/*
* This file is part of the libsigrok project.
*
- * Copyright (C) 2022
AC0BI <ac0bi00@gmail.com>
+ * Copyright (C) 2022
Shawn Walker <ac0bi00@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#define _GNU_SOURCE
#include <config.h>
+#include <errno.h>
+#include <glib.h>
+#include <math.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <libsigrok/libsigrok.h>
+#include "libsigrok-internal.h"
#include "protocol.h"
-SR_PRIV int raspberrypi_pico_receive_data(int fd, int revents, void *cb_data)
+SR_PRIV int send_serial_str(struct sr_serial_dev_inst *serial, char *str)
{
- const struct sr_dev_inst *sdi;
- struct dev_context *devc;
+ int len = strlen(str);
+ if ((len > 15) || (len < 1)) {
+ sr_err("ERROR: Serial string len %d invalid ", len);
+ return SR_ERR;
+ }
+
+ /* 100ms timeout. With USB CDC serial we can't define the timeout based
+ * on link rate, so just pick something large as we shouldn't normally
+ * see them */
+ if (serial_write_blocking(serial, str, len, 100) != len) {
+ sr_err("ERROR: Serial str write failed");
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}
+
+SR_PRIV int send_serial_char(struct sr_serial_dev_inst *serial, char ch)
+{
+ char buf[1];
+ buf[0] = ch;
+
+ if (serial_write_blocking(serial, buf, 1, 100) != 1) { /* 100ms */
+ sr_err("ERROR: Serial char write failed");
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}
+
+/* Issue a command that expects a string return that is less than 30 characters.
+ * Returns the length of string */
+int send_serial_w_resp(struct sr_serial_dev_inst *serial, char *str,
+ char *resp, size_t cnt)
+{
+ int num_read, i;
+ send_serial_str(serial, str);
+
+ /* Using the serial_read_blocking function when reading a response of
+ * unknown length requires a long worst case timeout to always be taken.
+ * So, instead loop waiting for a first byte, and then a final small delay
+ * for the rest. */
+ for (i = 0; i < 1000; i++) { /* wait up to 1 second in ms increments */
+ num_read = serial_read_blocking(serial, resp, cnt, 1);
+ if (num_read > 0)
+ break;
+ }
+
+ /* Since the serial port is USB CDC we can't calculate timeouts based on
+ * baud rate but even if the response is split between two USB transfers,
+ * 10ms should be plenty. */
+ num_read += serial_read_blocking(serial, &(resp[num_read]), cnt - num_read,
+ 10);
+ if ((num_read < 1) || (num_read > 30)) {
+ sr_err("ERROR: Serial_w_resp failed (%d).", num_read);
+ return -1;
+ } else
+ return num_read;
+}
+
+/* Issue a command that expects a single char ack */
+SR_PRIV int send_serial_w_ack(struct sr_serial_dev_inst *serial, char *str)
+{
+ char buf[2];
+ int num_read;
+
+ /* In case we have left over transfer from the device, drain them.
+ * These should not exist in normal operation */
+ while ((num_read = serial_read_blocking(serial, buf, 2, 10)))
+ sr_dbg("swack drops 2 bytes %d %d", buf[0], buf[1]);
+
+ send_serial_str(serial, str);
+
+ /* 1000ms timeout */
+ num_read = serial_read_blocking(serial, buf, 1, 1000);
+
+ if ((num_read == 1) && (buf[0] == '*')) {
+ return SR_OK;
+ } else {
+ sr_err("ERROR: Serial_w_ack %s failed (%d).", str, num_read);
+ if (num_read)
+ sr_err("ack resp char %c d %d", buf[0], buf[0]);
+ return SR_ERR;
+ }
+}
+
+/* Process incoming data stream assuming it is optimized packing of 4 channels
+ * or less.
+ * Each byte is 4 channels of data and a 3 bit rle value, or a larger rle value,
+ * or a control signal. This also checks for aborts and ends.
+ * If an end is seen we stop processing but do not check the byte_cnt
+ * The output is a set of samples fed to process group to perform sw triggering
+ * and sending of data to the session as well as maintenance of the serial rx
+ * byte cnt.
+ * Since we can get huge rle values we chop them up for processing into smaller
+ * groups.
