANALOG_LIVE_WAVEFORM_SIZE;
devc->channel_frame = devc->enabled_analog_probes->data;
if (rigol_ds_send(sdi, ":WAV:DATA? CHAN%d",
devc->channel_frame->index + 1) !=
SR_OK)
@@ -703,9 +712,25 @@ static int dev_acquisition_start(const struct sr_dev_inst
*sdi, void *cb_data)
devc->num_frame_bytes = 0;
} else {
if (devc->enabled_analog_probes) {
+ if (devc->data_source == DATA_SOURCE_MEMORY)
+ {
+ if (g_slist_length(devc->enabled_analog_probes)
== 1)
+ devc->analog_frame_size =
DS2000_ANALOG_MEM_WAVEFORM_SIZE_1C;
+ else
+ devc->analog_frame_size =
DS2000_ANALOG_MEM_WAVEFORM_SIZE_2C;
+ /* Apparently for the DS2000 the memory
+ * depth can only be set in Running state -
+ * this matches the behaviour of the UI. */
+ if (rigol_ds_send(sdi, ":RUN") != SR_OK)
+ return SR_ERR;
+ if (rigol_ds_send(sdi, "ACQ:MDEP %d",
devc->analog_frame_size) != SR_OK)
+ return SR_ERR;
+ if (rigol_ds_send(sdi, ":STOP") != SR_OK)
+ return SR_ERR;
+ } else
+ devc->analog_frame_size =
DS2000_ANALOG_LIVE_WAVEFORM_SIZE;
devc->channel_frame = devc->enabled_analog_probes->data;
- /* Assume there already was a trigger event - don't
wait */
- if (rigol_ds_acquisition_start(sdi, FALSE) != SR_OK)
+ if (rigol_ds_capture_start(sdi) != SR_OK)
return SR_ERR;
}
}
diff --git a/hardware/rigol-ds/protocol.c b/hardware/rigol-ds/protocol.c
index 912c2e9..f0101e7 100644
--- a/hardware/rigol-ds/protocol.c
+++ b/hardware/rigol-ds/protocol.c
@@ -91,41 +91,29 @@ static int parse_int(const char *str, int *ret)
return SR_OK;
}
+/* Set the next event to wait for in rigol_ds_receive */
+static void rigol_ds_set_wait_event(struct dev_context *devc, enum wait_events
event)
+{
+ if (event == WAIT_STOP)
+ devc->wait_status = 2;
+ else
+ devc->wait_status = 1;
+ devc->wait_event = event;
+}
+
/*
- * Waiting for a trigger event will return a timeout after 2, 3 seconds in
- * order to not block the application.
+ * Waiting for a event will return a timeout after 2 to 3 seconds in order
+ * to not block the application.
*/
-
-static int rigol_ds_trigger_wait(const struct sr_dev_inst *sdi)
+static int rigol_ds_event_wait(const struct sr_dev_inst *sdi, char status1,
char status2)
{
char buf[20];
struct dev_context *devc;
time_t start;
- long s;
if (!(devc = sdi->priv))
return SR_ERR;
- /*
- * If timebase < 50 msecs/DIV just sleep about one sweep time except
- * for really fast sweeps.
