[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;

	if (serial_write_nonblocking(serial, (const void *)buffer, 2) != 2)
		return SR_ERR;

	return SR_OK;
}

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;

	if (serial_write_nonblocking(serial, (const void *)buffer, 4) != 4)
		return SR_ERR;

	return SR_OK;
}

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)
		sdi->driver->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
	35	if (serial_write_nonblocking(serial, (const void *)buffer, 2) != 2)
	36	return SR_ERR;
	37
	38	return SR_OK;
	39	}
	40
ae87e02f MG	41	static int send_long_command(const struct sr_dev_inst *sdi, uint32_t command)
	42	{
	43	struct sr_serial_dev_inst *serial;
	44	uint8_t buffer[4];
	45
	46	buffer[0] = command >> 24;
	47	buffer[1] = command >> 16;
	48	buffer[2] = command >> 8;
	49	buffer[3] = command;
	50
	51	if (!(serial = sdi->conn))
	52	return SR_ERR;
	53
	54	if (serial_write_nonblocking(serial, (const void *)buffer, 4) != 4)
	55	return SR_ERR;
	56
	57	return SR_OK;
	58	}
	59
5a2c71cc GH	60	static void send_data(const struct sr_dev_inst *sdi, float sample)
	61	{
	62	struct dev_context *devc;
	63	struct sr_datafeed_packet packet;
	64	struct sr_datafeed_analog analog;
	65	struct sr_analog_encoding encoding;
	66	struct sr_analog_meaning meaning;
	67	struct sr_analog_spec spec;
	68
	69	devc = sdi->priv;
	70
	71	sr_analog_init(&analog, &encoding, &meaning, &spec, 1);
	72	meaning.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
	73	meaning.mqflags = devc->cur_mqflags;
	74	meaning.unit = SR_UNIT_DECIBEL_SPL;
	75	meaning.channels = sdi->channels;
	76	analog.num_samples = 1;
	77	analog.data = &sample;
	78	packet.type = SR_DF_ANALOG;
	79	packet.payload = &analog;
	80	sr_session_send(sdi, &packet);
	81
	82	devc->num_samples++;
ae87e02f MG	83	/* Limiting number of samples is only supported for live data. */
ae87e02f MG	84	if (devc->cur_data_source == DATA_SOURCE_LIVE && devc->limit_samples && devc->num_samples >= devc->limit_samples)
5a2c71cc GH	85	sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi);
	86	}
	87
	88	static void process_measurement(const struct sr_dev_inst *sdi)
	89	{
	90	struct dev_context *devc;
	91	unsigned short value;
	92
	93	devc = sdi->priv;
	94
	95	if (devc->buffer[3] & (1 << 0)) {
	96	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_C;
	97	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_A;
	98	} else {
	99	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_A;
	100	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_C;
	101	}
	102
	103	if (devc->buffer[3] & (1 << 1)) {
	104	devc->cur_mqflags \|= SR_MQFLAG_SPL_TIME_WEIGHT_S;
	105	devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_F;
	106	} else {
	107	devc->cur_mqflags \|= SR_MQFLAG_SPL_TIME_WEIGHT_F;
	108	devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_S;
	109	}
	110
	111	devc->cur_meas_range = devc->buffer[4] & 3;
	112
	113	if (devc->buffer[4] & (1 << 2)) {
	114	devc->cur_mqflags \|= SR_MQFLAG_MAX;
	115	devc->cur_mqflags &= ~SR_MQFLAG_MIN;
	116	} else if (devc->buffer[4] & (1 << 3)) {
	117	devc->cur_mqflags \|= SR_MQFLAG_MIN;
	118	devc->cur_mqflags &= ~SR_MQFLAG_MAX;
	119	} else {
	120	devc->cur_mqflags &= ~SR_MQFLAG_MIN;
	121	devc->cur_mqflags &= ~SR_MQFLAG_MAX;
	122	}
	123
	124	value = devc->buffer[1] << 8 \| devc->buffer[2];