+ * In this mode we can always consume all bytes because there are no cases where
+ * the processing of one byte requires the one after it. */
+void process_D4(struct sr_dev_inst *sdi, struct dev_context *d)
+{
+ uint32_t j;
+ uint8_t cbyte, cval;
+ uint32_t rlecnt = 0;
+
+ while (d->ser_rdptr < d->bytes_avail) {
+ cbyte = d->buffer[(d->ser_rdptr)];
+
+ /*RLE only byte */
+ if ((cbyte >= 48) && (cbyte <= 127)) {
+ rlecnt += (cbyte - 47) * 8;
+ d->byte_cnt++;
+ } else if (cbyte >= 0x80) { /* sample with possible rle */
+ rlecnt += (cbyte & 0x70) >> 4;
+ if (rlecnt) {
+ /* On a value change, duplicate the previous values first. */
+ rle_memset(d, rlecnt);
+ rlecnt = 0;
+ }
+ /* Finally add in the new values */
+ cval = cbyte & 0xF;
+ uint32_t didx = (d->cbuf_wrptr) * (d->dig_sample_bytes);
+ d->d_data_buf[didx] = cval;
+
+ /* Pad in all other bytes since the sessions even wants disabled
+ * channels reported */
+ for (j = 1; j < d->dig_sample_bytes; j++)
+ d->d_data_buf[didx+j] = 0;
+
+ d->byte_cnt++;
+ sr_spew("Dchan4 rdptr %d wrptr %d bytein 0x%X rle %d cval 0x%X didx %d",
+ (d->ser_rdptr) - 1, d->cbuf_wrptr, cbyte, rlecnt, cval, didx);
+ d->cbuf_wrptr++;
+ rlecnt = 0;
+ d->d_last[0] = cval;
+ } else {
+ /* Any other character ends parsing - it could be a frame error or a
+ * start of the final byte cnt */
+ if (cbyte == '$') {
+ sr_info("D4 Data stream stops with cbyte %d char %c rdidx %d cnt %lu",
+ cbyte, cbyte, d->ser_rdptr, d->byte_cnt);
+ d->rxstate = RX_STOPPED;
+ } else {
+ sr_err("D4 Data stream aborts with cbyte %d char %c rdidx %d cnt %lu",
+ cbyte, cbyte, d->ser_rdptr, d->byte_cnt);
+ d->rxstate = RX_ABORT;
+ }
+ break; /* break from while loop */
+ }
+
+ (d->ser_rdptr)++;
+ /* To ensure we don't overflow the sample buffer, but still send it
+ * large chunks of data (to make the packet sends to the session
+ * efficient) only call process group after a large number of samples
+ * have been seen. cbuf_wrptr counts slices, so shift right by 2 to
+ * create a worst case x4 multiple ratio of cbuf_wrptr value to the
+ * depth of the sample buffer.
+ * Likely we could use the max rle value of 640 but 1024 gives some
+ * extra room. Also do a simple check of rlecnt>2000 since that is a
+ * reasonable minimal value to send to the session */
+ if ((rlecnt >= 2000) || \
+ ((rlecnt + ((d->cbuf_wrptr) <<2 ))) > (d->sample_buf_size - 1024)) {
+ sr_spew("D4 preoverflow wrptr %d bufsize %d rlecnt %d\n\r",
+ d->cbuf_wrptr, d->sample_buf_size, rlecnt);
+ rle_memset(d, rlecnt);
+ process_group(sdi, d, d->cbuf_wrptr);
+ rlecnt = 0;
+ }
+
+ } /*while rdptr < wrptr*/
+
+ sr_spew("D4 while done rdptr %d", d->ser_rdptr);
+
+ /* If we reach the end of the serial input stream send any remaining values
+ * or rles to the session */
+ if (rlecnt) {
+ sr_spew("Residual D4 slice rlecnt %d", rlecnt);
+ rle_memset(d, rlecnt);
+ }
+ if (d->cbuf_wrptr) {
+ sr_spew("Residual D4 data wrptr %d", d->cbuf_wrptr);
+ process_group(sdi, d, d->cbuf_wrptr);
+ }
+}
+
+/* Process incoming data stream and forward to trigger processing with
+ * process_group
+ * The final value of ser_rdptr indicates how many bytes were processed.
