[libsigrok.git] / src / hardware / pce-322a / protocol.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2016 George Hopkins <george-hopkins@null.net>
 * Copyright (C) 2016 Matthieu Guillaumin <matthieu@guillaum.in>
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>
#include "protocol.h"

static int send_command(const struct sr_dev_inst *sdi, uint16_t command)
{
	struct sr_serial_dev_inst *serial;
	uint8_t buffer[2];

	buffer[0] = command >> 8;
	buffer[1] = command;

	if (!(serial = sdi->conn))
		return SR_ERR;

	return serial_write_blocking(serial, (const void *)buffer, 2, 0);
}

static int send_long_command(const struct sr_dev_inst *sdi, uint32_t command)
{
	struct sr_serial_dev_inst *serial;
	uint8_t buffer[4];

	buffer[0] = command >> 24;
	buffer[1] = command >> 16;
	buffer[2] = command >> 8;
	buffer[3] = command;

	if (!(serial = sdi->conn))
		return SR_ERR;

	return serial_write_blocking(serial, (const void *)buffer, 4, 0);
}

static void send_data(const struct sr_dev_inst *sdi, float sample)
{
	struct dev_context *devc;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_analog analog;
	struct sr_analog_encoding encoding;
	struct sr_analog_meaning meaning;
	struct sr_analog_spec spec;

	devc = sdi->priv;

	sr_analog_init(&analog, &encoding, &meaning, &spec, 1);
	meaning.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
	meaning.mqflags = devc->cur_mqflags;
	meaning.unit = SR_UNIT_DECIBEL_SPL;
	meaning.channels = sdi->channels;
	analog.num_samples = 1;
	analog.data = &sample;
	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;
	sr_session_send(sdi, &packet);

	devc->num_samples++;
	/* Limiting number of samples is only supported for live data. */
	if (devc->cur_data_source == DATA_SOURCE_LIVE && devc->limit_samples && devc->num_samples >= devc->limit_samples)
		sr_dev_acquisition_stop((struct sr_dev_inst *)sdi);
}

static void process_measurement(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	unsigned short value;

	devc = sdi->priv;

	if (devc->buffer[3] & (1 << 0)) {
		devc->cur_mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_C;
		devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_A;
	} else {
		devc->cur_mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_A;
		devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_C;
	}

	if (devc->buffer[3] & (1 << 1)) {
		devc->cur_mqflags |= SR_MQFLAG_SPL_TIME_WEIGHT_S;
		devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_F;
	} else {
		devc->cur_mqflags |= SR_MQFLAG_SPL_TIME_WEIGHT_F;
		devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_S;
	}

	devc->cur_meas_range = devc->buffer[4] & 3;

	if (devc->buffer[4] & (1 << 2)) {
		devc->cur_mqflags |= SR_MQFLAG_MAX;
		devc->cur_mqflags &= ~SR_MQFLAG_MIN;
	} else if (devc->buffer[4] & (1 << 3)) {
		devc->cur_mqflags |= SR_MQFLAG_MIN;
		devc->cur_mqflags &= ~SR_MQFLAG_MAX;
	} else {
		devc->cur_mqflags &= ~SR_MQFLAG_MIN;
		devc->cur_mqflags &= ~SR_MQFLAG_MAX;
	}

	value = devc->buffer[1] << 8 | devc->buffer[2];
	send_data(sdi, value / 10.0);
}

static void process_memory_measurement(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	uint16_t value;

	devc = sdi->priv;
	value = devc->buffer[devc->buffer_len - 1] << 8;
	value |= devc->buffer[devc->buffer_len - 2];

	send_data(sdi, value / 10.0);
}

static void process_byte(const struct sr_dev_inst *sdi, const unsigned char c)
{
	struct dev_context *devc;
	unsigned int i;

	devc = sdi->priv;

	if (devc->buffer_len < BUFFER_SIZE) {
		devc->buffer[devc->buffer_len++] = c;
	} else {
		for (i = 1; i < BUFFER_SIZE; i++)
			devc->buffer[i - 1] = devc->buffer[i];
		devc->buffer[BUFFER_SIZE - 1] = c;
	}

