[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 <string.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;

	devc = sdi->priv;

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

	devc = sdi->priv;

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

	devc = sdi->priv;

	if (devc->buffer_len < MEM_DATA_BUFFER_SIZE) {
		devc->buffer[devc->buffer_len++] = c;
	} else {
		memmove(devc->buffer, devc->buffer + 1, MEM_DATA_BUFFER_SIZE - 1);
		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>
093b8ff4	22	#include <string.h>
5a2c71cc GH	23	#include "protocol.h"
	24
	25	static int send_command(const struct sr_dev_inst *sdi, uint16_t command)
	26	{
	27	struct sr_serial_dev_inst *serial;
	28	uint8_t buffer[2];
	29
	30	buffer[0] = command >> 8;
	31	buffer[1] = command;
	32
	33	if (!(serial = sdi->conn))
	34	return SR_ERR;
	35
379e95c5	36	return serial_write_blocking(serial, (const void *)buffer, 2, 0);
5a2c71cc GH	37	}
5a2c71cc GH	38
ae87e02f MG	39	static int send_long_command(const struct sr_dev_inst *sdi, uint32_t command)
	40	{
	41	struct sr_serial_dev_inst *serial;
	42	uint8_t buffer[4];
	43
	44	buffer[0] = command >> 24;
	45	buffer[1] = command >> 16;
	46	buffer[2] = command >> 8;
	47	buffer[3] = command;
	48
	49	if (!(serial = sdi->conn))
	50	return SR_ERR;
	51
379e95c5	52	return serial_write_blocking(serial, (const void *)buffer, 4, 0);
ae87e02f MG	53	}
ae87e02f MG	54
5a2c71cc GH	55	static void send_data(const struct sr_dev_inst *sdi, float sample)
	56	{
	57	struct dev_context *devc;
	58	struct sr_datafeed_packet packet;
	59	struct sr_datafeed_analog analog;
	60	struct sr_analog_encoding encoding;
	61	struct sr_analog_meaning meaning;
	62	struct sr_analog_spec spec;
	63
	64	devc = sdi->priv;
	65
	66	sr_analog_init(&analog, &encoding, &meaning, &spec, 1);
	67	meaning.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
	68	meaning.mqflags = devc->cur_mqflags;
	69	meaning.unit = SR_UNIT_DECIBEL_SPL;
	70	meaning.channels = sdi->channels;
	71	analog.num_samples = 1;
	72	analog.data = &sample;
	73	packet.type = SR_DF_ANALOG;
	74	packet.payload = &analog;
	75	sr_session_send(sdi, &packet);
	76
	77	devc->num_samples++;
ae87e02f MG	78	/* Limiting number of samples is only supported for live data. */
ae87e02f MG	79	if (devc->cur_data_source == DATA_SOURCE_LIVE && devc->limit_samples && devc->num_samples >= devc->limit_samples)
d2f7c417	80	sr_dev_acquisition_stop((struct sr_dev_inst *)sdi);
5a2c71cc GH	81	}
	82
	83	static void process_measurement(const struct sr_dev_inst *sdi)
	84	{
	85	struct dev_context *devc;
	86	unsigned short value;
	87
	88	devc = sdi->priv;
	89
	90	if (devc->buffer[3] & (1 << 0)) {
	91	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_C;
	92	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_A;
	93	} else {
	94	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_A;
	95	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_C;
	96	}
	97
	98	if (devc->buffer[3] & (1 << 1)) {
	99	devc->cur_mqflags \|= SR_MQFLAG_SPL_TIME_WEIGHT_S;
	100	devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_F;
	101	} else {
	102	devc->cur_mqflags \|= SR_MQFLAG_SPL_TIME_WEIGHT_F;
	103	devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_S;
	104	}
	105
	106	devc->cur_meas_range = devc->buffer[4] & 3;
	107
	108	if (devc->buffer[4] & (1 << 2)) {
	109	devc->cur_mqflags \|= SR_MQFLAG_MAX;
	110	devc->cur_mqflags &= ~SR_MQFLAG_MIN;
