[libsigrok.git] / hardware / demo / demo.c

/*
 * 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>
#include <sigrok-internal.h>
#ifdef _WIN32
#include <io.h>
#include <fcntl.h>
#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,
};
Commit	Line	Data
6239c175 UH	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
fc96e6f8	5	* Copyright (C) 2011 Olivier Fauchon <olivier@aixmarseille.com>
6239c175 UH	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	20	*/
	21
	22	#include <stdlib.h>
85b5af06	23	#include <unistd.h>
6239c175 UH	24	#include <string.h>
6239c175 UH	25	#include <sigrok.h>
4af22da5	26	#include <sigrok-internal.h>
d35aaf02 UH	27	#ifdef _WIN32
	28	#include <io.h>
	29	#include <fcntl.h>
	30	#define pipe(fds) _pipe(fds, 4096, _O_BINARY)
	31	#endif
6239c175 UH	32	#include "config.h"
6239c175 UH	33
c03ed397	34	/* TODO: Number of probes should be configurable. */
e15f48c2	35	#define NUM_PROBES 8
c03ed397	36
e15f48c2	37	#define DEMONAME "Demo device"
c03ed397 UH	38
	39	/* The size of chunks to send through the session bus. */
	40	/* TODO: Should be configurable. */
e15f48c2	41	#define BUFSIZE 4096
85b5af06	42
0d31276b	43	/* Supported patterns which we can generate */
e15f48c2	44	enum {
0d31276b UH	45	/**
	46	* Pattern which spells "sigrok" using '0's (with '1's as "background")
	47	* when displayed using the 'bits' output format.
	48	*/
c8f4624d	49	PATTERN_SIGROK,
0d31276b	50
c03ed397	51	/** Pattern which consists of (pseudo-)random values on all probes. */
c8f4624d	52	PATTERN_RANDOM,
0d31276b UH	53
	54	/**
	55	* Pattern which consists of incrementing numbers.
	56	* TODO: Better description.
	57	*/
c8f4624d	58	PATTERN_INC,
c03ed397 UH	59
	60	/** Pattern where all probes have a low logic state. */
	61	PATTERN_ALL_LOW,
	62
	63	/** Pattern where all probes have a high logic state. */
	64	PATTERN_ALL_HIGH,
e15f48c2	65	};
85b5af06	66
29cbfeaf	67	/* FIXME: Should not be global. */
d35aaf02 UH	68	GIOChannel *channels[2];
d35aaf02 UH	69
e15f48c2 BV	70	struct databag {
	71	int pipe_fds[2];
	72	uint8_t sample_generator;
	73	uint8_t thread_running;
	74	uint64_t samples_counter;
	75	int device_index;
e15f48c2	76	gpointer session_device_id;
b9cc3629	77	GTimer *timer;
e15f48c2	78	};
85b5af06	79
6239c175	80	static int capabilities[] = {
5a2326a7	81	SR_HWCAP_LOGIC_ANALYZER,
4bfbf9fc	82	SR_HWCAP_SAMPLERATE,
5a2326a7 UH	83	SR_HWCAP_PATTERN_MODE,
	84	SR_HWCAP_LIMIT_SAMPLES,
	85	SR_HWCAP_LIMIT_MSEC,
	86	SR_HWCAP_CONTINUOUS,
6239c175 UH	87	};
6239c175 UH	88
4bfbf9fc	89	static struct sr_samplerates samplerates = {
c9140419	90	SR_HZ(1),
59df0c77	91	SR_GHZ(1),
c9140419	92	SR_HZ(1),
4bfbf9fc BV	93	NULL,
	94	};
	95
c8f4624d	96	static const char *pattern_strings[] = {
c03ed397	97	"sigrok",
e15f48c2 BV	98	"random",
e15f48c2 BV	99	"incremental",
c03ed397 UH	100	"all-low",
c03ed397 UH	101	"all-high",
02440dd8	102	NULL,
85b5af06 UH	103	};
85b5af06 UH	104
c8f4624d	105	static uint8_t pattern_sigrok[] = {
917e0e71 BV	106	0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00,
	107	0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00,
	108	0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00,
	109	0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00,
