+++ /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>
- *
- * 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>
-#include <sigrok.h>
-#ifdef _WIN32
-#include <io.h>
-#include <fcntl.h>
-#define pipe(fds) _pipe(fds, 4096, _O_BINARY)
-#endif
-#include "config.h"
-
-#define NUM_PROBES 8
-#define DEMONAME "Demo device"
-/* size of chunks to send through the session bus */
-#define BUFSIZE 4096
-
-enum {
- GENMODE_DEFAULT,
- GENMODE_RANDOM,
- GENMODE_INC,
-};
-
-/* 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 = {
- 1,
- SR_GHZ(1),
- 1,
- NULL,
-};
-
-static const char *patternmodes[] = {
- "random",
- "incremental",
- NULL,
-};
-
-static uint8_t genmode_default[] = {
- 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_genmode = GENMODE_DEFAULT;
-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)
- 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 void hw_closedev(int device_index)
-{
- /* Avoid compiler warnings. */
- device_index = device_index;
-
- /* Nothing needed so far. */
-}
-
-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)))
- 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 = &patternmodes;
- 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;
- uint64_t *tmp_u64;
- 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) {
- tmp_u64 = value;
- cur_samplerate = *tmp_u64;
- ret = SR_OK;
- } else if (capability == SR_HWCAP_LIMIT_SAMPLES) {
- tmp_u64 = value;
- limit_samples = *tmp_u64;
- ret = SR_OK;
- } else if (capability == SR_HWCAP_LIMIT_MSEC) {
- tmp_u64 = value;
- limit_msec = *tmp_u64;
- ret = SR_OK;
- } else if (capability == SR_HWCAP_PATTERN_MODE) {
- stropt = value;
- if (!strcmp(stropt, "random")) {
- default_genmode = GENMODE_RANDOM;
- ret = SR_OK;
- } else if (!strcmp(stropt, "incremental")) {
- default_genmode = GENMODE_INC;
- ret = SR_OK;
- } else {
- ret = SR_ERR;
- }
- } 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;
-
- memset(buf, 0, size);
-
- switch (mydata->sample_generator) {
- case GENMODE_DEFAULT:
- for (i = 0; i < size; i++) {
- *(buf + i) = ~(genmode_default[p] >> 1);
- if (++p == 64)
- p = 0;
- }
- break;
- case GENMODE_RANDOM: /* Random */
- for (i = 0; i < size; i++)
- *(buf + i) = (uint8_t)(rand() & 0xff);
- break;
- case GENMODE_INC: /* Simple increment */
- for (i = 0; i < size; i++)
- *(buf + i) = i;
- 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;
-
- mydata = malloc(sizeof(struct databag));
- if (!mydata)
- return SR_ERR_MALLOC;
-
- mydata->sample_generator = default_genmode;
- mydata->session_device_id = session_device_id;
- mydata->device_index = device_index;
- mydata->samples_counter = 0;
-
- if (pipe(mydata->pipe_fds))
- 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 needs to be done between g_thread_init() and 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)
- return SR_ERR;
-
- packet = malloc(sizeof(struct sr_datafeed_packet));
- header = malloc(sizeof(struct sr_datafeed_header));
- if (!packet || !header)
- 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);
- free(header);
- 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 = {
- "demo",
- "Demo driver and pattern generator",
- 1,
- hw_init,
- hw_cleanup,
- hw_opendev,
- hw_closedev,
- hw_get_device_info,
- hw_get_status,
- hw_get_capabilities,
- hw_set_configuration,
- hw_start_acquisition,
- hw_stop_acquisition,
-};
projects / libsigrok.git / blobdiff