	125	send_data(sdi, value / 10.0);
	126	}
	127
ae87e02f MG	128	static void process_memory_measurement(const struct sr_dev_inst *sdi)
	129	{
	130	struct dev_context *devc;
	131	uint16_t value;
	132
	133	devc = sdi->priv;
	134	value = devc->buffer[devc->buffer_len - 1] << 8;
	135	value \|= devc->buffer[devc->buffer_len - 2];
	136
	137	send_data(sdi, value / 10.0);
	138	}
	139
5a2c71cc GH	140	static void process_byte(const struct sr_dev_inst *sdi, const unsigned char c)
	141	{
	142	struct dev_context *devc;
	143	unsigned int i;
	144
	145	devc = sdi->priv;
	146
	147	if (devc->buffer_len < BUFFER_SIZE) {
	148	devc->buffer[devc->buffer_len++] = c;
	149	} else {
	150	for (i = 1; i < BUFFER_SIZE; i++)
	151	devc->buffer[i - 1] = devc->buffer[i];
	152	devc->buffer[BUFFER_SIZE - 1] = c;
ae87e02f MG	153	}
	154
	155	if (devc->buffer_len == BUFFER_SIZE && devc->buffer[0] == 0x7f
	156	&& devc->buffer[BUFFER_SIZE - 1] == 0x00) {
	157	process_measurement(sdi);
	158	devc->buffer_len = 0;
	159	}
	160	}
	161
	162	static void process_usage_byte(const struct sr_dev_inst *sdi, uint8_t c)
	163	{
	164	struct dev_context *devc;
	165	unsigned int i;
	166
	167	devc = sdi->priv;
	168
	169	if (devc->buffer_len < MEM_USAGE_BUFFER_SIZE) {
	170	devc->buffer[devc->buffer_len++] = c;
	171	} else {
	172	for (i = 1; i < MEM_USAGE_BUFFER_SIZE; i++)
	173	devc->buffer[i - 1] = devc->buffer[i];
	174	devc->buffer[MEM_USAGE_BUFFER_SIZE - 1] = c;
	175	}
	176
	177	if (devc->buffer_len == MEM_USAGE_BUFFER_SIZE && devc->buffer[0] == 0xd1
	178	&& devc->buffer[1] == 0x05 && devc->buffer[2] == 0x00
	179	&& devc->buffer[3] == 0x01 && devc->buffer[4] == 0xd2
	180	&& devc->buffer[MEM_USAGE_BUFFER_SIZE - 1] == 0x20) {
	181	devc->memory_block_usage = devc->buffer[5] << 8 \| devc->buffer[6];
	182	devc->memory_last_block_usage = devc->buffer[7];
	183	sr_warn("Memory usage: %d blocks of 256 bytes, 1 block of %d bytes",
	184	devc->memory_block_usage - 1, devc->memory_last_block_usage);
	185	devc->buffer_len = 0;
	186	devc->buffer_skip = 1;
	187	devc->memory_state = MEM_STATE_REQUEST_MEMORY_BLOCK;
	188	devc->memory_block_cursor = 0;
	189	devc->memory_block_counter = 0;
	190	}
	191	}
	192
	193	static void process_memory_byte(const struct sr_dev_inst *sdi, uint8_t c)
	194	{
	195	struct dev_context *devc;
	196	unsigned int i;
	197
	198	devc = sdi->priv;
	199
	200	if (devc->buffer_len < MEM_DATA_BUFFER_SIZE) {
	201	devc->buffer[devc->buffer_len++] = c;
	202	} else {
	203	for (i = 1; i < MEM_DATA_BUFFER_SIZE; i++)
	204	devc->buffer[i - 1] = devc->buffer[i];
	205	devc->buffer[MEM_DATA_BUFFER_SIZE - 1] = c;
	206	}
	207
	208	if (devc->buffer_skip == 0 \
	209	&& (devc->buffer[devc->buffer_len-2] & 0x7f) == 0x7f
	210	&& (devc->buffer[devc->buffer_len-1] & 0xf7) == 0xf7) {
	211	/* Recording session header bytes found, load next 7 bytes. */
	212	devc->buffer_skip = MEM_DATA_BUFFER_SIZE - 2;
	213	}
	214
	215	if (devc->buffer_skip == 0 && devc->buffer_len == MEM_DATA_BUFFER_SIZE
	216	&& (devc->buffer[0] & 0x7f) == 0x7f && (devc->buffer[1] & 0xf7) == 0xf7
217	&& devc->buffer[2] == 0x01 && devc->buffer[3] == 0x00) {
218	/* Print information about recording. */
219	sr_err("Recording dB(%X) %02x/%02x/%02x %02x:%02x:%02x ",
220	devc->buffer[4], devc->buffer[5], devc->buffer[6], devc->buffer[7],
221	devc->buffer[8] & 0x3f, devc->buffer[9], devc->buffer[10]);
