[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_data;
	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 period_ps = 5000000;
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_data);

static int hw_init(const char *deviceinfo)
{
	struct sr_device_instance *sdi;

	/* Avoid compiler warnings. */
	(void)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. */
	(void)device_index;

	/* Nothing needed so far. */

	return SR_OK;
}

static int hw_closedev(int device_index)
{
	/* Avoid compiler warnings. */
	(void)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. */
	(void)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. */
	(void)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;
		period_ps = 1000000000000 / cur_samplerate;
		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 */
		memset(buf, 0x00, size);
		break;
	case PATTERN_ALL_HIGH: /* All probes are high */
		memset(buf, 0xff, size);
		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 *session_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(channels[0],
				        (gchar *)&c, BUFSIZE, &z, NULL);

		if (z > 0) {
			packet.type = SR_DF_LOGIC;
			packet.payload = &logic;
			packet.timeoffset =  samples_received * period_ps;
			packet.duration = z * period_ps;
			logic.length = z;
			logic.unitsize = 1;
			logic.data = c;
			sr_session_bus(session_data, &packet);
			samples_received += z;
		}
	} 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(session_data, &packet);

		return FALSE;
	}

	return TRUE;
}

static int hw_start_acquisition(int device_index, gpointer session_data)
{
	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_data = session_data;
	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_data);

	/* 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->payload = header;
	packet->timeoffset = 0;
	packet->duration = 0;
	header->feed_version = 1;
	gettimeofday(&header->starttime, NULL);
	header->samplerate = cur_samplerate;
	header->num_logic_probes = NUM_PROBES;
	header->num_analog_probes = 0;
	sr_session_bus(session_data, packet);
	g_free(header);
	g_free(packet);

	return SR_OK;
}

static void hw_stop_acquisition(int device_index, gpointer session_data)
{
	/* Avoid compiler warnings. */
	(void)device_index;
	(void)session_data;

