[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 "config.h"
#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. */
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 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_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;
		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	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
6239c175	30	#include "config.h"
b7f09cf8 UH	31	#include "sigrok.h"
b7f09cf8 UH	32	#include "sigrok-internal.h"
6239c175	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,
a141db8c	82	SR_HWCAP_DEMO_DEVICE,
4bfbf9fc	83	SR_HWCAP_SAMPLERATE,
5a2326a7 UH	84	SR_HWCAP_PATTERN_MODE,
	85	SR_HWCAP_LIMIT_SAMPLES,
	86	SR_HWCAP_LIMIT_MSEC,
	87	SR_HWCAP_CONTINUOUS,
6239c175 UH	88	};
6239c175 UH	89
4bfbf9fc	90	static struct sr_samplerates samplerates = {
c9140419	91	SR_HZ(1),
59df0c77	92	SR_GHZ(1),
c9140419	93	SR_HZ(1),
4bfbf9fc BV	94	NULL,
	95	};
	96
c8f4624d	97	static const char *pattern_strings[] = {
c03ed397	98	"sigrok",
e15f48c2 BV	99	"random",
e15f48c2 BV	100	"incremental",
c03ed397 UH	101	"all-low",
c03ed397 UH	102	"all-high",
02440dd8	103	NULL,
85b5af06 UH	104	};
85b5af06 UH	105
464d12c7 KS	106	static const char *probe_names[NUM_PROBES + 1] = {
	107	"0",
	108	"1",
	109	"2",
	110	"3",
	111	"4",
	112	"5",
	113	"6",
	114	"7",
	115	NULL,
	116	};
	117
c8f4624d	118	static uint8_t pattern_sigrok[] = {
917e0e71 BV	119	0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00,
	120	0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00,
	121	0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00,
	122	0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00,
	123	0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00,
	124	0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00,
	125	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	126	0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	127	};
	128
a00ba012	129	/* List of struct sr_device_instance, maintained by opendev()/closedev(). */
85b5af06	130	static GSList *device_instances = NULL;
59df0c77	131	static uint64_t cur_samplerate = SR_KHZ(200);
9c939c51	132	static uint64_t period_ps = 5000000;
b9cc3629 BV	133	static uint64_t limit_samples = 0;
b9cc3629 BV	134	static uint64_t limit_msec = 0;
c8f4624d	135	static int default_pattern = PATTERN_SIGROK;
b9cc3629 BV	136	static GThread *my_thread;
b9cc3629 BV	137	static int thread_running;
6239c175	138
9c939c51	139	static void hw_stop_acquisition(int device_index, gpointer session_data);
6239c175	140
54ac5277	141	static int hw_init(const char *deviceinfo)
6239c175	142	{
a00ba012	143	struct sr_device_instance *sdi;
85b5af06	144
e15f48c2	145	/* Avoid compiler warnings. */
cb93f8a9	146	(void)deviceinfo;
85b5af06	147
5a2326a7	148	sdi = sr_device_instance_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL);
c03ed397 UH	149	if (!sdi) {
c03ed397 UH	150	sr_err("demo: %s: sr_device_instance_new failed", __func__);
85b5af06	151	return 0;
c03ed397	152	}
e15f48c2	153
85b5af06 UH	154	device_instances = g_slist_append(device_instances, sdi);
	155
	156	return 1;
6239c175 UH	157	}
	158
	159	static int hw_opendev(int device_index)
	160	{
17e1afcb	161	/* Avoid compiler warnings. */
cb93f8a9	162	(void)device_index;
6239c175 UH	163
6239c175 UH	164	/* Nothing needed so far. */
697785d1	165
e46b8fb1	166	return SR_OK;
6239c175 UH	167	}
6239c175 UH	168
697785d1	169	static int hw_closedev(int device_index)
6239c175	170	{
17e1afcb	171	/* Avoid compiler warnings. */
cb93f8a9	172	(void)device_index;
6239c175 UH	173
6239c175 UH	174	/* Nothing needed so far. */
697785d1 UH	175
697785d1 UH	176	return SR_OK;
6239c175 UH	177	}
	178
	179	static void hw_cleanup(void)
	180	{
	181	/* Nothing needed so far. */