222	/* Set dBA/dBC flag for recording. */
223	if (devc->buffer[4] == 0x0c) {
224	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_C;
225	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_A;
226	} else {
227	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_A;
228	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_C;
5a2c71cc	229	}
ae87e02f MG	230	send_data(sdi, -1.0); /* Signal switch of recording. */
	231	devc->buffer_skip = 2;
	232	}
	233
	234	if (devc->buffer_skip == 0) {
	235	process_memory_measurement(sdi);
	236	devc->buffer_skip = 1;
	237	} else {
	238	devc->buffer_skip -= 1;
	239	}
	240
	241	devc->memory_block_cursor++; /* uint8_t goes back to 0 after 255. */
	242	if (devc->memory_block_cursor == 0) {
	243	/* Current block is completed. */
	244	devc->memory_block_counter++;
	245	devc->memory_state = MEM_STATE_REQUEST_MEMORY_BLOCK;
5a2c71cc GH	246	}
	247	}
	248
	249	SR_PRIV int pce_322a_receive_data(int fd, int revents, void *cb_data)
	250	{
	251	const struct sr_dev_inst *sdi;
	252	struct dev_context *devc;
	253	struct sr_serial_dev_inst *serial;
	254	unsigned char c;
	255
	256	(void)fd;
	257
	258	if (!(sdi = cb_data))
	259	return TRUE;
	260
	261	if (!(devc = sdi->priv))
	262	return TRUE;
	263
	264	if (!(serial = sdi->conn))
	265	return TRUE;
	266
ae87e02f MG	267	if (devc->cur_data_source == DATA_SOURCE_MEMORY) {
	268	switch (devc->memory_state) {
	269	case MEM_STATE_REQUEST_MEMORY_USAGE:
	270	/* At init, disconnect and request the memory status. */
	271	sr_warn("Requesting memory usage.");
	272	pce_322a_disconnect(sdi);
	273	devc->memory_state = MEM_STATE_GET_MEMORY_USAGE;
	274	devc->memory_block_usage = 0;
	275	devc->memory_last_block_usage = 0;
	276	devc->memory_block_counter = 0;
	277	devc->memory_block_cursor = 0;
	278	pce_322a_memory_status(sdi);
	279	break;
	280	case MEM_STATE_GET_MEMORY_USAGE:
	281	/* Listen for memory usage answer. */
	282	if (revents == G_IO_IN) {
	283	if (serial_read_nonblocking(serial, &c, 1) != 1)
	284	return TRUE;
	285	process_usage_byte(sdi, c);
	286	}
	287	break;
	288	case MEM_STATE_REQUEST_MEMORY_BLOCK:
	289	/* When cursor is 0, request next memory block. */
	290	if (devc->memory_block_counter <= devc->memory_block_usage) {
	291	sr_warn("Requesting memory block %d.", devc->memory_block_counter);
	292	pce_322a_memory_block(sdi, devc->memory_block_counter);
	293	devc->memory_state = MEM_STATE_GET_MEMORY_BLOCK;
	294	} else {
	295	sr_warn("Exhausted memory blocks.");
	296	return FALSE;
	297	}
	298	break;
	299	case MEM_STATE_GET_MEMORY_BLOCK:
	300	/* Stop after reading last byte of last block. */
	301	if (devc->memory_block_counter >= devc->memory_block_usage
	302	&& devc->memory_block_cursor >= devc->memory_last_block_usage) {
	303	sr_warn("Done reading memory (%d bytes).",
	304	256 * (devc->memory_block_counter - 1)
	305	+ devc->memory_block_cursor);
	306	return FALSE;
	307	}
	308	/* Listen for memory data. */
	309	if (revents == G_IO_IN) {
	310	if (serial_read_nonblocking(serial, &c, 1) != 1)
	311	return TRUE;
	312	process_memory_byte(sdi, c);
	313	}
	314	break;
	315	}
	316	} else {
	317	/* Listen for live data. */
	318	if (revents == G_IO_IN) {
	319	if (serial_read_nonblocking(serial, &c, 1) != 1)
	320	return TRUE;
	321	process_byte(sdi, c);
	322	}
5a2c71cc GH	323	}
	324
	325	return TRUE;
	326	}
	327
