[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>
#ifdef _WIN32
#include <io.h>
#include <fcntl.h>
#define pipe(fds) _pipe(fds, 4096, _O_BINARY)
#endif
#include "sigrok.h"
#include "sigrok-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. */
SR_PRIV 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_DEMO_DEVICE,
	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 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,
};

/* 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 int 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_PROBE_NAMES:
		info = probe_names;
		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;
		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;
			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;
	header->feed_version = 1;
	gettimeofday(&header->starttime, NULL);
	header->samplerate = cur_samplerate;
	header->num_logic_probes = NUM_PROBES;
	sr_session_bus(session_data, packet);
	g_free(header);
	g_free(packet);

	return SR_OK;
}

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

	/* Stop generate thread. */
	thread_running = 0;

	return SR_OK;
}

SR_PRIV 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	24	#include <string.h>
d35aaf02 UH	25	#ifdef _WIN32
	26	#include <io.h>
	27	#include <fcntl.h>
	28	#define pipe(fds) _pipe(fds, 4096, _O_BINARY)
	29	#endif
b7f09cf8 UH	30	#include "sigrok.h"
b7f09cf8 UH	31	#include "sigrok-internal.h"
6239c175	32
c03ed397	33	/* TODO: Number of probes should be configurable. */
e15f48c2	34	#define NUM_PROBES 8
c03ed397	35
e15f48c2	36	#define DEMONAME "Demo device"
c03ed397 UH	37
	38	/* The size of chunks to send through the session bus. */
	39	/* TODO: Should be configurable. */
e15f48c2	40	#define BUFSIZE 4096
85b5af06	41
0d31276b	42	/* Supported patterns which we can generate */
e15f48c2	43	enum {
0d31276b UH	44	/**
	45	* Pattern which spells "sigrok" using '0's (with '1's as "background")
	46	* when displayed using the 'bits' output format.
	47	*/
c8f4624d	48	PATTERN_SIGROK,
0d31276b	49
c03ed397	50	/** Pattern which consists of (pseudo-)random values on all probes. */
c8f4624d	51	PATTERN_RANDOM,
0d31276b UH	52
	53	/**
	54	* Pattern which consists of incrementing numbers.
	55	* TODO: Better description.
	56	*/
c8f4624d	57	PATTERN_INC,
c03ed397 UH	58
	59	/** Pattern where all probes have a low logic state. */
	60	PATTERN_ALL_LOW,
	61
	62	/** Pattern where all probes have a high logic state. */
	63	PATTERN_ALL_HIGH,
e15f48c2	64	};
85b5af06	65
29cbfeaf	66	/* FIXME: Should not be global. */
3d2efd7d	67	SR_PRIV GIOChannel *channels[2];
d35aaf02	68
e15f48c2 BV	69	struct databag {
	70	int pipe_fds[2];
	71	uint8_t sample_generator;
	72	uint8_t thread_running;
	73	uint64_t samples_counter;
	74	int device_index;
9c939c51	75	gpointer session_data;
b9cc3629	76	GTimer *timer;
e15f48c2	77	};
85b5af06	78
6239c175	79	static int capabilities[] = {
5a2326a7	80	SR_HWCAP_LOGIC_ANALYZER,
a141db8c	81	SR_HWCAP_DEMO_DEVICE,
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
464d12c7 KS	105	static const char *probe_names[NUM_PROBES + 1] = {
	106	"0",
	107	"1",
	108	"2",
	109	"3",
	110	"4",
	111	"5",
	112	"6",
	113	"7",
	114	NULL,
	115	};
	116
c8f4624d	117	static uint8_t pattern_sigrok[] = {
917e0e71 BV	118	0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00,
