+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2013 Bert Vermeulen <bert@biot.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
- * 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 "protocol.h"
-#include <libserialport.h>
-
-extern SR_PRIV struct sr_dev_driver ols_driver_info;
-static struct sr_dev_driver *di = &ols_driver_info;
-
-SR_PRIV int send_shortcommand(struct sr_serial_dev_inst *serial,
- uint8_t command)
-{
- char buf[1];
-
- sr_dbg("Sending cmd 0x%.2x.", command);
- buf[0] = command;
- if (serial_write_blocking(serial, buf, 1) != 1)
- return SR_ERR;
-
- return SR_OK;
-}
-
-SR_PRIV int send_longcommand(struct sr_serial_dev_inst *serial,
- uint8_t command, uint8_t *data)
-{
- char buf[5];
-
- sr_dbg("Sending cmd 0x%.2x data 0x%.2x%.2x%.2x%.2x.", command,
- data[0], data[1], data[2], data[3]);
- buf[0] = command;
- buf[1] = data[0];
- buf[2] = data[1];
- buf[3] = data[2];
- buf[4] = data[3];
- if (serial_write_blocking(serial, buf, 5) != 5)
- return SR_ERR;
-
- return SR_OK;
-}
-
-/* Configures the channel mask based on which channels are enabled. */
-SR_PRIV void ols_channel_mask(const struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- struct sr_channel *channel;
- const GSList *l;
-
- devc = sdi->priv;
-
- devc->channel_mask = 0;
- for (l = sdi->channels; l; l = l->next) {
- channel = l->data;
- if (channel->enabled)
- devc->channel_mask |= 1 << channel->index;
- }
-}
-
-SR_PRIV int ols_convert_trigger(const struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- struct sr_trigger *trigger;
- struct sr_trigger_stage *stage;
- struct sr_trigger_match *match;
- const GSList *l, *m;
- int i;
-
- devc = sdi->priv;
-
- devc->num_stages = 0;
- for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
- devc->trigger_mask[i] = 0;
- devc->trigger_value[i] = 0;
- }
-
- if (!(trigger = sr_session_trigger_get(sdi->session)))
- return SR_OK;
-
- devc->num_stages = g_slist_length(trigger->stages);
- if (devc->num_stages > NUM_TRIGGER_STAGES) {
- sr_err("This device only supports %d trigger stages.",
- NUM_TRIGGER_STAGES);
- return SR_ERR;
- }
-
- for (l = trigger->stages; l; l = l->next) {
- stage = l->data;
- for (m = stage->matches; m; m = m->next) {
- match = m->data;
- if (!match->channel->enabled)
- /* Ignore disabled channels with a trigger. */
- continue;
- devc->trigger_mask[stage->stage] |= 1 << match->channel->index;
- if (match->match == SR_TRIGGER_ONE)
- devc->trigger_value[stage->stage] |= 1 << match->channel->index;
- }
- }
-
- return SR_OK;
-}
-
-SR_PRIV struct dev_context *ols_dev_new(void)
-{
- struct dev_context *devc;
-
- if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
- sr_err("Device context malloc failed.");
- return NULL;
- }
-
- /* Device-specific settings */
- devc->max_samples = devc->max_samplerate = devc->protocol_version = 0;
-
- /* Acquisition settings */
- devc->limit_samples = devc->capture_ratio = 0;
- devc->trigger_at = -1;
- devc->channel_mask = 0xffffffff;
- devc->flag_reg = 0;
-
- return devc;
-}
-
-SR_PRIV struct sr_dev_inst *get_metadata(struct sr_serial_dev_inst *serial)
-{
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- struct sr_channel *ch;
- uint32_t tmp_int, ui;
- uint8_t key, type, token;
- GString *tmp_str, *devname, *version;
- guchar tmp_c;
-
- sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, NULL, NULL, NULL);
- sdi->driver = di;
- devc = ols_dev_new();
- sdi->priv = devc;
-
- devname = g_string_new("");
- version = g_string_new("");
-
- key = 0xff;
- while (key) {
- if (serial_read_blocking(serial, &key, 1) != 1)