+ * This version handles all other enabled channel configurations that
+ * Process_D4 doesn't */
+void process_slice(struct sr_dev_inst *sdi, struct dev_context *devc)
+{
+ int32_t i;
+ uint32_t tmp32, cword;
+ uint8_t cbyte;
+ uint32_t slice_bytes; /* Number of bytes that have legal slice values including RLE */
+
+ /* Only process legal data values for this mode which are 0x32-0x7F for RLE and 0x80 to 0xFF for data*/
+ for (slice_bytes = 1; (slice_bytes < devc->bytes_avail)
+ && (devc->buffer[slice_bytes - 1] >= 0x30); slice_bytes++);
+
+ if (slice_bytes != devc->bytes_avail) {
+ cbyte = devc->buffer[slice_bytes - 1];
+ slice_bytes--; /* Don't process the ending character */
+ if (cbyte == '$') {
+ sr_info("Data stream stops with cbyte %d char %c rdidx %d sbytes %d cnt %lu",
+ cbyte, cbyte, devc->ser_rdptr, slice_bytes, devc->byte_cnt);
+ devc->rxstate = RX_STOPPED;
+ } else {
+ sr_err("Data stream aborts with cbyte %d char %c rdidx %d sbytes %d cnt %lu",
+ cbyte, cbyte, devc->ser_rdptr, slice_bytes, devc->byte_cnt);
+ devc->rxstate = RX_ABORT;
+ }
+ }
+
+ /* If the wrptr is non-zero due to a residual from the previous serial
+ * transfer, don't double count it towards byte_cnt*/
+ devc->byte_cnt += slice_bytes - (devc->wrptr);
+
+ sr_spew("process slice avail %d rdptr %d sb %d byte_cnt %" PRIu64 "",
+ devc->bytes_avail, devc->ser_rdptr, slice_bytes, devc->byte_cnt);
+
+ /* Must have a full slice or one rle byte */
+ while (((devc->ser_rdptr + devc->bytes_per_slice) <= slice_bytes)
+ || ((devc->ser_rdptr < slice_bytes) &&
+ (devc->buffer[devc->ser_rdptr] < 0x80))) {
+
+ if (devc->buffer[devc->ser_rdptr] < 0x80) {
+ int16_t rlecnt;
+ if (devc->buffer[devc->ser_rdptr] <= 79)
+ rlecnt = devc->buffer[devc->ser_rdptr] - 47;
+ else
+ rlecnt = (devc->buffer[devc->ser_rdptr] - 78) * 32;
+
+ sr_info("RLEcnt of %d in %d", rlecnt, devc->buffer[devc->ser_rdptr]);
+ if ((rlecnt < 1) || (rlecnt > 1568))
+ sr_err("Bad rlecnt val %d in %d",
+ rlecnt, devc->buffer[devc->ser_rdptr]);
+ else
+ rle_memset(devc,rlecnt);
+
+ devc->ser_rdptr++;
+
+ } else {
+ cword = 0;
+ /* Build up a word 7 bits at a time, using only enabled channels */
+ for (i = 0; i < devc->num_d_channels; i += 7) {
+ if (((devc->d_chan_mask) >> i) & 0x7F) {
+ cword |= ((devc->buffer[devc->ser_rdptr]) & 0x7F) << i;
+ (devc->ser_rdptr)++;
+ }
+ }
+ /* And then distribute 8 bits at a time to all possible channels
+ * but first save of cword for rle */
+ devc->d_last[0] = cword & 0xFF;
+ devc->d_last[1] = (cword >> 8) & 0xFF;
+ devc->d_last[2] = (cword >> 16) & 0xFF;
+ devc->d_last[3] = (cword >> 24) & 0xFF;
+
+ for (i = 0; i < devc->num_d_channels; i += 8) {
+ uint32_t idx = ((devc->cbuf_wrptr) * devc->dig_sample_bytes) +
+ (i >> 3);
+ devc->d_data_buf[idx] = cword & 0xFF;
+ sr_spew("Dchan i %d wrptr %d idx %d char 0x%X cword 0x%X",
+ i, devc->cbuf_wrptr, idx, devc->d_data_buf[idx], cword);
+ cword >>= 8;
+ }
+
+ /* Each analog value is one or more 7 bit values */
+ for (i = 0; i < devc->num_a_channels; i++) {
+ if ((devc->a_chan_mask >> i) & 1) {
+
+ tmp32 =
+ devc->buffer[devc->ser_rdptr] - 0x80;
+ for(int a=1;a<devc->a_size;a++){
+ tmp32+=(devc->buffer[(devc->ser_rdptr)+a] - 0x80)<<(7*a);
+ }
+ devc->a_data_bufs[i][devc->cbuf_wrptr] =
+ ((float) tmp32 * devc->a_scale[i]) +
+ devc->a_offset[i];
+ devc->a_last[i] =
+ devc->a_data_bufs[i][devc->cbuf_wrptr];
+ sr_spew
+ ("AChan %d t32 %d value %f wrptr %d rdptr %d sc %f off %f",
+ i, tmp32,
+ devc->
+ a_data_bufs[i][devc->cbuf_wrptr],
+ devc->cbuf_wrptr, devc->ser_rdptr,
+ devc->a_scale[i], devc->a_offset[i]);
+ devc->ser_rdptr+=devc->a_size;
+ } /*if channel enabled*/
+ } /*for num_a_channels*/
+ devc->cbuf_wrptr++;
+ }/*Not an RLE */
+ /*RLEs can create a large number of samples relative to the incoming serial buffer
+ To prevent overflow of the sample data buffer we call process_group.
