static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
(void)cb_data;
fx2lafw_abort_acquisition(sdi->priv);
return SR_OK;
}
SR_PRIV int fx2lafw_start_acquisition(const struct sr_dev_inst *sdi)
{
struct sr_dev_driver *di;
struct drv_context *drvc;
struct dev_context *devc;
int timeout, ret;
size_t size;
di = sdi->driver;
drvc = di->context;
devc = sdi->priv;
devc->ctx = drvc->sr_ctx;
devc->sent_samples = 0;
devc->empty_transfer_count = 0;
devc->acq_aborted = FALSE;
if (configure_channels(sdi) != SR_OK) {
sr_err("Failed to configure channels.");
return SR_ERR;
}
timeout = get_timeout(devc);
usb_source_add(sdi->session, devc->ctx, timeout, receive_data, drvc);
size = get_buffer_size(devc);
/* Prepare for analog sampling. */
if (g_slist_length(devc->enabled_analog_channels) > 0) {
/* We need a buffer half the size of a transfer. */
devc->logic_buffer = g_try_malloc(size / 2);
devc->analog_buffer = g_try_malloc(
sizeof(float) * size / 2);
}
start_transfers(sdi);
if ((ret = command_start_acquisition(sdi)) != SR_OK) {
fx2lafw_abort_acquisition(devc);
return ret;
}
return SR_OK;
}
SR_PRIV void mso_send_data_proc(struct sr_dev_inst *sdi,
uint8_t *data, size_t length, size_t sample_width)
{
size_t i;
struct dev_context *devc;
struct sr_datafeed_analog analog;
struct sr_analog_encoding encoding;
struct sr_analog_meaning meaning;
struct sr_analog_spec spec;
(void)sample_width;
devc = sdi->priv;
length /= 2;
/* Send the logic */
for (i = 0; i < length; i++) {
devc->logic_buffer[i] = data[i * 2];
/* Rescale to -10V - +10V from 0-255. */
devc->analog_buffer[i] = (data[i * 2 + 1] - 128.0f) / 12.8f;
};
const struct sr_datafeed_logic logic = {
.length = length,
.unitsize = 1,
.data = devc->logic_buffer
};
const struct sr_datafeed_packet logic_packet = {
.type = SR_DF_LOGIC,
.payload = &logic
};
sr_session_send(sdi, &logic_packet);
sr_analog_init(&analog, &encoding, &meaning, &spec, 2);
analog.meaning->channels = devc->enabled_analog_channels;
analog.meaning->mq = SR_MQ_VOLTAGE;
analog.meaning->unit = SR_UNIT_VOLT;
analog.meaning->mqflags = 0 /* SR_MQFLAG_DC */;
analog.num_samples = length;
analog.data = devc->analog_buffer;
const struct sr_datafeed_packet analog_packet = {
.type = SR_DF_ANALOG,
.payload = &analog
};
sr_session_send(sdi, &analog_packet);
}
SR_PRIV void la_send_data_proc(struct sr_dev_inst *sdi,
uint8_t *data, size_t length, size_t sample_width)
{
const struct sr_datafeed_logic logic = {
.length = length,
.unitsize = sample_width,
.data = data
};
const struct sr_datafeed_packet packet = {
.type = SR_DF_LOGIC,
.payload = &logic
};
sr_session_send(sdi, &packet);
}
SR_PRIV void LIBUSB_CALL fx2lafw_receive_transfer(struct libusb_transfer *transfer)
{
struct sr_dev_inst *sdi;
struct dev_context *devc;
gboolean packet_has_error = FALSE;
struct sr_datafeed_packet packet;
unsigned int num_samples;
int trigger_offset, cur_sample_count, unitsize;
int pre_trigger_samples;
sdi = transfer->user_data;
devc = sdi->priv;
/*
* If acquisition has already ended, just free any queued up
* transfer that come in.
*/
if (devc->acq_aborted) {
free_transfer(transfer);
return;
}
sr_dbg("receive_transfer(): status %s received %d bytes.",
libusb_error_name(transfer->status), transfer->actual_length);
/* Save incoming transfer before reusing the transfer struct. */
unitsize = devc->sample_wide ? 2 : 1;
cur_sample_count = transfer->actual_length / unitsize;
switch (transfer->status) {
case LIBUSB_TRANSFER_NO_DEVICE:
fx2lafw_abort_acquisition(devc);
free_transfer(transfer);
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 (transfer->actual_length == 0 || packet_has_error) {
devc->empty_transfer_count++;
if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) {
/*
* The FX2 gave up. End the acquisition, the frontend
* will work out that the samplecount is short.
