[libsigrok.git] / hardware / mastech-va18b / api.c

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
 *
 * 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 <string.h>
#include <fcntl.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"

#define MIN_NUM_SAMPLES 1

struct context {
	uint64_t limit_samples;
	uint64_t limit_msec; /* TODO: Implement. */
	uint64_t num_samples;
	void *session_dev_id;
	struct sr_serial_dev_inst *serial;
	uint8_t bytes[14 + 1];
	int byte_counter;
	gboolean synchronized;
	gboolean got_14_bytes;
};

static const int hwcaps[] = {
	SR_HWCAP_OSCILLOSCOPE,
	SR_HWCAP_LIMIT_SAMPLES,
	// SR_HWCAP_LIMIT_MSEC,
	// SR_HWCAP_CONTINUOUS,
	0,
};

static const char *probe_names[] = {
	"Probe",
	NULL,
};

static GSList *dev_insts = NULL;

/* Function prototypes. */
static int hw_dev_acquisition_stop(int dev_index, void *cb_data);

static int hw_init(const char *devinfo)
{
	struct sr_dev_inst *sdi;
	struct context *ctx;
	int devcnt = 0;

	/* Avoid compiler warnings. */
	(void)devinfo; /* TODO: This specifies the serial port to use. */

	if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
		sr_err("va18b: %s: ctx malloc failed.", __func__);
		return 0;
	}

	ctx->limit_samples = 0;
	ctx->limit_msec = 0;
	ctx->num_samples = 0;
	ctx->session_dev_id = NULL;
	ctx->serial = NULL;
	memset(ctx->bytes, 0x00, 14 + 1);
	ctx->byte_counter = 0;
	ctx->synchronized = FALSE;
	ctx->got_14_bytes = FALSE;

	if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_ACTIVE,
				    "Mastech", "VA18B", ""))) {
		sr_err("va18b: %s: sr_dev_inst_new returned NULL.", __func__);
		return 0;
	}

	sdi->priv = ctx;

	/* TODO: Don't hardcode serial port. */
	ctx->serial = sr_serial_dev_inst_new("/dev/ttyUSB0", -1);

	dev_insts = g_slist_append(dev_insts, sdi);

	devcnt = 1;

	return devcnt;
}

static int hw_dev_open(int dev_index)
{
	struct sr_dev_inst *sdi;
	struct context *ctx;

	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
		sr_err("va18b: %s: sdi was NULL.", __func__);
		return SR_ERR_BUG;
	}

	if (!(ctx = sdi->priv)) {
		sr_err("va18b: %s: sdi->priv was NULL.", __func__);
		return SR_ERR_BUG;
	}

	sr_dbg("va18b: %s: Opening serial port '%s'.", __func__,
	       ctx->serial->port);

	/* TODO: Check for != NULL. */

	/* TODO: O_NONBLOCK? */
	ctx->serial->fd = serial_open(ctx->serial->port, O_RDWR | O_NONBLOCK);
	if (ctx->serial->fd == -1) {
		sr_err("va18b: %s: Couldn't open serial port '%s'.", __func__,
		       ctx->serial->port);
		return SR_ERR;
	}

	serial_set_params(ctx->serial->fd, 2400, 8, 0, 1, 2 /* TODO */);

	return SR_OK;
}

static int hw_dev_close(int dev_index)
{
	struct sr_dev_inst *sdi;
	struct context *ctx;

	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
		sr_err("va18b: %s: sdi was NULL.", __func__);
		return SR_ERR_BUG;
	}

	if (!(ctx = sdi->priv)) {
		sr_err("va18b: %s: sdi->priv was NULL.", __func__);
		return SR_ERR_BUG;
	}

	/* TODO: Check for != NULL. */

	if (ctx->serial->fd != -1) {
		serial_close(ctx->serial->fd);
		ctx->serial->fd = -1;
		sdi->status = SR_ST_INACTIVE;
	}

	return SR_OK;
}

static int hw_cleanup(void)
{
	GSList *l;
	struct sr_dev_inst *sdi;
	struct context *ctx;

	/* Properly close and free all devices. */
	for (l = dev_insts; l; l = l->next) {
		if (!(sdi = l->data)) {
			/* Log error, but continue cleaning up the rest. */
			sr_err("va18b: %s: sdi was NULL, continuing.",
			       __func__);
			continue;
		}
		if (!(ctx = sdi->priv)) {
			/* Log error, but continue cleaning up the rest. */
			sr_err("va18b: %s: sdi->priv was NULL, continuing.",
			       __func__);
			continue;
		}