+ cbuf_wrptr and sample_buf_size are both in terms of slices
+ 2048 is more than needed for a max rle of 1640 on the next incoming character */
+ if((devc->cbuf_wrptr +2048) > devc->sample_buf_size){
+ sr_spew("Drain large buff %d %d\n\r",devc->cbuf_wrptr,devc->sample_buf_size);
+ process_group(sdi, devc, devc->cbuf_wrptr);
+
+ }
+ }/* While another slice or RLE available */
+ if (devc->cbuf_wrptr){
+ process_group(sdi, devc, devc->cbuf_wrptr);
+ }
+
+}
+
+/* Send the processed analog values to the session */
+int send_analog(struct sr_dev_inst *sdi, struct dev_context *devc,
+ uint32_t num_samples, uint32_t offset)
+{
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog;
+ struct sr_analog_encoding encoding;
+ struct sr_analog_meaning meaning;
+ struct sr_analog_spec spec;
+ struct sr_channel *ch;
+ uint32_t i;
+ float *fptr;
+
+ sr_analog_init(&analog, &encoding, &meaning, &spec, ANALOG_DIGITS);
+ for (i = 0; i < devc->num_a_channels; i++) {
+ if ((devc->a_chan_mask >> i) & 1) {
+ ch = devc->analog_groups[i]->channels->data;
+ analog.meaning->channels =
+ g_slist_append(NULL, ch);
+ analog.num_samples = num_samples;
+ analog.data = (devc->a_data_bufs[i]) + offset;
+ fptr = analog.data;
+ sr_spew
+ ("send analog num %d offset %d first %f 2 %f",
+ num_samples, offset, *(devc->a_data_bufs[i]),
+ *fptr);
+ analog.meaning->mq = SR_MQ_VOLTAGE;
+ analog.meaning->unit = SR_UNIT_VOLT;
+ analog.meaning->mqflags = 0;
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ sr_session_send(sdi, &packet);
+ g_slist_free(analog.meaning->channels);
+ }/* if enabled */
+ }/* for channels */
+ return 0;
+
+}
+
+/*Send the ring buffer of pre-trigger analog samples.
+ The entire buffer is sent (as long as it filled once), but need send two payloads split at the
+ the writeptr */
+int send_analog_ring(struct sr_dev_inst *sdi, struct dev_context *devc,
+ uint32_t num_samples)
+{
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog;
+ struct sr_analog_encoding encoding;
+ struct sr_analog_meaning meaning;
+ struct sr_analog_spec spec;
+ struct sr_channel *ch;
+ int i;
+ uint32_t num_pre, start_pre;
+ uint32_t num_post, start_post;
+ num_pre =
+ (num_samples >=
+ devc->pretrig_wr_ptr) ? devc->pretrig_wr_ptr : num_samples;
+ start_pre = devc->pretrig_wr_ptr - num_pre;
+ num_post = num_samples - num_pre;
+ start_post = devc->pretrig_entries - num_post;
+ sr_spew
+ ("send_analog ring wrptr %u ns %d npre %u spre %u npost %u spost %u",
+ devc->pretrig_wr_ptr, num_samples, num_pre, start_pre,
+ num_post, start_post);
+ float *fptr;
+ sr_analog_init(&analog, &encoding, &meaning, &spec, ANALOG_DIGITS);
+ for (i = 0; i < devc->num_a_channels; i++) {
+ if ((devc->a_chan_mask >> i) & 1) {
+ ch = devc->analog_groups[i]->channels->data;
+ analog.meaning->channels =
+ g_slist_append(NULL, ch);
+ analog.meaning->mq = SR_MQ_VOLTAGE;
+ analog.meaning->unit = SR_UNIT_VOLT;
+ analog.meaning->mqflags = 0;
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ /*First send what is after the write pointer because it is oldest */
+ if (num_post) {
+ analog.num_samples = num_post;
+ analog.data =
+ (devc->a_pretrig_bufs[i]) + start_post;
+ for (uint32_t j = 0;
+ j < analog.num_samples; j++) {
+ fptr =
+ analog.data +
+ (j * sizeof(float));
+ }
+ sr_session_send(sdi, &packet);
+ }
+ if (num_pre) {
+ analog.num_samples = num_pre;
+ analog.data =
+ (devc->a_pretrig_bufs[i]) + start_pre;
+ sr_dbg("Sending A%d ring buffer newest ",
