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