	if (devc->buffer_len == BUFFER_SIZE && devc->buffer[0] == 0x7f
			&& devc->buffer[BUFFER_SIZE - 1] == 0x00) {
		process_measurement(sdi);
		devc->buffer_len = 0;
	}
}

static void process_usage_byte(const struct sr_dev_inst *sdi, uint8_t c)
{
	struct dev_context *devc;
	unsigned int i;

	devc = sdi->priv;

	if (devc->buffer_len < MEM_USAGE_BUFFER_SIZE) {
		devc->buffer[devc->buffer_len++] = c;
	} else {
		for (i = 1; i < MEM_USAGE_BUFFER_SIZE; i++)
			devc->buffer[i - 1] = devc->buffer[i];
		devc->buffer[MEM_USAGE_BUFFER_SIZE - 1] = c;
	}

	if (devc->buffer_len == MEM_USAGE_BUFFER_SIZE && devc->buffer[0] == 0xd1
			&& devc->buffer[1] == 0x05 && devc->buffer[2] == 0x00
			&& devc->buffer[3] == 0x01 && devc->buffer[4] == 0xd2
			&& devc->buffer[MEM_USAGE_BUFFER_SIZE - 1] == 0x20) {
		devc->memory_block_usage = devc->buffer[5] << 8 | devc->buffer[6];
		devc->memory_last_block_usage = devc->buffer[7];
		sr_warn("Memory usage: %d blocks of 256 bytes, 1 block of %d bytes",
			devc->memory_block_usage - 1, devc->memory_last_block_usage);
		devc->buffer_len = 0;
		devc->buffer_skip = 1;
		devc->memory_state = MEM_STATE_REQUEST_MEMORY_BLOCK;
		devc->memory_block_cursor = 0;
		devc->memory_block_counter = 0;
	}
}

static void process_memory_byte(const struct sr_dev_inst *sdi, uint8_t c)
{
	struct dev_context *devc;
	unsigned int i;

	devc = sdi->priv;

	if (devc->buffer_len < MEM_DATA_BUFFER_SIZE) {
		devc->buffer[devc->buffer_len++] = c;
	} else {
		for (i = 1; i < MEM_DATA_BUFFER_SIZE; i++)
			devc->buffer[i - 1] = devc->buffer[i];
		devc->buffer[MEM_DATA_BUFFER_SIZE - 1] = c;
	}

	if (devc->buffer_skip == 0 \
			&& (devc->buffer[devc->buffer_len-2] & 0x7f) == 0x7f
			&& (devc->buffer[devc->buffer_len-1] & 0xf7) == 0xf7) {
		/* Recording session header bytes found, load next 7 bytes. */
		devc->buffer_skip = MEM_DATA_BUFFER_SIZE - 2;
	}

	if (devc->buffer_skip == 0 && devc->buffer_len == MEM_DATA_BUFFER_SIZE
			&& (devc->buffer[0] & 0x7f) == 0x7f && (devc->buffer[1] & 0xf7) == 0xf7
			&& devc->buffer[2] == 0x01 && devc->buffer[3] == 0x00) {
		/* Print information about recording. */
		sr_err("Recording dB(%X) %02x/%02x/%02x %02x:%02x:%02x ",
			devc->buffer[4], devc->buffer[5], devc->buffer[6], devc->buffer[7],
			devc->buffer[8] & 0x3f, devc->buffer[9], devc->buffer[10]);
		/* Set dBA/dBC flag for recording. */
		if (devc->buffer[4] == 0x0c) {
			devc->cur_mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_C;
			devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_A;
		} else {
			devc->cur_mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_A;
			devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_C;
		}
		send_data(sdi, -1.0); /* Signal switch of recording. */
		devc->buffer_skip = 2;
	}

	if (devc->buffer_skip == 0) {
		process_memory_measurement(sdi);
		devc->buffer_skip = 1;
	} else {
		devc->buffer_skip -= 1;
	}

	devc->memory_block_cursor++; /* uint8_t goes back to 0 after 255. */
	if (devc->memory_block_cursor == 0) {
		/* Current block is completed. */
		devc->memory_block_counter++;
		devc->memory_state = MEM_STATE_REQUEST_MEMORY_BLOCK;
	}
}