+ i);
+ for (uint32_t j = 0;
+ j < analog.num_samples; j++) {
+ fptr =
+ analog.data +
+ (j * sizeof(float));
+ sr_spew("RNGDCW%d j %d %f %p", i,
+ j, *fptr, (void *) fptr);
+ }
+ sr_session_send(sdi, &packet);
+ }
+ g_slist_free(analog.meaning->channels);
+ sr_dbg("Sending A%d ring buffer done ", i);
+ }/*if enabled */
+ }/* for channels */
+ return 0;
- (void)fd;
+}
+
+/* Given a chunk of slices forward to trigger check or session as appropriate and update state
+ these could be real slices or those generated by rles */
+int process_group(struct sr_dev_inst *sdi, struct dev_context *devc,
+ uint32_t num_slices)
+{
+ int trigger_offset;
+ int pre_trigger_samples;
+ /* These are samples sent to session and are less than num_slices if we reach limit_samples */
+ size_t num_samples;
+ struct sr_datafeed_logic logic;
+ struct sr_datafeed_packet packet;
+ int i;
+ size_t cbuf_wrptr_cpy;
+ cbuf_wrptr_cpy = devc->cbuf_wrptr;
+ /*regardless of whether we forward samples on or not (because we aren't triggered), always reset the
+ pointer into the device data buffers */
+ devc->cbuf_wrptr = 0;
+ if (devc->trigger_fired) { /*send directly to session */
+ if (devc->limit_samples &&
+ num_slices >
+ devc->limit_samples - devc->sent_samples) {
+ num_samples =
+ devc->limit_samples - devc->sent_samples;
+ } else {
+ num_samples = num_slices;
+ }
+ if (num_samples > 0) {
+ sr_spew("Process_group sending %lu post trig samples dsb %d",
+ num_samples, devc->dig_sample_bytes);
+ if (devc->num_d_channels) {
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ /* The number of bytes required to fit all of the channels */
+ logic.unitsize = devc->dig_sample_bytes;
+ /* The total length of the array sent */
+ logic.length = num_samples * logic.unitsize;
+ logic.data = devc->d_data_buf;
+ sr_session_send(sdi, &packet);
+ }
+ send_analog(sdi, devc, num_samples, 0);
+ }
+
+ devc->sent_samples += num_samples;
+ return 0;
+
+ } else {
+ /* Trigger_fired */
+ size_t num_ring_samples;
+ size_t sptr, eptr;
+ size_t numtail, numwrap;
+ size_t srcptr;
+ /* The trigger_offset is -1 if no trigger is found, but if a trigger is
+ * found then trigger_offset is the offset into the data buffer sent to
+ * it. The pre_trigger_samples is the total number of samples before
+ * the trigger, but limited to the size of the ring buffer set by the
+ * capture_ratio. So the pre_trigger_samples can include both the new
+ * samples and the ring buffer, but trigger_offset is only in relation
+ * to the new samples */
+ trigger_offset = soft_trigger_logic_check(devc->stl, devc->d_data_buf,
+ num_slices * devc->dig_sample_bytes, &pre_trigger_samples);
+
+ /* A trigger offset >=0 indicates a trigger was seen. The stl will issue
+ * the trigger to the session and will forward all pre trigger logic
+ * samples, but we must send any post trigger logic and all pre and post
+ * trigger analog signals */
+ if (trigger_offset > -1) {
+ devc->trigger_fired = TRUE;
+ devc->sent_samples += pre_trigger_samples;
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ num_samples = num_slices - trigger_offset;
+
+ /* Since we are in continuous mode for SW triggers it is possible to
+ * get more samples than limit_samples, so once the trigger fires,
+ * make sure we don't get beyond limit samples. At this point
+ * sent_samples should be equal to pre_trigger_samples (just added
+ * above) because without being triggered we'd never increment
+ * sent_samples.
