X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fdemo%2Fdemo.c;h=7111097bb7657046d70c4f1efcf03e4cf39092cf;hb=HEAD;hp=356a9bca5d6c8e4444e8eb3df085bdadb393431f;hpb=c03ed397330b031fa5f63a5dd548e05c2c2d6923;p=libsigrok.git diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c deleted file mode 100644 index 356a9bca..00000000 --- a/hardware/demo/demo.c +++ /dev/null @@ -1,489 +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 -#include -#include -#ifdef _WIN32 -#include -#include -#define pipe(fds) _pipe(fds, 4096, _O_BINARY) -#endif -#include "config.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. */ -GIOChannel *channels[2]; - -struct databag { - int pipe_fds[2]; - uint8_t sample_generator; - uint8_t thread_running; - uint64_t samples_counter; - int device_index; - gpointer session_device_id; - GTimer *timer; -}; - -static int capabilities[] = { - SR_HWCAP_LOGIC_ANALYZER, - SR_HWCAP_SAMPLERATE, - SR_HWCAP_PATTERN_MODE, - SR_HWCAP_LIMIT_SAMPLES, - SR_HWCAP_LIMIT_MSEC, - SR_HWCAP_CONTINUOUS, -}; - -static 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, -}; - -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, -}; - -/* List of struct sr_device_instance, maintained by opendev()/closedev(). */ -static GSList *device_instances = NULL; -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 void hw_stop_acquisition(int device_index, gpointer session_device_id); - -static int hw_init(const char *deviceinfo) -{ - struct sr_device_instance *sdi; - - /* Avoid compiler warnings. */ - deviceinfo = deviceinfo; - - sdi = sr_device_instance_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL); - if (!sdi) { - sr_err("demo: %s: sr_device_instance_new failed", __func__); - return 0; - } - - device_instances = g_slist_append(device_instances, sdi); - - return 1; -} - -static int hw_opendev(int device_index) -{ - /* Avoid compiler warnings. */ - device_index = device_index; - - /* Nothing needed so far. */ - - return SR_OK; -} - -static int hw_closedev(int device_index) -{ - /* Avoid compiler warnings. */ - device_index = device_index; - - /* Nothing needed so far. */ - - return SR_OK; -} - -static void hw_cleanup(void) -{ - /* Nothing needed so far. */ -} - -static void *hw_get_device_info(int device_index, int device_info_id) -{ - struct sr_device_instance *sdi; - void *info = NULL; - - if (!(sdi = sr_get_device_instance(device_instances, device_index))) { - sr_err("demo: %s: sdi was NULL", __func__); - return NULL; - } - - switch (device_info_id) { - case SR_DI_INSTANCE: - info = sdi; - break; - case SR_DI_NUM_PROBES: - info = GINT_TO_POINTER(NUM_PROBES); - break; - case SR_DI_SAMPLERATES: - info = &samplerates; - break; - case SR_DI_CUR_SAMPLERATE: - info = &cur_samplerate; - break; - case SR_DI_PATTERNMODES: - info = &pattern_strings; - break; - } - - return info; -} - -static int hw_get_status(int device_index) -{ - /* Avoid compiler warnings. */ - device_index = device_index; - - return SR_ST_ACTIVE; -} - -static int *hw_get_capabilities(void) -{ - return capabilities; -} - -static int hw_set_configuration(int device_index, int capability, void *value) -{ - int ret; - char *stropt; - - /* Avoid compiler warnings. */ - device_index = device_index; - - if (capability == SR_HWCAP_PROBECONFIG) { - /* Nothing to do, but must be supported */ - ret = SR_OK; - } else if (capability == SR_HWCAP_SAMPLERATE) { - cur_samplerate = *(uint64_t *)value; - sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__, - cur_samplerate); - ret = SR_OK; - } else if (capability == SR_HWCAP_LIMIT_SAMPLES) { - limit_samples = *(uint64_t *)value; - sr_dbg("demo: %s: setting limit_samples to %" PRIu64, __func__, - limit_samples); - ret = SR_OK; - } else if (capability == SR_HWCAP_LIMIT_MSEC) { - limit_msec = *(uint64_t *)value; - sr_dbg("demo: %s: setting limit_msec to %" PRIu64, __func__, - limit_msec); - ret = SR_OK; - } else if (capability == 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 databag *mydata = data; - uint64_t i; - - /* TODO: Needed? */ - memset(buf, 0, size); - - switch (mydata->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 */ - for (i = 0; i < size; i++) - *(buf + i) = 0x00; - break; - case