	110	0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00,
	111	0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00,
	112	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	113	0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	114	};
	115
a00ba012	116	/* List of struct sr_device_instance, maintained by opendev()/closedev(). */
85b5af06	117	static GSList *device_instances = NULL;
59df0c77	118	static uint64_t cur_samplerate = SR_KHZ(200);
b9cc3629 BV	119	static uint64_t limit_samples = 0;
b9cc3629 BV	120	static uint64_t limit_msec = 0;
c8f4624d	121	static int default_pattern = PATTERN_SIGROK;
b9cc3629 BV	122	static GThread *my_thread;
b9cc3629 BV	123	static int thread_running;
6239c175	124
6239c175 UH	125	static void hw_stop_acquisition(int device_index, gpointer session_device_id);
6239c175 UH	126
54ac5277	127	static int hw_init(const char *deviceinfo)
6239c175	128	{
a00ba012	129	struct sr_device_instance *sdi;
85b5af06	130
e15f48c2 BV	131	/* Avoid compiler warnings. */
e15f48c2 BV	132	deviceinfo = deviceinfo;
85b5af06	133
5a2326a7	134	sdi = sr_device_instance_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL);
c03ed397 UH	135	if (!sdi) {
c03ed397 UH	136	sr_err("demo: %s: sr_device_instance_new failed", __func__);
85b5af06	137	return 0;
c03ed397	138	}
e15f48c2	139
85b5af06 UH	140	device_instances = g_slist_append(device_instances, sdi);
	141
	142	return 1;
6239c175 UH	143	}
	144
	145	static int hw_opendev(int device_index)
	146	{
17e1afcb	147	/* Avoid compiler warnings. */
6239c175 UH	148	device_index = device_index;
	149
	150	/* Nothing needed so far. */
697785d1	151
e46b8fb1	152	return SR_OK;
6239c175 UH	153	}
6239c175 UH	154
697785d1	155	static int hw_closedev(int device_index)
6239c175	156	{
17e1afcb	157	/* Avoid compiler warnings. */
6239c175 UH	158	device_index = device_index;
	159
	160	/* Nothing needed so far. */
697785d1 UH	161
697785d1 UH	162	return SR_OK;
6239c175 UH	163	}
	164
	165	static void hw_cleanup(void)
	166	{
	167	/* Nothing needed so far. */
	168	}
	169
	170	static void *hw_get_device_info(int device_index, int device_info_id)
	171	{
a00ba012	172	struct sr_device_instance *sdi;
85b5af06 UH	173	void *info = NULL;
85b5af06 UH	174
c03ed397 UH	175	if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
c03ed397 UH	176	sr_err("demo: %s: sdi was NULL", __func__);
85b5af06	177	return NULL;
c03ed397	178	}
85b5af06	179
6239c175	180	switch (device_info_id) {
5a2326a7	181	case SR_DI_INSTANCE:
85b5af06	182	info = sdi;
6239c175	183	break;
5a2326a7	184	case SR_DI_NUM_PROBES:
6239c175 UH	185	info = GINT_TO_POINTER(NUM_PROBES);
6239c175 UH	186	break;
4bfbf9fc BV	187	case SR_DI_SAMPLERATES:
	188	info = &samplerates;
	189	break;
5a2326a7	190	case SR_DI_CUR_SAMPLERATE:
6239c175 UH	191	info = &cur_samplerate;
6239c175 UH	192	break;
5a2326a7	193	case SR_DI_PATTERNMODES:
c8f4624d	194	info = &pattern_strings;
e15f48c2	195	break;
6239c175 UH	196	}
	197
	198	return info;
	199	}
	200
	201	static int hw_get_status(int device_index)
	202	{
17e1afcb	203	/* Avoid compiler warnings. */
6239c175	204	device_index = device_index;
5096c6a6	205
5a2326a7	206	return SR_ST_ACTIVE;
6239c175 UH	207	}
	208
	209	static int *hw_get_capabilities(void)
	210	{
	211	return capabilities;
	212	}
	213