+ * This number is the number of post trigger logic samples to send
+ * to the session, the number of floats is larger because of the
+ * analog ring buffer we track. */
+ if (devc->limit_samples && \
+ (num_samples > devc->limit_samples - devc->sent_samples))
+ num_samples = devc->limit_samples - devc->sent_samples;
+
+ /* The soft trigger logic issues the trigger and sends packets for
+ * all logic data that was pretrigger so only send what is left */
+ if (num_samples > 0) {
+ sr_dbg("Sending post trigger logical remainder of %lu",
+ num_samples);
+ logic.length = num_samples * devc->dig_sample_bytes;
+ logic.unitsize = devc->dig_sample_bytes;
+ logic.data = devc->d_data_buf +
+ (trigger_offset * devc->dig_sample_bytes);
+ devc->sent_samples += num_samples;
+ sr_session_send(sdi, &packet);
+ }
+
+ size_t new_start, new_end, new_samples, ring_samples;
+ /* Figure out the analog data to send. We might need to send:
+ * -some or all of incoming data
+ * -all of incoming data and some of ring buffer
+ * -all of incoming data and all of ring buffer (and still might be
+ * short)
+ * We don't need to compare to limit_samples because pretrig_entries
+ * can never be more than limit_samples trigger offset indicatese
+ * where in the new samples the trigger was, but we need to go back
+ * pretrig_entries before it */
+ new_start = (trigger_offset > (int)devc->pretrig_entries) ?
+ trigger_offset - devc->pretrig_entries : 0;
+
+ /* Note that we might not have gotten all the pre triggerstore data
+ * we were looking for. In such a case the sw trigger logic seems to
+ * fill up to the limit_samples and thus the ratio is off, but we
+ * get the full number of samples.
+ * The number of entries in the ring buffer is
+ * pre_trigger_samples-trigger_offset so subtract that from limit
+ * samples as a threshold */
+ new_end = MIN(num_slices - 1,
+ devc->limit_samples - (pre_trigger_samples - trigger_offset) - 1);
+
+ /* This includes pre and post trigger storage. */
+ new_samples = new_end - new_start + 1;
+
+ /* pre_trigger_samples can never be greater than trigger_offset by
+ * more than the ring buffer depth (pretrig entries) */
+ ring_samples = (pre_trigger_samples > trigger_offset) ?
+ pre_trigger_samples - trigger_offset : 0;
+ sr_spew("SW trigger float info newstart %zu new_end %zu " \
+ "new_samp %zu ring_samp %zu",
+ new_start, new_end, new_samples, ring_samples);
+
+ if (ring_samples > 0)
+ send_analog_ring(sdi, devc, ring_samples);
+ if (new_samples)
+ send_analog(sdi, devc, new_samples, new_start);
+ } else {
+ /* We didn't trigger but need to copy to ring buffer */
+ if ((devc->a_chan_mask) && (devc->pretrig_entries)) {
+ /*The incoming data buffer could be much larger than the ring
+ * buffer, so never copy more than the size of the ring buffer */
+ num_ring_samples = num_slices > devc->pretrig_entries ?
+ devc->pretrig_entries : num_slices;
+ sptr = devc->pretrig_wr_ptr; /* Starting pointer to copy to */
+
+ /* endptr can't go past the end */
+ eptr = (sptr + num_ring_samples) >= devc-> pretrig_entries ?
+ devc->pretrig_entries - 1 : sptr + num_ring_samples - 1;
+
+ /* Number of samples to copy to the tail of ring buffer without
+ * wrapping */
+ numtail = (eptr - sptr) + 1;
+
+ numwrap = (num_ring_samples > numtail) ?
+ num_ring_samples - numtail : 0;
+
+ /* cbuf_wrptr points to where the next write should go,
+ * not the actual write data */
+ srcptr = cbuf_wrptr_cpy - num_ring_samples;
+ sr_spew("RNG num %zu sptr %zu eptr %zu ",
+ num_ring_samples, sptr, eptr);
+
+ /* Copy tail */
+ for (i = 0; i < devc->num_a_channels; i++)
+ if ((devc->a_chan_mask >> i) & 1)
+ for (uint32_t j = 0; j < numtail; j++)
+ devc->a_pretrig_bufs[i][sptr + j] =
+ devc->a_data_bufs[i][srcptr + j];
+
+ /* Copy wrap */
+ srcptr += numtail;
+ for (i = 0; i < devc->num_a_channels; i++)
+ if ((devc->a_chan_mask >> i) & 1)
+ for (uint32_t j = 0; j < numwrap; j++)
+ devc->a_pretrig_bufs[i][j] =
+ devc->a_data_bufs[i][srcptr + j];
+
+ devc->pretrig_wr_ptr = (numwrap) ?