	119	0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00,
	120	0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00,
	121	0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00,
	122	0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00,
	123	0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00,
	124	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	125	0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	126	};
	127
a00ba012	128	/* List of struct sr_device_instance, maintained by opendev()/closedev(). */
85b5af06	129	static GSList *device_instances = NULL;
59df0c77	130	static uint64_t cur_samplerate = SR_KHZ(200);
b9cc3629 BV	131	static uint64_t limit_samples = 0;
b9cc3629 BV	132	static uint64_t limit_msec = 0;
c8f4624d	133	static int default_pattern = PATTERN_SIGROK;
b9cc3629 BV	134	static GThread *my_thread;
b9cc3629 BV	135	static int thread_running;
6239c175	136
3010f21c	137	static int hw_stop_acquisition(int device_index, gpointer session_data);
6239c175	138
54ac5277	139	static int hw_init(const char *deviceinfo)
6239c175	140	{
a00ba012	141	struct sr_device_instance *sdi;
85b5af06	142
e15f48c2	143	/* Avoid compiler warnings. */
cb93f8a9	144	(void)deviceinfo;
85b5af06	145
5a2326a7	146	sdi = sr_device_instance_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL);
c03ed397 UH	147	if (!sdi) {
c03ed397 UH	148	sr_err("demo: %s: sr_device_instance_new failed", __func__);
85b5af06	149	return 0;
c03ed397	150	}
e15f48c2	151
85b5af06 UH	152	device_instances = g_slist_append(device_instances, sdi);
	153
	154	return 1;
6239c175 UH	155	}
	156
	157	static int hw_opendev(int device_index)
	158	{
17e1afcb	159	/* Avoid compiler warnings. */
cb93f8a9	160	(void)device_index;
6239c175 UH	161
6239c175 UH	162	/* Nothing needed so far. */
697785d1	163
e46b8fb1	164	return SR_OK;
6239c175 UH	165	}
6239c175 UH	166
697785d1	167	static int hw_closedev(int device_index)
6239c175	168	{
17e1afcb	169	/* Avoid compiler warnings. */
cb93f8a9	170	(void)device_index;
6239c175 UH	171
6239c175 UH	172	/* Nothing needed so far. */
697785d1 UH	173
697785d1 UH	174	return SR_OK;
6239c175 UH	175	}
	176
	177	static void hw_cleanup(void)
	178	{
	179	/* Nothing needed so far. */
	180	}
	181
	182	static void *hw_get_device_info(int device_index, int device_info_id)
	183	{
a00ba012	184	struct sr_device_instance *sdi;
85b5af06 UH	185	void *info = NULL;
85b5af06 UH	186
c03ed397 UH	187	if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
c03ed397 UH	188	sr_err("demo: %s: sdi was NULL", __func__);
85b5af06	189	return NULL;
c03ed397	190	}
85b5af06	191
6239c175	192	switch (device_info_id) {
5a2326a7	193	case SR_DI_INSTANCE:
85b5af06	194	info = sdi;
6239c175	195	break;
5a2326a7	196	case SR_DI_NUM_PROBES:
6239c175 UH	197	info = GINT_TO_POINTER(NUM_PROBES);
6239c175 UH	198	break;
464d12c7 KS	199	case SR_DI_PROBE_NAMES:
	200	info = probe_names;
	201	break;
4bfbf9fc BV	202	case SR_DI_SAMPLERATES:
	203	info = &samplerates;
	204	break;
5a2326a7	205	case SR_DI_CUR_SAMPLERATE:
6239c175 UH	206	info = &cur_samplerate;
6239c175 UH	207	break;
5a2326a7	208	case SR_DI_PATTERNMODES:
c8f4624d	209	info = &pattern_strings;
e15f48c2	210	break;
6239c175 UH	211	}
	212
	213	return info;
	214	}
	215
	216	static int hw_get_status(int device_index)
	217	{
17e1afcb	218	/* Avoid compiler warnings. */
