[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 context {
	int pipe_fds[2];
	uint8_t sample_generator;
	uint8_t thread_running;
	uint64_t samples_counter;
	int dev_index;
	void *session_dev_id;
	GTimer *timer;
};

static const 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,
};

/* We name the probes 0-7 on our demo driver. */
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, void *cb_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_PATTERNS:
		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 const 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 context *ctx = data;
	uint64_t i;

	/* TODO: Needed? */
	memset(buf, 0, size);

	switch (ctx->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:
		sr_err("demo: %s: unknown pattern %d", __func__,
		       ctx->sample_generator);
		break;
	}
}

/* Thread function */
static void thread_func(void *data)
{
	struct context *ctx = 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(ctx->timer, NULL);

	while (thread_running) {
		/* Rate control */
		time_cur = g_timer_elapsed(ctx->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 - ctx->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);
			ctx->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 && ctx->samples_counter >= limit_samples))
		{
			close(ctx->pipe_fds[1]);
			thread_running = 0;
		}

		g_usleep(10);
	}
}

/* Callback handling data */
static int receive_data(int fd, int revents, void *cb_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_send(cb_data, &packet);
			samples_received += z;
		}
	} while (z > 0);

	if (!thread_running && z <= 0) {
		/* Make sure we don't receive more packets. */
		g_io_channel_shutdown(channels[0], FALSE, NULL);

		/* Send last packet. */
		packet.type = SR_DF_END;
		sr_session_send(cb_data, &packet);

		return FALSE;
	}

	return TRUE;
}

static int hw_dev_acquisition_start(int dev_index, void *cb_data)
{
	struct sr_datafeed_packet *packet;
	struct sr_datafeed_header *header;
	struct sr_datafeed_meta_logic meta;
	struct context *ctx;

	/* TODO: 'ctx' is never g_free()'d? */
	if (!(ctx = g_try_malloc(sizeof(struct context)))) {
		sr_err("demo: %s: ctx malloc failed", __func__);
		return SR_ERR_MALLOC;
	}

	ctx->sample_generator = default_pattern;
	ctx->session_dev_id = cb_data;
	ctx->dev_index = dev_index;
	ctx->samples_counter = 0;

	if (pipe(ctx->pipe_fds)) {
		/* TODO: Better error message. */
		sr_err("demo: %s: pipe() failed", __func__);
		return SR_ERR;
	}

	channels[0] = g_io_channel_unix_new(ctx->pipe_fds[0]);
	channels[1] = g_io_channel_unix_new(ctx->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(ctx->pipe_fds[0], G_IO_IN | G_IO_ERR, 40,
		      receive_data, ctx->session_dev_id);

	/* Run the demo thread. */
	g_thread_init(NULL);
	/* This must to be done between g_thread_init() & g_thread_create(). */
	ctx->timer = g_timer_new();
	thread_running = 1;
	my_thread =
	    g_thread_create((GThreadFunc)thread_func, ctx, 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);
	sr_session_send(ctx->session_dev_id, packet);

	/* Send metadata about the SR_DF_LOGIC packets to come. */
	packet->type = SR_DF_META_LOGIC;
	packet->payload = &meta;
	meta.samplerate = cur_samplerate;
	meta.num_probes = NUM_PROBES;
	sr_session_send(ctx->session_dev_id, packet);

	g_free(header);
	g_free(packet);

	return SR_OK;
}

/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
static int hw_dev_acquisition_stop(int dev_index, void *cb_data)
{
	/* Avoid compiler warnings. */
	(void)dev_index;
	(void)cb_data;

