#define FPGA_FW_LA1016 "kingst-la1016-fpga.bitstream"
#define FPGA_FW_LA1016A "kingst-la1016a1-fpga.bitstream"
-/*
- * Default device configuration. Must be applicable to any of the
- * supported devices (no model specific default values yet). Specific
- * firmware implementation details unfortunately won't let us detect
- * and keep using previously configured values.
- */
-#define LA2016_DFLT_SAMPLERATE SR_MHZ(100)
-#define LA2016_DFLT_SAMPLEDEPTH (5 * 1000 * 1000)
-#define LA2016_DFLT_CAPT_RATIO 5 /* Capture ratio, in percent. */
-
/* USB vendor class control requests, executed by the Cypress FX2 MCU. */
#define CMD_FPGA_ENABLE 0x10
#define CMD_FPGA_SPI 0x20 /* R/W access to FPGA registers via SPI. */
devc = sdi->priv;
- devc->capture_ratio = LA2016_DFLT_CAPT_RATIO;
- devc->limit_samples = LA2016_DFLT_SAMPLEDEPTH;
- devc->cur_samplerate = LA2016_DFLT_SAMPLERATE;
-
ret = set_threshold_voltage(sdi, devc->threshold_voltage);
if (ret)
return ret;
struct dev_context *devc;
double clock_divisor;
uint16_t divider_u16;
+ uint64_t limit_samples;
uint64_t pre_trigger_samples;
uint64_t pre_trigger_memory;
uint8_t buf[REG_TRIGGER - REG_SAMPLING]; /* Width of REG_SAMPLING. */
divider_u16 = (uint16_t)(clock_divisor + 0.5);
devc->cur_samplerate = devc->max_samplerate / divider_u16;
- if (devc->limit_samples > LA2016_NUM_SAMPLES_MAX) {
- sr_err("Too high a sample depth: %" PRIu64 ".",
- devc->limit_samples);
- return SR_ERR;
+ ret = sr_sw_limits_get_remain(&devc->sw_limits,
+ &limit_samples, NULL, NULL, NULL);
+ if (ret != SR_OK) {
+ sr_err("Cannot get acquisition limits.");
+ return ret;
}
- if (devc->limit_samples < LA2016_NUM_SAMPLES_MIN) {
- sr_err("Too low a sample depth: %" PRIu64 ".",
- devc->limit_samples);
- return SR_ERR;
+ if (limit_samples > LA2016_NUM_SAMPLES_MAX) {
+ sr_err("Too high a sample depth: %" PRIu64 ".", limit_samples);
+ return SR_ERR_ARG;
+ }
+ if (limit_samples < LA2016_NUM_SAMPLES_MIN) {
+ sr_err("Too low a sample depth: %" PRIu64 ".", limit_samples);
+ return SR_ERR_ARG;
}
/*
* data. Only the upper 24 bits of that memory size spec get
* communicated to the device (written to its FPGA register).
*/
- pre_trigger_samples = devc->limit_samples * devc->capture_ratio / 100;
+ pre_trigger_samples = limit_samples * devc->capture_ratio / 100;
pre_trigger_memory = LA2016_PRE_MEM_LIMIT_BASE;
pre_trigger_memory *= devc->capture_ratio;
pre_trigger_memory /= 100;
sr_dbg("Set sample config: %" PRIu64 "kHz, %" PRIu64 " samples.",
- devc->cur_samplerate / 1000, devc->limit_samples);
+ devc->cur_samplerate / 1000, limit_samples);
sr_dbg("Capture ratio %" PRIu64 "%%, count %" PRIu64 ", mem %" PRIu64 ".",
devc->capture_ratio, pre_trigger_samples, pre_trigger_memory);
+ if (!devc->trigger_involved) {
+ sr_dbg("Voiding pre-trigger setup. No trigger involved.");
+ pre_trigger_samples = 1;
+ pre_trigger_memory = 0x100;
+ }
+
/*
* The acquisition configuration occupies a total of 16 bytes:
* - A 34bit total samples count limit (up to 10 billions) that
* - An 8bit register of unknown meaning. Currently always 0.