	111	} else if (devc->buffer[4] & (1 << 3)) {
	112	devc->cur_mqflags \|= SR_MQFLAG_MIN;
	113	devc->cur_mqflags &= ~SR_MQFLAG_MAX;
	114	} else {
	115	devc->cur_mqflags &= ~SR_MQFLAG_MIN;
	116	devc->cur_mqflags &= ~SR_MQFLAG_MAX;
	117	}
	118
	119	value = devc->buffer[1] << 8 \| devc->buffer[2];
	120	send_data(sdi, value / 10.0);
	121	}
	122
ae87e02f MG	123	static void process_memory_measurement(const struct sr_dev_inst *sdi)
	124	{
	125	struct dev_context *devc;
	126	uint16_t value;
	127
	128	devc = sdi->priv;
	129	value = devc->buffer[devc->buffer_len - 1] << 8;
	130	value \|= devc->buffer[devc->buffer_len - 2];
	131
	132	send_data(sdi, value / 10.0);
	133	}
	134
5a2c71cc GH	135	static void process_byte(const struct sr_dev_inst *sdi, const unsigned char c)
	136	{
	137	struct dev_context *devc;
5a2c71cc GH	138
	139	devc = sdi->priv;
	140
	141	if (devc->buffer_len < BUFFER_SIZE) {
	142	devc->buffer[devc->buffer_len++] = c;
	143	} else {
093b8ff4	144	memmove(devc->buffer, devc->buffer + 1, BUFFER_SIZE - 1);
5a2c71cc	145	devc->buffer[BUFFER_SIZE - 1] = c;
ae87e02f MG	146	}
	147
	148	if (devc->buffer_len == BUFFER_SIZE && devc->buffer[0] == 0x7f
	149	&& devc->buffer[BUFFER_SIZE - 1] == 0x00) {
	150	process_measurement(sdi);
	151	devc->buffer_len = 0;
	152	}
	153	}
	154
	155	static void process_usage_byte(const struct sr_dev_inst *sdi, uint8_t c)
	156	{
	157	struct dev_context *devc;
ae87e02f MG	158
	159	devc = sdi->priv;
	160
	161	if (devc->buffer_len < MEM_USAGE_BUFFER_SIZE) {
	162	devc->buffer[devc->buffer_len++] = c;
	163	} else {
093b8ff4	164	memmove(devc->buffer, devc->buffer + 1, MEM_USAGE_BUFFER_SIZE - 1);
ae87e02f MG	165	devc->buffer[MEM_USAGE_BUFFER_SIZE - 1] = c;
	166	}
	167
	168	if (devc->buffer_len == MEM_USAGE_BUFFER_SIZE && devc->buffer[0] == 0xd1
	169	&& devc->buffer[1] == 0x05 && devc->buffer[2] == 0x00
	170	&& devc->buffer[3] == 0x01 && devc->buffer[4] == 0xd2
	171	&& devc->buffer[MEM_USAGE_BUFFER_SIZE - 1] == 0x20) {
	172	devc->memory_block_usage = devc->buffer[5] << 8 \| devc->buffer[6];
	173	devc->memory_last_block_usage = devc->buffer[7];
	174	sr_warn("Memory usage: %d blocks of 256 bytes, 1 block of %d bytes",
	175	devc->memory_block_usage - 1, devc->memory_last_block_usage);
	176	devc->buffer_len = 0;
	177	devc->buffer_skip = 1;
	178	devc->memory_state = MEM_STATE_REQUEST_MEMORY_BLOCK;
	179	devc->memory_block_cursor = 0;
	180	devc->memory_block_counter = 0;
	181	}
	182	}
	183
	184	static void process_memory_byte(const struct sr_dev_inst *sdi, uint8_t c)
	185	{
	186	struct dev_context *devc;
ae87e02f MG	187
	188	devc = sdi->priv;
	189
	190	if (devc->buffer_len < MEM_DATA_BUFFER_SIZE) {
	191	devc->buffer[devc->buffer_len++] = c;
	192	} else {
093b8ff4	193	memmove(devc->buffer, devc->buffer + 1, MEM_DATA_BUFFER_SIZE - 1);
ae87e02f MG	194	devc->buffer[MEM_DATA_BUFFER_SIZE - 1] = c;
	195	}
	196
	197	if (devc->buffer_skip == 0 \
	198	&& (devc->buffer[devc->buffer_len-2] & 0x7f) == 0x7f
	199	&& (devc->buffer[devc->buffer_len-1] & 0xf7) == 0xf7) {
	200	/* Recording session header bytes found, load next 7 bytes. */
	201	devc->buffer_skip = MEM_DATA_BUFFER_SIZE - 2;
	202	}
	203
	204	if (devc->buffer_skip == 0 && devc->buffer_len == MEM_DATA_BUFFER_SIZE
	205	&& (devc->buffer[0] & 0x7f) == 0x7f && (devc->buffer[1] & 0xf7) == 0xf7
	206	&& devc->buffer[2] == 0x01 && devc->buffer[3] == 0x00) {
	207	/* Print information about recording. */