cb93f8a9	219	(void)device_index;
5096c6a6	220
5a2326a7	221	return SR_ST_ACTIVE;
6239c175 UH	222	}
	223
	224	static int *hw_get_capabilities(void)
	225	{
	226	return capabilities;
	227	}
	228
	229	static int hw_set_configuration(int device_index, int capability, void *value)
	230	{
	231	int ret;
e15f48c2	232	char *stropt;
6239c175	233
17e1afcb	234	/* Avoid compiler warnings. */
cb93f8a9	235	(void)device_index;
6239c175	236
5a2326a7	237	if (capability == SR_HWCAP_PROBECONFIG) {
d81d2933 BV	238	/* Nothing to do, but must be supported */
	239	ret = SR_OK;
	240	} else if (capability == SR_HWCAP_SAMPLERATE) {
68c12597	241	cur_samplerate = (uint64_t )value;
6f422264 UH	242	sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__,
6f422264 UH	243	cur_samplerate);
e46b8fb1	244	ret = SR_OK;
5a2326a7	245	} else if (capability == SR_HWCAP_LIMIT_SAMPLES) {
68c12597	246	limit_samples = (uint64_t )value;
6f422264 UH	247	sr_dbg("demo: %s: setting limit_samples to %" PRIu64, __func__,
6f422264 UH	248	limit_samples);
e46b8fb1	249	ret = SR_OK;
5a2326a7	250	} else if (capability == SR_HWCAP_LIMIT_MSEC) {
68c12597	251	limit_msec = (uint64_t )value;
6f422264 UH	252	sr_dbg("demo: %s: setting limit_msec to %" PRIu64, __func__,
6f422264 UH	253	limit_msec);
e46b8fb1	254	ret = SR_OK;
5a2326a7	255	} else if (capability == SR_HWCAP_PATTERN_MODE) {
e15f48c2	256	stropt = value;
c03ed397 UH	257	ret = SR_OK;
	258	if (!strcmp(stropt, "sigrok")) {
	259	default_pattern = PATTERN_SIGROK;
	260	} else if (!strcmp(stropt, "random")) {
c8f4624d	261	default_pattern = PATTERN_RANDOM;
e15f48c2	262	} else if (!strcmp(stropt, "incremental")) {
c8f4624d	263	default_pattern = PATTERN_INC;
c03ed397 UH	264	} else if (!strcmp(stropt, "all-low")) {
	265	default_pattern = PATTERN_ALL_LOW;
	266	} else if (!strcmp(stropt, "all-high")) {
	267	default_pattern = PATTERN_ALL_HIGH;
e15f48c2	268	} else {
e46b8fb1	269	ret = SR_ERR;
e15f48c2	270	}
c8f4624d UH	271	sr_dbg("demo: %s: setting pattern to %d", __func__,
c8f4624d UH	272	default_pattern);
6239c175	273	} else {
e46b8fb1	274	ret = SR_ERR;
6239c175 UH	275	}
	276
	277	return ret;
	278	}
	279
5096c6a6	280	static void samples_generator(uint8_t buf, uint64_t size, void data)
85b5af06	281	{
cddd1c5f	282	static uint64_t p = 0;
85b5af06	283	struct databag *mydata = data;
cddd1c5f	284	uint64_t i;
85b5af06	285
c03ed397	286	/* TODO: Needed? */
5096c6a6	287	memset(buf, 0, size);
85b5af06 UH	288
85b5af06 UH	289	switch (mydata->sample_generator) {
c03ed397	290	case PATTERN_SIGROK: /* sigrok pattern */
917e0e71	291	for (i = 0; i < size; i++) {
c8f4624d	292	*(buf + i) = ~(pattern_sigrok[p] >> 1);
917e0e71 BV	293	if (++p == 64)
	294	p = 0;
	295	}
	296	break;
c8f4624d	297	case PATTERN_RANDOM: /* Random */
5096c6a6 UH	298	for (i = 0; i < size; i++)
5096c6a6 UH	299	*(buf + i) = (uint8_t)(rand() & 0xff);
85b5af06	300	break;
c8f4624d	301	case PATTERN_INC: /* Simple increment */
5096c6a6	302	for (i = 0; i < size; i++)
85b5af06 UH	303	*(buf + i) = i;
85b5af06 UH	304	break;
c03ed397	305	case PATTERN_ALL_LOW: /* All probes are low */
5a9660dd	306	memset(buf, 0x00, size);
c03ed397 UH	307	break;
c03ed397 UH	308	case PATTERN_ALL_HIGH: /* All probes are high */
5a9660dd	309	memset(buf, 0xff, size);
c03ed397 UH	310	break;
	311	default:
	312	/* TODO: Error handling. */