	/* 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;
9c939c51	76	gpointer session_data;
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);
9c939c51	119	static uint64_t period_ps = 5000000;
b9cc3629 BV	120	static uint64_t limit_samples = 0;
b9cc3629 BV	121	static uint64_t limit_msec = 0;
c8f4624d	122	static int default_pattern = PATTERN_SIGROK;
b9cc3629 BV	123	static GThread *my_thread;
b9cc3629 BV	124	static int thread_running;
6239c175	125
9c939c51	126	static void hw_stop_acquisition(int device_index, gpointer session_data);
6239c175	127
54ac5277	128	static int hw_init(const char *deviceinfo)
6239c175	129	{
a00ba012	130	struct sr_device_instance *sdi;
85b5af06	131
e15f48c2	132	/* Avoid compiler warnings. */
cb93f8a9	133	(void)deviceinfo;
85b5af06	134
5a2326a7	135	sdi = sr_device_instance_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL);
c03ed397 UH	136	if (!sdi) {
c03ed397 UH	137	sr_err("demo: %s: sr_device_instance_new failed", __func__);
85b5af06	138	return 0;
c03ed397	139	}
e15f48c2	140
85b5af06 UH	141	device_instances = g_slist_append(device_instances, sdi);
	142
	143	return 1;
6239c175 UH	144	}
	145
	146	static int hw_opendev(int device_index)
	147	{
17e1afcb	148	/* Avoid compiler warnings. */
cb93f8a9	149	(void)device_index;
6239c175 UH	150
6239c175 UH	151	/* Nothing needed so far. */
697785d1	152
e46b8fb1	153	return SR_OK;
6239c175 UH	154	}
6239c175 UH	155
697785d1	156	static int hw_closedev(int device_index)
6239c175	157	{
17e1afcb	158	/* Avoid compiler warnings. */
cb93f8a9	159	(void)device_index;
6239c175 UH	160
6239c175 UH	161	/* Nothing needed so far. */
697785d1 UH	162
697785d1 UH	163	return SR_OK;
6239c175 UH	164	}
	165
	166	static void hw_cleanup(void)
	167	{
	168	/* Nothing needed so far. */
	169	}
	170
	171	static void *hw_get_device_info(int device_index, int device_info_id)
	172	{
a00ba012	173	struct sr_device_instance *sdi;
85b5af06 UH	174	void *info = NULL;
85b5af06 UH	175
c03ed397 UH	176	if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
c03ed397 UH	177	sr_err("demo: %s: sdi was NULL", __func__);
85b5af06	178	return NULL;
c03ed397	179	}
85b5af06	180
6239c175	181	switch (device_info_id) {
5a2326a7	182	case SR_DI_INSTANCE:
85b5af06	183	info = sdi;
6239c175	184	break;
5a2326a7	185	case SR_DI_NUM_PROBES:
6239c175 UH	186	info = GINT_TO_POINTER(NUM_PROBES);
6239c175 UH	187	break;
4bfbf9fc BV	188	case SR_DI_SAMPLERATES:
	189	info = &samplerates;
	190	break;
5a2326a7	191	case SR_DI_CUR_SAMPLERATE:
6239c175 UH	192	info = &cur_samplerate;
6239c175 UH	193	break;
5a2326a7	194	case SR_DI_PATTERNMODES:
c8f4624d	195	info = &pattern_strings;
e15f48c2	196	break;
6239c175 UH	197	}
	198
	199	return info;
	200	}
	201
	202	static int hw_get_status(int device_index)
	203	{
17e1afcb	204	/* Avoid compiler warnings. */
cb93f8a9	205	(void)device_index;
5096c6a6	206
5a2326a7	207	return SR_ST_ACTIVE;
6239c175 UH	208	}
	209
	210	static int *hw_get_capabilities(void)
	211	{
	212	return capabilities;
	213	}
	214
	215	static int hw_set_configuration(int device_index, int capability, void *value)
	216	{
	217	int ret;
e15f48c2	218	char *stropt;
6239c175	219
17e1afcb	220	/* Avoid compiler warnings. */
cb93f8a9	221	(void)device_index;
6239c175	222
5a2326a7	223	if (capability == SR_HWCAP_PROBECONFIG) {
d81d2933 BV	224	/* Nothing to do, but must be supported */
	225	ret = SR_OK;
	226	} else if (capability == SR_HWCAP_SAMPLERATE) {
68c12597	227	cur_samplerate = (uint64_t )value;
9c939c51	228	period_ps = 1000000000000 / cur_samplerate;
6f422264 UH	229	sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__,
6f422264 UH	230	cur_samplerate);
e46b8fb1	231	ret = SR_OK;
5a2326a7	232	} else if (capability == SR_HWCAP_LIMIT_SAMPLES) {
68c12597	233	limit_samples = (uint64_t )value;
