[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 dev_index;
	gpointer session_data;
	GTimer *timer;
};

static int hwcaps[] = {
	SR_HWCAP_LOGIC_ANALYZER,
	SR_HWCAP_DEMO_DEV,
	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,
};

/* Private, per-device-instance driver context. */
/* TODO: struct context as with the other drivers. */

/* List of struct sr_dev_inst, maintained by dev_open()/dev_close(). */
static GSList *dev_insts = 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_dev_acquisition_stop(int dev_index, gpointer session_data);

static int hw_init(const char *devinfo)
{
	struct sr_dev_inst *sdi;

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

	sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL);
	if (!sdi) {
		sr_err("demo: %s: sr_dev_inst_new failed", __func__);
		return 0;
	}

	dev_insts = g_slist_append(dev_insts, sdi);

	return 1;
}

static int hw_dev_open(int dev_index)
{
	/* Avoid compiler warnings. */
	(void)dev_index;

	/* Nothing needed so far. */

	return SR_OK;
}

static int hw_dev_close(int dev_index)
{
	/* Avoid compiler warnings. */
	(void)dev_index;

	/* Nothing needed so far. */

	return SR_OK;
}

static int hw_cleanup(void)
{
	/* Nothing needed so far. */
	return SR_OK;
}

static void *hw_dev_info_get(int dev_index, int dev_info_id)
{
	struct sr_dev_inst *sdi;
	void *info = NULL;

	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
		sr_err("demo: %s: sdi was NULL", __func__);
		return NULL;
	}

	switch (dev_info_id) {
	case SR_DI_INST:
		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_dev_status_get(int dev_index)
{
	/* Avoid compiler warnings. */
	(void)dev_index;

	return SR_ST_ACTIVE;
}

static int *hw_hwcap_get_all(void)
{
	return hwcaps;
}

static int hw_dev_config_set(int dev_index, int hwcap, void *value)
{
	int ret;
	char *stropt;

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

	if (hwcap == SR_HWCAP_PROBECONFIG) {
		/* Nothing to do, but must be supported */
		ret = SR_OK;
	} else if (hwcap == SR_HWCAP_SAMPLERATE) {
		cur_samplerate = *(uint64_t *)value;
		sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__,
		       cur_samplerate);
		ret = SR_OK;
	} else if (hwcap == 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 (hwcap == 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 (hwcap == 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_dev_acquisition_start(int dev_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->dev_index = dev_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_dev_acquisition_stop(int dev_index, gpointer session_data)
{
	/* Avoid compiler warnings. */
	(void)dev_index;
	(void)session_data;