SR_PRIV int pce_322a_receive_data(int fd, int revents, void *cb_data)
{
	const struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;
	unsigned char c;

	(void)fd;

	if (!(sdi = cb_data))
		return TRUE;

	if (!(devc = sdi->priv))
		return TRUE;

	if (!(serial = sdi->conn))
		return TRUE;

	if (devc->cur_data_source == DATA_SOURCE_MEMORY) {
		switch (devc->memory_state) {
		case MEM_STATE_REQUEST_MEMORY_USAGE:
			/* At init, disconnect and request the memory status. */
			sr_warn("Requesting memory usage.");
			pce_322a_disconnect(sdi);
			devc->memory_state = MEM_STATE_GET_MEMORY_USAGE;
			devc->memory_block_usage = 0;
			devc->memory_last_block_usage = 0;
			devc->memory_block_counter = 0;
			devc->memory_block_cursor = 0;
			pce_322a_memory_status(sdi);
			break;
		case MEM_STATE_GET_MEMORY_USAGE:
			/* Listen for memory usage answer. */
			if (revents == G_IO_IN) {
				if (serial_read_nonblocking(serial, &c, 1) != 1)
					return TRUE;
				process_usage_byte(sdi, c);
			}
			break;
		case MEM_STATE_REQUEST_MEMORY_BLOCK:
			/* When cursor is 0, request next memory block. */
			if (devc->memory_block_counter <= devc->memory_block_usage) {
				sr_warn("Requesting memory block %d.", devc->memory_block_counter);
				pce_322a_memory_block(sdi, devc->memory_block_counter);
				devc->memory_state = MEM_STATE_GET_MEMORY_BLOCK;
			} else {
				sr_warn("Exhausted memory blocks.");
				return FALSE;
			}
			break;
		case MEM_STATE_GET_MEMORY_BLOCK:
			/* Stop after reading last byte of last block. */
			if (devc->memory_block_counter >= devc->memory_block_usage
					&& devc->memory_block_cursor >= devc->memory_last_block_usage) {
				sr_warn("Done reading memory (%d bytes).",
					256 * (devc->memory_block_counter - 1)
					+ devc->memory_block_cursor);
				return FALSE;
			}
			/* Listen for memory data. */
			if (revents == G_IO_IN) {
				if (serial_read_nonblocking(serial, &c, 1) != 1)
					return TRUE;
				process_memory_byte(sdi, c);
			}
			break;
		}
	} else {
		/* Listen for live data. */
		if (revents == G_IO_IN) {
			if (serial_read_nonblocking(serial, &c, 1) != 1)
				return TRUE;
			process_byte(sdi, c);
		}
	}

	return TRUE;
}

SR_PRIV int pce_322a_connect(const struct sr_dev_inst *sdi)
{
	return send_command(sdi, CMD_CONNECT);
}

SR_PRIV int pce_322a_disconnect(const struct sr_dev_inst *sdi)
{
	return send_command(sdi, CMD_DISCONNECT);
}

SR_PRIV int pce_322a_memory_status(const struct sr_dev_inst *sdi)
{
	return send_command(sdi, CMD_MEMORY_STATUS);
}

SR_PRIV int pce_322a_memory_clear(const struct sr_dev_inst *sdi)
{
	return send_command(sdi, CMD_MEMORY_CLEAR);
}

SR_PRIV int pce_322a_memory_block(const struct sr_dev_inst *sdi, uint16_t memblk)
{
	uint8_t buf0 = memblk;
	uint8_t buf1 = memblk >> 8;
	uint32_t command = CMD_MEMORY_TRANSFER << 16 | buf0 << 8 | buf1;
	return send_long_command(sdi, command);
}

SR_PRIV uint64_t pce_322a_weight_freq_get(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	devc = sdi->priv;

	return devc->cur_mqflags & (SR_MQFLAG_SPL_FREQ_WEIGHT_A | SR_MQFLAG_SPL_FREQ_WEIGHT_C);
}

