--- /dev/null
+/*
+ * This file is part of the libsigrok project.
+ *
+ * Copyright (C) 2019 Vitaliy Vorobyov
+ *
+ * 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <string.h>
+#include "protocol.h"
+#include "sla5032.h"
+
+/* Callback handling data */
+static int la_prepare_data(int fd, int revents, void *cb_data)
+{
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ struct sr_usb_dev_inst *usb;
+ int i, j, ret, xfer_len;
+ uint8_t *rle_buf, *samples;
+ const uint8_t *p, *q;
+ uint16_t rle_count;
+ int samples_count, rle_samples_count;
+ uint32_t status[3];
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_logic logic;
+ uint32_t value;
+ int trigger_offset;
+
+ enum {
+ RLE_SAMPLE_SIZE = sizeof(uint32_t) + sizeof(uint16_t),
+ RLE_SAMPLES_COUNT = 0x100000,
+ RLE_BUF_SIZE = RLE_SAMPLES_COUNT * RLE_SAMPLE_SIZE,
+ RLE_END_MARKER = 0xFFFF,
+ };
+
+ (void)fd;
+ (void)revents;
+
+ sdi = cb_data;
+ devc = sdi->priv;
+ usb = sdi->conn;
+
+ memset(status, 0, sizeof(status));
+ ret = sla5032_get_status(usb, status);
+ if (ret != SR_OK) {
+ sla5032_write_reg14_zero(usb);
+ sr_dev_acquisition_stop(sdi);
+ return G_SOURCE_CONTINUE;
+ }
+
+ /* data not ready (acquision in progress) */
+ if (status[1] != 3)
+ return G_SOURCE_CONTINUE;
+
+ sr_dbg("acquision done, status: %u.", (unsigned int)status[2]);
+
+ /* data ready (download, decode and send to sigrok) */
+ ret = sla5032_set_read_back(usb);
+ if (ret != SR_OK) {
+ sla5032_write_reg14_zero(usb);
+ sr_dev_acquisition_stop(sdi);
+ return G_SOURCE_CONTINUE;
+ }
+
+ rle_buf = g_try_malloc(RLE_BUF_SIZE);
+ if (rle_buf == NULL) {
+ sla5032_write_reg14_zero(usb);
+ sr_dev_acquisition_stop(sdi);
+ return G_SOURCE_CONTINUE;
+ }
+
+ do {
+ xfer_len = 0;
+ ret = sla5032_read_data_chunk(usb, rle_buf, RLE_BUF_SIZE, &xfer_len);
+ if (ret != SR_OK) {
+ sla5032_write_reg14_zero(usb);
+ g_free(rle_buf);
+ sr_dev_acquisition_stop(sdi);
+
+ sr_dbg("acquision done, ret: %d.", ret);
+ return G_SOURCE_CONTINUE;
+ }
+
+ sr_dbg("acquision done, xfer_len: %d.", xfer_len);
+
+ if (xfer_len == 0) {
+ sla5032_write_reg14_zero(usb);
+ g_free(rle_buf);
+ sr_dev_acquisition_stop(sdi);
+ return G_SOURCE_CONTINUE;
+ }
+
+ p = rle_buf;
+ samples_count = 0;
+ rle_samples_count = xfer_len / RLE_SAMPLE_SIZE;
+
+ sr_dbg("acquision done, rle_samples_count: %d.", rle_samples_count);
+
+ for (i = 0; i < rle_samples_count; i++) {
+ p += sizeof(uint32_t); /* skip sample value */
+
+ rle_count = RL16(p); /* read RLE counter */
+ p += sizeof(uint16_t);
+ if (rle_count == RLE_END_MARKER) {
+ rle_samples_count = i;
+ break;
+ }
+ samples_count += rle_count + 1;
+ }
+ sr_dbg("acquision done, samples_count: %d.", samples_count);
+
+ if (samples_count == 0) {
+ sr_dbg("acquision done, no samples.");
+ sla5032_write_reg14_zero(usb);
+ g_free(rle_buf);
+ sr_dev_acquisition_stop(sdi);
+ return G_SOURCE_CONTINUE;
+ }
+
+ /* Decode RLE */
+ samples = g_try_malloc(samples_count * sizeof(uint32_t));
+ if (!samples) {
+ sr_dbg("memory allocation error.");
+ sla5032_write_reg14_zero(usb);
+ g_free(rle_buf);
+ sr_dev_acquisition_stop(sdi);
+ return G_SOURCE_CONTINUE;
+ }
+
+ p = rle_buf;
+ q = samples;
+ for (i = 0; i < rle_samples_count; i++) {
+ value = RL32(p);
+ p += sizeof(uint32_t); /* read sample value */
+
+ rle_count = RL16(p); /* read RLE counter */
+ p += sizeof(uint16_t);
+
+ if (rle_count == RLE_END_MARKER) {