- */
- if (devc->trigger_wait_status == 1 && devc->timebase < 0.0499)
- {
- if (devc->timebase > 0.99e-6) {
- /*
- * Timebase * num hor. divs * 85(%) * 1e6(usecs) / 100
- * -> 85 percent of sweep time
- */
- s = (devc->timebase * devc->model->num_horizontal_divs
- * 85e6) / 100L;
- sr_spew("Sleeping for %ld usecs instead of
trigger-wait", s);
- g_usleep(s);
- }
- devc->trigger_wait_status = 0;
- return SR_OK;
- }
-
start = time(NULL);
/*
@@ -137,7 +125,7 @@ static int rigol_ds_trigger_wait(const struct sr_dev_inst
*sdi)
* "STOP" - stopped
*/
- if (devc->trigger_wait_status == 1) {
+ if (devc->wait_status == 1) {
do {
if (time(NULL) - start >= 3) {
sr_dbg("Timeout waiting for trigger");
@@ -146,11 +134,11 @@ static int rigol_ds_trigger_wait(const struct sr_dev_inst
*sdi)
if (get_cfg(sdi, ":TRIG:STAT?", buf, sizeof(buf)) !=
SR_OK)
return SR_ERR;
- } while (buf[0] == 'T' || buf[0] == 'A');
+ } while (buf[0] == status1 || buf[0] == status2);
- devc->trigger_wait_status = 2;
+ devc->wait_status = 2;
}
- if (devc->trigger_wait_status == 2) {
+ if (devc->wait_status == 2) {
do {
if (time(NULL) - start >= 3) {
sr_dbg("Timeout waiting for trigger");
@@ -159,20 +147,20 @@ static int rigol_ds_trigger_wait(const struct sr_dev_inst
*sdi)
if (get_cfg(sdi, ":TRIG:STAT?", buf, sizeof(buf)) !=
SR_OK)
return SR_ERR;
- } while (buf[0] != 'T' && buf[0] != 'A');
+ } while (buf[0] != status1 && buf[0] != status2);
- devc->trigger_wait_status = 0;
+ rigol_ds_set_wait_event(devc, WAIT_NONE);
}
return SR_OK;
}
/*
- * This needs to wait for a new trigger event to ensure that sample data is
- * not returned twice.
+ * For live capture we need to wait for a new trigger event to ensure that
+ * sample data is not returned twice.
*
* Unfortunately this will never really work because for sufficiently fast
- * timebases it just can't catch the status changes.
+ * timebases and trigger rates it just can't catch the status changes.
*
* What would be needed is a trigger event register with autoreset like the
* Agilents have. The Rigols don't seem to have anything like this.
@@ -180,41 +168,184 @@ static int rigol_ds_trigger_wait(const struct
sr_dev_inst *sdi)
* The workaround is to only wait for the trigger when the timebase is slow
* enough. Of course this means that for faster timebases sample data can be
* returned multiple times, this effect is mitigated somewhat by sleeping
- * for about one sweep time.
+ * for about one sweep time in that case.
*/
-
-SR_PRIV int rigol_ds_acquisition_start(const struct sr_dev_inst *sdi,
- gboolean wait_for_trigger)
+static int rigol_ds_trigger_wait(const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
+ long s;
if (!(devc = sdi->priv))
return SR_ERR;
- sr_dbg("Starting acquisition on channel %d",
- devc->channel_frame->index + 1);
+ /*
+ * If timebase < 50 msecs/DIV just sleep about one sweep time except
+ * for really fast sweeps.