SR_PRIV int pce_322a_weight_freq_set(const struct sr_dev_inst *sdi, uint64_t freqw)
{
	struct dev_context *devc;

	devc = sdi->priv;

	if (devc->cur_mqflags & freqw)
		return SR_OK;

	return send_command(sdi, CMD_TOGGLE_WEIGHT_FREQ);
}

SR_PRIV uint64_t pce_322a_weight_time_get(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	devc = sdi->priv;

	return devc->cur_mqflags & (SR_MQFLAG_SPL_TIME_WEIGHT_F | SR_MQFLAG_SPL_TIME_WEIGHT_S);
}

SR_PRIV int pce_322a_weight_time_set(const struct sr_dev_inst *sdi, uint64_t timew)
{
	struct dev_context *devc;

	devc = sdi->priv;

	if (devc->cur_mqflags & timew)
		return SR_OK;

	return send_command(sdi, CMD_TOGGLE_WEIGHT_TIME);
}

SR_PRIV int pce_322a_meas_range_get(const struct sr_dev_inst *sdi,
		uint64_t *low, uint64_t *high)
{
	struct dev_context *devc;

	devc = sdi->priv;

	switch (devc->cur_meas_range) {
	case MEAS_RANGE_30_130:
		*low = 30;
		*high = 130;
		break;
	case MEAS_RANGE_30_80:
		*low = 30;
		*high = 80;
		break;
	case MEAS_RANGE_50_100:
		*low = 50;
		*high = 100;
		break;
	case MEAS_RANGE_80_130:
		*low = 80;
		*high = 130;
		break;
	default:
		return SR_ERR;
	}

	return SR_OK;
}

SR_PRIV int pce_322a_meas_range_set(const struct sr_dev_inst *sdi,
		uint64_t low, uint64_t high)
{
	struct dev_context *devc;
	uint8_t range;
	int ret = SR_OK;

	devc = sdi->priv;

	if (low == 30 && high == 130)
		range = MEAS_RANGE_30_130;
	else if (low == 30 && high == 80)
		range = MEAS_RANGE_30_80;
	else if (low == 50 && high == 100)
		range = MEAS_RANGE_50_100;
	else if (low == 80 && high == 130)
		range = MEAS_RANGE_80_130;
	else
		return SR_ERR;

	while (range != devc->cur_meas_range) {
		ret = send_command(sdi, CMD_TOGGLE_MEAS_RANGE);
		if (ret != SR_OK)
			break;
		range = (range - 1) & 3;
	}