- break;
- if (key == 0x00) {
- sr_dbg("Got metadata key 0x00, metadata ends.");
- break;
- }
- type = key >> 5;
- token = key & 0x1f;
- switch (type) {
- case 0:
- /* NULL-terminated string */
- tmp_str = g_string_new("");
- while (serial_read_blocking(serial, &tmp_c, 1) == 1 && tmp_c != '\0')
- g_string_append_c(tmp_str, tmp_c);
- sr_dbg("Got metadata key 0x%.2x value '%s'.",
- key, tmp_str->str);
- switch (token) {
- case 0x01:
- /* Device name */
- devname = g_string_append(devname, tmp_str->str);
- break;
- case 0x02:
- /* FPGA firmware version */
- if (version->len)
- g_string_append(version, ", ");
- g_string_append(version, "FPGA version ");
- g_string_append(version, tmp_str->str);
- break;
- case 0x03:
- /* Ancillary version */
- if (version->len)
- g_string_append(version, ", ");
- g_string_append(version, "Ancillary version ");
- g_string_append(version, tmp_str->str);
- break;
- default:
- sr_info("ols: unknown token 0x%.2x: '%s'",
- token, tmp_str->str);
- break;
- }
- g_string_free(tmp_str, TRUE);
- break;
- case 1:
- /* 32-bit unsigned integer */
- if (serial_read_blocking(serial, &tmp_int, 4) != 4)
- break;
- tmp_int = RB32(&tmp_int);
- sr_dbg("Got metadata key 0x%.2x value 0x%.8x.",
- key, tmp_int);
- switch (token) {
- case 0x00:
- /* Number of usable channels */
- for (ui = 0; ui < tmp_int; ui++) {
- if (!(ch = sr_channel_new(ui, SR_CHANNEL_LOGIC, TRUE,
- ols_channel_names[ui])))
- return 0;
- sdi->channels = g_slist_append(sdi->channels, ch);
- }
- break;
- case 0x01:
- /* Amount of sample memory available (bytes) */
- devc->max_samples = tmp_int;
- break;
- case 0x02:
- /* Amount of dynamic memory available (bytes) */
- /* what is this for? */
- break;
- case 0x03:
- /* Maximum sample rate (hz) */
- devc->max_samplerate = tmp_int;
- break;
- case 0x04:
- /* protocol version */
- devc->protocol_version = tmp_int;
- break;
- default:
- sr_info("Unknown token 0x%.2x: 0x%.8x.",
- token, tmp_int);
- break;
- }
- break;
- case 2:
- /* 8-bit unsigned integer */
- if (serial_read_blocking(serial, &tmp_c, 1) != 1)
- break;
- sr_dbg("Got metadata key 0x%.2x value 0x%.2x.",
- key, tmp_c);
- switch (token) {
- case 0x00:
- /* Number of usable channels */
- for (ui = 0; ui < tmp_c; ui++) {
- if (!(ch = sr_channel_new(ui, SR_CHANNEL_LOGIC, TRUE,
- ols_channel_names[ui])))
- return 0;
- sdi->channels = g_slist_append(sdi->channels, ch);
- }
- break;
- case 0x01:
- /* protocol version */
- devc->protocol_version = tmp_c;
- break;
- default:
- sr_info("Unknown token 0x%.2x: 0x%.2x.",
- token, tmp_c);
- break;
- }
- break;
- default:
- /* unknown type */
- break;
- }
- }
-
- sdi->model = devname->str;
- sdi->version = version->str;
- g_string_free(devname, FALSE);
- g_string_free(version, FALSE);
-
- return sdi;
-}
-
-SR_PRIV int ols_set_samplerate(const struct sr_dev_inst *sdi,
- const uint64_t samplerate)
-{
- struct dev_context *devc;
-
- devc = sdi->priv;
- if (devc->max_samplerate && samplerate > devc->max_samplerate)
- return SR_ERR_SAMPLERATE;
-
- if (samplerate > CLOCK_RATE) {
- sr_info("Enabling demux mode.");
- devc->flag_reg |= FLAG_DEMUX;
- devc->flag_reg &= ~FLAG_FILTER;
- devc->max_channels = NUM_CHANNELS / 2;
- devc->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1;
- } else {
- sr_info("Disabling demux mode.");
- devc->flag_reg &= ~FLAG_DEMUX;
- devc->flag_reg |= FLAG_FILTER;
- devc->max_channels = NUM_CHANNELS;
- devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1;
- }
-
- /* Calculate actual samplerate used and complain if it is different
- * from the requested.