		/* TODO: Check for serial != NULL. */
		if (ctx->serial->fd != -1)
			serial_close(ctx->serial->fd);
		sr_serial_dev_inst_free(ctx->serial);

		sr_dev_inst_free(sdi);
	}

	g_slist_free(dev_insts);
	dev_insts = NULL;

	return SR_OK;
}

static const void *hw_dev_info_get(int dev_index, int dev_info_id)
{
	struct sr_dev_inst *sdi;
	struct context *ctx;
	const void *info;
	uint64_t tmp;
	int tmpint;

	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
		sr_err("va18b: %s: sdi was NULL.", __func__);
		return NULL;
	}

	if (!(ctx = sdi->priv)) {
		sr_err("va18b: %s: sdi->priv was NULL.", __func__);
		return NULL;
	}

	sr_spew("va18b: %s: dev_index %d, dev_info_id %d.", __func__,
		dev_index, dev_info_id);

	switch (dev_info_id) {
	case SR_DI_INST:
		info = sdi;
		sr_spew("va18b: %s: Returning sdi.", __func__);
		break;
	case SR_DI_NUM_PROBES:
		tmpint = 1;
		info = (int *)tmpint;
		sr_spew("va18b: %s: Returning number of probes: 1.", __func__);
		break;
	case SR_DI_PROBE_NAMES:
		info = probe_names;
		sr_spew("va18b: %s: Returning probenames.", __func__);
		break;
	case SR_DI_CUR_SAMPLERATE:
		/* FIXME */
		tmp = 1;
		info = (uint64_t *)&tmp;
		sr_spew("va18b: %s: Returning samplerate: %" PRIu64 "Hz.",
			__func__, tmp);
		break;
	default:
		/* Unknown device info ID, return NULL. */
		sr_err("va18b: %s: Unknown device info ID: %d.",
		       __func__, dev_info_id);
		info = NULL;
		break;
	}

	return info;
}

static int hw_dev_status_get(int dev_index)
{
	struct sr_dev_inst *sdi;

	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
		sr_err("va18b: %s: sdi was NULL, device not found.", __func__);
		return SR_ST_NOT_FOUND;
	}

	sr_dbg("va18b: Returning status: %d.", sdi->status);

	return sdi->status;
}

static const int *hw_hwcap_get_all(void)
{
	sr_spew("va18b: Returning list of device capabilities.");

	return hwcaps;
}

static int hw_dev_config_set(int dev_index, int hwcap, const void *value)
{
	struct sr_dev_inst *sdi;
	struct context *ctx;

	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
		sr_err("va18b: %s: sdi was NULL.", __func__);
		return SR_ERR_BUG;
	}

	if (!(ctx = sdi->priv)) {
		sr_err("va18b: %s: sdi->priv was NULL.", __func__);
		return SR_ERR_BUG;
	}

	sr_spew("va18b: %s: dev_index %d, hwcap %d.", __func__,
		dev_index, hwcap);

	switch (hwcap) {
	case SR_HWCAP_PROBECONFIG:
		/* TODO: Required? */
		break;
	case SR_HWCAP_LIMIT_MSEC:
		if (*(const uint64_t *)value == 0) {
			sr_err("va18b: %s: LIMIT_MSEC can't be 0.", __func__);
			return SR_ERR;
		}
		ctx->limit_msec = *(const uint64_t *)value;
		sr_dbg("va18b: Setting LIMIT_MSEC to %" PRIu64 ".",
		       ctx->limit_msec);
		break;
	case SR_HWCAP_LIMIT_SAMPLES:
		if (*(const uint64_t *)value < MIN_NUM_SAMPLES) {
			sr_err("va18b: %s: LIMIT_SAMPLES too small.", __func__);
			return SR_ERR;
		}
		ctx->limit_samples = *(const uint64_t *)value;
		sr_dbg("va18b: Setting LIMIT_SAMPLES to %" PRIu64 ".",
		       ctx->limit_samples);
		break;
	default:
		/* Unknown capability, return SR_ERR. */
		sr_err("va18b: %s: Unknown capability: %d.", __func__, hwcap);
		return SR_ERR;
		break;
	}