	return ret;
}

SR_PRIV int pce_322a_power_off(const struct sr_dev_inst *sdi)
{
	return send_command(sdi, CMD_POWER_OFF);
}
Commit	Line	Data
5a2c71cc GH	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2016 George Hopkins <george-hopkins@null.net>
ae87e02f	5	* Copyright (C) 2016 Matthieu Guillaumin <matthieu@guillaum.in>
5a2c71cc GH	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 3 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, see <http://www.gnu.org/licenses/>.
	19	*/
	20
	21	#include <config.h>
	22	#include "protocol.h"
	23
	24	static int send_command(const struct sr_dev_inst *sdi, uint16_t command)
	25	{
	26	struct sr_serial_dev_inst *serial;
	27	uint8_t buffer[2];
	28
	29	buffer[0] = command >> 8;
	30	buffer[1] = command;
	31
	32	if (!(serial = sdi->conn))
	33	return SR_ERR;
	34
379e95c5	35	return serial_write_blocking(serial, (const void *)buffer, 2, 0);
5a2c71cc GH	36	}
5a2c71cc GH	37
ae87e02f MG	38	static int send_long_command(const struct sr_dev_inst *sdi, uint32_t command)
	39	{
	40	struct sr_serial_dev_inst *serial;
	41	uint8_t buffer[4];
	42
	43	buffer[0] = command >> 24;
	44	buffer[1] = command >> 16;
	45	buffer[2] = command >> 8;
	46	buffer[3] = command;
	47
	48	if (!(serial = sdi->conn))
	49	return SR_ERR;
	50
379e95c5	51	return serial_write_blocking(serial, (const void *)buffer, 4, 0);
ae87e02f MG	52	}
ae87e02f MG	53
5a2c71cc GH	54	static void send_data(const struct sr_dev_inst *sdi, float sample)
	55	{
	56	struct dev_context *devc;
	57	struct sr_datafeed_packet packet;
	58	struct sr_datafeed_analog analog;
	59	struct sr_analog_encoding encoding;
	60	struct sr_analog_meaning meaning;
	61	struct sr_analog_spec spec;
	62
	63	devc = sdi->priv;
	64
	65	sr_analog_init(&analog, &encoding, &meaning, &spec, 1);
	66	meaning.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
	67	meaning.mqflags = devc->cur_mqflags;
	68	meaning.unit = SR_UNIT_DECIBEL_SPL;
	69	meaning.channels = sdi->channels;
	70	analog.num_samples = 1;
	71	analog.data = &sample;
	72	packet.type = SR_DF_ANALOG;
	73	packet.payload = &analog;
	74	sr_session_send(sdi, &packet);
	75
	76	devc->num_samples++;
ae87e02f MG	77	/* Limiting number of samples is only supported for live data. */
ae87e02f MG	78	if (devc->cur_data_source == DATA_SOURCE_LIVE && devc->limit_samples && devc->num_samples >= devc->limit_samples)
d2f7c417	79	sr_dev_acquisition_stop((struct sr_dev_inst *)sdi);
5a2c71cc GH	80	}
	81
	82	static void process_measurement(const struct sr_dev_inst *sdi)
	83	{
	84	struct dev_context *devc;
	85	unsigned short value;
	86
	87	devc = sdi->priv;
	88
	89	if (devc->buffer[3] & (1 << 0)) {
	90	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_C;
	91	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_A;
	92	} else {
	93	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_A;
	94	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_C;
	95	}
	96
	97	if (devc->buffer[3] & (1 << 1)) {
	98	devc->cur_mqflags \|= SR_MQFLAG_SPL_TIME_WEIGHT_S;
	99	devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_F;
	100	} else {
	101	devc->cur_mqflags \|= SR_MQFLAG_SPL_TIME_WEIGHT_F;
	102	devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_S;
	103	}
	104
	105	devc->cur_meas_range = devc->buffer[4] & 3;
	106
	107	if (devc->buffer[4] & (1 << 2)) {
	108	devc->cur_mqflags \|= SR_MQFLAG_MAX;
	109	devc->cur_mqflags &= ~SR_MQFLAG_MIN;
	110	} else if (devc->buffer[4] & (1 << 3)) {