+ */
+ if (devc->timebase < 0.0499)
+ {
+ if (devc->timebase > 0.99e-6) {
+ /*
+ * Timebase * num hor. divs * 85(%) * 1e6(usecs) / 100
+ * -> 85 percent of sweep time
+ */
+ s = (devc->timebase * devc->model->num_horizontal_divs
+ * 85e6) / 100L;
+ sr_spew("Sleeping for %ld usecs instead of
trigger-wait", s);
+ g_usleep(s);
+ }
+ rigol_ds_set_wait_event(devc, WAIT_NONE);
+ return SR_OK;
+ } else {
+ return rigol_ds_event_wait(sdi, 'T', 'A');
+ }
+}
- if (rigol_ds_send(sdi, ":WAV:FORM BYTE") != SR_OK)
+/* Wait for scope to got to "Stop" in single shot mode */
+static int rigol_ds_stop_wait(const struct sr_dev_inst *sdi)
+{
+ return rigol_ds_event_wait(sdi, 'S', 'S');
+}
+
+/* Check that a single shot acquisition actually succeeded on the DS2000 */
+static int rigol_ds_check_stop(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ int tmp;
+
+ if (!(devc = sdi->priv))
return SR_ERR;
+
if (rigol_ds_send(sdi, ":WAV:SOUR CHAN%d",
- devc->channel_frame->index + 1) != SR_OK)
+ devc->channel_frame->index + 1) != SR_OK)
return SR_ERR;
- if (rigol_ds_send(sdi, ":WAV:MODE NORM") != SR_OK)
+ /* Check that the number of samples will be accepted */
+ if (rigol_ds_send(sdi, ":WAV:POIN %d;*OPC", devc->analog_frame_size) !=
SR_OK)
return SR_ERR;
+ if (get_cfg_int(sdi, "*ESR?", &tmp) != SR_OK)
+ return SR_ERR;
+ /*
+ * If we get an "Execution error" the scope went from "Single" to
+ * "Stop" without actually triggering. There is no waveform
+ * displayed and trying to download one will fail - the scope thinks
+ * it has 1400 samples (like display memory) and the driver thinks
+ * it has a different number of samples.
+ *
+ * In that case just try to capture something again. Might still
+ * fail in interesting ways.
+ *
+ * Ain't firmware fun?
+ */
+ if (tmp & 0x10) {
+ sr_warn("Single shot acquisition failed, retrying...");
+ /* Sleep a bit, otherwise the single shot will often fail */
+ g_usleep(500000);
+ rigol_ds_send(sdi, ":SING");
+ rigol_ds_set_wait_event(devc, WAIT_STOP);
+ return SR_ERR;
+ }
- devc->num_frame_bytes = 0;
- devc->num_block_bytes = 0;
+ return SR_OK;
+}
- if (wait_for_trigger)
- {
- devc->trigger_wait_status = 1;
+/* Wait for enough data becoming available in scope output buffer */
+static int rigol_ds_block_wait(const struct sr_dev_inst *sdi)
+{
+ char buf[30];
+ struct dev_context *devc;
+ time_t start;
+ int len;
+
+ if (!(devc = sdi->priv))
+ return SR_ERR;
+
+ start = time(NULL);
+
+ do {
+ if (time(NULL) - start >= 3) {
+ sr_dbg("Timeout waiting for data block");
+ return SR_ERR_TIMEOUT;
+ }
+
+ /*
+ * The scope copies data really slowly from sample
+ * memory to its output buffer, so try not to bother
+ * it too much with SCPI requests but don't wait too
+ * long for short sample frame sizes.
+ */
+ g_usleep(devc->analog_frame_size < 15000 ? 100000 : 1000000);
+
+ /* "READ,nnnn" (still working) or "IDLE,nnnn" (finished) */
+ if (get_cfg(sdi, ":WAV:STAT?", buf, sizeof(buf)) != SR_OK)
+ return SR_ERR;
+
+ if (parse_int(buf + 5, &len) != SR_OK)
+ return SR_ERR;
+ } while (buf[0] == 'R' && len < 1000000);
+
+ rigol_ds_set_wait_event(devc, WAIT_NONE);
+
+ return SR_OK;
+}
+
+/* Start capturing a new frameset */
+SR_PRIV int rigol_ds_capture_start(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+
+ if (!(devc = sdi->priv))