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

	return SR_OK;
}

SR_PRIV struct sr_dev_driver demo_driver_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
455b26ed	69	struct context {
e15f48c2 BV	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;
3cd3a20b	75	void *session_dev_id;
b9cc3629	76	GTimer *timer;
e15f48c2	77	};
85b5af06	78
915f7cc8	79	static const 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
d261dbbf	105	/* We name the probes 0-7 on our demo driver. */
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
ea9cfed7 UH	129	/* Private, per-device-instance driver context. */
	130	/* TODO: struct context as with the other drivers. */
	131
e7eb703f	132	/* List of struct sr_dev_inst, maintained by dev_open()/dev_close(). */
d68e2d1a	133	static GSList *dev_insts = NULL;
59df0c77	134	static uint64_t cur_samplerate = SR_KHZ(200);
b9cc3629 BV	135	static uint64_t limit_samples = 0;
b9cc3629 BV	136	static uint64_t limit_msec = 0;
c8f4624d	137	static int default_pattern = PATTERN_SIGROK;
b9cc3629 BV	138	static GThread *my_thread;
b9cc3629 BV	139	static int thread_running;
6239c175	140
3cd3a20b	141	static int hw_dev_acquisition_stop(int dev_index, void *cb_data);
6239c175	142
bb7ef793	143	static int hw_init(const char *devinfo)
6239c175	144	{
d68e2d1a	145	struct sr_dev_inst *sdi;
85b5af06	146
e15f48c2	147	/* Avoid compiler warnings. */
bb7ef793	148	(void)devinfo;
85b5af06	149
d3683c42	150	sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL);
c03ed397	151	if (!sdi) {
d68e2d1a	152	sr_err("demo: %s: sr_dev_inst_new failed", __func__);
85b5af06	153	return 0;
c03ed397	154	}
e15f48c2	155
d68e2d1a	156	dev_insts = g_slist_append(dev_insts, sdi);
85b5af06 UH	157
85b5af06 UH	158	return 1;
6239c175 UH	159	}
6239c175 UH	160
e7eb703f	161	static int hw_dev_open(int dev_index)
6239c175	162	{
17e1afcb	163	/* Avoid compiler warnings. */
bb7ef793	164	(void)dev_index;
6239c175 UH	165
6239c175 UH	166	/* Nothing needed so far. */
697785d1	167
e46b8fb1	168	return SR_OK;
6239c175 UH	169	}
6239c175 UH	170
e7eb703f	171	static int hw_dev_close(int dev_index)
6239c175	172	{
17e1afcb	173	/* Avoid compiler warnings. */
bb7ef793	174	(void)dev_index;
6239c175 UH	175
6239c175 UH	176	/* Nothing needed so far. */
697785d1 UH	177
697785d1 UH	178	return SR_OK;
6239c175 UH	179	}
6239c175 UH	180
57ab7d9f	181	static int hw_cleanup(void)
6239c175 UH	182	{
6239c175 UH	183	/* Nothing needed so far. */
57ab7d9f	184	return SR_OK;
6239c175 UH	185	}
6239c175 UH	186
5097b0d0	187	static void *hw_dev_info_get(int dev_index, int dev_info_id)
6239c175	188	{
d68e2d1a	189	struct sr_dev_inst *sdi;
85b5af06 UH	190	void *info = NULL;
85b5af06 UH	191
bb7ef793	192	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
c03ed397	193	sr_err("demo: %s: sdi was NULL", __func__);
85b5af06	194	return NULL;
c03ed397	195	}
85b5af06	196
bb7ef793	197	switch (dev_info_id) {
1d9a8a5f	198	case SR_DI_INST:
85b5af06	199	info = sdi;
6239c175	200	break;
5a2326a7	201	case SR_DI_NUM_PROBES:
6239c175 UH	202	info = GINT_TO_POINTER(NUM_PROBES);
6239c175 UH	203	break;
464d12c7 KS	204	case SR_DI_PROBE_NAMES:
	205	info = probe_names;
	206	break;
4bfbf9fc BV	207	case SR_DI_SAMPLERATES:
	208	info = &samplerates;
	209	break;
5a2326a7	210	case SR_DI_CUR_SAMPLERATE:
6239c175 UH	211	info = &cur_samplerate;
6239c175 UH	212	break;
eb0a3731	213	case SR_DI_PATTERNS:
c8f4624d	214	info = &pattern_strings;
e15f48c2	215	break;
6239c175 UH	216	}
	217
	218	return info;
	219	}
	220
e7eb703f	221	static int hw_dev_status_get(int dev_index)