*/
fx2lafw_abort_acquisition(devc);
free_transfer(transfer);
} else {
resubmit_transfer(transfer);
}
return;
} else {
devc->empty_transfer_count = 0;
}
if (devc->trigger_fired) {
if (!devc->limit_samples || devc->sent_samples < devc->limit_samples) {
/* Send the incoming transfer to the session bus. */
if (devc->limit_samples && devc->sent_samples + cur_sample_count > devc->limit_samples)
num_samples = devc->limit_samples - devc->sent_samples;
else
num_samples = cur_sample_count;
if (devc->dslogic && devc->trigger_pos > devc->sent_samples
&& devc->trigger_pos <= devc->sent_samples + num_samples) {
/* DSLogic trigger in this block. Send trigger position. */
trigger_offset = devc->trigger_pos - devc->sent_samples;
/* Pre-trigger samples. */
devc->send_data_proc(sdi, (uint8_t *)transfer->buffer,
trigger_offset * unitsize, unitsize);
devc->sent_samples += trigger_offset;
/* Trigger position. */
devc->trigger_pos = 0;
packet.type = SR_DF_TRIGGER;
packet.payload = NULL;
sr_session_send(sdi, &packet);
/* Post trigger samples. */
num_samples -= trigger_offset;
devc->send_data_proc(sdi, (uint8_t *)transfer->buffer
+ trigger_offset * unitsize, num_samples * unitsize, unitsize);
devc->sent_samples += num_samples;
} else {
devc->send_data_proc(sdi, (uint8_t *)transfer->buffer,
num_samples * unitsize, unitsize);
devc->sent_samples += num_samples;
}
}
} else {
trigger_offset = soft_trigger_logic_check(devc->stl,
transfer->buffer, transfer->actual_length, &pre_trigger_samples);
if (trigger_offset > -1) {
devc->sent_samples += pre_trigger_samples;
num_samples = cur_sample_count - trigger_offset;
if (devc->limit_samples &&
num_samples > devc->limit_samples - devc->sent_samples)
num_samples = devc->limit_samples - devc->sent_samples;
devc->send_data_proc(sdi, (uint8_t *)transfer->buffer
+ trigger_offset * unitsize,
num_samples * unitsize, unitsize);
devc->sent_samples += num_samples;
devc->trigger_fired = TRUE;
}
}
if (devc->limit_samples && devc->sent_samples >= devc->limit_samples) {
fx2lafw_abort_acquisition(devc);
free_transfer(transfer);
} else
resubmit_transfer(transfer);
}
static unsigned int to_bytes_per_ms(unsigned int samplerate)
{
return samplerate / 1000;
}
SR_PRIV size_t fx2lafw_get_buffer_size(struct dev_context *devc)
{
size_t s;
/*
* The buffer should be large enough to hold 10ms of data and
* a multiple of 512.
*/
s = 10 * to_bytes_per_ms(devc->cur_samplerate);
return (s + 511) & ~511;
}
static int start_transfers(const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
struct sr_usb_dev_inst *usb;
struct sr_trigger *trigger;
struct libusb_transfer *transfer;
unsigned int i, num_transfers;
int timeout, ret;
unsigned char *buf;
size_t size;
devc = sdi->priv;
usb = sdi->conn;
devc->sent_samples = 0;
devc->acq_aborted = FALSE;
devc->empty_transfer_count = 0;
if ((trigger = sr_session_trigger_get(sdi->session))) {
int pre_trigger_samples = 0;
if (devc->limit_samples > 0)
pre_trigger_samples = (devc->capture_ratio * devc->limit_samples) / 100;
devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
if (!devc->stl)
return SR_ERR_MALLOC;
devc->trigger_fired = FALSE;
} else
devc->trigger_fired = TRUE;
num_transfers = get_number_of_transfers(devc);
size = get_buffer_size(devc);
devc->submitted_transfers = 0;
devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
if (!devc->transfers) {
sr_err("USB transfers malloc failed.");
return SR_ERR_MALLOC;
}
timeout = get_timeout(devc);
devc->num_transfers = num_transfers;
for (i = 0; i < num_transfers; i++) {
if (!(buf = g_try_malloc(size))) {
sr_err("USB transfer buffer malloc failed.");
return SR_ERR_MALLOC;
}
transfer = libusb_alloc_transfer(0);
libusb_fill_bulk_transfer(transfer, usb->devhdl,
2 | LIBUSB_ENDPOINT_IN, buf, size,
receive_transfer, (void *)sdi, timeout);
sr_info("submitting transfer: %d", i);
if ((ret = libusb_submit_transfer(transfer)) != 0) {
sr_err("Failed to submit transfer: %s.",
libusb_error_name(ret));
libusb_free_transfer(transfer);
g_free(buf);
fx2lafw_abort_acquisition(devc);
return SR_ERR;
}
devc->transfers[i] = transfer;
devc->submitted_transfers++;
}
/*
* If this device has analog channels and at least one of them is
* enabled, use mso_send_data_proc() to properly handle the analog
* data. Otherwise use la_send_data_proc().