	208	sr_err("Recording dB(%X) %02x/%02x/%02x %02x:%02x:%02x ",
	209	devc->buffer[4], devc->buffer[5], devc->buffer[6], devc->buffer[7],
	210	devc->buffer[8] & 0x3f, devc->buffer[9], devc->buffer[10]);
	211	/* Set dBA/dBC flag for recording. */
	212	if (devc->buffer[4] == 0x0c) {
	213	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_C;
	214	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_A;
	215	} else {
	216	devc->cur_mqflags \|= SR_MQFLAG_SPL_FREQ_WEIGHT_A;
	217	devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_C;
5a2c71cc	218	}
ae87e02f MG	219	send_data(sdi, -1.0); /* Signal switch of recording. */
	220	devc->buffer_skip = 2;
	221	}
	222
	223	if (devc->buffer_skip == 0) {
	224	process_memory_measurement(sdi);
	225	devc->buffer_skip = 1;
	226	} else {
	227	devc->buffer_skip -= 1;
	228	}
	229
	230	devc->memory_block_cursor++; /* uint8_t goes back to 0 after 255. */
	231	if (devc->memory_block_cursor == 0) {
	232	/* Current block is completed. */
	233	devc->memory_block_counter++;
	234	devc->memory_state = MEM_STATE_REQUEST_MEMORY_BLOCK;
5a2c71cc GH	235	}
	236	}
	237
	238	SR_PRIV int pce_322a_receive_data(int fd, int revents, void *cb_data)
	239	{
	240	const struct sr_dev_inst *sdi;
	241	struct dev_context *devc;
	242	struct sr_serial_dev_inst *serial;
	243	unsigned char c;
	244
	245	(void)fd;
	246
	247	if (!(sdi = cb_data))
	248	return TRUE;
	249
	250	if (!(devc = sdi->priv))
	251	return TRUE;
	252
	253	if (!(serial = sdi->conn))
	254	return TRUE;
	255
ae87e02f MG	256	if (devc->cur_data_source == DATA_SOURCE_MEMORY) {
	257	switch (devc->memory_state) {
	258	case MEM_STATE_REQUEST_MEMORY_USAGE:
	259	/* At init, disconnect and request the memory status. */
	260	sr_warn("Requesting memory usage.");
	261	pce_322a_disconnect(sdi);
	262	devc->memory_state = MEM_STATE_GET_MEMORY_USAGE;
	263	devc->memory_block_usage = 0;
	264	devc->memory_last_block_usage = 0;
	265	devc->memory_block_counter = 0;
	266	devc->memory_block_cursor = 0;
	267	pce_322a_memory_status(sdi);
	268	break;
	269	case MEM_STATE_GET_MEMORY_USAGE:
	270	/* Listen for memory usage answer. */
	271	if (revents == G_IO_IN) {
	272	if (serial_read_nonblocking(serial, &c, 1) != 1)
	273	return TRUE;
	274	process_usage_byte(sdi, c);
	275	}
	276	break;
	277	case MEM_STATE_REQUEST_MEMORY_BLOCK:
	278	/* When cursor is 0, request next memory block. */
	279	if (devc->memory_block_counter <= devc->memory_block_usage) {
	280	sr_warn("Requesting memory block %d.", devc->memory_block_counter);
	281	pce_322a_memory_block(sdi, devc->memory_block_counter);
	282	devc->memory_state = MEM_STATE_GET_MEMORY_BLOCK;
	283	} else {
	284	sr_warn("Exhausted memory blocks.");
	285	return FALSE;
	286	}
	287	break;
	288	case MEM_STATE_GET_MEMORY_BLOCK:
	289	/* Stop after reading last byte of last block. */
	290	if (devc->memory_block_counter >= devc->memory_block_usage
	291	&& devc->memory_block_cursor >= devc->memory_last_block_usage) {
	292	sr_warn("Done reading memory (%d bytes).",
	293	256 * (devc->memory_block_counter - 1)
	294	+ devc->memory_block_cursor);
	295	return FALSE;
	296	}
	297	/* Listen for memory data. */
	298	if (revents == G_IO_IN) {
	299	if (serial_read_nonblocking(serial, &c, 1) != 1)
	300	return TRUE;
	301	process_memory_byte(sdi, c);
	302	}
	303	break;
	304	}
	305	} else {
	306	/* Listen for live data. */
	307	if (revents == G_IO_IN) {
	308	if (serial_read_nonblocking(serial, &c, 1) != 1)
	309	return TRUE;