6239c175	222	{
17e1afcb	223	/* Avoid compiler warnings. */
bb7ef793	224	(void)dev_index;
5096c6a6	225
5a2326a7	226	return SR_ST_ACTIVE;
6239c175 UH	227	}
6239c175 UH	228
915f7cc8	229	static const int *hw_hwcap_get_all(void)
6239c175	230	{
ffedd0bf	231	return hwcaps;
6239c175 UH	232	}
6239c175 UH	233
a9a245b4	234	static int hw_dev_config_set(int dev_index, int hwcap, void *value)
6239c175 UH	235	{
6239c175 UH	236	int ret;
e15f48c2	237	char *stropt;
6239c175	238
17e1afcb	239	/* Avoid compiler warnings. */
bb7ef793	240	(void)dev_index;
6239c175	241
ffedd0bf	242	if (hwcap == SR_HWCAP_PROBECONFIG) {
d81d2933 BV	243	/* Nothing to do, but must be supported */
d81d2933 BV	244	ret = SR_OK;
ffedd0bf	245	} else if (hwcap == SR_HWCAP_SAMPLERATE) {
68c12597	246	cur_samplerate = (uint64_t )value;
6f422264 UH	247	sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__,
6f422264 UH	248	cur_samplerate);
e46b8fb1	249	ret = SR_OK;
ffedd0bf	250	} else if (hwcap == SR_HWCAP_LIMIT_SAMPLES) {
68c12597	251	limit_samples = (uint64_t )value;
6f422264 UH	252	sr_dbg("demo: %s: setting limit_samples to %" PRIu64, __func__,
6f422264 UH	253	limit_samples);
e46b8fb1	254	ret = SR_OK;
ffedd0bf	255	} else if (hwcap == SR_HWCAP_LIMIT_MSEC) {
68c12597	256	limit_msec = (uint64_t )value;
6f422264 UH	257	sr_dbg("demo: %s: setting limit_msec to %" PRIu64, __func__,
6f422264 UH	258	limit_msec);
e46b8fb1	259	ret = SR_OK;
ffedd0bf	260	} else if (hwcap == SR_HWCAP_PATTERN_MODE) {
e15f48c2	261	stropt = value;
c03ed397 UH	262	ret = SR_OK;
	263	if (!strcmp(stropt, "sigrok")) {
	264	default_pattern = PATTERN_SIGROK;
	265	} else if (!strcmp(stropt, "random")) {
c8f4624d	266	default_pattern = PATTERN_RANDOM;
e15f48c2	267	} else if (!strcmp(stropt, "incremental")) {
c8f4624d	268	default_pattern = PATTERN_INC;
c03ed397 UH	269	} else if (!strcmp(stropt, "all-low")) {
	270	default_pattern = PATTERN_ALL_LOW;
	271	} else if (!strcmp(stropt, "all-high")) {
	272	default_pattern = PATTERN_ALL_HIGH;
e15f48c2	273	} else {
e46b8fb1	274	ret = SR_ERR;
e15f48c2	275	}
c8f4624d UH	276	sr_dbg("demo: %s: setting pattern to %d", __func__,
c8f4624d UH	277	default_pattern);
6239c175	278	} else {
e46b8fb1	279	ret = SR_ERR;
6239c175 UH	280	}
	281
	282	return ret;
	283	}
	284
5096c6a6	285	static void samples_generator(uint8_t buf, uint64_t size, void data)
85b5af06	286	{
cddd1c5f	287	static uint64_t p = 0;
455b26ed	288	struct context *ctx = data;
cddd1c5f	289	uint64_t i;
85b5af06	290
c03ed397	291	/* TODO: Needed? */
5096c6a6	292	memset(buf, 0, size);
85b5af06	293
ab331b67	294	switch (ctx->sample_generator) {
c03ed397	295	case PATTERN_SIGROK: /* sigrok pattern */
917e0e71	296	for (i = 0; i < size; i++) {
c8f4624d	297	*(buf + i) = ~(pattern_sigrok[p] >> 1);
917e0e71 BV	298	if (++p == 64)
	299	p = 0;
	300	}
	301	break;
c8f4624d	302	case PATTERN_RANDOM: /* Random */
5096c6a6 UH	303	for (i = 0; i < size; i++)
5096c6a6 UH	304	*(buf + i) = (uint8_t)(rand() & 0xff);
85b5af06	305	break;
c8f4624d	306	case PATTERN_INC: /* Simple increment */
5096c6a6	307	for (i = 0; i < size; i++)
85b5af06 UH	308	*(buf + i) = i;
85b5af06 UH	309	break;
c03ed397	310	case PATTERN_ALL_LOW: /* All probes are low */
5a9660dd	311	memset(buf, 0x00, size);
c03ed397 UH	312	break;
c03ed397 UH	313	case PATTERN_ALL_HIGH: /* All probes are high */
5a9660dd	314	memset(buf, 0xff, size);
c03ed397 UH	315	break;
c03ed397 UH	316	default:
0abee507	317	sr_err("demo: %s: unknown pattern %d", __func__,
ab331b67	318	ctx->sample_generator);
c03ed397	319	break;