	return SR_OK;
}

static uint8_t get_digit(uint8_t b1, uint8_t b2)
{
	uint8_t b;

	b = ((b1 & 0x0f) << 4) | (b2 & 0x0f);
	printf("0x%02x (b1: 0x%02x, b2: 0x%02x)\n", b, b1, b2);

	if (b == 0x7d) {
		printf("ret = 8\n");
		return 0;
	}
	else if (b == 0x05)
		return 1;
	else if (b == 0x5b)
		return 2;
	else if (b == 0x1f)
		return 3;
	else if (b == 0x27)
		return 4;
	else if (b == 0x3e)
		return 5;
	else if (b == 0x7e)
		return 6;
	else if (b == 0x15)
		return 7;
	else if (b == 0x7f)
		return 8;
	else if (b == 0x3f)
		return 9;
	else
		return 0xff; /* Error */

}

static int receive_data(int fd, int revents, void *cb_data)
{
	struct sr_dev_inst *sdi;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_analog analog;
	struct context *ctx;
	int num_probes;
	uint8_t b, left_nibble, right_nibble;

	if (!(sdi = cb_data)) {
		sr_err("va18b: %s: cb_data was NULL.", __func__);
		return FALSE;
	}

	if (!(ctx = sdi->priv)) {
		sr_err("va18b: %s: sdi->priv was NULL.", __func__);
		return FALSE;
	}

	if (revents != G_IO_IN) {
		sr_err("va18b: %s: No data?", __func__);
		return FALSE;
	}

	if (serial_read(fd, &b, 1) != 1) {
		sr_err("va18b: %s: Could not read a byte from serial port.",
		       __func__);
		return FALSE;
	}

	left_nibble = ((b & 0xf0) >> 4);

	/* Upon starting, we wait until we're at byte 1. */
	if (ctx->synchronized == FALSE && left_nibble != 1) {
		sr_spew("va18b: Waiting for byte #1 in order to synchronize "
			"(got byte #%d).", left_nibble);
		return TRUE; // FALSE?
	} else if (ctx->synchronized == FALSE && left_nibble == 1) {
		sr_dbg("va18b: Successfully synchronized to data stream.");
		ctx->synchronized = TRUE;
		ctx->byte_counter = 1;
	}

	/* TODO: Check for left_nibble in (1, 14). */

	ctx->bytes[ctx->byte_counter++] = b;

	/// sr_dbg("va18b: bc: %d", ctx->byte_counter);
	if (ctx->byte_counter == 14 + 1) {
		sr_dbg("va18b: Received all 14 bytes for this packet.");
		ctx->got_14_bytes = TRUE;
	} else {
		sr_spew("va18b: Didn't receive all 14 bytes, yet.");
		return TRUE; // FALSE?
	}

	printf("0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x "
	       "0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n",
	       ctx->bytes[1], ctx->bytes[2], ctx->bytes[3], ctx->bytes[4],
	       ctx->bytes[5], ctx->bytes[6], ctx->bytes[7], ctx->bytes[8],
	       ctx->bytes[9], ctx->bytes[10], ctx->bytes[11], ctx->bytes[12],
	       ctx->bytes[13], ctx->bytes[14]);

	printf("0x%02x %d %d %d\n",
	       get_digit(ctx->bytes[2], ctx->bytes[3]),
	       get_digit(ctx->bytes[4], ctx->bytes[5]),
	       get_digit(ctx->bytes[6], ctx->bytes[7]),
	       get_digit(ctx->bytes[8], ctx->bytes[9]));

	ctx->got_14_bytes = FALSE;
	ctx->byte_counter = 0;

	sr_dbg("va18b: Sending SR_DF_ANALOG packet with 1 sample.");
	/* TODO: timestamp. */
	num_probes = 1;
	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;
	analog.num_samples = 1;
	analog.mq = SR_MQ_VOLTAGE;
	analog.unit = SR_UNIT_VOLT;
	/* TODO: Check alloc return value. */
	analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes);
	// analog.data[0] = rand() % 42; /* Transmit dummy data for now. */
	analog.data[0] = b; /* Transmit dummy data for now. */
	sr_session_send(ctx->session_dev_id, &packet);

	ctx->num_samples++;