	182	}
	183
	184	static void *hw_get_device_info(int device_index, int device_info_id)
	185	{
a00ba012	186	struct sr_device_instance *sdi;
85b5af06 UH	187	void *info = NULL;
85b5af06 UH	188
c03ed397 UH	189	if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
c03ed397 UH	190	sr_err("demo: %s: sdi was NULL", __func__);
85b5af06	191	return NULL;
c03ed397	192	}
85b5af06	193
6239c175	194	switch (device_info_id) {
5a2326a7	195	case SR_DI_INSTANCE:
85b5af06	196	info = sdi;
6239c175	197	break;
5a2326a7	198	case SR_DI_NUM_PROBES:
6239c175 UH	199	info = GINT_TO_POINTER(NUM_PROBES);
6239c175 UH	200	break;
464d12c7 KS	201	case SR_DI_PROBE_NAMES:
	202	info = probe_names;
	203	break;
4bfbf9fc BV	204	case SR_DI_SAMPLERATES:
	205	info = &samplerates;
	206	break;
5a2326a7	207	case SR_DI_CUR_SAMPLERATE:
6239c175 UH	208	info = &cur_samplerate;
6239c175 UH	209	break;
5a2326a7	210	case SR_DI_PATTERNMODES:
c8f4624d	211	info = &pattern_strings;
e15f48c2	212	break;
6239c175 UH	213	}
	214
	215	return info;
	216	}
	217
	218	static int hw_get_status(int device_index)
	219	{
17e1afcb	220	/* Avoid compiler warnings. */
cb93f8a9	221	(void)device_index;
5096c6a6	222
5a2326a7	223	return SR_ST_ACTIVE;
6239c175 UH	224	}
	225
	226	static int *hw_get_capabilities(void)
	227	{
	228	return capabilities;
	229	}
	230
	231	static int hw_set_configuration(int device_index, int capability, void *value)
	232	{
	233	int ret;
e15f48c2	234	char *stropt;
6239c175	235
17e1afcb	236	/* Avoid compiler warnings. */
cb93f8a9	237	(void)device_index;
6239c175	238
5a2326a7	239	if (capability == SR_HWCAP_PROBECONFIG) {
d81d2933 BV	240	/* Nothing to do, but must be supported */
	241	ret = SR_OK;
	242	} else if (capability == SR_HWCAP_SAMPLERATE) {
68c12597	243	cur_samplerate = (uint64_t )value;
9c939c51	244	period_ps = 1000000000000 / cur_samplerate;
6f422264 UH	245	sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__,
6f422264 UH	246	cur_samplerate);
e46b8fb1	247	ret = SR_OK;
5a2326a7	248	} else if (capability == SR_HWCAP_LIMIT_SAMPLES) {
68c12597	249	limit_samples = (uint64_t )value;
6f422264 UH	250	sr_dbg("demo: %s: setting limit_samples to %" PRIu64, __func__,
6f422264 UH	251	limit_samples);
e46b8fb1	252	ret = SR_OK;
5a2326a7	253	} else if (capability == SR_HWCAP_LIMIT_MSEC) {
68c12597	254	limit_msec = (uint64_t )value;
6f422264 UH	255	sr_dbg("demo: %s: setting limit_msec to %" PRIu64, __func__,
6f422264 UH	256	limit_msec);
e46b8fb1	257	ret = SR_OK;
5a2326a7	258	} else if (capability == SR_HWCAP_PATTERN_MODE) {
e15f48c2	259	stropt = value;
c03ed397 UH	260	ret = SR_OK;
	261	if (!strcmp(stropt, "sigrok")) {
	262	default_pattern = PATTERN_SIGROK;
	263	} else if (!strcmp(stropt, "random")) {
c8f4624d	264	default_pattern = PATTERN_RANDOM;
e15f48c2	265	} else if (!strcmp(stropt, "incremental")) {
c8f4624d	266	default_pattern = PATTERN_INC;
c03ed397 UH	267	} else if (!strcmp(stropt, "all-low")) {
	268	default_pattern = PATTERN_ALL_LOW;
	269	} else if (!strcmp(stropt, "all-high")) {
	270	default_pattern = PATTERN_ALL_HIGH;
e15f48c2	271	} else {
e46b8fb1	272	ret = SR_ERR;
e15f48c2	273	}
c8f4624d UH	274	sr_dbg("demo: %s: setting pattern to %d", __func__,
c8f4624d UH	275	default_pattern);
6239c175	276	} else {
e46b8fb1	277	ret = SR_ERR;
6239c175 UH	278	}
	279
	280	return ret;
	281	}
	282
5096c6a6	283	static void samples_generator(uint8_t buf, uint64_t size, void data)
85b5af06	284	{
cddd1c5f	285	static uint64_t p = 0;
85b5af06	286	struct databag *mydata = data;
cddd1c5f	287	uint64_t i;
85b5af06	288
c03ed397	289	/* TODO: Needed? */
5096c6a6	290	memset(buf, 0, size);
85b5af06 UH	291
85b5af06 UH	292	switch (mydata->sample_generator) {
c03ed397	293	case PATTERN_SIGROK: /* sigrok pattern */
917e0e71	294	for (i = 0; i < size; i++) {