	214	static int hw_set_configuration(int device_index, int capability, void *value)
	215	{
	216	int ret;
e15f48c2	217	char *stropt;
6239c175	218
17e1afcb	219	/* Avoid compiler warnings. */
6239c175 UH	220	device_index = device_index;
6239c175 UH	221
5a2326a7	222	if (capability == SR_HWCAP_PROBECONFIG) {
d81d2933 BV	223	/* Nothing to do, but must be supported */
	224	ret = SR_OK;
	225	} else if (capability == SR_HWCAP_SAMPLERATE) {
68c12597	226	cur_samplerate = (uint64_t )value;
6f422264 UH	227	sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__,
6f422264 UH	228	cur_samplerate);
e46b8fb1	229	ret = SR_OK;
5a2326a7	230	} else if (capability == SR_HWCAP_LIMIT_SAMPLES) {
68c12597	231	limit_samples = (uint64_t )value;
6f422264 UH	232	sr_dbg("demo: %s: setting limit_samples to %" PRIu64, __func__,
6f422264 UH	233	limit_samples);
e46b8fb1	234	ret = SR_OK;
5a2326a7	235	} else if (capability == SR_HWCAP_LIMIT_MSEC) {
68c12597	236	limit_msec = (uint64_t )value;
6f422264 UH	237	sr_dbg("demo: %s: setting limit_msec to %" PRIu64, __func__,
6f422264 UH	238	limit_msec);
e46b8fb1	239	ret = SR_OK;
5a2326a7	240	} else if (capability == SR_HWCAP_PATTERN_MODE) {
e15f48c2	241	stropt = value;
c03ed397 UH	242	ret = SR_OK;
	243	if (!strcmp(stropt, "sigrok")) {
	244	default_pattern = PATTERN_SIGROK;
	245	} else if (!strcmp(stropt, "random")) {
c8f4624d	246	default_pattern = PATTERN_RANDOM;
e15f48c2	247	} else if (!strcmp(stropt, "incremental")) {
c8f4624d	248	default_pattern = PATTERN_INC;
c03ed397 UH	249	} else if (!strcmp(stropt, "all-low")) {
	250	default_pattern = PATTERN_ALL_LOW;
	251	} else if (!strcmp(stropt, "all-high")) {
	252	default_pattern = PATTERN_ALL_HIGH;
e15f48c2	253	} else {
e46b8fb1	254	ret = SR_ERR;
e15f48c2	255	}
c8f4624d UH	256	sr_dbg("demo: %s: setting pattern to %d", __func__,
c8f4624d UH	257	default_pattern);
6239c175	258	} else {
e46b8fb1	259	ret = SR_ERR;
6239c175 UH	260	}
	261
	262	return ret;
	263	}
	264
5096c6a6	265	static void samples_generator(uint8_t buf, uint64_t size, void data)
85b5af06	266	{
cddd1c5f	267	static uint64_t p = 0;
85b5af06	268	struct databag *mydata = data;
cddd1c5f	269	uint64_t i;
85b5af06	270
c03ed397	271	/* TODO: Needed? */
5096c6a6	272	memset(buf, 0, size);
85b5af06 UH	273
85b5af06 UH	274	switch (mydata->sample_generator) {
c03ed397	275	case PATTERN_SIGROK: /* sigrok pattern */
917e0e71	276	for (i = 0; i < size; i++) {
c8f4624d	277	*(buf + i) = ~(pattern_sigrok[p] >> 1);
917e0e71 BV	278	if (++p == 64)
	279	p = 0;
	280	}
	281	break;
c8f4624d	282	case PATTERN_RANDOM: /* Random */
5096c6a6 UH	283	for (i = 0; i < size; i++)
5096c6a6 UH	284	*(buf + i) = (uint8_t)(rand() & 0xff);
85b5af06	285	break;
c8f4624d	286	case PATTERN_INC: /* Simple increment */
5096c6a6	287	for (i = 0; i < size; i++)
85b5af06 UH	288	*(buf + i) = i;
85b5af06 UH	289	break;
c03ed397 UH	290	case PATTERN_ALL_LOW: /* All probes are low */
	291	for (i = 0; i < size; i++)
	292	*(buf + i) = 0x00;
	293	break;
	294	case PATTERN_ALL_HIGH: /* All probes are high */
	295	for (i = 0; i < size; i++)
	296	*(buf + i) = 0xff;
	297	break;
	298	default:
	299	/* TODO: Error handling. */
	300	break;
85b5af06 UH	301	}
	302	}
	303
	304	/* Thread function */
	305	static void thread_func(void *data)
