+++ /dev/null
-/*
- * This file is part of the sigrok project.
- *
- * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
- * Copyright (C) 2011 Olivier Fauchon <olivier@aixmarseille.com>
- * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@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
- * the Free Software Foundation; either version 2 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, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#ifdef _WIN32
-#include <io.h>
-#include <fcntl.h>
-#define pipe(fds) _pipe(fds, 4096, _O_BINARY)
-#endif
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-
-/* Message logging helpers with driver-specific prefix string. */
-#define DRIVER_LOG_DOMAIN "demo: "
-#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
-#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
-
-/* TODO: Number of probes should be configurable. */
-#define NUM_PROBES 8
-
-#define DEMONAME "Demo device"
-
-/* The size of chunks to send through the session bus. */
-/* TODO: Should be configurable. */
-#define BUFSIZE 4096
-
-/* Supported patterns which we can generate */
-enum {
- /**
- * Pattern which spells "sigrok" using '0's (with '1's as "background")
- * when displayed using the 'bits' output format.
- */
- PATTERN_SIGROK,
-
- /** Pattern which consists of (pseudo-)random values on all probes. */
- PATTERN_RANDOM,
-
- /**
- * Pattern which consists of incrementing numbers.
- * TODO: Better description.
- */
- PATTERN_INC,
-
- /** Pattern where all probes have a low logic state. */
- PATTERN_ALL_LOW,
-
- /** Pattern where all probes have a high logic state. */
- PATTERN_ALL_HIGH,
-};
-
-/* Private, per-device-instance driver context. */
-struct dev_context {
- int pipe_fds[2];
- GIOChannel *channels[2];
- uint8_t sample_generator;
- uint64_t samples_counter;
- void *session_dev_id;
- int64_t starttime;
-};
-
-static const int hwcaps[] = {
- SR_HWCAP_LOGIC_ANALYZER,
- SR_HWCAP_DEMO_DEV,
- SR_HWCAP_SAMPLERATE,
- SR_HWCAP_PATTERN_MODE,
- SR_HWCAP_LIMIT_SAMPLES,
- SR_HWCAP_LIMIT_MSEC,
- SR_HWCAP_CONTINUOUS,
-};
-
-static const struct sr_samplerates samplerates = {
- SR_HZ(1),
- SR_GHZ(1),
- SR_HZ(1),
- NULL,
-};
-
-static const char *pattern_strings[] = {
- "sigrok",
- "random",
- "incremental",
- "all-low",
- "all-high",
- NULL,
-};
-
-/* We name the probes 0-7 on our demo driver. */
-static const char *probe_names[NUM_PROBES + 1] = {
- "0", "1", "2", "3", "4", "5", "6", "7",
- NULL,
-};
-
-static uint8_t pattern_sigrok[] = {
- 0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00,
- 0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00,
- 0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00,
- 0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00,
- 0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00,
- 0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-};
-
-/* Private, per-device-instance driver context. */
-/* TODO: struct context as with the other drivers. */
-
-/* List of struct sr_dev_inst, maintained by dev_open()/dev_close(). */
-SR_PRIV struct sr_dev_driver demo_driver_info;
-static struct sr_dev_driver *di = &demo_driver_info;
-static uint64_t cur_samplerate = SR_KHZ(200);
-static uint64_t limit_samples = 0;
-static uint64_t limit_msec = 0;
-static int default_pattern = PATTERN_SIGROK;
-
-static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
-
-static int clear_instances(void)
-{
- /* Nothing needed so far. */
-
- return SR_OK;
-}
-
-static int hw_init(struct sr_context *sr_ctx)
-{
- struct drv_context *drvc;
-
- if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
- sr_err("Driver context malloc failed.");
- return SR_ERR_MALLOC;
- }
- drvc->sr_ctx = sr_ctx;
- di->priv = drvc;
-
- return SR_OK;
-}
-
-static GSList *hw_scan(GSList *options)
-{
- struct sr_dev_inst *sdi;
- struct sr_probe *probe;
- struct drv_context *drvc;
- GSList *devices;
- int i;
-
- (void)options;
-
- drvc = di->priv;
- devices = NULL;
-
- sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL);