	111	devc->cur_mqflags \|= SR_MQFLAG_MIN;
	112	devc->cur_mqflags &= ~SR_MQFLAG_MAX;
	113	} else {
	114	devc->cur_mqflags &= ~SR_MQFLAG_MIN;
	115	devc->cur_mqflags &= ~SR_MQFLAG_MAX;
	116	}
	117
	118	value = devc->buffer[1] << 8 \| devc->buffer[2];
	119	send_data(sdi, value / 10.0);
	120	}
	121
ae87e02f MG	122	static void process_memory_measurement(const struct sr_dev_inst *sdi)
	123	{
	124	struct dev_context *devc;
	125	uint16_t value;
	126
	127	devc = sdi->priv;
	128	value = devc->buffer[devc->buffer_len - 1] << 8;
	129	value \|= devc->buffer[devc->buffer_len - 2];
	130
	131	send_data(sdi, value / 10.0);
	132	}
	133
5a2c71cc GH	134	static void process_byte(const struct sr_dev_inst *sdi, const unsigned char c)
	135	{
	136	struct dev_context *devc;
	137	unsigned int i;
	138
	139	devc = sdi->priv;
	140
	141	if (devc->buffer_len < BUFFER_SIZE) {
	142	devc->buffer[devc->buffer_len++] = c;
	143	} else {
	144	for (i = 1; i < BUFFER_SIZE; i++)
	145	devc->buffer[i - 1] = devc->buffer[i];
	146	devc->buffer[BUFFER_SIZE - 1] = c;
ae87e02f MG	147	}
	148
	149	if (devc->buffer_len == BUFFER_SIZE && devc->buffer[0] == 0x7f
	150	&& devc->buffer[BUFFER_SIZE - 1] == 0x00) {
	151	process_measurement(sdi);
	152	devc->buffer_len = 0;
	153	}
	154	}
	155
	156	static void process_usage_byte(const struct sr_dev_inst *sdi, uint8_t c)
	157	{
	158	struct dev_context *devc;
	159	unsigned int i;
	160
	161	devc = sdi->priv;
	162
	163	if (devc->buffer_len < MEM_USAGE_BUFFER_SIZE) {
	164	devc->buffer[devc->buffer_len++] = c;
	165	} else {
	166	for (i = 1; i < MEM_USAGE_BUFFER_SIZE; i++)
	167	devc->buffer[i - 1] = devc->buffer[i];
	168	devc->buffer[MEM_USAGE_BUFFER_SIZE - 1] = c;
	169	}
	170
	171	if (devc->buffer_len == MEM_USAGE_BUFFER_SIZE && devc->buffer[0] == 0xd1
	172	&& devc->buffer[1] == 0x05 && devc->buffer[2] == 0x00
	173	&& devc->buffer[3] == 0x01 && devc->buffer[4] == 0xd2
	174	&& devc->buffer[MEM_USAGE_BUFFER_SIZE - 1] == 0x20) {
	175	devc->memory_block_usage = devc->buffer[5] << 8 \| devc->buffer[6];
	176	devc->memory_last_block_usage = devc->buffer[7];
	177	sr_warn("Memory usage: %d blocks of 256 bytes, 1 block of %d bytes",
	178	devc->memory_block_usage - 1, devc->memory_last_block_usage);
	179	devc->buffer_len = 0;
	180	devc->buffer_skip = 1;
	181	devc->memory_state = MEM_STATE_REQUEST_MEMORY_BLOCK;
	182	devc->memory_block_cursor = 0;
	183	devc->memory_block_counter = 0;
	184	}
	185	}
	186
	187	static void process_memory_byte(const struct sr_dev_inst *sdi, uint8_t c)
	188	{
	189	struct dev_context *devc;
	190	unsigned int i;
	191
	192	devc = sdi->priv;
	193
	194	if (devc->buffer_len < MEM_DATA_BUFFER_SIZE) {
	195	devc->buffer[devc->buffer_len++] = c;
	196	} else {
	197	for (i = 1; i < MEM_DATA_BUFFER_SIZE; i++)
	198	devc->buffer[i - 1] = devc->buffer[i];
	199	devc->buffer[MEM_DATA_BUFFER_SIZE - 1] = c;
	200	}
	201
	202	if (devc->buffer_skip == 0 \
	203	&& (devc->buffer[devc->buffer_len-2] & 0x7f) == 0x7f
	204	&& (devc->buffer[devc->buffer_len-1] & 0xf7) == 0xf7) {
	205	/* Recording session header bytes found, load next 7 bytes. */
	206	devc->buffer_skip = MEM_DATA_BUFFER_SIZE - 2;
	207	}
	208
	209	if (devc->buffer_skip == 0 && devc->buffer_len == MEM_DATA_BUFFER_SIZE
	210	&& (devc->buffer[0] & 0x7f) == 0x7f && (devc->buffer[1] & 0xf7) == 0xf7
211	&& devc->buffer[2] == 0x01 && devc->buffer[3] == 0x00) {
212	/* Print information about recording. */