	/* Support for SR_HWCAP_LIMIT_SAMPLES. */
	if (ctx->limit_samples > 0 && ctx->num_samples > ctx->limit_samples) {
		hw_dev_acquisition_stop(0 /* FIXME? */, cb_data);
		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_analog meta;
	struct sr_dev_inst *sdi;
	struct context *ctx;

	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
		sr_err("va18b: %s: sdi was NULL.", __func__);
		return SR_ERR_BUG;
	}

	if (!(ctx = sdi->priv)) {
		sr_err("va18b: %s: sdi->priv was NULL.", __func__);
		return SR_ERR_BUG;
	}

	sr_dbg("va18b: Starting acquisition.");

	ctx->session_dev_id = cb_data;

	/* Send header packet to the session bus. */
	sr_dbg("va18b: Sending SR_DF_HEADER.");
	packet.type = SR_DF_HEADER;
	packet.payload = (uint8_t *)&header;
	header.feed_version = 1;
	gettimeofday(&header.starttime, NULL);
	sr_session_send(ctx->session_dev_id, &packet);

	/* Send metadata about the SR_DF_ANALOG packets to come. */
	sr_dbg("va18b: Sending SR_DF_META_ANALOG.");
	packet.type = SR_DF_META_ANALOG;
	packet.payload = &meta;
	meta.num_probes = 1;
	sr_session_send(ctx->session_dev_id, &packet);

	/* Hook up a dummy handler to receive data from the device. */
	// sr_source_add(-1, G_IO_IN, 0, receive_data, sdi);
	sr_source_add(ctx->serial->fd, G_IO_IN, -1, receive_data, sdi);

	return SR_OK;
}

static int hw_dev_acquisition_stop(int dev_index, void *cb_data)
{
	struct sr_datafeed_packet packet;

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

	sr_dbg("va18b: Stopping acquisition.");