- if (!sdi) {
- sr_err("%s: sr_dev_inst_new failed", __func__);
- return 0;
- }
- sdi->driver = di;
-
- for (i = 0; probe_names[i]; i++) {
- if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
- probe_names[i])))
- return NULL;
- sdi->probes = g_slist_append(sdi->probes, probe);
- }
-
- devices = g_slist_append(devices, sdi);
- drvc->instances = g_slist_append(drvc->instances, sdi);
-
- return devices;
-}
-
-static GSList *hw_dev_list(void)
-{
- struct drv_context *drvc;
-
- drvc = di->priv;
-
- return drvc->instances;
-}
-
-static int hw_dev_open(struct sr_dev_inst *sdi)
-{
- (void)sdi;
-
- /* Nothing needed so far. */
-
- return SR_OK;
-}
-
-static int hw_dev_close(struct sr_dev_inst *sdi)
-{
- (void)sdi;
-
- /* Nothing needed so far. */
-
- return SR_OK;
-}
-
-static int hw_cleanup(void)
-{
- /* Nothing needed so far. */
- return SR_OK;
-}
-
-static int hw_info_get(int info_id, const void **data,
- const struct sr_dev_inst *sdi)
-{
- (void)sdi;
-
- switch (info_id) {
- case SR_DI_HWCAPS:
- *data = hwcaps;
- break;
- case SR_DI_SAMPLERATES:
- *data = &samplerates;
- break;
- case SR_DI_CUR_SAMPLERATE:
- *data = &cur_samplerate;
- break;
- case SR_DI_PATTERNS:
- *data = &pattern_strings;
- break;
- default:
- return SR_ERR_ARG;
- }
-
- return SR_OK;
-}
-
-static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
- const void *value)
-{
- int ret;
- const char *stropt;
-
- (void)sdi;
-
- if (hwcap == SR_HWCAP_SAMPLERATE) {
- cur_samplerate = *(const uint64_t *)value;
- sr_dbg("%s: setting samplerate to %" PRIu64, __func__,
- cur_samplerate);
- ret = SR_OK;
- } else if (hwcap == SR_HWCAP_LIMIT_SAMPLES) {
- limit_msec = 0;
- limit_samples = *(const uint64_t *)value;
- sr_dbg("%s: setting limit_samples to %" PRIu64, __func__,
- limit_samples);
- ret = SR_OK;
- } else if (hwcap == SR_HWCAP_LIMIT_MSEC) {
- limit_msec = *(const uint64_t *)value;
- limit_samples = 0;
- sr_dbg("%s: setting limit_msec to %" PRIu64, __func__,
- limit_msec);
- ret = SR_OK;
- } else if (hwcap == SR_HWCAP_PATTERN_MODE) {
- stropt = value;
- ret = SR_OK;
- if (!strcmp(stropt, "sigrok")) {
- default_pattern = PATTERN_SIGROK;
- } else if (!strcmp(stropt, "random")) {
- default_pattern = PATTERN_RANDOM;
- } else if (!strcmp(stropt, "incremental")) {
- default_pattern = PATTERN_INC;
- } else if (!strcmp(stropt, "all-low")) {
- default_pattern = PATTERN_ALL_LOW;
- } else if (!strcmp(stropt, "all-high")) {
- default_pattern = PATTERN_ALL_HIGH;
- } else {
- ret = SR_ERR;
- }
- sr_dbg("%s: setting pattern to %d", __func__, default_pattern);
- } else {
- ret = SR_ERR;
- }
-
- return ret;
-}
-
-static void samples_generator(uint8_t *buf, uint64_t size,
- struct dev_context *devc)
-{
- static uint64_t p = 0;
- uint64_t i;
-
- /* TODO: Needed? */
- memset(buf, 0, size);
-
- switch (devc->sample_generator) {
- case PATTERN_SIGROK: /* sigrok pattern */
- for (i = 0; i < size; i++) {
- *(buf + i) = ~(pattern_sigrok[p] >> 1);
- if (++p == 64)
- p = 0;
- }
- break;
- case PATTERN_RANDOM: /* Random */
- for (i = 0; i < size; i++)
- *(buf + i) = (uint8_t)(rand() & 0xff);
- break;
- case PATTERN_INC: /* Simple increment */
- for (i = 0; i < size; i++)
- *(buf + i) = i;
- break;
- case PATTERN_ALL_LOW: /* All probes are low */
- memset(buf, 0x00, size);
- break;
- case PATTERN_ALL_HIGH: /* All probes are high */
- memset(buf, 0xff, size);
- break;
- default:
- sr_err("Unknown pattern: %d.", devc->sample_generator);
- break;
- }
-}
-
-/* Callback handling data */
-static int receive_data(int fd, int revents, void *cb_data)
-{
- struct dev_context *devc = cb_data;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_logic logic;
- uint8_t buf[BUFSIZE];
- static uint64_t samples_to_send, expected_samplenum, sending_now;
- int64_t time, elapsed;
-
- (void)fd;
- (void)revents;
-
- /* How many "virtual" samples should we have collected by now? */
- time = g_get_monotonic_time();
- elapsed = time - devc->starttime;
- expected_samplenum = elapsed * cur_samplerate / 1000000;