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

	return SR_OK;
}

SR_PRIV struct sr_dev_plugin demo_plugin_info = {
	.name = "demo",
	.longname = "Demo driver and pattern generator",
	.api_version = 1,
	.init = hw_init,
	.cleanup = hw_cleanup,
	.dev_open = hw_dev_open,
	.dev_close = hw_dev_close,
	.dev_info_get = hw_dev_info_get,
	.dev_status_get = hw_dev_status_get,
	.hwcap_get_all = hw_hwcap_get_all,
	.dev_config_set = hw_dev_config_set,
	.dev_acquisition_start = hw_dev_acquisition_start,
	.dev_acquisition_stop = hw_dev_acquisition_stop,
};
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;
bb7ef793	74	int dev_index;
9c939c51	75	gpointer session_data;
b9cc3629	76	GTimer *timer;
e15f48c2	77	};
85b5af06	78
ffedd0bf	79	static int hwcaps[] = {
5a2326a7	80	SR_HWCAP_LOGIC_ANALYZER,
bb7ef793	81	SR_HWCAP_DEMO_DEV,
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
ea9cfed7 UH	128	/* Private, per-device-instance driver context. */
	129	/* TODO: struct context as with the other drivers. */
	130
e7eb703f	131	/* List of struct sr_dev_inst, maintained by dev_open()/dev_close(). */
d68e2d1a	132	static GSList *dev_insts = NULL;
59df0c77	133	static uint64_t cur_samplerate = SR_KHZ(200);
b9cc3629 BV	134	static uint64_t limit_samples = 0;
b9cc3629 BV	135	static uint64_t limit_msec = 0;
c8f4624d	136	static int default_pattern = PATTERN_SIGROK;
b9cc3629 BV	137	static GThread *my_thread;
b9cc3629 BV	138	static int thread_running;
6239c175	139
69040b7c	140	static int hw_dev_acquisition_stop(int dev_index, gpointer session_data);
6239c175	141
bb7ef793	142	static int hw_init(const char *devinfo)
6239c175	143	{
d68e2d1a	144	struct sr_dev_inst *sdi;
85b5af06	145
e15f48c2	146	/* Avoid compiler warnings. */
bb7ef793	147	(void)devinfo;
85b5af06	148
d3683c42	149	sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL);
c03ed397	150	if (!sdi) {
d68e2d1a	151	sr_err("demo: %s: sr_dev_inst_new failed", __func__);
85b5af06	152	return 0;
c03ed397	153	}
e15f48c2	154
d68e2d1a	155	dev_insts = g_slist_append(dev_insts, sdi);
85b5af06 UH	156
85b5af06 UH	157	return 1;
6239c175 UH	158	}
6239c175 UH	159
e7eb703f	160	static int hw_dev_open(int dev_index)
6239c175	161	{
17e1afcb	162	/* Avoid compiler warnings. */
bb7ef793	163	(void)dev_index;
6239c175 UH	164
6239c175 UH	165	/* Nothing needed so far. */
697785d1	166
e46b8fb1	167	return SR_OK;
6239c175 UH	168	}
6239c175 UH	169
e7eb703f	170	static int hw_dev_close(int dev_index)
6239c175	171	{
17e1afcb	172	/* Avoid compiler warnings. */
bb7ef793	173	(void)dev_index;
6239c175 UH	174
6239c175 UH	175	/* Nothing needed so far. */
697785d1 UH	176
697785d1 UH	177	return SR_OK;
6239c175 UH	178	}
6239c175 UH	179
57ab7d9f	180	static int hw_cleanup(void)
6239c175 UH	181	{
6239c175 UH	182	/* Nothing needed so far. */
57ab7d9f	183	return SR_OK;
6239c175 UH	184	}
6239c175 UH	185
5097b0d0	186	static void *hw_dev_info_get(int dev_index, int dev_info_id)
6239c175	187	{
d68e2d1a	188	struct sr_dev_inst *sdi;
85b5af06 UH	189	void *info = NULL;
85b5af06 UH	190
bb7ef793	191	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
c03ed397	192	sr_err("demo: %s: sdi was NULL", __func__);
85b5af06	193	return NULL;
c03ed397	194	}
85b5af06	195
bb7ef793	196	switch (dev_info_id) {
1d9a8a5f	197	case SR_DI_INST:
85b5af06	198	info = sdi;
6239c175	199	break;
5a2326a7	200	case SR_DI_NUM_PROBES:
6239c175 UH	201	info = GINT_TO_POINTER(NUM_PROBES);
6239c175 UH	202	break;
464d12c7 KS	203	case SR_DI_PROBE_NAMES:
	204	info = probe_names;
	205	break;
4bfbf9fc BV	206	case SR_DI_SAMPLERATES:
	207	info = &samplerates;
	208	break;
5a2326a7	209	case SR_DI_CUR_SAMPLERATE:
6239c175 UH	210	info = &cur_samplerate;
6239c175 UH	211	break;
5a2326a7	212	case SR_DI_PATTERNMODES:
c8f4624d	213	info = &pattern_strings;