PATTERN_ALL_HIGH: /* All probes are high */ - for (i = 0; i < size; i++) - *(buf + i) = 0xff; - break; - default: - /* TODO: Error handling. */ - break; - } -} - -/* Thread function */ -static void thread_func(void *data) -{ - struct databag *mydata = 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(mydata->timer, NULL); - - while (thread_running) { - /* Rate control */ - time_cur = g_timer_elapsed(mydata->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 - mydata->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); - mydata->samples_counter += nb_to_send; - - g_io_channel_write_chars(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 && mydata->samples_counter >= limit_samples)) - { - close(mydata->pipe_fds[1]); - thread_running = 0; - } - - g_usleep(10); - } -} - -/* Callback handling data */ -static int receive_data(int fd, int revents, void *user_data) -{ - struct sr_datafeed_packet packet; - char c[BUFSIZE]; - gsize z; - - /* Avoid compiler warnings. */ - fd = fd; - revents = revents; - - do { - g_io_channel_read_chars(channels[0], - (gchar *)&c, BUFSIZE, &z, NULL); - - if (z > 0) { - packet.type = SR_DF_LOGIC; - packet.length = z; - packet.unitsize = 1; - packet.payload = c; - sr_session_bus(user_data, &packet); - } - } while (z > 0); - - if (!thread_running && z <= 0) { - /* Make sure we don't receive more packets. */ - g_io_channel_close(channels[0]); - - /* Send last packet. */ - packet.type = SR_DF_END; - sr_session_bus(user_data, &packet); - - return FALSE; - } - - return TRUE; -} - -static int hw_start_acquisition(int device_index, gpointer session_device_id) -{ - struct sr_datafeed_packet *packet; - struct sr_datafeed_header *header; - struct databag *mydata; - - /* TODO: 'mydata' is never g_free()'d? */ - if (!(mydata = g_try_malloc(sizeof(struct databag)))) { - sr_err("demo: %s: mydata malloc failed", __func__); - return SR_ERR_MALLOC; - } - - mydata->sample_generator = default_pattern; - mydata->session_device_id = session_device_id; - mydata->device_index = device_index; - mydata->samples_counter = 0; - - if (pipe(mydata->pipe_fds)) { - /* TODO: Better error message. */ - sr_err("demo: %s: pipe() failed", __func__); - return SR_ERR; - } - - channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]); - channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]); - - /* Set channel encoding to binary (default is UTF-8). */ - g_io_channel_set_encoding(channels[0], NULL, NULL); - g_io_channel_set_encoding(channels[1], NULL, NULL); - - /* Make channels to unbuffered. */ - g_io_channel_set_buffered(channels[0], FALSE); - g_io_channel_set_buffered(channels[1], FALSE); - - sr_source_add(mydata->pipe_fds[0], G_IO_IN | G_IO_ERR, 40, - receive_data, session_device_id); - - /* Run the demo thread. */ - g_thread_init(NULL); - /* This must to be done between g_thread_init() & g_thread_create(). */ - mydata->timer = g_timer_new(); - thread_running = 1; - my_thread = - g_thread_create((GThreadFunc)thread_func, mydata, 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->length = sizeof(struct sr_datafeed_header); - packet->payload = (unsigned char *)header; - header->feed_version = 1; - gettimeofday(&header->starttime, NULL); - header->samplerate = cur_samplerate; - header->protocol_id = SR_PROTO_RAW; - header->num_logic_probes = NUM_PROBES; - header->num_analog_probes = 0; - sr_session_bus(session_device_id, packet); - g_free(header); - g_free(packet); - - return SR_OK; -} - -static void hw_stop_acquisition(int device_index, gpointer session_device_id) -{ - /* Avoid compiler warnings. */ - device_index = device_index; - session_device_id = session_device_id; - - /* Stop generate thread. */ - thread_running = 0; -} - -struct sr_device_plugin demo_plugin_info = { - .name = "demo", - .longname = "Demo driver and pattern generator", - .api_version = 1, - .init = hw_init, - .cleanup = hw_cleanup, - .opendev = hw_opendev, - .closedev = hw_closedev, - .get_device_info = hw_get_device_info, - .get_status = hw_get_status, - .get_capabilities = hw_get_capabilities, - .set_configuration = hw_set_configuration, - .start_acquisition = hw_start_acquisition, - .stop_acquisition = hw_stop_acquisition, -};