	/* Send end packet to the session bus. */
	sr_dbg("va18b: Sending SR_DF_END.");
	packet.type = SR_DF_END;
	sr_session_send(cb_data, &packet);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver mastech_va18b_driver_info = {
	.name = "mastech-va18b",
	.longname = "Mastech VA18B",
	.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
eb1f1eb4 UH	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include <stdlib.h>
163f0523 UH	22	#include <string.h>
163f0523 UH	23	#include <fcntl.h>
45c59c8b BV	24	#include "libsigrok.h"
45c59c8b BV	25	#include "libsigrok-internal.h"
eb1f1eb4 UH	26
	27	#define MIN_NUM_SAMPLES 1
	28
	29	struct context {
	30	uint64_t limit_samples;
	31	uint64_t limit_msec; /* TODO: Implement. */
	32	uint64_t num_samples;
	33	void *session_dev_id;
163f0523 UH	34	struct sr_serial_dev_inst *serial;
	35	uint8_t bytes[14 + 1];
	36	int byte_counter;
	37	gboolean synchronized;
	38	gboolean got_14_bytes;
eb1f1eb4 UH	39	};
	40
	41	static const int hwcaps[] = {
	42	SR_HWCAP_OSCILLOSCOPE,
	43	SR_HWCAP_LIMIT_SAMPLES,
	44	// SR_HWCAP_LIMIT_MSEC,
	45	// SR_HWCAP_CONTINUOUS,
	46	0,
	47	};
	48
	49	static const char *probe_names[] = {
	50	"Probe",
	51	NULL,
	52	};
	53
	54	static GSList *dev_insts = NULL;
	55
	56	/* Function prototypes. */
	57	static int hw_dev_acquisition_stop(int dev_index, void *cb_data);
	58
	59	static int hw_init(const char *devinfo)
	60	{
	61	struct sr_dev_inst *sdi;
	62	struct context *ctx;
	63	int devcnt = 0;
	64
	65	/* Avoid compiler warnings. */
	66	(void)devinfo; /* TODO: This specifies the serial port to use. */
	67
	68	if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
	69	sr_err("va18b: %s: ctx malloc failed.", __func__);
	70	return 0;
	71	}
	72
	73	ctx->limit_samples = 0;
	74	ctx->limit_msec = 0;
	75	ctx->num_samples = 0;
	76	ctx->session_dev_id = NULL;
163f0523 UH	77	ctx->serial = NULL;
	78	memset(ctx->bytes, 0x00, 14 + 1);
	79	ctx->byte_counter = 0;
	80	ctx->synchronized = FALSE;
	81	ctx->got_14_bytes = FALSE;
eb1f1eb4 UH	82
	83	if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_ACTIVE,
	84	"Mastech", "VA18B", ""))) {
	85	sr_err("va18b: %s: sr_dev_inst_new returned NULL.", __func__);
	86	return 0;
	87	}
	88
	89	sdi->priv = ctx;
163f0523 UH	90
	91	/* TODO: Don't hardcode serial port. */
	92	ctx->serial = sr_serial_dev_inst_new("/dev/ttyUSB0", -1);
	93
eb1f1eb4 UH	94	dev_insts = g_slist_append(dev_insts, sdi);
	95
	96	devcnt = 1;
	97
	98	return devcnt;
	99	}
	100
	101	static int hw_dev_open(int dev_index)
	102	{
163f0523 UH	103	struct sr_dev_inst *sdi;
	104	struct context *ctx;
	105
	106	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
	107	sr_err("va18b: %s: sdi was NULL.", __func__);
	108	return SR_ERR_BUG;
	109	}
	110
	111	if (!(ctx = sdi->priv)) {
	112	sr_err("va18b: %s: sdi->priv was NULL.", __func__);
	113	return SR_ERR_BUG;
	114	}
eb1f1eb4	115
163f0523 UH	116	sr_dbg("va18b: %s: Opening serial port '%s'.", __func__,
	117	ctx->serial->port);
	118
	119	/* TODO: Check for != NULL. */
	120
	121	/* TODO: O_NONBLOCK? */
	122	ctx->serial->fd = serial_open(ctx->serial->port, O_RDWR \| O_NONBLOCK);
	123	if (ctx->serial->fd == -1) {
	124	sr_err("va18b: %s: Couldn't open serial port '%s'.", __func__,
	125	ctx->serial->port);
	126	return SR_ERR;
	127	}
	128
	129	serial_set_params(ctx->serial->fd, 2400, 8, 0, 1, 2 /* TODO */);
eb1f1eb4 UH	130
	131	return SR_OK;
	132	}
	133
	134	static int hw_dev_close(int dev_index)
	135	{
163f0523 UH	136	struct sr_dev_inst *sdi;
	137	struct context *ctx;
	138
	139	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
	140	sr_err("va18b: %s: sdi was NULL.", __func__);
	141	return SR_ERR_BUG;