+ return SR_ERR;
+
+ sr_dbg("Starting data capture for frameset %lu of %lu",
+ devc->num_frames + 1, devc->limit_frames);
+
+ if (rigol_ds_send(sdi, ":WAV:FORM BYTE") != SR_OK)
+ return SR_ERR;
+ if (devc->data_source == DATA_SOURCE_LIVE) {
+ if (rigol_ds_send(sdi, ":WAV:MODE NORM") != SR_OK)
+ return SR_ERR;
+ rigol_ds_set_wait_event(devc, WAIT_TRIGGER);
} else {
- devc->trigger_wait_status = 0;
+ if (rigol_ds_send(sdi, ":WAV:MODE RAW") != SR_OK)
+ return SR_ERR;
+ if (rigol_ds_send(sdi, ":SING", devc->analog_frame_size) !=
SR_OK)
+ return SR_ERR;
+ rigol_ds_set_wait_event(devc, WAIT_STOP);
}
return SR_OK;
}
+/* Start reading data from the current channel */
+SR_PRIV int rigol_ds_channel_start(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+
+ if (!(devc = sdi->priv))
+ return SR_ERR;
+
+ sr_dbg("Starting reading data from channel %d",
+ devc->channel_frame->index + 1);
+
+ if (rigol_ds_send(sdi, ":WAV:SOUR CHAN%d",
+ devc->channel_frame->index + 1) != SR_OK)
+ return SR_ERR;
+ if (devc->data_source != DATA_SOURCE_LIVE) {
+ if (rigol_ds_send(sdi, ":WAV:RES") != SR_OK)
+ return SR_ERR;
+ if (rigol_ds_send(sdi, ":WAV:BEG") != SR_OK)
+ return SR_ERR;
+ rigol_ds_set_wait_event(devc, WAIT_BLOCK);
+ } else
+ rigol_ds_set_wait_event(devc, WAIT_NONE);
+
+ devc->num_frame_bytes = 0;
+ devc->num_block_bytes = 0;
+
+ return SR_OK;
+}
+
+/* Read the header of a data block */
static int rigol_ds_read_header(struct sr_serial_dev_inst *serial)
{
char start[3], length[10];
@@ -277,41 +408,68 @@ SR_PRIV int rigol_ds_receive(int fd, int revents, void
*cb_data)
serial = sdi->conn;
if (revents == G_IO_IN) {
- if (devc->trigger_wait_status > 0) {
- if (rigol_ds_trigger_wait(sdi) != SR_OK)
- return TRUE;
- }
+ if (devc->model->protocol == PROTOCOL_IEEE488_2) {
+ switch(devc->wait_event) {
+ case WAIT_NONE:
+ break;
- if (devc->model->protocol == PROTOCOL_IEEE488_2
- && devc->num_block_bytes == 0) {
- sr_dbg("New block header expected");
- if (rigol_ds_send(sdi, ":WAV:DATA?") != SR_OK)
- return TRUE;
- len = rigol_ds_read_header(serial);
- if (len == -1)
- return TRUE;
- /* At slow timebases the DS2072 sometimes returns
- * "short" data blocks, with apparently no way to
- * get the rest of the data. Discard these, the
- * complete data block will appear eventually.
- */
- if (len < DS2000_ANALOG_WAVEFORM_SIZE) {
- sr_dbg("Discarding short data block");
- serial_read(serial, devc->buffer, len + 1);
+ case WAIT_TRIGGER:
+ if (rigol_ds_trigger_wait(sdi) != SR_OK)
+ return TRUE;
+ if (rigol_ds_channel_start(sdi) != SR_OK)
+ return TRUE;
+ break;
+
+ case WAIT_BLOCK:
+ if (rigol_ds_block_wait(sdi) != SR_OK)
+ return TRUE;
+ break;
+
+ case WAIT_STOP:
+ if (rigol_ds_stop_wait(sdi) != SR_OK)
+ return TRUE;
+ if (rigol_ds_check_stop(sdi) != SR_OK)
+ return TRUE;
+ if (rigol_ds_channel_start(sdi) != SR_OK)
+ return TRUE;
return TRUE;
+
+ default:
+ sr_err("BUG: Unknown event target encountered");
+ }
+
+ if (devc->num_block_bytes == 0) {
+ sr_dbg("New block header expected");
+ if (rigol_ds_send(sdi, ":WAV:DATA?") != SR_OK)
+ return TRUE;
+ len = rigol_ds_read_header(serial);
+ if (len == -1)
+ return TRUE;
+ /* At slow timebases in live capture the DS2072
+ * sometimes returns "short" data blocks, with
+ * apparently no way to get the rest of the
data.