c8f4624d	295	*(buf + i) = ~(pattern_sigrok[p] >> 1);
917e0e71 BV	296	if (++p == 64)
	297	p = 0;
	298	}
	299	break;
c8f4624d	300	case PATTERN_RANDOM: /* Random */
5096c6a6 UH	301	for (i = 0; i < size; i++)
5096c6a6 UH	302	*(buf + i) = (uint8_t)(rand() & 0xff);
85b5af06	303	break;
c8f4624d	304	case PATTERN_INC: /* Simple increment */
5096c6a6	305	for (i = 0; i < size; i++)
85b5af06 UH	306	*(buf + i) = i;
85b5af06 UH	307	break;
c03ed397	308	case PATTERN_ALL_LOW: /* All probes are low */
5a9660dd	309	memset(buf, 0x00, size);
c03ed397 UH	310	break;
c03ed397 UH	311	case PATTERN_ALL_HIGH: /* All probes are high */
5a9660dd	312	memset(buf, 0xff, size);
c03ed397 UH	313	break;
	314	default:
	315	/* TODO: Error handling. */
	316	break;
85b5af06 UH	317	}
	318	}
	319
	320	/* Thread function */
	321	static void thread_func(void *data)
	322	{
	323	struct databag *mydata = data;
	324	uint8_t buf[BUFSIZE];
	325	uint64_t nb_to_send = 0;
d35aaf02	326	int bytes_written;
1924f59f HE	327	double time_cur, time_last, time_diff;
	328
	329	time_last = g_timer_elapsed(mydata->timer, NULL);
85b5af06 UH	330
85b5af06 UH	331	while (thread_running) {
1924f59f HE	332	/* Rate control */
	333	time_cur = g_timer_elapsed(mydata->timer, NULL);
	334
	335	time_diff = time_cur - time_last;
	336	time_last = time_cur;
	337
	338	nb_to_send = cur_samplerate * time_diff;
	339
c03ed397	340	if (limit_samples) {
1924f59f	341	nb_to_send = MIN(nb_to_send,
c03ed397 UH	342	limit_samples - mydata->samples_counter);
c03ed397 UH	343	}
1924f59f HE	344
	345	/* Make sure we don't overflow. */
	346	nb_to_send = MIN(nb_to_send, BUFSIZE);
	347
	348	if (nb_to_send) {
	349	samples_generator(buf, nb_to_send, data);
	350	mydata->samples_counter += nb_to_send;
070befcd BV	351
070befcd BV	352	g_io_channel_write_chars(channels[1], (gchar *)&buf,
c03ed397	353	nb_to_send, (gsize *)&bytes_written, NULL);
b9cc3629 BV	354	}
b9cc3629 BV	355
1924f59f HE	356	/* Check if we're done. */
	357	if ((limit_msec && time_cur * 1000 > limit_msec) \|\|
	358	(limit_samples && mydata->samples_counter >= limit_samples))
	359	{
85b5af06 UH	360	close(mydata->pipe_fds[1]);
85b5af06 UH	361	thread_running = 0;
85b5af06 UH	362	}
85b5af06 UH	363
1924f59f	364	g_usleep(10);
85b5af06 UH	365	}
	366	}
	367
	368	/* Callback handling data */
9c939c51	369	static int receive_data(int fd, int revents, void *session_data)
85b5af06	370	{
b9c735a2	371	struct sr_datafeed_packet packet;
9c939c51 BV	372	struct sr_datafeed_logic logic;
	373	static uint64_t samples_received = 0;
	374	unsigned char c[BUFSIZE];
108a5bfb	375	gsize z;
1924f59f	376
26ce0bbf	377	/* Avoid compiler warnings. */
cb93f8a9 UH	378	(void)fd;
cb93f8a9 UH	379	(void)revents;
1924f59f HE	380
	381	do {
	382	g_io_channel_read_chars(channels[0],
070befcd	383	(gchar *)&c, BUFSIZE, &z, NULL);
1924f59f HE	384
1924f59f HE	385	if (z > 0) {
5a2326a7	386	packet.type = SR_DF_LOGIC;
9c939c51 BV	387	packet.payload = &logic;
	388	packet.timeoffset = samples_received * period_ps;
	389	packet.duration = z * period_ps;
	390	logic.length = z;
	391	logic.unitsize = 1;
	392	logic.data = c;
	393	sr_session_bus(session_data, &packet);
	394	samples_received += z;
1924f59f HE	395	}
1924f59f HE	396	} while (z > 0);
85b5af06	397
c03ed397 UH	398	if (!thread_running && z <= 0) {
c03ed397 UH	399	/* Make sure we don't receive more packets. */
1924f59f	400	g_io_channel_close(channels[0]);
d35aaf02	401
1924f59f	402	/* Send last packet. */
5a2326a7	403	packet.type = SR_DF_END;
9c939c51	404	sr_session_bus(session_data, &packet);
1924f59f HE	405
1924f59f HE	406	return FALSE;
85b5af06	407	}
1924f59f	408
85b5af06 UH	409	return TRUE;
	410	}
	411
9c939c51	412	static int hw_start_acquisition(int device_index, gpointer session_data)