213	sr_err("Recording dB(%X) %02x/%02x/%02x %02x:%02x:%02x ",
214	devc->buffer[4], devc->buffer[5], devc->buffer[6], devc->buffer[7],
215	devc->buffer[8] & 0x3f, devc->buffer[9], devc->buffer[10]);
216	/* Set dBA/dBC flag for recording. */
217	if (devc->buffer[4] == 0x0c) {
218	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_C;
219	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_A;
220	} else {
221	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_A;
222	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_C;
5a2c71cc	223	}
ae87e02f MG	224	send_data(sdi, -1.0); /* Signal switch of recording. */
	225	devc->buffer_skip = 2;
	226	}
	227
	228	if (devc->buffer_skip == 0) {
	229	process_memory_measurement(sdi);
	230	devc->buffer_skip = 1;
	231	} else {
	232	devc->buffer_skip -= 1;
	233	}
	234
	235	devc->memory_block_cursor++; /* uint8_t goes back to 0 after 255. */
	236	if (devc->memory_block_cursor == 0) {
	237	/* Current block is completed. */
	238	devc->memory_block_counter++;
	239	devc->memory_state = MEM_STATE_REQUEST_MEMORY_BLOCK;
5a2c71cc GH	240	}
	241	}
	242
	243	SR_PRIV int pce_322a_receive_data(int fd, int revents, void *cb_data)
	244	{
	245	const struct sr_dev_inst *sdi;
	246	struct dev_context *devc;
	247	struct sr_serial_dev_inst *serial;
	248	unsigned char c;
	249
	250	(void)fd;
	251
	252	if (!(sdi = cb_data))
	253	return TRUE;
	254
	255	if (!(devc = sdi->priv))
	256	return TRUE;
	257
	258	if (!(serial = sdi->conn))
	259	return TRUE;
	260
ae87e02f MG	261	if (devc->cur_data_source == DATA_SOURCE_MEMORY) {
	262	switch (devc->memory_state) {
	263	case MEM_STATE_REQUEST_MEMORY_USAGE:
	264	/* At init, disconnect and request the memory status. */
	265	sr_warn("Requesting memory usage.");
	266	pce_322a_disconnect(sdi);
	267	devc->memory_state = MEM_STATE_GET_MEMORY_USAGE;
	268	devc->memory_block_usage = 0;
	269	devc->memory_last_block_usage = 0;
	270	devc->memory_block_counter = 0;
	271	devc->memory_block_cursor = 0;
	272	pce_322a_memory_status(sdi);
	273	break;
	274	case MEM_STATE_GET_MEMORY_USAGE:
	275	/* Listen for memory usage answer. */
	276	if (revents == G_IO_IN) {
	277	if (serial_read_nonblocking(serial, &c, 1) != 1)
	278	return TRUE;
	279	process_usage_byte(sdi, c);
	280	}
	281	break;
	282	case MEM_STATE_REQUEST_MEMORY_BLOCK:
	283	/* When cursor is 0, request next memory block. */
	284	if (devc->memory_block_counter <= devc->memory_block_usage) {
	285	sr_warn("Requesting memory block %d.", devc->memory_block_counter);
	286	pce_322a_memory_block(sdi, devc->memory_block_counter);
	287	devc->memory_state = MEM_STATE_GET_MEMORY_BLOCK;
	288	} else {
	289	sr_warn("Exhausted memory blocks.");
	290	return FALSE;
	291	}
	292	break;
	293	case MEM_STATE_GET_MEMORY_BLOCK:
	294	/* Stop after reading last byte of last block. */
	295	if (devc->memory_block_counter >= devc->memory_block_usage
	296	&& devc->memory_block_cursor >= devc->memory_last_block_usage) {
	297	sr_warn("Done reading memory (%d bytes).",
	298	256 * (devc->memory_block_counter - 1)
	299	+ devc->memory_block_cursor);
	300	return FALSE;
	301	}
	302	/* Listen for memory data. */
	303	if (revents == G_IO_IN) {
	304	if (serial_read_nonblocking(serial, &c, 1) != 1)
	305	return TRUE;
	306	process_memory_byte(sdi, c);
	307	}
	308	break;
	309	}
	310	} else {
	311	/* Listen for live data. */
	312	if (revents == G_IO_IN) {
	313	if (serial_read_nonblocking(serial, &c, 1) != 1)
	314	return TRUE;