+ * Discard these, the complete data block will
+ * appear eventually.
+ */
+ if (devc->data_source == DATA_SOURCE_LIVE
+ && (unsigned)len < devc->num_frame_bytes) {
+ sr_dbg("Discarding short data block");
+ serial_read(serial, devc->buffer, len +
1);
+ return TRUE;
+ }
+ devc->num_block_bytes = len;
+ devc->num_block_read = 0;
}
- devc->num_block_bytes = len;
- devc->num_block_read = 0;
}
probe = devc->channel_frame;
if (devc->model->protocol == PROTOCOL_IEEE488_2) {
len = devc->num_block_bytes - devc->num_block_read;
len = serial_read(serial, devc->buffer,
- len < DS2000_ANALOG_WAVEFORM_SIZE ? len
: DS2000_ANALOG_WAVEFORM_SIZE);
+ len < ACQ_BUFFER_SIZE ? len :
ACQ_BUFFER_SIZE);
} else {
waveform_size = probe->type == SR_PROBE_ANALOG ?
- DS1000_ANALOG_WAVEFORM_SIZE :
DIGITAL_WAVEFORM_SIZE;
+ DS1000_ANALOG_LIVE_WAVEFORM_SIZE :
DIGITAL_WAVEFORM_SIZE;
len = serial_read(serial, devc->buffer, waveform_size -
devc->num_frame_bytes);
}
sr_dbg("Received %d bytes.", len);
@@ -348,15 +506,26 @@ SR_PRIV int rigol_ds_receive(int fd, int revents, void
*cb_data)
g_slist_free(analog.probes);
if (devc->model->protocol == PROTOCOL_IEEE488_2) {
+ if (devc->num_block_read ==
devc->num_block_bytes) {
+ sr_dbg("Block has been completed");
+ /* Discard the terminating linefeed and
prepare for
+ possible next block */
+ serial_read(serial, devc->buffer, 1);
+ devc->num_block_bytes = 0;
+ if (devc->data_source !=
DATA_SOURCE_LIVE)
+ rigol_ds_set_wait_event(devc,
WAIT_BLOCK);
+ } else
+ sr_dbg("%d of %d block bytes read",
devc->num_block_read, devc->num_block_bytes);
+
devc->num_frame_bytes += len;
- if (devc->num_frame_bytes <
DS2000_ANALOG_WAVEFORM_SIZE)
+ if (devc->num_frame_bytes <
devc->analog_frame_size)
/* Don't have the whole frame yet. */
return TRUE;
sr_dbg("Frame completed, %d samples",
devc->num_frame_bytes);
} else {
- if (len != DS1000_ANALOG_WAVEFORM_SIZE)
+ if (len != DS1000_ANALOG_LIVE_WAVEFORM_SIZE)
/* Don't have the whole frame yet. */
return TRUE;
}
@@ -378,6 +547,16 @@ SR_PRIV int rigol_ds_receive(int fd, int revents, void
*cb_data)
sr_session_send(sdi, &packet);
if (devc->model->protocol == PROTOCOL_LEGACY)
devc->num_frame_bytes = 0;
+ else {
+ /* Signal end of data download to scope */
+ if (devc->data_source != DATA_SOURCE_LIVE)
+ /*
+ * This causes a query error, without it
switching
+ * to the next channel causes an error. Fun with
+ * firmware...