	313	break;
85b5af06 UH	314	}
	315	}
	316
	317	/* Thread function */
	318	static void thread_func(void *data)
	319	{
	320	struct databag *mydata = data;
	321	uint8_t buf[BUFSIZE];
	322	uint64_t nb_to_send = 0;
d35aaf02	323	int bytes_written;
1924f59f HE	324	double time_cur, time_last, time_diff;
	325
	326	time_last = g_timer_elapsed(mydata->timer, NULL);
85b5af06 UH	327
85b5af06 UH	328	while (thread_running) {
1924f59f HE	329	/* Rate control */
	330	time_cur = g_timer_elapsed(mydata->timer, NULL);
	331
	332	time_diff = time_cur - time_last;
	333	time_last = time_cur;
	334
	335	nb_to_send = cur_samplerate * time_diff;
	336
c03ed397	337	if (limit_samples) {
1924f59f	338	nb_to_send = MIN(nb_to_send,
c03ed397 UH	339	limit_samples - mydata->samples_counter);
c03ed397 UH	340	}
1924f59f HE	341
	342	/* Make sure we don't overflow. */
	343	nb_to_send = MIN(nb_to_send, BUFSIZE);
	344
	345	if (nb_to_send) {
	346	samples_generator(buf, nb_to_send, data);
	347	mydata->samples_counter += nb_to_send;
070befcd BV	348
070befcd BV	349	g_io_channel_write_chars(channels[1], (gchar *)&buf,
c03ed397	350	nb_to_send, (gsize *)&bytes_written, NULL);
b9cc3629 BV	351	}
b9cc3629 BV	352
1924f59f HE	353	/* Check if we're done. */
	354	if ((limit_msec && time_cur * 1000 > limit_msec) \|\|
	355	(limit_samples && mydata->samples_counter >= limit_samples))
	356	{
85b5af06 UH	357	close(mydata->pipe_fds[1]);
85b5af06 UH	358	thread_running = 0;
85b5af06 UH	359	}
85b5af06 UH	360
1924f59f	361	g_usleep(10);
85b5af06 UH	362	}
	363	}
	364
	365	/* Callback handling data */
9c939c51	366	static int receive_data(int fd, int revents, void *session_data)
85b5af06	367	{
b9c735a2	368	struct sr_datafeed_packet packet;
9c939c51 BV	369	struct sr_datafeed_logic logic;
	370	static uint64_t samples_received = 0;
	371	unsigned char c[BUFSIZE];
108a5bfb	372	gsize z;
1924f59f	373
26ce0bbf	374	/* Avoid compiler warnings. */
cb93f8a9 UH	375	(void)fd;
cb93f8a9 UH	376	(void)revents;
1924f59f HE	377
	378	do {
	379	g_io_channel_read_chars(channels[0],
070befcd	380	(gchar *)&c, BUFSIZE, &z, NULL);
1924f59f HE	381
1924f59f HE	382	if (z > 0) {
5a2326a7	383	packet.type = SR_DF_LOGIC;
9c939c51	384	packet.payload = &logic;
9c939c51 BV	385	logic.length = z;
	386	logic.unitsize = 1;
	387	logic.data = c;
	388	sr_session_bus(session_data, &packet);
	389	samples_received += z;
1924f59f HE	390	}
1924f59f HE	391	} while (z > 0);
85b5af06	392
c03ed397 UH	393	if (!thread_running && z <= 0) {
c03ed397 UH	394	/* Make sure we don't receive more packets. */
1924f59f	395	g_io_channel_close(channels[0]);
d35aaf02	396
1924f59f	397	/* Send last packet. */
5a2326a7	398	packet.type = SR_DF_END;
9c939c51	399	sr_session_bus(session_data, &packet);
1924f59f HE	400
1924f59f HE	401	return FALSE;
85b5af06	402	}
1924f59f	403
85b5af06 UH	404	return TRUE;
	405	}
	406
9c939c51	407	static int hw_start_acquisition(int device_index, gpointer session_data)
6239c175	408	{
b9c735a2 UH	409	struct sr_datafeed_packet *packet;
b9c735a2 UH	410	struct sr_datafeed_header *header;
85b5af06	411	struct databag *mydata;
6239c175	412
27a3a6fe UH	413	/* TODO: 'mydata' is never g_free()'d? */
	414	if (!(mydata = g_try_malloc(sizeof(struct databag)))) {
	415	sr_err("demo: %s: mydata malloc failed", __func__);
e46b8fb1	416	return SR_ERR_MALLOC;