	315	process_byte(sdi, c);
	316	}
5a2c71cc GH	317	}
	318
	319	return TRUE;
	320	}
	321
	322	SR_PRIV int pce_322a_connect(const struct sr_dev_inst *sdi)
	323	{
	324	return send_command(sdi, CMD_CONNECT);
	325	}
	326
	327	SR_PRIV int pce_322a_disconnect(const struct sr_dev_inst *sdi)
	328	{
	329	return send_command(sdi, CMD_DISCONNECT);
	330	}
	331
ae87e02f MG	332	SR_PRIV int pce_322a_memory_status(const struct sr_dev_inst *sdi)
	333	{
	334	return send_command(sdi, CMD_MEMORY_STATUS);
	335	}
	336
	337	SR_PRIV int pce_322a_memory_clear(const struct sr_dev_inst *sdi)
	338	{
	339	return send_command(sdi, CMD_MEMORY_CLEAR);
	340	}
	341
	342	SR_PRIV int pce_322a_memory_block(const struct sr_dev_inst *sdi, uint16_t memblk)
	343	{
	344	uint8_t buf0 = memblk;
	345	uint8_t buf1 = memblk >> 8;
	346	uint32_t command = CMD_MEMORY_TRANSFER << 16 \| buf0 << 8 \| buf1;
	347	return send_long_command(sdi, command);
	348	}
	349
5a2c71cc GH	350	SR_PRIV uint64_t pce_322a_weight_freq_get(const struct sr_dev_inst *sdi)
	351	{
	352	struct dev_context *devc;
	353
	354	devc = sdi->priv;
	355
	356	return devc->cur_mqflags & (SR_MQFLAG_SPL_FREQ_WEIGHT_A \| SR_MQFLAG_SPL_FREQ_WEIGHT_C);
	357	}
	358
	359	SR_PRIV int pce_322a_weight_freq_set(const struct sr_dev_inst *sdi, uint64_t freqw)
	360	{
	361	struct dev_context *devc;
	362
	363	devc = sdi->priv;
	364
	365	if (devc->cur_mqflags & freqw)
	366	return SR_OK;
	367
	368	return send_command(sdi, CMD_TOGGLE_WEIGHT_FREQ);
	369	}
	370
	371	SR_PRIV uint64_t pce_322a_weight_time_get(const struct sr_dev_inst *sdi)
	372	{
	373	struct dev_context *devc;
	374
	375	devc = sdi->priv;
	376
	377	return devc->cur_mqflags & (SR_MQFLAG_SPL_TIME_WEIGHT_F \| SR_MQFLAG_SPL_TIME_WEIGHT_S);
	378	}
	379
	380	SR_PRIV int pce_322a_weight_time_set(const struct sr_dev_inst *sdi, uint64_t timew)
	381	{
	382	struct dev_context *devc;
	383
	384	devc = sdi->priv;
	385
	386	if (devc->cur_mqflags & timew)
	387	return SR_OK;
	388
	389	return send_command(sdi, CMD_TOGGLE_WEIGHT_TIME);
	390	}
	391
	392	SR_PRIV int pce_322a_meas_range_get(const struct sr_dev_inst *sdi,
	393	uint64_t low, uint64_t high)
	394	{
	395	struct dev_context *devc;
	396
	397	devc = sdi->priv;
	398
	399	switch (devc->cur_meas_range) {
	400	case MEAS_RANGE_30_130:
	401	*low = 30;
	402	*high = 130;
	403	break;
	404	case MEAS_RANGE_30_80:
	405	*low = 30;
	406	*high = 80;
	407	break;
	408	case MEAS_RANGE_50_100:
	409	*low = 50;
	410	*high = 100;
	411	break;
	412	case MEAS_RANGE_80_130:
	413	*low = 80;
414	*high = 130;
415	break;
416	default:
417	return SR_ERR;
418	}
419
420	return SR_OK;
421	}
422
423	SR_PRIV int pce_322a_meas_range_set(const struct sr_dev_inst *sdi,
424	uint64_t low, uint64_t high)
425	{
426	struct dev_context *devc;
427	uint8_t range;
428	int ret = SR_OK;
429
430	devc = sdi->priv;
431
432	if (low == 30 && high == 130)
433	range = MEAS_RANGE_30_130;
434	else if (low == 30 && high == 80)
435	range = MEAS_RANGE_30_80;
436	else if (low == 50 && high == 100)
437	range = MEAS_RANGE_50_100;
438	else if (low == 80 && high == 130)
439	range = MEAS_RANGE_80_130;
440	else
441	return SR_ERR;
442
443	while (range != devc->cur_meas_range) {
444	ret = send_command(sdi, CMD_TOGGLE_MEAS_RANGE);
445	if (ret != SR_OK)
446	break;
447	range = (range - 1) & 3;
448	}
449
450	return ret;
451	}
452
453	SR_PRIV int pce_322a_power_off(const struct sr_dev_inst *sdi)
454	{
455	return send_command(sdi, CMD_POWER_OFF);
456	}