*/
if (g_slist_length(devc->enabled_analog_channels) > 0)
devc->send_data_proc = mso_send_data_proc;
else
devc->send_data_proc = la_send_data_proc;
std_session_send_df_header(sdi);
return SR_OK;
}
static void mso_send_data_proc(struct sr_dev_inst *sdi,
uint8_t *data, size_t length, size_t sample_width)
{
size_t i;
struct dev_context *devc;
struct sr_datafeed_analog analog;
struct sr_analog_encoding encoding;
struct sr_analog_meaning meaning;
struct sr_analog_spec spec;
(void)sample_width;
devc = sdi->priv;
length /= 2;
/* Send the logic */
for (i = 0; i < length; i++) {
devc->logic_buffer[i] = data[i * 2];
/* Rescale to -10V - +10V from 0-255. */
devc->analog_buffer[i] = (data[i * 2 + 1] - 128.0f) / 12.8f;
};
const struct sr_datafeed_logic logic = {
.length = length,
.unitsize = 1,
.data = devc->logic_buffer
};
const struct sr_datafeed_packet logic_packet = {
.type = SR_DF_LOGIC,
.payload = &logic
};
sr_session_send(sdi, &logic_packet);
sr_analog_init(&analog, &encoding, &meaning, &spec, 2);
analog.meaning->channels = devc->enabled_analog_channels;
analog.meaning->mq = SR_MQ_VOLTAGE;
analog.meaning->unit = SR_UNIT_VOLT;
analog.meaning->mqflags = 0 /* SR_MQFLAG_DC */;
analog.num_samples = length;
analog.data = devc->analog_buffer;
const struct sr_datafeed_packet analog_packet = {
.type = SR_DF_ANALOG,
.payload = &analog
};
sr_session_send(sdi, &analog_packet);
}
static void la_send_data_proc(struct sr_dev_inst *sdi,
uint8_t *data, size_t length, size_t sample_width)
{
const struct sr_datafeed_logic logic = {
.length = length,
.unitsize = sample_width,
.data = data
};
const struct sr_datafeed_packet packet = {
.type = SR_DF_LOGIC,
.payload = &logic
};
sr_session_send(sdi, &packet);
}
static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
{
struct sr_dev_inst *sdi;
struct dev_context *devc;
gboolean packet_has_error = FALSE;
unsigned int num_samples;
int trigger_offset, cur_sample_count, unitsize;
int pre_trigger_samples;
sdi = transfer->user_data;
devc = sdi->priv;
/*
* If acquisition has already ended, just free any queued up
* transfer that come in.
*/
if (devc->acq_aborted) {
free_transfer(transfer);
return;
}
sr_dbg("receive_transfer(): status %s received %d bytes.",
libusb_error_name(transfer->status), transfer->actual_length);
/* Save incoming transfer before reusing the transfer struct. */
unitsize = devc->sample_wide ? 2 : 1;
cur_sample_count = transfer->actual_length / unitsize;
switch (transfer->status) {
case LIBUSB_TRANSFER_NO_DEVICE:
fx2lafw_abort_acquisition(devc);
free_transfer(transfer);
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 (transfer->actual_length == 0 || packet_has_error) {
devc->empty_transfer_count++;
if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) {
/*
* The FX2 gave up. End the acquisition, the frontend
* will work out that the samplecount is short.