	142	}
	143
	144	if (!(ctx = sdi->priv)) {
	145	sr_err("va18b: %s: sdi->priv was NULL.", __func__);
	146	return SR_ERR_BUG;
	147	}
eb1f1eb4	148
163f0523 UH	149	/* TODO: Check for != NULL. */
	150
	151	if (ctx->serial->fd != -1) {
	152	serial_close(ctx->serial->fd);
	153	ctx->serial->fd = -1;
	154	sdi->status = SR_ST_INACTIVE;
	155	}
eb1f1eb4 UH	156
	157	return SR_OK;
	158	}
	159
	160	static int hw_cleanup(void)
	161	{
	162	GSList *l;
	163	struct sr_dev_inst *sdi;
	164	struct context *ctx;
	165
	166	/* Properly close and free all devices. */
	167	for (l = dev_insts; l; l = l->next) {
	168	if (!(sdi = l->data)) {
	169	/* Log error, but continue cleaning up the rest. */
	170	sr_err("va18b: %s: sdi was NULL, continuing.",
	171	__func__);
	172	continue;
	173	}
	174	if (!(ctx = sdi->priv)) {
	175	/* Log error, but continue cleaning up the rest. */
	176	sr_err("va18b: %s: sdi->priv was NULL, continuing.",
	177	__func__);
	178	continue;
	179	}
	180
163f0523 UH	181	/* TODO: Check for serial != NULL. */
	182	if (ctx->serial->fd != -1)
	183	serial_close(ctx->serial->fd);
	184	sr_serial_dev_inst_free(ctx->serial);
eb1f1eb4 UH	185
	186	sr_dev_inst_free(sdi);
	187	}
	188
	189	g_slist_free(dev_insts);
	190	dev_insts = NULL;
	191
	192	return SR_OK;
	193	}
	194
	195	static const void *hw_dev_info_get(int dev_index, int dev_info_id)
	196	{
	197	struct sr_dev_inst *sdi;
	198	struct context *ctx;
	199	const void *info;
	200	uint64_t tmp;
	201	int tmpint;
	202
	203	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
	204	sr_err("va18b: %s: sdi was NULL.", __func__);
	205	return NULL;
	206	}
	207
	208	if (!(ctx = sdi->priv)) {
	209	sr_err("va18b: %s: sdi->priv was NULL.", __func__);
	210	return NULL;
	211	}
	212
	213	sr_spew("va18b: %s: dev_index %d, dev_info_id %d.", __func__,
	214	dev_index, dev_info_id);
	215
	216	switch (dev_info_id) {
	217	case SR_DI_INST:
	218	info = sdi;
	219	sr_spew("va18b: %s: Returning sdi.", __func__);
	220	break;
	221	case SR_DI_NUM_PROBES:
	222	tmpint = 1;
	223	info = (int *)tmpint;
	224	sr_spew("va18b: %s: Returning number of probes: 1.", __func__);
	225	break;
	226	case SR_DI_PROBE_NAMES:
	227	info = probe_names;
	228	sr_spew("va18b: %s: Returning probenames.", __func__);
	229	break;
	230	case SR_DI_CUR_SAMPLERATE:
	231	/* FIXME */
	232	tmp = 1;
	233	info = (uint64_t *)&tmp;
	234	sr_spew("va18b: %s: Returning samplerate: %" PRIu64 "Hz.",
	235	__func__, tmp);
	236	break;
	237	default:
	238	/* Unknown device info ID, return NULL. */
	239	sr_err("va18b: %s: Unknown device info ID: %d.",
	240	__func__, dev_info_id);
	241	info = NULL;
	242	break;
	243	}
	244
	245	return info;
	246	}
	247
	248	static int hw_dev_status_get(int dev_index)
249	{
250	struct sr_dev_inst *sdi;
251
252	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
253	sr_err("va18b: %s: sdi was NULL, device not found.", __func__);
254	return SR_ST_NOT_FOUND;
255	}
256
257	sr_dbg("va18b: Returning status: %d.", sdi->status);
258
259	return sdi->status;
260	}
261
262	static const int *hw_hwcap_get_all(void)
263	{
264	sr_spew("va18b: Returning list of device capabilities.");
265
266	return hwcaps;
267	}
268
269	static int hw_dev_config_set(int dev_index, int hwcap, const void *value)
270	{
271	struct sr_dev_inst *sdi;
272	struct context *ctx;
273
274	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
275	sr_err("va18b: %s: sdi was NULL.", __func__);
276	return SR_ERR_BUG;
277	}
278
279	if (!(ctx = sdi->priv)) {
280	sr_err("va18b: %s: sdi->priv was NULL.", __func__);
281	return SR_ERR_BUG;
282	}
283
284	sr_spew("va18b: %s: dev_index %d, hwcap %d.", __func__,
285	dev_index, hwcap);