	310	process_byte(sdi, c);
	311	}
5a2c71cc GH	312	}
	313
	314	return TRUE;
	315	}
	316
	317	SR_PRIV int pce_322a_connect(const struct sr_dev_inst *sdi)
	318	{
	319	return send_command(sdi, CMD_CONNECT);
	320	}
	321
	322	SR_PRIV int pce_322a_disconnect(const struct sr_dev_inst *sdi)
	323	{
	324	return send_command(sdi, CMD_DISCONNECT);
	325	}
	326
ae87e02f MG	327	SR_PRIV int pce_322a_memory_status(const struct sr_dev_inst *sdi)
	328	{
	329	return send_command(sdi, CMD_MEMORY_STATUS);
	330	}
	331
	332	SR_PRIV int pce_322a_memory_clear(const struct sr_dev_inst *sdi)
	333	{
	334	return send_command(sdi, CMD_MEMORY_CLEAR);
	335	}
	336
	337	SR_PRIV int pce_322a_memory_block(const struct sr_dev_inst *sdi, uint16_t memblk)
	338	{
	339	uint8_t buf0 = memblk;
	340	uint8_t buf1 = memblk >> 8;
	341	uint32_t command = CMD_MEMORY_TRANSFER << 16 \| buf0 << 8 \| buf1;
	342	return send_long_command(sdi, command);
	343	}
	344
5a2c71cc GH	345	SR_PRIV uint64_t pce_322a_weight_freq_get(const struct sr_dev_inst *sdi)
	346	{
	347	struct dev_context *devc;
	348
	349	devc = sdi->priv;
	350
	351	return devc->cur_mqflags & (SR_MQFLAG_SPL_FREQ_WEIGHT_A \| SR_MQFLAG_SPL_FREQ_WEIGHT_C);
	352	}
	353
	354	SR_PRIV int pce_322a_weight_freq_set(const struct sr_dev_inst *sdi, uint64_t freqw)
	355	{
	356	struct dev_context *devc;
	357
	358	devc = sdi->priv;
	359
	360	if (devc->cur_mqflags & freqw)
	361	return SR_OK;
	362
	363	return send_command(sdi, CMD_TOGGLE_WEIGHT_FREQ);
	364	}
	365
	366	SR_PRIV uint64_t pce_322a_weight_time_get(const struct sr_dev_inst *sdi)
	367	{
	368	struct dev_context *devc;
	369
	370	devc = sdi->priv;
	371
	372	return devc->cur_mqflags & (SR_MQFLAG_SPL_TIME_WEIGHT_F \| SR_MQFLAG_SPL_TIME_WEIGHT_S);
	373	}
	374
	375	SR_PRIV int pce_322a_weight_time_set(const struct sr_dev_inst *sdi, uint64_t timew)
	376	{
	377	struct dev_context *devc;
	378
	379	devc = sdi->priv;
	380
	381	if (devc->cur_mqflags & timew)
	382	return SR_OK;
	383
	384	return send_command(sdi, CMD_TOGGLE_WEIGHT_TIME);
	385	}
	386
	387	SR_PRIV int pce_322a_meas_range_get(const struct sr_dev_inst *sdi,
	388	uint64_t low, uint64_t high)
	389	{
	390	struct dev_context *devc;
	391
	392	devc = sdi->priv;
	393
	394	switch (devc->cur_meas_range) {
	395	case MEAS_RANGE_30_130:
	396	*low = 30;
	397	*high = 130;
	398	break;
	399	case MEAS_RANGE_30_80:
	400	*low = 30;
	401	*high = 80;
	402	break;
	403	case MEAS_RANGE_50_100:
	404	*low = 50;
	405	*high = 100;
	406	break;
	407	case MEAS_RANGE_80_130:
	408	*low = 80;
409	*high = 130;
410	break;
411	default:
412	return SR_ERR;
413	}
414
415	return SR_OK;
416	}
417
418	SR_PRIV int pce_322a_meas_range_set(const struct sr_dev_inst *sdi,
419	uint64_t low, uint64_t high)
420	{
421	struct dev_context *devc;
422	uint8_t range;
423	int ret = SR_OK;
424
425	devc = sdi->priv;
426
427	if (low == 30 && high == 130)
428	range = MEAS_RANGE_30_130;
429	else if (low == 30 && high == 80)
430	range = MEAS_RANGE_30_80;
431	else if (low == 50 && high == 100)
432	range = MEAS_RANGE_50_100;
433	else if (low == 80 && high == 130)
434	range = MEAS_RANGE_80_130;
435	else
436	return SR_ERR;
437
438	while (range != devc->cur_meas_range) {
439	ret = send_command(sdi, CMD_TOGGLE_MEAS_RANGE);
440	if (ret != SR_OK)
441	break;
442	range = (range - 1) & 3;
443	}
444
445	return ret;
446	}
447
448	SR_PRIV int pce_322a_power_off(const struct sr_dev_inst *sdi)
449	{
450	return send_command(sdi, CMD_POWER_OFF);
451	}