85b5af06 UH	320	}
	321	}
	322
	323	/* Thread function */
	324	static void thread_func(void *data)
	325	{
455b26ed	326	struct context *ctx = data;
85b5af06 UH	327	uint8_t buf[BUFSIZE];
85b5af06 UH	328	uint64_t nb_to_send = 0;
d35aaf02	329	int bytes_written;
1924f59f HE	330	double time_cur, time_last, time_diff;
1924f59f HE	331
ab331b67	332	time_last = g_timer_elapsed(ctx->timer, NULL);
85b5af06 UH	333
85b5af06 UH	334	while (thread_running) {
1924f59f	335	/* Rate control */
ab331b67	336	time_cur = g_timer_elapsed(ctx->timer, NULL);
1924f59f HE	337
	338	time_diff = time_cur - time_last;
	339	time_last = time_cur;
	340
	341	nb_to_send = cur_samplerate * time_diff;
	342
c03ed397	343	if (limit_samples) {
1924f59f	344	nb_to_send = MIN(nb_to_send,
ab331b67	345	limit_samples - ctx->samples_counter);
c03ed397	346	}
1924f59f HE	347
	348	/* Make sure we don't overflow. */
	349	nb_to_send = MIN(nb_to_send, BUFSIZE);
	350
	351	if (nb_to_send) {
	352	samples_generator(buf, nb_to_send, data);
ab331b67	353	ctx->samples_counter += nb_to_send;
070befcd BV	354
070befcd BV	355	g_io_channel_write_chars(channels[1], (gchar *)&buf,
c03ed397	356	nb_to_send, (gsize *)&bytes_written, NULL);
b9cc3629 BV	357	}
b9cc3629 BV	358
1924f59f HE	359	/* Check if we're done. */
1924f59f HE	360	if ((limit_msec && time_cur * 1000 > limit_msec) \|\|
ab331b67	361	(limit_samples && ctx->samples_counter >= limit_samples))
1924f59f	362	{
ab331b67	363	close(ctx->pipe_fds[1]);
85b5af06	364	thread_running = 0;
85b5af06 UH	365	}
85b5af06 UH	366
1924f59f	367	g_usleep(10);
85b5af06 UH	368	}
	369	}
	370
	371	/* Callback handling data */
1f9813eb	372	static int receive_data(int fd, int revents, void *cb_data)
85b5af06	373	{
b9c735a2	374	struct sr_datafeed_packet packet;
9c939c51 BV	375	struct sr_datafeed_logic logic;
	376	static uint64_t samples_received = 0;
	377	unsigned char c[BUFSIZE];
108a5bfb	378	gsize z;
1924f59f	379
26ce0bbf	380	/* Avoid compiler warnings. */
cb93f8a9 UH	381	(void)fd;
cb93f8a9 UH	382	(void)revents;
1924f59f HE	383
	384	do {
	385	g_io_channel_read_chars(channels[0],
070befcd	386	(gchar *)&c, BUFSIZE, &z, NULL);
1924f59f HE	387
1924f59f HE	388	if (z > 0) {
5a2326a7	389	packet.type = SR_DF_LOGIC;
9c939c51	390	packet.payload = &logic;
9c939c51 BV	391	logic.length = z;
	392	logic.unitsize = 1;
	393	logic.data = c;
1f9813eb	394	sr_session_send(cb_data, &packet);
9c939c51	395	samples_received += z;
1924f59f HE	396	}
1924f59f HE	397	} while (z > 0);
85b5af06	398
c03ed397 UH	399	if (!thread_running && z <= 0) {
c03ed397 UH	400	/* Make sure we don't receive more packets. */
993526f8	401	g_io_channel_shutdown(channels[0], FALSE, NULL);
d35aaf02	402
1924f59f	403	/* Send last packet. */
5a2326a7	404	packet.type = SR_DF_END;
1f9813eb	405	sr_session_send(cb_data, &packet);
1924f59f HE	406
1924f59f HE	407	return FALSE;
85b5af06	408	}
1924f59f	409
85b5af06 UH	410	return TRUE;
	411	}
	412
3cd3a20b	413	static int hw_dev_acquisition_start(int dev_index, void *cb_data)
6239c175	414	{
b9c735a2 UH	415	struct sr_datafeed_packet *packet;
b9c735a2 UH	416	struct sr_datafeed_header *header;
f366e86c	417	struct sr_datafeed_meta_logic meta;
455b26ed	418	struct context *ctx;
6239c175	419
ab331b67	420	/* TODO: 'ctx' is never g_free()'d? */
455b26ed	421	if (!(ctx = g_try_malloc(sizeof(struct context)))) {
ab331b67	422	sr_err("demo: %s: ctx malloc failed", __func__);
e46b8fb1	423	return SR_ERR_MALLOC;
27a3a6fe	424	}
85b5af06	425
ab331b67 UH	426	ctx->sample_generator = default_pattern;