27a3a6fe	417	}
85b5af06	418
c8f4624d	419	mydata->sample_generator = default_pattern;
9c939c51	420	mydata->session_data = session_data;
85b5af06 UH	421	mydata->device_index = device_index;
85b5af06 UH	422	mydata->samples_counter = 0;
85b5af06	423
c03ed397 UH	424	if (pipe(mydata->pipe_fds)) {
	425	/* TODO: Better error message. */
	426	sr_err("demo: %s: pipe() failed", __func__);
e46b8fb1	427	return SR_ERR;
c03ed397	428	}
85b5af06	429
d35aaf02 UH	430	channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]);
	431	channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]);
	432
	433	/* Set channel encoding to binary (default is UTF-8). */
	434	g_io_channel_set_encoding(channels[0], NULL, NULL);
	435	g_io_channel_set_encoding(channels[1], NULL, NULL);
	436
	437	/* Make channels to unbuffered. */
	438	g_io_channel_set_buffered(channels[0], FALSE);
	439	g_io_channel_set_buffered(channels[1], FALSE);
	440
6f1be0a2	441	sr_source_add(mydata->pipe_fds[0], G_IO_IN \| G_IO_ERR, 40,
9c939c51	442	receive_data, session_data);
85b5af06 UH	443
	444	/* Run the demo thread. */
	445	g_thread_init(NULL);
c03ed397	446	/* This must to be done between g_thread_init() & g_thread_create(). */
1924f59f	447	mydata->timer = g_timer_new();
85b5af06 UH	448	thread_running = 1;
	449	my_thread =
	450	g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL);
c03ed397 UH	451	if (!my_thread) {
	452	sr_err("demo: %s: g_thread_create failed", __func__);
	453	return SR_ERR; /* TODO */
	454	}
6239c175	455
27a3a6fe UH	456	if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
27a3a6fe UH	457	sr_err("demo: %s: packet malloc failed", __func__);
e46b8fb1	458	return SR_ERR_MALLOC;
27a3a6fe UH	459	}
	460
	461	if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
	462	sr_err("demo: %s: header malloc failed", __func__);
	463	return SR_ERR_MALLOC;
	464	}
6239c175	465
5a2326a7	466	packet->type = SR_DF_HEADER;
9c939c51	467	packet->payload = header;
6239c175 UH	468	header->feed_version = 1;
	469	gettimeofday(&header->starttime, NULL);
	470	header->samplerate = cur_samplerate;
c2616fb9	471	header->num_logic_probes = NUM_PROBES;
9c939c51	472	sr_session_bus(session_data, packet);
27a3a6fe UH	473	g_free(header);
27a3a6fe UH	474	g_free(packet);
6239c175	475
e46b8fb1	476	return SR_OK;
6239c175 UH	477	}
6239c175 UH	478
3010f21c	479	static int hw_stop_acquisition(int device_index, gpointer session_data)
6239c175	480	{
17e1afcb	481	/* Avoid compiler warnings. */
cb93f8a9 UH	482	(void)device_index;
cb93f8a9 UH	483	(void)session_data;
6239c175	484
1924f59f HE	485	/* Stop generate thread. */
1924f59f HE	486	thread_running = 0;
3010f21c UH	487
3010f21c UH	488	return SR_OK;
6239c175 UH	489	}
6239c175 UH	490
ca070ed9	491	SR_PRIV struct sr_device_plugin demo_plugin_info = {
e519ba86 UH	492	.name = "demo",
	493	.longname = "Demo driver and pattern generator",
	494	.api_version = 1,
	495	.init = hw_init,
	496	.cleanup = hw_cleanup,
86f5e3d8 UH	497	.opendev = hw_opendev,
86f5e3d8 UH	498	.closedev = hw_closedev,
e519ba86 UH	499	.get_device_info = hw_get_device_info,
	500	.get_status = hw_get_status,
	501	.get_capabilities = hw_get_capabilities,
	502	.set_configuration = hw_set_configuration,
	503	.start_acquisition = hw_start_acquisition,
	504	.stop_acquisition = hw_stop_acquisition,
6239c175	505	};