+ numwrap : (eptr + 1) % devc->pretrig_entries;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/* Duplicate previous sample values
+ * This function relies on the caller to ensure d_data_buf has samples to handle
+ * the full value of the rle */
+void rle_memset(struct dev_context *devc, uint32_t num_slices)
+{
+ uint32_t j, k, didx;
+ sr_spew("rle_memset vals 0x%X, 0x%X, 0x%X slices %d dsb %d",
+ devc->d_last[0], devc->d_last[1], devc->d_last[2],
+ num_slices, devc->dig_sample_bytes);
+
+ /* Even if a channel is disabled, PV expects the same location and size for
+ * the enabled channels as if the channel were enabled. */
+ for (j = 0; j < num_slices; j++) {
+ didx = devc->cbuf_wrptr * devc->dig_sample_bytes;
+ for (k = 0; k < devc->dig_sample_bytes; k++)
+ devc->d_data_buf[didx + k] = devc->d_last[k];
+ /* cbuf_wrptr always counts slices/samples (and not the bytes in the
+ * buffer) regardless of mode */
+ devc->cbuf_wrptr++;
+ }
+}
+
+/* This callback function is mapped from api.c with serial_source_add and is
+ * created after a capture has been setup and is responsible for querying the
+ * device trigger status, downloading data and forwarding packets */
+SR_PRIV int raspberrypi_pico_receive(int fd, int revents, void *cb_data)
+{
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+ int len;
+ uint32_t i, bytes_rem, residual_bytes;
+ (void) fd;
if (!(sdi = cb_data))
return TRUE;
if (!(devc = sdi->priv))
return TRUE;
- if (revents == G_IO_IN) {
- /* TODO */
+ if (devc->rxstate != RX_ACTIVE) {
+ /* This condition is normal operation and expected to happen
+ * but printed as information */
+ sr_dbg("Reached non active state in receive %d", devc->rxstate);
+ /* Don't return - we may be waiting for a final bytecnt */
+ }
+
+ if (devc->rxstate == RX_IDLE) {
+ /* This is the normal end condition where we do one more receive
+ * to make sure we get the full byte_cnt */
+ sr_dbg("Reached idle state in receive %d", devc->rxstate);
+ return FALSE;
}
+ serial = sdi->conn;
+
+ /* Return true if it is some kind of event we don't handle */
+ if (!(revents == G_IO_IN || revents == 0))
+ return TRUE;
+
+ /* Fill the buffer, note the end may have partial slices */
+ bytes_rem = devc->serial_buffer_size - devc->wrptr;
+
+ /* Read one byte less so that we can null it and print as a string. Do a
+ * small 10ms timeout, if we get nothing, we'll always come back again */
+ len = serial_read_blocking(serial, &(devc->buffer[devc->wrptr]),
+ bytes_rem - 1, 10);
+ sr_spew("Entry wrptr %u bytes_rem %u len %d", devc->wrptr, bytes_rem, len);
+
+ if (len > 0) {
+ devc->buffer[devc->wrptr + len] = 0;
+ /* Add the "#" so that spaces in the string are clearly seen */
+ sr_dbg("rx string %s#", devc->buffer);
+ devc->bytes_avail = (devc->wrptr + len);
+ sr_spew("rx len %d bytes_avail %ul sent_samples %ul wrptr %u",
+ len, devc->bytes_avail, devc->sent_samples, devc->wrptr);
+ } else {
+ if (len == 0) {
+ return TRUE;
+ } else {
+ sr_err("ERROR: Negative serial read code %d", len);
+ sdi->driver->dev_acquisition_stop(sdi);
+ return FALSE;
+ }
+ }
+
+ /* Process the serial read data */
+ devc->ser_rdptr = 0;
+ if (devc->rxstate == RX_ACTIVE) {
+ if ((devc->a_chan_mask == 0) \
+ && ((devc->d_chan_mask & 0xFFFFFFF0) == 0))
+ process_D4(sdi, devc);
+ else
+ process_slice(sdi, devc);
+ }
+
+ /* process_slice/process_D4 increment ser_rdptr as bytes of the serial
+ * buffer are used. But they may not use all of it, and thus the residual
+ * unused bytes are shifted to the start of the buffer for the next call. */
+ residual_bytes = devc->bytes_avail - devc->ser_rdptr;
+ if (residual_bytes) {
+ for (i = 0; i < residual_bytes; i++)