*/
fx2lafw_abort_acquisition(devc);
free_transfer(transfer);
} else {
resubmit_transfer(transfer);
}
return;
} else {
devc->empty_transfer_count = 0;
}
if (devc->trigger_fired) {
if (!devc->limit_samples || devc->sent_samples < devc->limit_samples) {
/* Send the incoming transfer to the session bus. */
if (devc->limit_samples && devc->sent_samples + cur_sample_count > devc->limit_samples)
num_samples = devc->limit_samples - devc->sent_samples;
else
num_samples = cur_sample_count;
devc->send_data_proc(sdi, (uint8_t *)transfer->buffer,
num_samples * unitsize, unitsize);
devc->sent_samples += num_samples;
}
} else {
trigger_offset = soft_trigger_logic_check(devc->stl,
transfer->buffer, transfer->actual_length, &pre_trigger_samples);
if (trigger_offset > -1) {
devc->sent_samples += pre_trigger_samples;
num_samples = cur_sample_count - trigger_offset;
if (devc->limit_samples &&
num_samples > devc->limit_samples - devc->sent_samples)
num_samples = devc->limit_samples - devc->sent_samples;
devc->send_data_proc(sdi, (uint8_t *)transfer->buffer
+ trigger_offset * unitsize,
num_samples * unitsize, unitsize);
devc->sent_samples += num_samples;
devc->trigger_fired = TRUE;
}
}
if (devc->limit_samples && devc->sent_samples >= devc->limit_samples) {
fx2lafw_abort_acquisition(devc);
free_transfer(transfer);
} else
resubmit_transfer(transfer);
}
static int configure_channels(const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
const GSList *l;
int p;
struct sr_channel *ch;
uint32_t channel_mask = 0, num_analog = 0;
devc = sdi->priv;
g_slist_free(devc->enabled_analog_channels);
devc->enabled_analog_channels = NULL;
for (l = sdi->channels, p = 0; l; l = l->next, p++) {
ch = l->data;
if ((p <= NUM_CHANNELS) && (ch->type == SR_CHANNEL_ANALOG)
&& (ch->enabled)) {
num_analog++;
devc->enabled_analog_channels =
g_slist_append(devc->enabled_analog_channels, ch);
} else {
channel_mask |= ch->enabled << p;
}
}
/*
* Use wide sampling if either any of the LA channels 8..15 is enabled,
* and/or at least one analog channel is enabled.
*/
devc->sample_wide = channel_mask > 0xff || num_analog > 0;
return SR_OK;
}
static unsigned int to_bytes_per_ms(unsigned int samplerate)
{
return samplerate / 1000;
}
static size_t get_buffer_size(struct dev_context *devc)
{
size_t s;
/*
* The buffer should be large enough to hold 10ms of data and
* a multiple of 512.
*/
s = 10 * to_bytes_per_ms(devc->cur_samplerate);
return (s + 511) & ~511;
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
fx2lafw_abort_acquisition(sdi->priv);
return SR_OK;
}
SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer)
{
gboolean packet_has_error = FALSE;
struct sr_datafeed_packet packet;
struct sr_datafeed_logic logic;
struct dev_context *devc;
int trigger_offset, i, sample_width, cur_sample_count;
int trigger_offset_bytes;
uint8_t *cur_buf;
uint16_t cur_sample;
devc = transfer->user_data;
/*
* If acquisition has already ended, just free any queued up
* transfer that come in.
*/
if (devc->num_samples == -1) {
free_transfer(transfer);
return;
}
sr_info("receive_transfer(): status %d received %d bytes.",
transfer->status, transfer->actual_length);
/* Save incoming transfer before reusing the transfer struct. */
cur_buf = transfer->buffer;
sample_width = devc->sample_wide ? 2 : 1;
cur_sample_count = transfer->actual_length / sample_width;
switch (transfer->status) {
case LIBUSB_TRANSFER_NO_DEVICE:
fx2lafw_abort_acquisition(devc);
free_transfer(transfer);
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 (transfer->actual_length == 0 || packet_has_error) {
devc->empty_transfer_count++;
if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) {
/*
* The FX2 gave up. End the acquisition, the frontend
* will work out that the samplecount is short.
*/
fx2lafw_abort_acquisition(devc);
free_transfer(transfer);
} else {
resubmit_transfer(transfer);
}
return;
} else {
devc->empty_transfer_count = 0;
}
trigger_offset = 0;
if (devc->trigger_stage >= 0) {
for (i = 0; i < cur_sample_count; i++) {
cur_sample = devc->sample_wide ?
*((uint16_t *)cur_buf + i) :
*((uint8_t *)cur_buf + i);
if ((cur_sample & devc->trigger_mask[devc->trigger_stage]) ==
devc->trigger_value[devc->trigger_stage]) {
/* Match on this trigger stage. */
devc->trigger_buffer[devc->trigger_stage] = cur_sample;
devc->trigger_stage++;
if (devc->trigger_stage == NUM_TRIGGER_STAGES ||
devc->trigger_mask[devc->trigger_stage] == 0) {
/* Match on all trigger stages, we're done. */
trigger_offset = i + 1;
/*
* TODO: Send pre-trigger buffer to session bus.