	306	{
	307	struct databag *mydata = data;
	308	uint8_t buf[BUFSIZE];
	309	uint64_t nb_to_send = 0;
d35aaf02	310	int bytes_written;
1924f59f HE	311	double time_cur, time_last, time_diff;
	312
	313	time_last = g_timer_elapsed(mydata->timer, NULL);
85b5af06 UH	314
85b5af06 UH	315	while (thread_running) {
1924f59f HE	316	/* Rate control */
	317	time_cur = g_timer_elapsed(mydata->timer, NULL);
	318
	319	time_diff = time_cur - time_last;
	320	time_last = time_cur;
	321
	322	nb_to_send = cur_samplerate * time_diff;
	323
c03ed397	324	if (limit_samples) {
1924f59f	325	nb_to_send = MIN(nb_to_send,
c03ed397 UH	326	limit_samples - mydata->samples_counter);
c03ed397 UH	327	}
1924f59f HE	328
	329	/* Make sure we don't overflow. */
	330	nb_to_send = MIN(nb_to_send, BUFSIZE);
	331
	332	if (nb_to_send) {
	333	samples_generator(buf, nb_to_send, data);
	334	mydata->samples_counter += nb_to_send;
070befcd BV	335
070befcd BV	336	g_io_channel_write_chars(channels[1], (gchar *)&buf,
c03ed397	337	nb_to_send, (gsize *)&bytes_written, NULL);
b9cc3629 BV	338	}
b9cc3629 BV	339
1924f59f HE	340	/* Check if we're done. */
	341	if ((limit_msec && time_cur * 1000 > limit_msec) \|\|
	342	(limit_samples && mydata->samples_counter >= limit_samples))
	343	{
85b5af06 UH	344	close(mydata->pipe_fds[1]);
85b5af06 UH	345	thread_running = 0;
85b5af06 UH	346	}
85b5af06 UH	347
1924f59f	348	g_usleep(10);
85b5af06 UH	349	}
	350	}
	351
	352	/* Callback handling data */
	353	static int receive_data(int fd, int revents, void *user_data)
	354	{
b9c735a2	355	struct sr_datafeed_packet packet;
26ce0bbf	356	char c[BUFSIZE];
108a5bfb	357	gsize z;
1924f59f	358
26ce0bbf UH	359	/* Avoid compiler warnings. */
	360	fd = fd;
	361	revents = revents;
1924f59f HE	362
	363	do {
	364	g_io_channel_read_chars(channels[0],
070befcd	365	(gchar *)&c, BUFSIZE, &z, NULL);
1924f59f HE	366
1924f59f HE	367	if (z > 0) {
5a2326a7	368	packet.type = SR_DF_LOGIC;
1924f59f HE	369	packet.length = z;
	370	packet.unitsize = 1;
	371	packet.payload = c;
8a2efef2	372	sr_session_bus(user_data, &packet);
1924f59f HE	373	}
1924f59f HE	374	} while (z > 0);
85b5af06	375
c03ed397 UH	376	if (!thread_running && z <= 0) {
c03ed397 UH	377	/* Make sure we don't receive more packets. */
1924f59f	378	g_io_channel_close(channels[0]);
d35aaf02	379
1924f59f	380	/* Send last packet. */
5a2326a7	381	packet.type = SR_DF_END;
8a2efef2	382	sr_session_bus(user_data, &packet);
1924f59f HE	383
1924f59f HE	384	return FALSE;
85b5af06	385	}
1924f59f	386
85b5af06 UH	387	return TRUE;
	388	}
	389
6239c175 UH	390	static int hw_start_acquisition(int device_index, gpointer session_device_id)
6239c175 UH	391	{
b9c735a2 UH	392	struct sr_datafeed_packet *packet;
b9c735a2 UH	393	struct sr_datafeed_header *header;
85b5af06	394	struct databag *mydata;
6239c175	395
27a3a6fe UH	396	/* TODO: 'mydata' is never g_free()'d? */
	397	if (!(mydata = g_try_malloc(sizeof(struct databag)))) {
	398	sr_err("demo: %s: mydata malloc failed", __func__);
e46b8fb1	399	return SR_ERR_MALLOC;
27a3a6fe	400	}
85b5af06	401
c8f4624d	402	mydata->sample_generator = default_pattern;
85b5af06 UH	403	mydata->session_device_id = session_device_id;
	404	mydata->device_index = device_index;
	405	mydata->samples_counter = 0;