6f422264 UH	234	sr_dbg("demo: %s: setting limit_samples to %" PRIu64, __func__,
6f422264 UH	235	limit_samples);
e46b8fb1	236	ret = SR_OK;
5a2326a7	237	} else if (capability == SR_HWCAP_LIMIT_MSEC) {
68c12597	238	limit_msec = (uint64_t )value;
6f422264 UH	239	sr_dbg("demo: %s: setting limit_msec to %" PRIu64, __func__,
6f422264 UH	240	limit_msec);
e46b8fb1	241	ret = SR_OK;
5a2326a7	242	} else if (capability == SR_HWCAP_PATTERN_MODE) {
e15f48c2	243	stropt = value;
c03ed397 UH	244	ret = SR_OK;
	245	if (!strcmp(stropt, "sigrok")) {
	246	default_pattern = PATTERN_SIGROK;
	247	} else if (!strcmp(stropt, "random")) {
c8f4624d	248	default_pattern = PATTERN_RANDOM;
e15f48c2	249	} else if (!strcmp(stropt, "incremental")) {
c8f4624d	250	default_pattern = PATTERN_INC;
c03ed397 UH	251	} else if (!strcmp(stropt, "all-low")) {
	252	default_pattern = PATTERN_ALL_LOW;
	253	} else if (!strcmp(stropt, "all-high")) {
	254	default_pattern = PATTERN_ALL_HIGH;
e15f48c2	255	} else {
e46b8fb1	256	ret = SR_ERR;
e15f48c2	257	}
c8f4624d UH	258	sr_dbg("demo: %s: setting pattern to %d", __func__,
c8f4624d UH	259	default_pattern);
6239c175	260	} else {
e46b8fb1	261	ret = SR_ERR;
6239c175 UH	262	}
	263
	264	return ret;
	265	}
	266
5096c6a6	267	static void samples_generator(uint8_t buf, uint64_t size, void data)
85b5af06	268	{
cddd1c5f	269	static uint64_t p = 0;
85b5af06	270	struct databag *mydata = data;
cddd1c5f	271	uint64_t i;
85b5af06	272
c03ed397	273	/* TODO: Needed? */
5096c6a6	274	memset(buf, 0, size);
85b5af06 UH	275
85b5af06 UH	276	switch (mydata->sample_generator) {
c03ed397	277	case PATTERN_SIGROK: /* sigrok pattern */
917e0e71	278	for (i = 0; i < size; i++) {
c8f4624d	279	*(buf + i) = ~(pattern_sigrok[p] >> 1);
917e0e71 BV	280	if (++p == 64)
	281	p = 0;
	282	}
	283	break;
c8f4624d	284	case PATTERN_RANDOM: /* Random */
5096c6a6 UH	285	for (i = 0; i < size; i++)
5096c6a6 UH	286	*(buf + i) = (uint8_t)(rand() & 0xff);
85b5af06	287	break;
c8f4624d	288	case PATTERN_INC: /* Simple increment */
5096c6a6	289	for (i = 0; i < size; i++)
85b5af06 UH	290	*(buf + i) = i;
85b5af06 UH	291	break;
c03ed397	292	case PATTERN_ALL_LOW: /* All probes are low */
5a9660dd	293	memset(buf, 0x00, size);
c03ed397 UH	294	break;
c03ed397 UH	295	case PATTERN_ALL_HIGH: /* All probes are high */
5a9660dd	296	memset(buf, 0xff, size);
c03ed397 UH	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 */
9c939c51	353	static int receive_data(int fd, int revents, void *session_data)
85b5af06	354	{
b9c735a2	355	struct sr_datafeed_packet packet;
9c939c51 BV	356	struct sr_datafeed_logic logic;
	357	static uint64_t samples_received = 0;
	358	unsigned char c[BUFSIZE];
108a5bfb	359	gsize z;
1924f59f	360
26ce0bbf	361	/* Avoid compiler warnings. */
cb93f8a9 UH	362	(void)fd;
cb93f8a9 UH	363	(void)revents;
1924f59f HE	364
	365	do {
	366	g_io_channel_read_chars(channels[0],
070befcd	367	(gchar *)&c, BUFSIZE, &z, NULL);
1924f59f HE	368
1924f59f HE	369	if (z > 0) {
5a2326a7	370	packet.type = SR_DF_LOGIC;
9c939c51 BV	371	packet.payload = &logic;
	372	packet.timeoffset = samples_received * period_ps;
	373	packet.duration = z * period_ps;
	374	logic.length = z;
	375	logic.unitsize = 1;
	376	logic.data = c;
	377	sr_session_bus(session_data, &packet);
	378	samples_received += z;
1924f59f HE	379	}
1924f59f HE	380	} while (z > 0);
85b5af06	381
c03ed397 UH	382	if (!thread_running && z <= 0) {
c03ed397 UH	383	/* Make sure we don't receive more packets. */
1924f59f	384	g_io_channel_close(channels[0]);
d35aaf02	385
1924f59f	386	/* Send last packet. */
5a2326a7	387	packet.type = SR_DF_END;
9c939c51	388	sr_session_bus(session_data, &packet);
1924f59f HE	389
1924f59f HE	390	return FALSE;
85b5af06	391	}
1924f59f	392
85b5af06 UH	393	return TRUE;
	394	}
	395
9c939c51	396	static int hw_start_acquisition(int device_index, gpointer session_data)
