*/
#include <config.h>
+#include <math.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <libusb.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
-#include "dso.h"
+#include "protocol.h"
/* Max time in ms before we want to check on USB events */
/* TODO tune this properly */
#define TICK 1
-#define NUM_TIMEBASE 10
-#define NUM_VDIV 8
+#define NUM_TIMEBASE 10
+#define NUM_VDIV 8
#define NUM_BUFFER_SIZES 2
static const uint32_t devopts[] = {
SR_CONF_CONTINUOUS,
- SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
SR_CONF_CONN | SR_CONF_GET,
+ SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
- SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+ SR_CONF_NUM_HDIV | SR_CONF_GET,
+ SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET,
- SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
- SR_CONF_NUM_HDIV | SR_CONF_GET,
+ SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
SR_CONF_NUM_VDIV | SR_CONF_GET,
};
static const uint32_t devopts_cg[] = {
- SR_CONF_FILTER | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+ SR_CONF_FILTER | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
};
static const char *channel_names[] = {
devc->profile = prof;
devc->dev_state = IDLE;
devc->timebase = DEFAULT_TIMEBASE;
- devc->ch1_enabled = TRUE;
- devc->ch2_enabled = TRUE;
+ devc->ch_enabled[0] = TRUE;
+ devc->ch_enabled[1] = TRUE;
devc->voltage[0] = DEFAULT_VOLTAGE;
devc->voltage[1] = DEFAULT_VOLTAGE;
devc->coupling[0] = DEFAULT_COUPLING;
devc = sdi->priv;
g_slist_free(devc->enabled_channels);
- devc->ch1_enabled = devc->ch2_enabled = FALSE;
+ devc->ch_enabled[0] = devc->ch_enabled[1] = FALSE;
for (l = sdi->channels, p = 0; l; l = l->next, p++) {
ch = l->data;
if (p == 0)
- devc->ch1_enabled = ch->enabled;
+ devc->ch_enabled[0] = ch->enabled;
else
- devc->ch2_enabled = ch->enabled;
+ devc->ch_enabled[1] = ch->enabled;
if (ch->enabled)
devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
}
err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
if (err != 0) {
sr_err("Unable to claim interface: %s.",
- libusb_error_name(err));
+ libusb_error_name(err));
return SR_ERR;
}
struct sr_analog_encoding encoding;
struct sr_analog_meaning meaning;
struct sr_analog_spec spec;
- struct dev_context *devc;
- float ch1, ch2, range;
- int num_channels, data_offset;
- unsigned int i;
+ struct dev_context *devc = sdi->priv;
+ GSList *channels = devc->enabled_channels;
- devc = sdi->priv;
- num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
packet.type = SR_DF_ANALOG;
packet.payload = &analog;
/* TODO: support for 5xxx series 9-bit samples */
sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
- analog.meaning->channels = devc->enabled_channels;
analog.num_samples = num_samples;
analog.meaning->mq = SR_MQ_VOLTAGE;
analog.meaning->unit = SR_UNIT_VOLT;
analog.meaning->mqflags = 0;
/* TODO: Check malloc return value. */
- analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_channels);
- data_offset = 0;
- for (i = 0; i < analog.num_samples; i++) {
- /*
- * The device always sends data for both channels. If a channel
- * is disabled, it contains a copy of the enabled channel's
- * data. However, we only send the requested channels to
- * the bus.
- *
- * Voltage values are encoded as a value 0-255 (0-512 on the
- * DSO-5200*), where the value is a point in the range
- * represented by the vdiv setting. There are 8 vertical divs,
- * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
- * and 255 = +2V.
- */
- /* TODO: Support for DSO-5xxx series 9-bit samples. */
- if (devc->ch1_enabled) {
- range = ((float)vdivs[devc->voltage[0]][0] / vdivs[devc->voltage[0]][1]) * 8;
- ch1 = range / 255 * *(buf + i * 2 + 1);
- /* Value is centered around 0V. */
- ch1 -= range / 2;
- ((float *)analog.data)[data_offset++] = ch1;
- }
- if (devc->ch2_enabled) {
- range = ((float)vdivs[devc->voltage[1]][0] / vdivs[devc->voltage[1]][1]) * 8;
- ch2 = range / 255 * *(buf + i * 2);
- ch2 -= range / 2;
- ((float *)analog.data)[data_offset++] = ch2;
+ analog.data = g_try_malloc(num_samples * sizeof(float));
+
+ for (int ch = 0; ch < 2; ch++) {
+ if (!devc->ch_enabled[ch])
+ continue;
+
+ float range = ((float)vdivs[devc->voltage[ch]][0] / vdivs[devc->voltage[ch]][1]) * 8;
+ float vdivlog = log10f(range / 255);
+ int digits = -(int)vdivlog + (vdivlog < 0.0);
+ analog.encoding->digits = digits;
+ analog.spec->spec_digits = digits;
+ analog.meaning->channels = g_slist_append(NULL, channels->data);
+
+ for (int i = 0; i < num_samples; i++) {
+ /*
+ * The device always sends data for both channels. If a channel
+ * is disabled, it contains a copy of the enabled channel's
+ * data. However, we only send the requested channels to
+ * the bus.
+ *
+ * Voltage values are encoded as a value 0-255 (0-512 on the
+ * DSO-5200*), where the value is a point in the range
+ * represented by the vdiv setting. There are 8 vertical divs,
+ * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
+ * and 255 = +2V.
+ */
+ /* TODO: Support for DSO-5xxx series 9-bit samples. */
+ ((float *)analog.data)[i] = range / 255 * *(buf + i * 2 + 1 - ch) - range / 2;
}
+ sr_session_send(sdi, &packet);
+ g_slist_free(analog.meaning->channels);
+
+ channels = channels->next;
}
- sr_session_send(sdi, &packet);
g_free(analog.data);
}
num_samples = transfer->actual_length / 2;
sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
- devc->samp_received + num_samples, devc->framesize);
+ devc->samp_received + num_samples, devc->framesize);
/*
* The device always sends a full frame, but the beginning of the frame
/* The rest of this chunk starts with the trigger point. */
sr_dbg("Reached trigger point, %d samples buffered.",
- devc->samp_buffered);
+ devc->samp_buffered);
/* Avoid the corner case where the chunk ended at
* exactly the trigger point. */
/* That was the last chunk in this frame. Send the buffered
* pre-trigger samples out now, in one big chunk. */
sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
- devc->samp_buffered);
+ devc->samp_buffered);
send_chunk(sdi, devc->framebuf, devc->samp_buffered);
/* Mark the end of this frame. */
/* Remember where in the captured frame the trigger is. */
devc->trigger_offset = trigger_offset;
- num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
+ num_channels = (devc->ch_enabled[0] && devc->ch_enabled[1]) ? 2 : 1;
devc->framebuf = g_malloc(devc->framesize * num_channels * 2);
devc->samp_buffered = devc->samp_received = 0;