	427	ctx->session_dev_id = cb_data;
	428	ctx->dev_index = dev_index;
	429	ctx->samples_counter = 0;
85b5af06	430
ab331b67	431	if (pipe(ctx->pipe_fds)) {
c03ed397 UH	432	/* TODO: Better error message. */
c03ed397 UH	433	sr_err("demo: %s: pipe() failed", __func__);
e46b8fb1	434	return SR_ERR;
c03ed397	435	}
85b5af06	436
ab331b67 UH	437	channels[0] = g_io_channel_unix_new(ctx->pipe_fds[0]);
ab331b67 UH	438	channels[1] = g_io_channel_unix_new(ctx->pipe_fds[1]);
d35aaf02 UH	439
	440	/* Set channel encoding to binary (default is UTF-8). */
	441	g_io_channel_set_encoding(channels[0], NULL, NULL);
	442	g_io_channel_set_encoding(channels[1], NULL, NULL);
	443
	444	/* Make channels to unbuffered. */
	445	g_io_channel_set_buffered(channels[0], FALSE);
	446	g_io_channel_set_buffered(channels[1], FALSE);
	447
ab331b67 UH	448	sr_source_add(ctx->pipe_fds[0], G_IO_IN \| G_IO_ERR, 40,
ab331b67 UH	449	receive_data, ctx->session_dev_id);
85b5af06 UH	450
	451	/* Run the demo thread. */
	452	g_thread_init(NULL);
c03ed397	453	/* This must to be done between g_thread_init() & g_thread_create(). */
ab331b67	454	ctx->timer = g_timer_new();
85b5af06 UH	455	thread_running = 1;
85b5af06 UH	456	my_thread =
ab331b67	457	g_thread_create((GThreadFunc)thread_func, ctx, TRUE, NULL);
c03ed397 UH	458	if (!my_thread) {
	459	sr_err("demo: %s: g_thread_create failed", __func__);
	460	return SR_ERR; /* TODO */
	461	}
6239c175	462
27a3a6fe UH	463	if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
27a3a6fe UH	464	sr_err("demo: %s: packet malloc failed", __func__);
e46b8fb1	465	return SR_ERR_MALLOC;
27a3a6fe UH	466	}
	467
	468	if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
	469	sr_err("demo: %s: header malloc failed", __func__);
	470	return SR_ERR_MALLOC;
	471	}
6239c175	472
5a2326a7	473	packet->type = SR_DF_HEADER;
9c939c51	474	packet->payload = header;
6239c175 UH	475	header->feed_version = 1;
6239c175 UH	476	gettimeofday(&header->starttime, NULL);
ab331b67	477	sr_session_send(ctx->session_dev_id, packet);
f366e86c BV	478
	479	/* Send metadata about the SR_DF_LOGIC packets to come. */
	480	packet->type = SR_DF_META_LOGIC;
	481	packet->payload = &meta;
	482	meta.samplerate = cur_samplerate;
	483	meta.num_probes = NUM_PROBES;
	484	sr_session_send(ctx->session_dev_id, packet);
	485
27a3a6fe UH	486	g_free(header);
27a3a6fe UH	487	g_free(packet);
6239c175	488
e46b8fb1	489	return SR_OK;
6239c175 UH	490	}
6239c175 UH	491
3cd3a20b UH	492	/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
3cd3a20b UH	493	static int hw_dev_acquisition_stop(int dev_index, void *cb_data)
6239c175	494	{
17e1afcb	495	/* Avoid compiler warnings. */
bb7ef793	496	(void)dev_index;
3cd3a20b	497	(void)cb_data;
6239c175	498
1924f59f HE	499	/* Stop generate thread. */
1924f59f HE	500	thread_running = 0;
3010f21c UH	501
3010f21c UH	502	return SR_OK;
6239c175 UH	503	}
6239c175 UH	504
c09f0b57	505	SR_PRIV struct sr_dev_driver demo_driver_info = {
e519ba86 UH	506	.name = "demo",
	507	.longname = "Demo driver and pattern generator",
	508	.api_version = 1,
	509	.init = hw_init,
	510	.cleanup = hw_cleanup,
e7eb703f UH	511	.dev_open = hw_dev_open,
e7eb703f UH	512	.dev_close = hw_dev_close,
5097b0d0	513	.dev_info_get = hw_dev_info_get,
e7eb703f	514	.dev_status_get = hw_dev_status_get,
ffedd0bf	515	.hwcap_get_all = hw_hwcap_get_all,
a9a245b4	516	.dev_config_set = hw_dev_config_set,
69040b7c UH	517	.dev_acquisition_start = hw_dev_acquisition_start,
69040b7c UH	518	.dev_acquisition_stop = hw_dev_acquisition_stop,
6239c175	519	};