6239c175	397	{
b9c735a2 UH	398	struct sr_datafeed_packet *packet;
b9c735a2 UH	399	struct sr_datafeed_header *header;
85b5af06	400	struct databag *mydata;
6239c175	401
27a3a6fe UH	402	/* TODO: 'mydata' is never g_free()'d? */
	403	if (!(mydata = g_try_malloc(sizeof(struct databag)))) {
	404	sr_err("demo: %s: mydata malloc failed", __func__);
e46b8fb1	405	return SR_ERR_MALLOC;
27a3a6fe	406	}
85b5af06	407
c8f4624d	408	mydata->sample_generator = default_pattern;
9c939c51	409	mydata->session_data = session_data;
85b5af06 UH	410	mydata->device_index = device_index;
85b5af06 UH	411	mydata->samples_counter = 0;
85b5af06	412
c03ed397 UH	413	if (pipe(mydata->pipe_fds)) {
	414	/* TODO: Better error message. */
	415	sr_err("demo: %s: pipe() failed", __func__);
e46b8fb1	416	return SR_ERR;
c03ed397	417	}
85b5af06	418
d35aaf02 UH	419	channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]);
	420	channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]);
	421
	422	/* Set channel encoding to binary (default is UTF-8). */
	423	g_io_channel_set_encoding(channels[0], NULL, NULL);
	424	g_io_channel_set_encoding(channels[1], NULL, NULL);
	425
	426	/* Make channels to unbuffered. */
	427	g_io_channel_set_buffered(channels[0], FALSE);
	428	g_io_channel_set_buffered(channels[1], FALSE);
	429
6f1be0a2	430	sr_source_add(mydata->pipe_fds[0], G_IO_IN \| G_IO_ERR, 40,
9c939c51	431	receive_data, session_data);
85b5af06 UH	432
	433	/* Run the demo thread. */
	434	g_thread_init(NULL);
c03ed397	435	/* This must to be done between g_thread_init() & g_thread_create(). */
1924f59f	436	mydata->timer = g_timer_new();
85b5af06 UH	437	thread_running = 1;
	438	my_thread =
	439	g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL);
c03ed397 UH	440	if (!my_thread) {
	441	sr_err("demo: %s: g_thread_create failed", __func__);
	442	return SR_ERR; /* TODO */
	443	}
6239c175	444
27a3a6fe UH	445	if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
27a3a6fe UH	446	sr_err("demo: %s: packet malloc failed", __func__);
e46b8fb1	447	return SR_ERR_MALLOC;
27a3a6fe UH	448	}
	449
	450	if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
	451	sr_err("demo: %s: header malloc failed", __func__);
	452	return SR_ERR_MALLOC;
	453	}
6239c175	454
5a2326a7	455	packet->type = SR_DF_HEADER;
9c939c51 BV	456	packet->payload = header;
	457	packet->timeoffset = 0;
	458	packet->duration = 0;
6239c175 UH	459	header->feed_version = 1;
	460	gettimeofday(&header->starttime, NULL);
	461	header->samplerate = cur_samplerate;
c2616fb9 DR	462	header->num_logic_probes = NUM_PROBES;
c2616fb9 DR	463	header->num_analog_probes = 0;
9c939c51	464	sr_session_bus(session_data, packet);
27a3a6fe UH	465	g_free(header);
27a3a6fe UH	466	g_free(packet);
6239c175	467
e46b8fb1	468	return SR_OK;
6239c175 UH	469	}
6239c175 UH	470
9c939c51	471	static void hw_stop_acquisition(int device_index, gpointer session_data)
6239c175	472	{
17e1afcb	473	/* Avoid compiler warnings. */
cb93f8a9 UH	474	(void)device_index;
cb93f8a9 UH	475	(void)session_data;
6239c175	476
1924f59f HE	477	/* Stop generate thread. */
1924f59f HE	478	thread_running = 0;
6239c175 UH	479	}
6239c175 UH	480
5c2d46d1	481	struct sr_device_plugin demo_plugin_info = {
e519ba86 UH	482	.name = "demo",
	483	.longname = "Demo driver and pattern generator",
	484	.api_version = 1,
	485	.init = hw_init,
	486	.cleanup = hw_cleanup,
86f5e3d8 UH	487	.opendev = hw_opendev,
86f5e3d8 UH	488	.closedev = hw_closedev,
e519ba86 UH	489	.get_device_info = hw_get_device_info,
	490	.get_status = hw_get_status,
	491	.get_capabilities = hw_get_capabilities,
	492	.set_configuration = hw_set_configuration,
	493	.start_acquisition = hw_start_acquisition,
	494	.stop_acquisition = hw_stop_acquisition,
6239c175	495	};