+ devc->buffer[i] = devc->buffer[i + devc->ser_rdptr];
+
+ devc->ser_rdptr = 0;
+ devc->wrptr = residual_bytes;
+ sr_spew("Residual shift rdptr %u wrptr %u", devc->ser_rdptr, devc->wrptr);
+ } else {
+ /* If there are no residuals shifted then zero the wrptr since all data
+ * is used */
+ devc->wrptr = 0;
+ }
+
+ /* ABORT ends immediately */
+ if (devc->rxstate == RX_ABORT) {
+ sr_err("Ending receive on abort");
+ sdi->driver->dev_acquisition_stop(sdi);
+ return FALSE;
+ }
+
+ /* If stopped, look for final '+' indicating the full byte_cnt is received */
+ if (devc->rxstate == RX_STOPPED) {
+ sr_dbg("Stopped, checking byte_cnt");
+ if (devc->buffer[0] != '$') {
+ /* If this happens it means that we got a set of data that was not
+ * processed as whole groups of slice bytes. So either we lost data
+ * or are not parsing it correctly. */
+ sr_err("ERROR: Stop marker should be byte zero");
+ devc->rxstate = RX_ABORT;
+ sdi->driver->dev_acquisition_stop(sdi);
+ return FALSE;
+ }
+
+ for (i = 1; i < devc->wrptr; i++) {
+ if (devc->buffer[i] == '+') {
+ devc->buffer[i] = 0;
+ uint64_t rxbytecnt;
+ rxbytecnt = atol((char*)&(devc->buffer[1]));
+ sr_dbg("Byte_cnt check device cnt %lu host cnt %lu",
+ rxbytecnt, devc->byte_cnt);
+ if (rxbytecnt != devc->byte_cnt)
+ sr_err("ERROR: received %lu and counted %lu bytecnts " \
+ "don't match, data may be lost",
+ rxbytecnt, devc->byte_cnt);
+
+ /* Since we got the bytecnt we know the device is done
+ * sending data */
+ devc->rxstate = RX_IDLE;
+
+ /* We must always call acquisition_stop on all completed runs */
+ sdi->driver->dev_acquisition_stop(sdi);
+ return TRUE;
+ }
+ }
+
+ /*It's possible we need one more serial transfer to get the byte_cnt,
+ * so print that here */
+ sr_dbg("Haven't seen byte_cnt + yet");
+ }
+ /* If at the sample limit, send a "+" in case we are in continuous mode and
+ * need to stop the device. Not that even in non continous mode there might
+ * be cases where get an extra sample or two... */
+
+ if ((devc->sent_samples >= devc->limit_samples) \
+ && (devc->rxstate == RX_ACTIVE)) {
+ sr_dbg("Ending: sent %u of limit %lu samples byte_cnt %lu",
+ devc->sent_samples, devc->limit_samples, devc->byte_cnt);
+ send_serial_char(serial, '+');
+ }
+
+ sr_spew("Receive function done: sent %u limit %lu wrptr %u len %d",
+ devc->sent_samples, devc->limit_samples, devc->wrptr, len);
+
return TRUE;
}
+
+/* Read device specific information from the device */
+SR_PRIV int raspberrypi_pico_get_dev_cfg(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+ char *cmd, response[20];
+ gchar **tokens;
+ unsigned int i;
+ int ret, num_tokens;
+
+ devc = sdi->priv;
+ sr_dbg("At get_dev_cfg");
+ serial = sdi->conn;
+ for (i = 0; i < devc->num_a_channels; i++) {
+ cmd = g_strdup_printf("a%d\n", i);
+ ret = send_serial_w_resp(serial, cmd, response, 20);
+ if (ret <= 0) {
+ sr_err("ERROR: No response from device for analog channel query");
+ return SR_ERR;
+ }
+ response[ret] = 0;
+ tokens = NULL;
+ tokens = g_strsplit(response, "x", 0);
+ num_tokens = g_strv_length(tokens);
+
+ if (num_tokens == 2) {
+ devc->a_scale[i] = ((float) atoi(tokens[0])) / 1000000.0;
+ devc->a_offset[i] = ((float) atoi(tokens[1])) / 1000000.0;
+ sr_dbg("A%d scale %f offset %f response #%s# tokens #%s# #%s#",
+ i, devc->a_scale[i], devc->a_offset[i],
+ response, tokens[0], tokens[1]);
+ } else {
+ sr_err("ERROR: Ascale read c%d got unparseable response %s tokens %d",
+ i, response, num_tokens);
+ /* Force a legal fixed value assuming a 3.3V scale */
+ devc->a_scale[i] = 0.0257;
+ devc->a_offset[i] = 0.0;
+ }
+
+ g_strfreev(tokens);
+ g_free(cmd);
+ }
+
+ return SR_OK;
+}
projects / libsigrok.git / blobdiff