X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fdemo%2Fdemo.c;h=7111097bb7657046d70c4f1efcf03e4cf39092cf;hb=HEAD;hp=2fbac3eaaef6b415fe9a32e6c19fbc461ccd418b;hpb=3ffb6964a1585b5f6ffa0747c089a1cd557e4feb;p=libsigrok.git diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c deleted file mode 100644 index 2fbac3ea..00000000 --- a/hardware/demo/demo.c +++ /dev/null @@ -1,533 +0,0 @@ -/* - * This file is part of the sigrok project. - * - * Copyright (C) 2010 Uwe Hermann - * Copyright (C) 2011 Olivier Fauchon - * - * 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 -#include -#include -#ifdef _WIN32 -#include -#include -#define pipe(fds) _pipe(fds, 4096, _O_BINARY) -#endif -#include "libsigrok.h" -#include "libsigrok-internal.h" - -/* 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, -}; - -/* FIXME: Should not be global. */ - -struct context { - int pipe_fds[2]; - GIOChannel *channels[2]; - uint8_t sample_generator; - uint8_t thread_running; - uint64_t samples_counter; - void *session_dev_id; - GTimer *timer; -}; - -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 *ddi = &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 GThread *my_thread; -static int thread_running; - -static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi, - void *cb_data); - -static int hw_init(void) -{ - - /* Nothing to do. */ - - return SR_OK; -} - -static GSList *hw_scan(GSList *options) -{ - struct sr_dev_inst *sdi; - GSList *devices; - - (void)options; - devices = NULL; - - sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL); - if (!sdi) { - sr_err("demo: %s: sr_dev_inst_new failed", __func__); - return 0; - } - sdi->driver = ddi; - - devices = g_slist_append(devices, sdi); - ddi->instances = g_slist_append(ddi->instances, sdi); - - return devices; -} - -static int hw_dev_open(struct sr_dev_inst *sdi) -{ - /* Avoid compiler warnings. */ - (void)sdi; - - /* Nothing needed so far. */ - - return SR_OK; -} - -static int hw_dev_close(struct sr_dev_inst *sdi) -{ - /* Avoid compiler warnings. */ - (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) -{ - - switch (info_id) { - case SR_DI_INST: - *data = sdi; - break; - case SR_DI_HWCAPS: - *data = hwcaps; - break; - case SR_DI_NUM_PROBES: - *data = GINT_TO_POINTER(NUM_PROBES); - break; - case SR_DI_PROBE_NAMES: - *data = probe_names; - 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_status_get(int dev_index) -{ - /* Avoid compiler warnings. */ - (void)dev_index; - - return SR_ST_ACTIVE; -} - -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_PROBECONFIG) { - /* Nothing to do, but must be supported */ - ret = SR_OK; - } else if (hwcap == SR_HWCAP_SAMPLERATE) { - cur_samplerate = *(const uint64_t *)value; - sr_dbg("demo: %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("demo: %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("demo: %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("demo: %s: setting pattern to %d", __func__, - default_pattern); - } else { - ret = SR_ERR; - } - - return ret; -} - -static void samples_generator(uint8_t *buf, uint64_t size, void *data) -{ - static uint64_t p = 0; - struct context *ctx = data; - uint64_t i; - - /* TODO: Needed? */ - memset(buf, 0, size); - - switch (ctx->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("demo: %s: unknown pattern %d", __func__, - ctx->sample_generator); - break; - } -} - -/* Thread function */ -static void thread_func(void *data) -{ - struct context *ctx = data; - uint8_t buf[BUFSIZE]; - uint64_t nb_to_send = 0; - int bytes_written; - double time_cur, time_last, time_diff; - - time_last = g_timer_elapsed(ctx->timer, NULL); - - while (thread_running) { - /* Rate control */ - time_cur = g_timer_elapsed(ctx->timer, NULL); - - time_diff = time_cur - time_last; - time_last = time_cur; - - nb_to_send = cur_samplerate * time_diff; - - if (limit_samples) { - nb_to_send = MIN(nb_to_send, - limit_samples - ctx->samples_counter); - } - - /* Make sure we don't overflow. */ - nb_to_send = MIN(nb_to_send, BUFSIZE); - - if (nb_to_send) { - samples_generator(buf, nb_to_send, data); - ctx->samples_counter += nb_to_send; - - g_io_channel_write_chars(ctx->channels[1], (gchar *)&buf, - nb_to_send, (gsize *)&bytes_written, NULL); - } - - /* Check if we're done. */ - if ((limit_msec && time_cur * 1000 > limit_msec) || - (limit_samples && ctx->samples_counter >= limit_samples)) - { - close(ctx->pipe_fds[1]); - thread_running = 0; - } - - g_usleep(10); - } -} - -/* Callback handling data */ -static int receive_data(int fd, int revents, void *cb_data) -{ - struct context *ctx = cb_data; - struct sr_datafeed_packet packet; - struct sr_datafeed_logic logic; - static uint64_t samples_received = 0; - unsigned char c[BUFSIZE]; - gsize z; - - /* Avoid compiler warnings. */ - (void)fd; - (void)revents; - - do { - g_io_channel_read_chars(ctx->channels[0], - (gchar *)&c, BUFSIZE, &z, NULL); - - if (z > 0) { - packet.type = SR_DF_LOGIC; - packet.payload = &logic; - logic.length = z; - logic.unitsize = 1; - logic.data = c; - sr_session_send(ctx->session_dev_id, &packet); - samples_received += z; - } - } while (z > 0); - - if (!thread_running && z <= 0) { - /* Make sure we don't receive more packets. */ - g_io_channel_shutdown(ctx->channels[0], FALSE, NULL); - - /* Send last packet. */ - packet.type = SR_DF_END; - sr_session_send(ctx->session_dev_id, &packet); - - return FALSE; - } - - 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 sr_datafeed_meta_logic meta; - struct context *ctx; - - (void)sdi; - - /* TODO: 'ctx' is never g_free()'d? */ - if (!(ctx = g_try_malloc(sizeof(struct context)))) { - sr_err("demo: %s: ctx malloc failed", __func__); - return SR_ERR_MALLOC; - } - - ctx->sample_generator = default_pattern; - ctx->session_dev_id = cb_data; - ctx->samples_counter = 0; - - if (pipe(ctx->pipe_fds)) { - /* TODO: Better error message. */ - sr_err("demo: %s: pipe() failed", __func__); - return SR_ERR; - } - - ctx->channels[0] = g_io_channel_unix_new(ctx->pipe_fds[0]); - ctx->channels[1] = g_io_channel_unix_new(ctx->pipe_fds[1]); - - g_io_channel_set_flags(ctx->channels[0], G_IO_FLAG_NONBLOCK, NULL); - - /* Set channel encoding to binary (default is UTF-8). */ - g_io_channel_set_encoding(ctx->channels[0], NULL, NULL); - g_io_channel_set_encoding(ctx->channels[1], NULL, NULL); - - /* Make channels to unbuffered. */ - g_io_channel_set_buffered(ctx->channels[0], FALSE); - g_io_channel_set_buffered(ctx->channels[1], FALSE); - - sr_session_source_add_channel(ctx->channels[0], G_IO_IN | G_IO_ERR, - 40, receive_data, ctx); - - /* Run the demo thread. */ - g_thread_init(NULL); - /* This must to be done between g_thread_init() & g_thread_create(). */ - ctx->timer = g_timer_new(); - thread_running = 1; - my_thread = - g_thread_create((GThreadFunc)thread_func, ctx, TRUE, NULL); - if (!my_thread) { - sr_err("demo: %s: g_thread_create failed", __func__); - return SR_ERR; /* TODO */ - } - - if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) { - sr_err("demo: %s: packet malloc failed", __func__); - return SR_ERR_MALLOC; - } - - if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) { - sr_err("demo: %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(ctx->session_dev_id, packet); - - /* Send metadata about the SR_DF_LOGIC packets to come. */ - packet->type = SR_DF_META_LOGIC; - packet->payload = &meta; - meta.samplerate = cur_samplerate; - meta.num_probes = NUM_PROBES; - sr_session_send(ctx->session_dev_id, packet); - - g_free(header); - g_free(packet); - - return SR_OK; -} - -static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi, - void *cb_data) -{ - /* Avoid compiler warnings. */ - (void)sdi; - (void)cb_data; - - /* Stop generate thread. */ - thread_running = 0; - - 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_open = hw_dev_open, - .dev_close = hw_dev_close, - .info_get = hw_info_get, - .dev_status_get = hw_dev_status_get, - .dev_config_set = hw_dev_config_set, - .dev_acquisition_start = hw_dev_acquisition_start, - .dev_acquisition_stop = hw_dev_acquisition_stop, - .instances = NULL, -};