e15f48c2	214	break;
6239c175 UH	215	}
	216
	217	return info;
	218	}
	219
e7eb703f	220	static int hw_dev_status_get(int dev_index)
6239c175	221	{
17e1afcb	222	/* Avoid compiler warnings. */
bb7ef793	223	(void)dev_index;
5096c6a6	224
5a2326a7	225	return SR_ST_ACTIVE;
6239c175 UH	226	}
6239c175 UH	227
ffedd0bf	228	static int *hw_hwcap_get_all(void)
6239c175	229	{
ffedd0bf	230	return hwcaps;
6239c175 UH	231	}
6239c175 UH	232
a9a245b4	233	static int hw_dev_config_set(int dev_index, int hwcap, void *value)
6239c175 UH	234	{
6239c175 UH	235	int ret;
e15f48c2	236	char *stropt;
6239c175	237
17e1afcb	238	/* Avoid compiler warnings. */
bb7ef793	239	(void)dev_index;
6239c175	240
ffedd0bf	241	if (hwcap == SR_HWCAP_PROBECONFIG) {
d81d2933 BV	242	/* Nothing to do, but must be supported */
d81d2933 BV	243	ret = SR_OK;
ffedd0bf	244	} else if (hwcap == SR_HWCAP_SAMPLERATE) {
68c12597	245	cur_samplerate = (uint64_t )value;
6f422264 UH	246	sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__,
6f422264 UH	247	cur_samplerate);
e46b8fb1	248	ret = SR_OK;
ffedd0bf	249	} else if (hwcap == SR_HWCAP_LIMIT_SAMPLES) {
68c12597	250	limit_samples = (uint64_t )value;
6f422264 UH	251	sr_dbg("demo: %s: setting limit_samples to %" PRIu64, __func__,
6f422264 UH	252	limit_samples);
e46b8fb1	253	ret = SR_OK;
ffedd0bf	254	} else if (hwcap == SR_HWCAP_LIMIT_MSEC) {
68c12597	255	limit_msec = (uint64_t )value;
6f422264 UH	256	sr_dbg("demo: %s: setting limit_msec to %" PRIu64, __func__,
6f422264 UH	257	limit_msec);
e46b8fb1	258	ret = SR_OK;
ffedd0bf	259	} else if (hwcap == SR_HWCAP_PATTERN_MODE) {
e15f48c2	260	stropt = value;
c03ed397 UH	261	ret = SR_OK;
	262	if (!strcmp(stropt, "sigrok")) {
	263	default_pattern = PATTERN_SIGROK;
	264	} else if (!strcmp(stropt, "random")) {
c8f4624d	265	default_pattern = PATTERN_RANDOM;
e15f48c2	266	} else if (!strcmp(stropt, "incremental")) {
c8f4624d	267	default_pattern = PATTERN_INC;
c03ed397 UH	268	} else if (!strcmp(stropt, "all-low")) {
	269	default_pattern = PATTERN_ALL_LOW;
	270	} else if (!strcmp(stropt, "all-high")) {
	271	default_pattern = PATTERN_ALL_HIGH;
e15f48c2	272	} else {
e46b8fb1	273	ret = SR_ERR;
e15f48c2	274	}
c8f4624d UH	275	sr_dbg("demo: %s: setting pattern to %d", __func__,
c8f4624d UH	276	default_pattern);
6239c175	277	} else {
e46b8fb1	278	ret = SR_ERR;
6239c175 UH	279	}
	280
	281	return ret;
	282	}
	283
5096c6a6	284	static void samples_generator(uint8_t buf, uint64_t size, void data)
85b5af06	285	{
cddd1c5f	286	static uint64_t p = 0;
85b5af06	287	struct databag *mydata = data;
cddd1c5f	288	uint64_t i;
85b5af06	289
c03ed397	290	/* TODO: Needed? */
5096c6a6	291	memset(buf, 0, size);
85b5af06 UH	292
85b5af06 UH	293	switch (mydata->sample_generator) {
c03ed397	294	case PATTERN_SIGROK: /* sigrok pattern */
917e0e71	295	for (i = 0; i < size; i++) {
c8f4624d	296	*(buf + i) = ~(pattern_sigrok[p] >> 1);
917e0e71 BV	297	if (++p == 64)
	298	p = 0;
	299	}
	300	break;
c8f4624d	301	case PATTERN_RANDOM: /* Random */
5096c6a6 UH	302	for (i = 0; i < size; i++)
5096c6a6 UH	303	*(buf + i) = (uint8_t)(rand() & 0xff);
85b5af06	304	break;
c8f4624d	305	case PATTERN_INC: /* Simple increment */
5096c6a6	306	for (i = 0; i < size; i++)
85b5af06 UH	307	*(buf + i) = i;
85b5af06 UH	308	break;
c03ed397	309	case PATTERN_ALL_LOW: /* All probes are low */
5a9660dd	310	memset(buf, 0x00, size);
c03ed397 UH	311	break;
c03ed397 UH	312	case PATTERN_ALL_HIGH: /* All probes are high */
5a9660dd	313	memset(buf, 0xff, size);
c03ed397 UH	314	break;
	315	default:
	316	/* TODO: Error handling. */
	317	break;
85b5af06 UH	318	}
	319	}
	320
	321	/* Thread function */
	322	static void thread_func(void *data)
	323	{
	324	struct databag *mydata = data;
	325	uint8_t buf[BUFSIZE];