*/
wrptr = buf;
- write_u40le_inc(&wrptr, devc->limit_samples);
+ write_u40le_inc(&wrptr, limit_samples);
write_u40le_inc(&wrptr, pre_trigger_samples);
write_u24le_inc(&wrptr, pre_trigger_memory >> 8);
write_u16le_inc(&wrptr, divider_u16);
const uint8_t *packets, size_t num_xfers)
{
struct dev_context *devc;
- struct sr_datafeed_logic logic;
- struct sr_datafeed_packet sr_packet;
- unsigned int max_samples, n_samples, total_samples, free_n_samples;
size_t num_pkts;
- gboolean do_signal_trigger;
- uint8_t *wp;
const uint8_t *rp;
uint16_t sample_value;
size_t repetitions;
devc = sdi->priv;
- logic.unitsize = sizeof(sample_buff);
- logic.data = devc->convbuffer;
-
- sr_packet.type = SR_DF_LOGIC;
- sr_packet.payload = &logic;
-
- max_samples = devc->convbuffer_size / sizeof(sample_buff);
- n_samples = 0;
- wp = devc->convbuffer;
- total_samples = 0;
- do_signal_trigger = FALSE;
+ /* Ignore incoming USB data after complete sample data download. */
+ if (devc->download_finished)
+ return;
if (devc->trigger_involved && !devc->trigger_marked && devc->info.n_rep_packets_before_trigger == 0) {
- std_session_send_df_trigger(sdi);
+ feed_queue_logic_send_trigger(devc->feed_queue);
devc->trigger_marked = TRUE;
}
while (num_xfers--) {
num_pkts = NUM_PACKETS_IN_CHUNK;
while (num_pkts--) {
- /*
- * Flush the conversion buffer when a trigger
- * location needs to get communicated, or when
- * an to-get-expected sample repetition count
- * would no longer fit into the buffer.
- */
- free_n_samples = max_samples - n_samples;
- if (free_n_samples < 256 || do_signal_trigger) {
- logic.length = n_samples * sizeof(sample_buff);;
- sr_session_send(sdi, &sr_packet);
- n_samples = 0;
- wp = devc->convbuffer;
- if (do_signal_trigger) {
- std_session_send_df_trigger(sdi);
- do_signal_trigger = FALSE;
- }
- }
sample_value = read_u16le_inc(&rp);
repetitions = read_u8_inc(&rp);
- n_samples += repetitions;
- total_samples += repetitions;
devc->total_samples += repetitions;
write_u16le(sample_buff, sample_value);
- while (repetitions--) {
- memcpy(wp, sample_buff, logic.unitsize);
- wp += logic.unitsize;
- }
+ feed_queue_logic_submit(devc->feed_queue,
+ sample_buff, repetitions);
+ sr_sw_limits_update_samples_read(&devc->sw_limits,
+ repetitions);
if (devc->trigger_involved && !devc->trigger_marked) {
if (!--devc->n_reps_until_trigger) {
+ feed_queue_logic_send_trigger(devc->feed_queue);
devc->trigger_marked = TRUE;
- do_signal_trigger = TRUE;
sr_dbg("Trigger position after %" PRIu64 " samples, %.6fms.",
devc->total_samples,
(double)devc->total_samples / devc->cur_samplerate * 1e3);
}
(void)read_u8_inc(&rp); /* Skip sequence number. */
}
- if (n_samples) {
- logic.length = n_samples * logic.unitsize;
- sr_session_send(sdi, &sr_packet);
- if (do_signal_trigger) {
- std_session_send_df_trigger(sdi);
- }
+
+ if (!devc->download_finished && sr_sw_limits_check(&devc->sw_limits)) {
+ sr_dbg("Acquisition limit reached.");
+ devc->download_finished = TRUE;
+ }
+ if (devc->download_finished) {
+ sr_dbg("Download finished, flushing session feed queue.");
+ feed_queue_logic_flush(devc->feed_queue);
}
- sr_dbg("Send_chunk done after %u samples.", total_samples);