+ */
+ rigol_ds_send(sdi, ":WAV:END");
+ }
if (devc->enabled_analog_probes
&& devc->channel_frame ==
devc->enabled_analog_probes->data
@@ -386,8 +565,7 @@ SR_PRIV int rigol_ds_receive(int fd, int revents, void
*cb_data)
* there's a second analog channel. */
devc->channel_frame =
devc->enabled_analog_probes->next->data;
if (devc->model->protocol == PROTOCOL_IEEE488_2) {
- /* Do not wait for trigger to try and keep
channel data related. */
- rigol_ds_acquisition_start(sdi, FALSE);
+ rigol_ds_channel_start(sdi);
} else {
rigol_ds_send(sdi, ":WAV:DATA? CHAN%c",
devc->channel_frame->name[2]);
@@ -407,10 +585,7 @@ SR_PRIV int rigol_ds_receive(int fd, int revents, void
*cb_data)
if (devc->model->protocol ==
PROTOCOL_IEEE488_2) {
if (devc->enabled_analog_probes) {
devc->channel_frame =
devc->enabled_analog_probes->data;
- /* Must wait for trigger
because at
- * slow timebases the scope will
- * return old data otherwise. */
- rigol_ds_acquisition_start(sdi,
TRUE);
+ rigol_ds_capture_start(sdi);
}
} else {
if (devc->enabled_analog_probes) {
diff --git a/hardware/rigol-ds/protocol.h b/hardware/rigol-ds/protocol.h
index 09e29ad..db12543 100644
--- a/hardware/rigol-ds/protocol.h
+++ b/hardware/rigol-ds/protocol.h
@@ -35,8 +35,11 @@
#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
-#define DS1000_ANALOG_WAVEFORM_SIZE 600
-#define DS2000_ANALOG_WAVEFORM_SIZE 1400
+#define DS1000_ANALOG_LIVE_WAVEFORM_SIZE 600
+#define DS2000_ANALOG_LIVE_WAVEFORM_SIZE 1400
+/* Needs to be made configurable later */
+#define DS2000_ANALOG_MEM_WAVEFORM_SIZE_1C 14000
+#define DS2000_ANALOG_MEM_WAVEFORM_SIZE_2C 7000
#define DIGITAL_WAVEFORM_SIZE 1210
/* Size of acquisition buffers */
#define ACQ_BUFFER_SIZE 32768
@@ -73,6 +76,13 @@ struct rigol_ds_model {
int num_horizontal_divs;
};
+enum wait_events {
+ WAIT_NONE, /* Don't wait */
+ WAIT_TRIGGER, /* Wait for trigger (only live capture) */
+ WAIT_BLOCK, /* Wait for block data (only when reading sample mem) */
+ WAIT_STOP, /* Wait for scope stopping (only single shots) */
+};
+
/** Private, per-device-instance driver context. */
struct dev_context {
/* Device model */
@@ -90,6 +100,7 @@ struct dev_context {
uint64_t limit_frames;
void *cb_data;
enum data_source data_source;
+ uint64_t analog_frame_size;
/* Device settings */
gboolean analog_channels[2];
@@ -112,14 +123,16 @@ struct dev_context {
uint64_t num_block_bytes;
/* Number of data block bytes already read */
uint64_t num_block_read;
- /* Trigger waiting status, 0 - don't wait */
- int trigger_wait_status;
+ /* What to wait for in *_receive */
+ enum wait_events wait_event;
+ /* Trigger/block copying/stop waiting status */
+ int wait_status;
/* Acq buffers used for reading from the scope and sending data to app
*/
unsigned char *buffer;
float *data;
};
-SR_PRIV int rigol_ds_acquisition_start(const struct sr_dev_inst *sdi, gboolean
wait_for_trigger);
+SR_PRIV int rigol_ds_capture_start(const struct sr_dev_inst *sdi);
SR_PRIV int rigol_ds_receive(int fd, int revents, void *cb_data);
SR_PRIV int rigol_ds_send(const struct sr_dev_inst *sdi, const char *format,
...);
SR_PRIV int rigol_ds_get_dev_cfg(const struct sr_dev_inst *sdi);
--
1.7.10.4
------------------------------------------------------------------------------
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