	328	SR_PRIV int pce_322a_connect(const struct sr_dev_inst *sdi)
	329	{
	330	return send_command(sdi, CMD_CONNECT);
	331	}
	332
	333	SR_PRIV int pce_322a_disconnect(const struct sr_dev_inst *sdi)
	334	{
	335	return send_command(sdi, CMD_DISCONNECT);
	336	}
	337
ae87e02f MG	338	SR_PRIV int pce_322a_memory_status(const struct sr_dev_inst *sdi)
	339	{
	340	return send_command(sdi, CMD_MEMORY_STATUS);
	341	}
	342
	343	SR_PRIV int pce_322a_memory_clear(const struct sr_dev_inst *sdi)
	344	{
	345	return send_command(sdi, CMD_MEMORY_CLEAR);
	346	}
	347
	348	SR_PRIV int pce_322a_memory_block(const struct sr_dev_inst *sdi, uint16_t memblk)
	349	{
	350	uint8_t buf0 = memblk;
	351	uint8_t buf1 = memblk >> 8;
	352	uint32_t command = CMD_MEMORY_TRANSFER << 16 \| buf0 << 8 \| buf1;
	353	return send_long_command(sdi, command);
	354	}
	355
5a2c71cc GH	356	SR_PRIV uint64_t pce_322a_weight_freq_get(const struct sr_dev_inst *sdi)
	357	{
	358	struct dev_context *devc;
	359
	360	devc = sdi->priv;
	361
	362	return devc->cur_mqflags & (SR_MQFLAG_SPL_FREQ_WEIGHT_A \| SR_MQFLAG_SPL_FREQ_WEIGHT_C);
	363	}
	364
	365	SR_PRIV int pce_322a_weight_freq_set(const struct sr_dev_inst *sdi, uint64_t freqw)
	366	{
	367	struct dev_context *devc;
	368
	369	devc = sdi->priv;
	370
	371	if (devc->cur_mqflags & freqw)
	372	return SR_OK;
	373
	374	return send_command(sdi, CMD_TOGGLE_WEIGHT_FREQ);
	375	}
	376
	377	SR_PRIV uint64_t pce_322a_weight_time_get(const struct sr_dev_inst *sdi)
	378	{
	379	struct dev_context *devc;
	380
	381	devc = sdi->priv;
	382
	383	return devc->cur_mqflags & (SR_MQFLAG_SPL_TIME_WEIGHT_F \| SR_MQFLAG_SPL_TIME_WEIGHT_S);
	384	}
	385
	386	SR_PRIV int pce_322a_weight_time_set(const struct sr_dev_inst *sdi, uint64_t timew)
	387	{
	388	struct dev_context *devc;
	389
	390	devc = sdi->priv;
	391
	392	if (devc->cur_mqflags & timew)
	393	return SR_OK;
	394
	395	return send_command(sdi, CMD_TOGGLE_WEIGHT_TIME);
	396	}
	397
	398	SR_PRIV int pce_322a_meas_range_get(const struct sr_dev_inst *sdi,
	399	uint64_t low, uint64_t high)
	400	{
	401	struct dev_context *devc;
	402
	403	devc = sdi->priv;
	404
	405	switch (devc->cur_meas_range) {
	406	case MEAS_RANGE_30_130:
	407	*low = 30;
	408	*high = 130;
	409	break;
	410	case MEAS_RANGE_30_80:
	411	*low = 30;
	412	*high = 80;
	413	break;
	414	case MEAS_RANGE_50_100:
	415	*low = 50;
	416	*high = 100;
	417	break;
	418	case MEAS_RANGE_80_130:
	419	*low = 80;
420	*high = 130;
421	break;
422	default:
423	return SR_ERR;
424	}
425
426	return SR_OK;
427	}
428
429	SR_PRIV int pce_322a_meas_range_set(const struct sr_dev_inst *sdi,
430	uint64_t low, uint64_t high)
431	{
432	struct dev_context *devc;
433	uint8_t range;
434	int ret = SR_OK;
435
436	devc = sdi->priv;
437
438	if (low == 30 && high == 130)
439	range = MEAS_RANGE_30_130;
440	else if (low == 30 && high == 80)
441	range = MEAS_RANGE_30_80;
442	else if (low == 50 && high == 100)
443	range = MEAS_RANGE_50_100;
444	else if (low == 80 && high == 130)
445	range = MEAS_RANGE_80_130;
446	else
447	return SR_ERR;
448
449	while (range != devc->cur_meas_range) {
450	ret = send_command(sdi, CMD_TOGGLE_MEAS_RANGE);
451	if (ret != SR_OK)
452	break;
453	range = (range - 1) & 3;
454	}
455
456	return ret;
457	}
458
459	SR_PRIV int pce_322a_power_off(const struct sr_dev_inst *sdi)
460	{
461	return send_command(sdi, CMD_POWER_OFF);
462	}