6239c175	413	{
b9c735a2 UH	414	struct sr_datafeed_packet *packet;
b9c735a2 UH	415	struct sr_datafeed_header *header;
85b5af06	416	struct databag *mydata;
6239c175	417
27a3a6fe UH	418	/* TODO: 'mydata' is never g_free()'d? */
	419	if (!(mydata = g_try_malloc(sizeof(struct databag)))) {
	420	sr_err("demo: %s: mydata malloc failed", __func__);
e46b8fb1	421	return SR_ERR_MALLOC;
27a3a6fe	422	}
85b5af06	423
c8f4624d	424	mydata->sample_generator = default_pattern;
9c939c51	425	mydata->session_data = session_data;
85b5af06 UH	426	mydata->device_index = device_index;
85b5af06 UH	427	mydata->samples_counter = 0;
85b5af06	428
c03ed397 UH	429	if (pipe(mydata->pipe_fds)) {
	430	/* TODO: Better error message. */
	431	sr_err("demo: %s: pipe() failed", __func__);
e46b8fb1	432	return SR_ERR;
c03ed397	433	}
85b5af06	434
d35aaf02 UH	435	channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]);
	436	channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]);
	437
	438	/* Set channel encoding to binary (default is UTF-8). */
	439	g_io_channel_set_encoding(channels[0], NULL, NULL);
	440	g_io_channel_set_encoding(channels[1], NULL, NULL);
	441
	442	/* Make channels to unbuffered. */
	443	g_io_channel_set_buffered(channels[0], FALSE);
	444	g_io_channel_set_buffered(channels[1], FALSE);
	445
6f1be0a2	446	sr_source_add(mydata->pipe_fds[0], G_IO_IN \| G_IO_ERR, 40,
9c939c51	447	receive_data, session_data);
85b5af06 UH	448
	449	/* Run the demo thread. */
	450	g_thread_init(NULL);
c03ed397	451	/* This must to be done between g_thread_init() & g_thread_create(). */
1924f59f	452	mydata->timer = g_timer_new();
85b5af06 UH	453	thread_running = 1;
	454	my_thread =
	455	g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL);
c03ed397 UH	456	if (!my_thread) {
	457	sr_err("demo: %s: g_thread_create failed", __func__);
	458	return SR_ERR; /* TODO */
	459	}
6239c175	460
27a3a6fe UH	461	if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
27a3a6fe UH	462	sr_err("demo: %s: packet malloc failed", __func__);
e46b8fb1	463	return SR_ERR_MALLOC;
27a3a6fe UH	464	}
	465
	466	if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
	467	sr_err("demo: %s: header malloc failed", __func__);
	468	return SR_ERR_MALLOC;
	469	}
6239c175	470
5a2326a7	471	packet->type = SR_DF_HEADER;
9c939c51 BV	472	packet->payload = header;
	473	packet->timeoffset = 0;
	474	packet->duration = 0;
6239c175 UH	475	header->feed_version = 1;
	476	gettimeofday(&header->starttime, NULL);
	477	header->samplerate = cur_samplerate;
c2616fb9 DR	478	header->num_logic_probes = NUM_PROBES;
c2616fb9 DR	479	header->num_analog_probes = 0;
9c939c51	480	sr_session_bus(session_data, packet);
27a3a6fe UH	481	g_free(header);
27a3a6fe UH	482	g_free(packet);
6239c175	483
e46b8fb1	484	return SR_OK;
6239c175 UH	485	}
6239c175 UH	486
9c939c51	487	static void hw_stop_acquisition(int device_index, gpointer session_data)
6239c175	488	{
17e1afcb	489	/* Avoid compiler warnings. */
cb93f8a9 UH	490	(void)device_index;
cb93f8a9 UH	491	(void)session_data;
6239c175	492
1924f59f HE	493	/* Stop generate thread. */
1924f59f HE	494	thread_running = 0;
6239c175 UH	495	}
6239c175 UH	496
5c2d46d1	497	struct sr_device_plugin demo_plugin_info = {
e519ba86 UH	498	.name = "demo",
	499	.longname = "Demo driver and pattern generator",
	500	.api_version = 1,
	501	.init = hw_init,
	502	.cleanup = hw_cleanup,
86f5e3d8 UH	503	.opendev = hw_opendev,
86f5e3d8 UH	504	.closedev = hw_closedev,
e519ba86 UH	505	.get_device_info = hw_get_device_info,
	506	.get_status = hw_get_status,
	507	.get_capabilities = hw_get_capabilities,
	508	.set_configuration = hw_set_configuration,
	509	.start_acquisition = hw_start_acquisition,
	510	.stop_acquisition = hw_stop_acquisition,
6239c175	511	};