+ sr_dbg("RLE end marker found.");
+ break;
+ }
+
+ for (j = 0; j <= rle_count; j++) {
+ WL32(q, value);
+ q += sizeof(uint32_t);
+ }
+ }
+
+ if (devc->trigger_fired) {
+ /* Send the incoming transfer to the session bus. */
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+
+ logic.length = samples_count * sizeof(uint32_t);
+ logic.unitsize = sizeof(uint32_t);
+ logic.data = samples;
+ sr_session_send(sdi, &packet);
+ } else {
+ trigger_offset = soft_trigger_logic_check(devc->stl,
+ samples, samples_count * sizeof(uint32_t), NULL);
+ if (trigger_offset > -1) {
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ int num_samples = samples_count - trigger_offset;
+
+ logic.length = num_samples * sizeof(uint32_t);
+ logic.unitsize = sizeof(uint32_t);
+ logic.data = samples + trigger_offset * sizeof(uint32_t);
+ sr_session_send(sdi, &packet);
+
+ devc->trigger_fired = TRUE;
+ }
+ }
+
+ g_free(samples);
+ } while (rle_samples_count == RLE_SAMPLES_COUNT);
+
+ sr_dbg("acquision stop, rle_samples_count < RLE_SAMPLES_COUNT.");
+
+ sla5032_write_reg14_zero(usb);
+
+ sr_dev_acquisition_stop(sdi); /* if all data transfered */
+
+ g_free(rle_buf);
+
+ if (devc->stl) {
+ soft_trigger_logic_free(devc->stl);
+ devc->stl = NULL;
+ }
+
+ return G_SOURCE_CONTINUE;
+}
+
+SR_PRIV int la_start_acquisition(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ struct sr_usb_dev_inst *usb;
+ struct sr_trigger* trigger;
+ int ret;
+ enum { poll_interval_ms = 100 };
+ uint64_t pre, post;
+
+ devc = sdi->priv;
+ usb = sdi->conn;
+
+ if (devc->state != STATE_IDLE) {
+ sr_err("Not in idle state, cannot start acquisition.");
+ return SR_ERR;
+ }
+
+ pre = (devc->limit_samples * devc->capture_ratio) / 100;
+ post = devc->limit_samples - pre;
+
+ if ((trigger = sr_session_trigger_get(sdi->session))) {
+ devc->stl = soft_trigger_logic_new(sdi, trigger, pre);
+ if (!devc->stl) {
+ sr_err("stl alloc error.");
+ return SR_ERR_MALLOC;
+ }
+ devc->trigger_fired = FALSE;
+ }
+ else
+ devc->trigger_fired = TRUE;
+
+ sr_dbg("start acquision, smp lim: %" PRIu64 ", cap ratio: %" PRIu64
+ ".", devc->limit_samples, devc->capture_ratio);
+
+ sr_dbg("start acquision, pre: %" PRIu64 ", post: %" PRIu64 ".", pre, post);
+ pre /= 256;
+ pre = max(pre, 2);
+ pre--;
+
+ post /= 256;
+ post = max(post, 2);
+ post--;
+
+ sr_dbg("start acquision, pre: %" PRIx64 ", post: %" PRIx64 ".", pre, post);
+
+ /* (x + 1) * 256 (samples) pre, post */
+ ret = sla5032_set_depth(usb, pre, post);
+ if (ret != SR_OK)
+ return ret;
+
+ ret = sla5032_set_triggers(usb, devc->trigger_values, devc->trigger_edge_mask, devc->trigger_mask);
+ if (ret != SR_OK)
+ return ret;
+
+ ret = sla5032_set_samplerate(usb, devc->samplerate);
+ if (ret != SR_OK)
+ return ret;
+
+ /* TODO: make PWM generator as separate configurable subdevice */
+ enum {
+ pwm1_hi = 20000000 - 1,
+ pwm1_lo = 200000 - 1,
+ pwm2_hi = 15 - 1,
+ pwm2_lo = 5 - 1,
+ };
+
+ ret = sla5032_set_pwm1(usb, pwm1_hi, pwm1_lo);
+ if (ret != SR_OK)
+ return ret;
+
+ ret = sla5032_set_pwm2(usb, pwm2_hi, pwm2_lo);
+ if (ret != SR_OK)
+ return ret;
+
+ ret = sla5032_start_sample(usb);
+ if (ret != SR_OK)
+ return ret;
+
+ sr_session_source_add(sdi->session, -1, 0, poll_interval_ms,
+ la_prepare_data, (struct sr_dev_inst *)sdi);
+
+ std_session_send_df_header(sdi);
+
+ return ret;
+}
projects / libsigrok.git / blobdiff