- */
- devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1);
- if (devc->flag_reg & FLAG_DEMUX)
- devc->cur_samplerate *= 2;
- if (devc->cur_samplerate != samplerate)
- sr_info("Can't match samplerate %" PRIu64 ", using %"
- PRIu64 ".", samplerate, devc->cur_samplerate);
-
- return SR_OK;
-}
-
-SR_PRIV void abort_acquisition(const struct sr_dev_inst *sdi)
-{
- struct sr_datafeed_packet packet;
- struct sr_serial_dev_inst *serial;
-
- serial = sdi->conn;
- serial_source_remove(sdi->session, serial);
-
- /* Terminate session */
- packet.type = SR_DF_END;
- sr_session_send(sdi, &packet);
-}
-
-SR_PRIV int ols_receive_data(int fd, int revents, void *cb_data)
-{
- struct dev_context *devc;
- struct sr_dev_inst *sdi;
- struct sr_serial_dev_inst *serial;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_logic logic;
- uint32_t sample;
- int num_ols_changrp, offset, j;
- unsigned int i;
- unsigned char byte;
-
- (void)fd;
-
- sdi = cb_data;
- serial = sdi->conn;
- devc = sdi->priv;
-
- if (devc->num_transfers++ == 0) {
- /*
- * First time round, means the device started sending data,
- * and will not stop until done. If it stops sending for
- * longer than it takes to send a byte, that means it's
- * finished. We'll double that to 30ms to be sure...
- */
- serial_source_remove(sdi->session, serial);
- serial_source_add(sdi->session, serial, G_IO_IN, 30,
- ols_receive_data, cb_data);
- devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4);
- if (!devc->raw_sample_buf) {
- sr_err("Sample buffer malloc failed.");
- return FALSE;
- }
- /* fill with 1010... for debugging */
- memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4);
- }
-
- num_ols_changrp = 0;
- for (i = NUM_CHANNELS; i > 0x02; i /= 2) {
- if ((devc->flag_reg & i) == 0) {
- num_ols_changrp++;
- }
- }
-
- if (revents == G_IO_IN && devc->num_samples < devc->limit_samples) {
- if (serial_read_nonblocking(serial, &byte, 1) != 1)
- return FALSE;
- devc->cnt_bytes++;
-
- /* Ignore it if we've read enough. */
- if (devc->num_samples >= devc->limit_samples)
- return TRUE;
-
- devc->sample[devc->num_bytes++] = byte;
- sr_spew("Received byte 0x%.2x.", byte);
- if (devc->num_bytes == num_ols_changrp) {
- devc->cnt_samples++;
- devc->cnt_samples_rle++;
- /*
- * Got a full sample. Convert from the OLS's little-endian
- * sample to the local format.
- */
- sample = devc->sample[0] | (devc->sample[1] << 8) \
- | (devc->sample[2] << 16) | (devc->sample[3] << 24);
- sr_dbg("Received sample 0x%.*x.", devc->num_bytes * 2, sample);
- if (devc->flag_reg & FLAG_RLE) {
- /*
- * In RLE mode the high bit of the sample is the
- * "count" flag, meaning this sample is the number
- * of times the previous sample occurred.