	326	uint64_t nb_to_send = 0;
d35aaf02	327	int bytes_written;
1924f59f HE	328	double time_cur, time_last, time_diff;
	329
	330	time_last = g_timer_elapsed(mydata->timer, NULL);
85b5af06 UH	331
85b5af06 UH	332	while (thread_running) {
1924f59f HE	333	/* Rate control */
	334	time_cur = g_timer_elapsed(mydata->timer, NULL);
	335
	336	time_diff = time_cur - time_last;
	337	time_last = time_cur;
	338
	339	nb_to_send = cur_samplerate * time_diff;
	340
c03ed397	341	if (limit_samples) {
1924f59f	342	nb_to_send = MIN(nb_to_send,
c03ed397 UH	343	limit_samples - mydata->samples_counter);
c03ed397 UH	344	}
1924f59f HE	345
	346	/* Make sure we don't overflow. */
	347	nb_to_send = MIN(nb_to_send, BUFSIZE);
	348
	349	if (nb_to_send) {
	350	samples_generator(buf, nb_to_send, data);
	351	mydata->samples_counter += nb_to_send;
070befcd BV	352
070befcd BV	353	g_io_channel_write_chars(channels[1], (gchar *)&buf,
c03ed397	354	nb_to_send, (gsize *)&bytes_written, NULL);
b9cc3629 BV	355	}
b9cc3629 BV	356
1924f59f HE	357	/* Check if we're done. */
	358	if ((limit_msec && time_cur * 1000 > limit_msec) \|\|
	359	(limit_samples && mydata->samples_counter >= limit_samples))
	360	{
85b5af06 UH	361	close(mydata->pipe_fds[1]);
85b5af06 UH	362	thread_running = 0;
85b5af06 UH	363	}
85b5af06 UH	364
1924f59f	365	g_usleep(10);
85b5af06 UH	366	}
	367	}
	368
	369	/* Callback handling data */
9c939c51	370	static int receive_data(int fd, int revents, void *session_data)
85b5af06	371	{
b9c735a2	372	struct sr_datafeed_packet packet;
9c939c51 BV	373	struct sr_datafeed_logic logic;
	374	static uint64_t samples_received = 0;
	375	unsigned char c[BUFSIZE];
108a5bfb	376	gsize z;
1924f59f	377
26ce0bbf	378	/* Avoid compiler warnings. */
cb93f8a9 UH	379	(void)fd;
cb93f8a9 UH	380	(void)revents;
1924f59f HE	381
	382	do {
	383	g_io_channel_read_chars(channels[0],
070befcd	384	(gchar *)&c, BUFSIZE, &z, NULL);
1924f59f HE	385
1924f59f HE	386	if (z > 0) {
5a2326a7	387	packet.type = SR_DF_LOGIC;
9c939c51	388	packet.payload = &logic;
9c939c51 BV	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
69040b7c	411	static int hw_dev_acquisition_start(int dev_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;
bb7ef793	425	mydata->dev_index = dev_index;
85b5af06	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	471	packet->payload = header;
6239c175 UH	472	header->feed_version = 1;
	473	gettimeofday(&header->starttime, NULL);
	474	header->samplerate = cur_samplerate;
c2616fb9	475	header->num_logic_probes = NUM_PROBES;
9c939c51	476	sr_session_bus(session_data, packet);
27a3a6fe UH	477	g_free(header);
27a3a6fe UH	478	g_free(packet);
6239c175	479
e46b8fb1	480	return SR_OK;
6239c175 UH	481	}
6239c175 UH	482
69040b7c	483	static int hw_dev_acquisition_stop(int dev_index, gpointer session_data)
6239c175	484	{
17e1afcb	485	/* Avoid compiler warnings. */
bb7ef793	486	(void)dev_index;
cb93f8a9	487	(void)session_data;
6239c175	488
1924f59f HE	489	/* Stop generate thread. */
1924f59f HE	490	thread_running = 0;
3010f21c UH	491
3010f21c UH	492	return SR_OK;
6239c175 UH	493	}
6239c175 UH	494
bb7ef793	495	SR_PRIV struct sr_dev_plugin demo_plugin_info = {
e519ba86 UH	496	.name = "demo",
	497	.longname = "Demo driver and pattern generator",
	498	.api_version = 1,
	499	.init = hw_init,
	500	.cleanup = hw_cleanup,
e7eb703f UH	501	.dev_open = hw_dev_open,
e7eb703f UH	502	.dev_close = hw_dev_close,
5097b0d0	503	.dev_info_get = hw_dev_info_get,
e7eb703f	504	.dev_status_get = hw_dev_status_get,
ffedd0bf	505	.hwcap_get_all = hw_hwcap_get_all,
a9a245b4	506	.dev_config_set = hw_dev_config_set,
69040b7c UH	507	.dev_acquisition_start = hw_dev_acquisition_start,
69040b7c UH	508	.dev_acquisition_stop = hw_dev_acquisition_stop,
6239c175	509	};