286
287	switch (hwcap) {
288	case SR_HWCAP_PROBECONFIG:
289	/* TODO: Required? */
290	break;
291	case SR_HWCAP_LIMIT_MSEC:
292	if ((const uint64_t )value == 0) {
293	sr_err("va18b: %s: LIMIT_MSEC can't be 0.", __func__);
294	return SR_ERR;
295	}
296	ctx->limit_msec = (const uint64_t )value;
297	sr_dbg("va18b: Setting LIMIT_MSEC to %" PRIu64 ".",
298	ctx->limit_msec);
299	break;
300	case SR_HWCAP_LIMIT_SAMPLES:
301	if ((const uint64_t )value < MIN_NUM_SAMPLES) {
302	sr_err("va18b: %s: LIMIT_SAMPLES too small.", __func__);
303	return SR_ERR;
304	}
305	ctx->limit_samples = (const uint64_t )value;
306	sr_dbg("va18b: Setting LIMIT_SAMPLES to %" PRIu64 ".",
307	ctx->limit_samples);
308	break;
309	default:
310	/* Unknown capability, return SR_ERR. */
311	sr_err("va18b: %s: Unknown capability: %d.", __func__, hwcap);
312	return SR_ERR;
313	break;
314	}
315
316	return SR_OK;
317	}
318
163f0523 UH	319	static uint8_t get_digit(uint8_t b1, uint8_t b2)
	320	{
	321	uint8_t b;
	322
	323	b = ((b1 & 0x0f) << 4) \| (b2 & 0x0f);
	324	printf("0x%02x (b1: 0x%02x, b2: 0x%02x)\n", b, b1, b2);
	325
	326	if (b == 0x7d) {
	327	printf("ret = 8\n");
	328	return 0;
	329	}
	330	else if (b == 0x05)
	331	return 1;
	332	else if (b == 0x5b)
	333	return 2;
	334	else if (b == 0x1f)
	335	return 3;
	336	else if (b == 0x27)
	337	return 4;
	338	else if (b == 0x3e)
	339	return 5;
	340	else if (b == 0x7e)
	341	return 6;
	342	else if (b == 0x15)
	343	return 7;
	344	else if (b == 0x7f)
	345	return 8;
	346	else if (b == 0x3f)
	347	return 9;
	348	else
	349	return 0xff; /* Error */
	350
	351	}
	352
eb1f1eb4 UH	353	static int receive_data(int fd, int revents, void *cb_data)
	354	{
	355	struct sr_dev_inst *sdi;
	356	struct sr_datafeed_packet packet;
	357	struct sr_datafeed_analog analog;
	358	struct context *ctx;
	359	int num_probes;
163f0523	360	uint8_t b, left_nibble, right_nibble;
eb1f1eb4 UH	361
	362	if (!(sdi = cb_data)) {
	363	sr_err("va18b: %s: cb_data was NULL.", __func__);
	364	return FALSE;
	365	}
	366
	367	if (!(ctx = sdi->priv)) {
	368	sr_err("va18b: %s: sdi->priv was NULL.", __func__);
	369	return FALSE;
	370	}
	371
163f0523 UH	372	if (revents != G_IO_IN) {
	373	sr_err("va18b: %s: No data?", __func__);
	374	return FALSE;
	375	}
	376
	377	if (serial_read(fd, &b, 1) != 1) {
	378	sr_err("va18b: %s: Could not read a byte from serial port.",
	379	__func__);
	380	return FALSE;
	381	}
	382
	383	left_nibble = ((b & 0xf0) >> 4);
	384
	385	/* Upon starting, we wait until we're at byte 1. */
	386	if (ctx->synchronized == FALSE && left_nibble != 1) {
	387	sr_spew("va18b: Waiting for byte #1 in order to synchronize "
	388	"(got byte #%d).", left_nibble);
	389	return TRUE; // FALSE?
	390	} else if (ctx->synchronized == FALSE && left_nibble == 1) {
	391	sr_dbg("va18b: Successfully synchronized to data stream.");
	392	ctx->synchronized = TRUE;
	393	ctx->byte_counter = 1;
	394	}
	395
	396	/* TODO: Check for left_nibble in (1, 14). */
	397
	398	ctx->bytes[ctx->byte_counter++] = b;
	399
	400	/// sr_dbg("va18b: bc: %d", ctx->byte_counter);
	401	if (ctx->byte_counter == 14 + 1) {
	402	sr_dbg("va18b: Received all 14 bytes for this packet.");
	403	ctx->got_14_bytes = TRUE;
	404	} else {
	405	sr_spew("va18b: Didn't receive all 14 bytes, yet.");
	406	return TRUE; // FALSE?
	407	}
	408
	409	printf("0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x "
	410	"0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n",
	411	ctx->bytes[1], ctx->bytes[2], ctx->bytes[3], ctx->bytes[4],
	412	ctx->bytes[5], ctx->bytes[6], ctx->bytes[7], ctx->bytes[8],
	413	ctx->bytes[9], ctx->bytes[10], ctx->bytes[11], ctx->bytes[12],