- */
- if (devc->sample[devc->num_bytes - 1] & 0x80) {
- /* Clear the high bit. */
- sample &= ~(0x80 << (devc->num_bytes - 1) * 8);
- devc->rle_count = sample;
- devc->cnt_samples_rle += devc->rle_count;
- sr_dbg("RLE count: %u.", devc->rle_count);
- devc->num_bytes = 0;
- return TRUE;
- }
- }
- devc->num_samples += devc->rle_count + 1;
- if (devc->num_samples > devc->limit_samples) {
- /* Save us from overrunning the buffer. */
- devc->rle_count -= devc->num_samples - devc->limit_samples;
- devc->num_samples = devc->limit_samples;
- }
-
- if (num_ols_changrp < 4) {
- /*
- * Some channel groups may have been turned
- * off, to speed up transfer between the
- * hardware and the PC. Expand that here before
- * submitting it over the session bus --
- * whatever is listening on the bus will be
- * expecting a full 32-bit sample, based on
- * the number of channels.
- */
- j = 0;
- memset(devc->tmp_sample, 0, 4);
- for (i = 0; i < 4; i++) {
- if (((devc->flag_reg >> 2) & (1 << i)) == 0) {
- /*
- * This channel group was
- * enabled, copy from received
- * sample.
- */
- devc->tmp_sample[i] = devc->sample[j++];
- } else if (devc->flag_reg & FLAG_DEMUX && (i > 2)) {
- /* group 2 & 3 get added to 0 & 1 */
- devc->tmp_sample[i - 2] = devc->sample[j++];
- }
- }
- memcpy(devc->sample, devc->tmp_sample, 4);
- sr_spew("Expanded sample: 0x%.8x.", sample);
- }
-
- /*
- * the OLS sends its sample buffer backwards.
- * store it in reverse order here, so we can dump
- * this on the session bus later.
- */
- offset = (devc->limit_samples - devc->num_samples) * 4;
- for (i = 0; i <= devc->rle_count; i++) {
- memcpy(devc->raw_sample_buf + offset + (i * 4),
- devc->sample, 4);
- }
- memset(devc->sample, 0, 4);
- devc->num_bytes = 0;
- devc->rle_count = 0;
- }
- } else {
- /*
- * This is the main loop telling us a timeout was reached, or
- * we've acquired all the samples we asked for -- we're done.
- * Send the (properly-ordered) buffer to the frontend.
- */
- sr_dbg("Received %d bytes, %d samples, %d decompressed samples.",
- devc->cnt_bytes, devc->cnt_samples,
- devc->cnt_samples_rle);
- if (devc->trigger_at != -1) {
- /*
- * A trigger was set up, so we need to tell the frontend
- * about it.
- */
- if (devc->trigger_at > 0) {
- /* There are pre-trigger samples, send those first. */
- packet.type = SR_DF_LOGIC;
- packet.payload = &logic;
- logic.length = devc->trigger_at * 4;
- logic.unitsize = 4;
- logic.data = devc->raw_sample_buf +
- (devc->limit_samples - devc->num_samples) * 4;
- sr_session_send(cb_data, &packet);
- }
-
- /* Send the trigger. */
- packet.type = SR_DF_TRIGGER;
- sr_session_send(cb_data, &packet);
-
- /* Send post-trigger samples. */
- packet.type = SR_DF_LOGIC;
- packet.payload = &logic;
- logic.length = (devc->num_samples * 4) - (devc->trigger_at * 4);
- logic.unitsize = 4;
- logic.data = devc->raw_sample_buf + devc->trigger_at * 4 +
- (devc->limit_samples - devc->num_samples) * 4;
- sr_session_send(cb_data, &packet);
- } else {
- /* no trigger was used */
- packet.type = SR_DF_LOGIC;
- packet.payload = &logic;
- logic.length = devc->num_samples * 4;
- logic.unitsize = 4;
- logic.data = devc->raw_sample_buf +
- (devc->limit_samples - devc->num_samples) * 4;
- sr_session_send(cb_data, &packet);
- }
- g_free(devc->raw_sample_buf);
-
- serial_flush(serial);
- abort_acquisition(sdi);
- }
-
- return TRUE;
-}
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