85b5af06	406
c03ed397 UH	407	if (pipe(mydata->pipe_fds)) {
	408	/* TODO: Better error message. */
	409	sr_err("demo: %s: pipe() failed", __func__);
e46b8fb1	410	return SR_ERR;
c03ed397	411	}
85b5af06	412
d35aaf02 UH	413	channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]);
	414	channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]);
	415
	416	/* Set channel encoding to binary (default is UTF-8). */
	417	g_io_channel_set_encoding(channels[0], NULL, NULL);
	418	g_io_channel_set_encoding(channels[1], NULL, NULL);
	419
	420	/* Make channels to unbuffered. */
	421	g_io_channel_set_buffered(channels[0], FALSE);
	422	g_io_channel_set_buffered(channels[1], FALSE);
	423
6f1be0a2 UH	424	sr_source_add(mydata->pipe_fds[0], G_IO_IN \| G_IO_ERR, 40,
6f1be0a2 UH	425	receive_data, session_device_id);
85b5af06 UH	426
	427	/* Run the demo thread. */
	428	g_thread_init(NULL);
c03ed397	429	/* This must to be done between g_thread_init() & g_thread_create(). */
1924f59f	430	mydata->timer = g_timer_new();
85b5af06 UH	431	thread_running = 1;
	432	my_thread =
	433	g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL);
c03ed397 UH	434	if (!my_thread) {
	435	sr_err("demo: %s: g_thread_create failed", __func__);
	436	return SR_ERR; /* TODO */
	437	}
6239c175	438
27a3a6fe UH	439	if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
27a3a6fe UH	440	sr_err("demo: %s: packet malloc failed", __func__);
e46b8fb1	441	return SR_ERR_MALLOC;
27a3a6fe UH	442	}
	443
	444	if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
	445	sr_err("demo: %s: header malloc failed", __func__);
	446	return SR_ERR_MALLOC;
	447	}
6239c175	448
5a2326a7	449	packet->type = SR_DF_HEADER;
b9c735a2	450	packet->length = sizeof(struct sr_datafeed_header);
6239c175 UH	451	packet->payload = (unsigned char *)header;
	452	header->feed_version = 1;
	453	gettimeofday(&header->starttime, NULL);
	454	header->samplerate = cur_samplerate;
5a2326a7	455	header->protocol_id = SR_PROTO_RAW;
c2616fb9 DR	456	header->num_logic_probes = NUM_PROBES;
c2616fb9 DR	457	header->num_analog_probes = 0;
8a2efef2	458	sr_session_bus(session_device_id, packet);
27a3a6fe UH	459	g_free(header);
27a3a6fe UH	460	g_free(packet);
6239c175	461
e46b8fb1	462	return SR_OK;
6239c175 UH	463	}
6239c175 UH	464
6239c175 UH	465	static void hw_stop_acquisition(int device_index, gpointer session_device_id)
6239c175 UH	466	{
17e1afcb	467	/* Avoid compiler warnings. */
6239c175	468	device_index = device_index;
1924f59f	469	session_device_id = session_device_id;
6239c175	470
1924f59f HE	471	/* Stop generate thread. */
1924f59f HE	472	thread_running = 0;
6239c175 UH	473	}
6239c175 UH	474
5c2d46d1	475	struct sr_device_plugin demo_plugin_info = {
e519ba86 UH	476	.name = "demo",
	477	.longname = "Demo driver and pattern generator",
	478	.api_version = 1,
	479	.init = hw_init,
	480	.cleanup = hw_cleanup,
86f5e3d8 UH	481	.opendev = hw_opendev,
86f5e3d8 UH	482	.closedev = hw_closedev,
e519ba86 UH	483	.get_device_info = hw_get_device_info,
	484	.get_status = hw_get_status,
	485	.get_capabilities = hw_get_capabilities,
	486	.set_configuration = hw_set_configuration,
	487	.start_acquisition = hw_start_acquisition,
	488	.stop_acquisition = hw_stop_acquisition,
6239c175	489	};