	414	ctx->bytes[13], ctx->bytes[14]);
	415
	416	printf("0x%02x %d %d %d\n",
	417	get_digit(ctx->bytes[2], ctx->bytes[3]),
	418	get_digit(ctx->bytes[4], ctx->bytes[5]),
	419	get_digit(ctx->bytes[6], ctx->bytes[7]),
	420	get_digit(ctx->bytes[8], ctx->bytes[9]));
	421
	422	ctx->got_14_bytes = FALSE;
	423	ctx->byte_counter = 0;
	424
eb1f1eb4 UH	425	sr_dbg("va18b: Sending SR_DF_ANALOG packet with 1 sample.");
	426	/* TODO: timestamp. */
	427	num_probes = 1;
	428	packet.type = SR_DF_ANALOG;
	429	packet.payload = &analog;
	430	analog.num_samples = 1;
	431	analog.mq = SR_MQ_VOLTAGE;
	432	analog.unit = SR_UNIT_VOLT;
	433	/* TODO: Check alloc return value. */
	434	analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes);
163f0523 UH	435	// analog.data[0] = rand() % 42; /* Transmit dummy data for now. */
163f0523 UH	436	analog.data[0] = b; /* Transmit dummy data for now. */
eb1f1eb4 UH	437	sr_session_send(ctx->session_dev_id, &packet);
	438
	439	ctx->num_samples++;
	440
	441	/* Support for SR_HWCAP_LIMIT_SAMPLES. */
	442	if (ctx->limit_samples > 0 && ctx->num_samples > ctx->limit_samples) {
	443	hw_dev_acquisition_stop(0 /* FIXME? */, cb_data);
	444	return FALSE;
	445	}
	446
	447	return TRUE;
	448	}
	449
	450	static int hw_dev_acquisition_start(int dev_index, void *cb_data)
	451	{
	452	struct sr_datafeed_packet packet;
	453	struct sr_datafeed_header header;
	454	struct sr_datafeed_meta_analog meta;
	455	struct sr_dev_inst *sdi;
	456	struct context *ctx;
	457
	458	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
	459	sr_err("va18b: %s: sdi was NULL.", __func__);
	460	return SR_ERR_BUG;
	461	}
	462
	463	if (!(ctx = sdi->priv)) {
	464	sr_err("va18b: %s: sdi->priv was NULL.", __func__);
	465	return SR_ERR_BUG;
	466	}
	467
	468	sr_dbg("va18b: Starting acquisition.");
	469
	470	ctx->session_dev_id = cb_data;
	471
	472	/* Send header packet to the session bus. */
	473	sr_dbg("va18b: Sending SR_DF_HEADER.");
	474	packet.type = SR_DF_HEADER;
	475	packet.payload = (uint8_t *)&header;
	476	header.feed_version = 1;
	477	gettimeofday(&header.starttime, NULL);
	478	sr_session_send(ctx->session_dev_id, &packet);
	479
	480	/* Send metadata about the SR_DF_ANALOG packets to come. */
	481	sr_dbg("va18b: Sending SR_DF_META_ANALOG.");
	482	packet.type = SR_DF_META_ANALOG;
	483	packet.payload = &meta;
	484	meta.num_probes = 1;
	485	sr_session_send(ctx->session_dev_id, &packet);
	486
	487	/* Hook up a dummy handler to receive data from the device. */
163f0523 UH	488	// sr_source_add(-1, G_IO_IN, 0, receive_data, sdi);
163f0523 UH	489	sr_source_add(ctx->serial->fd, G_IO_IN, -1, receive_data, sdi);
eb1f1eb4 UH	490
	491	return SR_OK;
	492	}
	493
	494	static int hw_dev_acquisition_stop(int dev_index, void *cb_data)
	495	{
	496	struct sr_datafeed_packet packet;
	497
	498	/* Avoid compiler warnings. */
	499	(void)dev_index;
	500
	501	sr_dbg("va18b: Stopping acquisition.");
	502
	503	/* Send end packet to the session bus. */
	504	sr_dbg("va18b: Sending SR_DF_END.");
	505	packet.type = SR_DF_END;
	506	sr_session_send(cb_data, &packet);
	507
	508	return SR_OK;
	509	}
	510
	511	SR_PRIV struct sr_dev_driver mastech_va18b_driver_info = {
	512	.name = "mastech-va18b",
	513	.longname = "Mastech VA18B",
	514	.api_version = 1,
	515	.init = hw_init,
	516	.cleanup = hw_cleanup,
	517	.dev_open = hw_dev_open,
	518	.dev_close = hw_dev_close,
	519	.dev_info_get = hw_dev_info_get,
	520	.dev_status_get = hw_dev_status_get,
	521	.hwcap_get_all = hw_hwcap_get_all,
	522	.dev_config_set = hw_dev_config_set,
	523	.dev_acquisition_start = hw_dev_acquisition_start,
	524	.dev_acquisition_stop = hw_dev_acquisition_stop,
	525	};