- /* Of those, how many do we still have to send? */
- samples_to_send = expected_samplenum - devc->samples_counter;
-
- if (limit_samples) {
- samples_to_send = MIN(samples_to_send,
- limit_samples - devc->samples_counter);
- }
-
- while (samples_to_send > 0) {
- sending_now = MIN(samples_to_send, sizeof(buf));
- samples_to_send -= sending_now;
- samples_generator(buf, sending_now, devc);
-
- packet.type = SR_DF_LOGIC;
- packet.payload = &logic;
- logic.length = sending_now;
- logic.unitsize = 1;
- logic.data = buf;
- sr_session_send(devc->session_dev_id, &packet);
- devc->samples_counter += sending_now;
- }
-
- if (limit_samples && devc->samples_counter >= limit_samples) {
- sr_info("Requested number of samples reached.");
- hw_dev_acquisition_stop(NULL, cb_data);
- return TRUE;
- }
-
- return TRUE;
-}
-
-static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
- void *cb_data)
-{
- struct sr_datafeed_packet *packet;
- struct sr_datafeed_header *header;
- struct dev_context *devc;
-
- (void)sdi;
-
- sr_dbg("Starting acquisition.");
-
- /* TODO: 'devc' is never g_free()'d? */
- if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
- sr_err("%s: devc malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
-
- devc->sample_generator = default_pattern;
- devc->session_dev_id = cb_data;
- devc->samples_counter = 0;
-
- /*
- * Setting two channels connected by a pipe is a remnant from when the
- * demo driver generated data in a thread, and collected and sent the
- * data in the main program loop.
- * They are kept here because it provides a convenient way of setting
- * up a timeout-based polling mechanism.
- */
- if (pipe(devc->pipe_fds)) {
- /* TODO: Better error message. */
- sr_err("%s: pipe() failed", __func__);
- return SR_ERR;
- }
-
- devc->channels[0] = g_io_channel_unix_new(devc->pipe_fds[0]);
- devc->channels[1] = g_io_channel_unix_new(devc->pipe_fds[1]);
-
- g_io_channel_set_flags(devc->channels[0], G_IO_FLAG_NONBLOCK, NULL);
-
- /* Set channel encoding to binary (default is UTF-8). */
- g_io_channel_set_encoding(devc->channels[0], NULL, NULL);
- g_io_channel_set_encoding(devc->channels[1], NULL, NULL);
-
- /* Make channels to unbuffered. */
- g_io_channel_set_buffered(devc->channels[0], FALSE);
- g_io_channel_set_buffered(devc->channels[1], FALSE);
-
- sr_session_source_add_channel(devc->channels[0], G_IO_IN | G_IO_ERR,
- 40, receive_data, devc);
-
- if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
- sr_err("%s: packet malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
-
- if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
- sr_err("%s: header malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
-
- packet->type = SR_DF_HEADER;
- packet->payload = header;
- header->feed_version = 1;
- gettimeofday(&header->starttime, NULL);
- sr_session_send(devc->session_dev_id, packet);
-
- /* We use this timestamp to decide how many more samples to send. */
- devc->starttime = g_get_monotonic_time();
-
- g_free(header);
- g_free(packet);
-
- return SR_OK;
-}
-
-static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
-{
- struct dev_context *devc;
- struct sr_datafeed_packet packet;
-
- (void)sdi;
-
- devc = cb_data;
-
- sr_dbg("Stopping aquisition.");
-
- sr_session_source_remove_channel(devc->channels[0]);
- g_io_channel_shutdown(devc->channels[0], FALSE, NULL);
-
- /* Send last packet. */
- packet.type = SR_DF_END;
- sr_session_send(devc->session_dev_id, &packet);
-
- return SR_OK;
-}
-
-SR_PRIV struct sr_dev_driver demo_driver_info = {
- .name = "demo",
- .longname = "Demo driver and pattern generator",
- .api_version = 1,
- .init = hw_init,
- .cleanup = hw_cleanup,
- .scan = hw_scan,
- .dev_list = hw_dev_list,
- .dev_clear = clear_instances,
- .dev_open = hw_dev_open,
- .dev_close = hw_dev_close,
- .info_get = hw_info_get,
- .dev_config_set = hw_dev_config_set,
- .dev_acquisition_start = hw_dev_acquisition_start,
- .dev_acquisition_stop = hw_dev_acquisition_stop,
- .priv = NULL,
-};
projects / libsigrok.git / blobdiff