+ sr_dbg("Total samples after chunk: %" PRIu64 ".", devc->total_samples);
}
static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
struct sr_dev_inst *sdi;
struct dev_context *devc;
struct sr_usb_dev_inst *usb;
+ size_t num_xfers;
int ret;
sdi = transfer->user_data;
sr_dbg("receive_transfer(): status %s received %d bytes.",
libusb_error_name(transfer->status), transfer->actual_length);
-
- if (transfer->status == LIBUSB_TRANSFER_TIMED_OUT) {
- sr_err("USB bulk transfer timeout.");
- devc->download_finished = TRUE;
- }
- send_chunk(sdi, transfer->buffer, transfer->actual_length / TRANSFER_PACKET_LENGTH);
+ /*
+ * Implementation detail: A USB transfer timeout is not fatal
+ * here. We just process whatever was received, empty input is
+ * perfectly acceptable. Reaching (or exceeding) the sw limits
+ * or exhausting the device's captured data will complete the
+ * sample data download.
+ */
+ num_xfers = transfer->actual_length / TRANSFER_PACKET_LENGTH;
+ send_chunk(sdi, transfer->buffer, num_xfers);
devc->n_bytes_to_read -= transfer->actual_length;
if (devc->n_bytes_to_read) {
struct dev_context *devc;
struct drv_context *drvc;
struct timeval tv;
+ int ret;
(void)fd;
(void)revents;
devc = sdi->priv;
drvc = sdi->driver->context;
+ /*
+ * Wait for the acquisition to complete in hardware.
+ * Periodically check a potentially configured msecs timeout.
+ */
if (!devc->completion_seen) {
if (!la2016_is_idle(sdi)) {
+ if (sr_sw_limits_check(&devc->sw_limits)) {
+ devc->sw_limits.limit_msec = 0;
+ sr_dbg("Limit reached. Stopping acquisition.");
+ la2016_stop_acquisition(sdi);
+ }
/* Not yet ready for sample data download. */
return TRUE;
}
+ sr_dbg("Acquisition completion seen (hardware).");
+ devc->sw_limits.limit_msec = 0;
devc->completion_seen = TRUE;
devc->download_finished = FALSE;
devc->trigger_marked = FALSE;
devc->total_samples = 0;
- /* We can start downloading sample data. */
- if (la2016_start_download(sdi, receive_transfer) != SR_OK) {
+
+ /* Initiate the download of acquired sample data. */
+ std_session_send_df_frame_begin(sdi);
+ ret = la2016_start_download(sdi, receive_transfer);
+ if (ret != SR_OK) {
sr_err("Cannot start acquisition data download.");
return FALSE;
}
sr_dbg("Acquisition data download started.");
- std_session_send_df_frame_begin(sdi);
return TRUE;
}
+ /* Handle USB reception. Drives sample data download. */
tv.tv_sec = tv.tv_usec = 0;
libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
+ /* Postprocess completion of sample data download. */
if (devc->download_finished) {
sr_dbg("Download finished, post processing.");
- std_session_send_df_frame_end(sdi);
-
- usb_source_remove(sdi->session, drvc->sr_ctx);
- std_session_send_df_end(sdi);
la2016_stop_acquisition(sdi);
-
- g_free(devc->convbuffer);
- devc->convbuffer = NULL;
-
+ usb_source_remove(sdi->session, drvc->sr_ctx);
devc->transfer = NULL;
+ feed_queue_logic_flush(devc->feed_queue);
+ feed_queue_logic_free(devc->feed_queue);
+ devc->feed_queue = NULL;
+ std_session_send_df_frame_end(sdi);
+ std_session_send_df_end(sdi);
+
sr_dbg("Download finished, done post processing.");
}
projects / libsigrok.git / blobdiff