* Tell the frontend we hit the trigger here.
*/
packet.type = SR_DF_TRIGGER;
packet.payload = NULL;
sr_session_send(devc->cb_data, &packet);
/*
* Send the samples that triggered it,
* since we're skipping past them.
*/
packet.type = SR_DF_LOGIC;
packet.payload = &logic;
logic.unitsize = sample_width;
logic.length = devc->trigger_stage * logic.unitsize;
logic.data = devc->trigger_buffer;
sr_session_send(devc->cb_data, &packet);
devc->trigger_stage = TRIGGER_FIRED;
break;
}
} else if (devc->trigger_stage > 0) {
/*
* We had a match before, but not in the next sample. However, we may
* have a match on this stage in the next bit -- trigger on 0001 will
* fail on seeing 00001, so we need to go back to stage 0 -- but at
* the next sample from the one that matched originally, which the
* counter increment at the end of the loop takes care of.
*/
i -= devc->trigger_stage;
if (i < -1)
i = -1; /* Oops, went back past this buffer. */
/* Reset trigger stage. */
devc->trigger_stage = 0;
}
}
}
if (devc->trigger_stage == TRIGGER_FIRED) {
/* Send the incoming transfer to the session bus. */
trigger_offset_bytes = trigger_offset * sample_width;
packet.type = SR_DF_LOGIC;
packet.payload = &logic;
logic.length = transfer->actual_length - trigger_offset_bytes;
logic.unitsize = sample_width;
logic.data = cur_buf + trigger_offset_bytes;
sr_session_send(devc->cb_data, &packet);
devc->num_samples += cur_sample_count;
if (devc->limit_samples &&
(unsigned int)devc->num_samples > devc->limit_samples) {
fx2lafw_abort_acquisition(devc);
free_transfer(transfer);
return;
}
} else {
/*
* TODO: Buffer pre-trigger data in capture
* ratio-sized buffer.
*/
}
resubmit_transfer(transfer);
}
static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
struct dev_context *devc;
struct drv_context *drvc;
struct sr_usb_dev_inst *usb;
struct sr_trigger *trigger;
struct libusb_transfer *transfer;
unsigned int i, timeout, num_transfers;
int ret;
unsigned char *buf;
size_t size;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
drvc = di->priv;
devc = sdi->priv;
usb = sdi->conn;
devc->cb_data = cb_data;
devc->sent_samples = 0;
devc->acq_aborted = FALSE;
devc->empty_transfer_count = 0;
if ((trigger = sr_session_trigger_get())) {
devc->stl = soft_trigger_logic_new(sdi, trigger);
devc->trigger_fired = FALSE;
} else
devc->trigger_fired = TRUE;
timeout = fx2lafw_get_timeout(devc);
num_transfers = fx2lafw_get_number_of_transfers(devc);
size = fx2lafw_get_buffer_size(devc);
devc->submitted_transfers = 0;
devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
if (!devc->transfers) {
sr_err("USB transfers malloc failed.");
return SR_ERR_MALLOC;
}
devc->num_transfers = num_transfers;
for (i = 0; i < num_transfers; i++) {
if (!(buf = g_try_malloc(size))) {
sr_err("USB transfer buffer malloc failed.");
return SR_ERR_MALLOC;
}
transfer = libusb_alloc_transfer(0);
libusb_fill_bulk_transfer(transfer, usb->devhdl,
2 | LIBUSB_ENDPOINT_IN, buf, size,
fx2lafw_receive_transfer, (void *)sdi, timeout);
if ((ret = libusb_submit_transfer(transfer)) != 0) {
sr_err("Failed to submit transfer: %s.",
libusb_error_name(ret));
libusb_free_transfer(transfer);
g_free(buf);
fx2lafw_abort_acquisition(devc);
return SR_ERR;
}
devc->transfers[i] = transfer;
devc->submitted_transfers++;
}
devc->ctx = drvc->sr_ctx;
usb_source_add(devc->ctx, timeout, receive_data, NULL);
/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, LOG_PREFIX);
if ((ret = fx2lafw_command_start_acquisition(sdi)) != SR_OK) {
fx2lafw_abort_acquisition(devc);
return ret;
}
return SR_OK;
}
