+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 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 <stdlib.h>
-#include <glib.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-#include "protocol.h"
-#include <errno.h>
-#include <string.h>
-
-static void process_packet(const struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog;
- GString *dbg;
- float fvalue;
- int checksum, mode, i;
-
- devc = sdi->priv;
- if (sr_log_loglevel_get() >= SR_LOG_SPEW) {
- dbg = g_string_sized_new(128);
- g_string_printf(dbg, "received packet:");
- for (i = 0; i < 10; i++)
- g_string_append_printf(dbg, " %.2x", (devc->buf)[i]);
- sr_spew("%s", dbg->str);
- g_string_free(dbg, TRUE);
- }
-
- if (devc->buf[0] != 0x08 || devc->buf[1] != 0x04) {
- sr_dbg("invalid packet header.");
- return;
- }
-
- if (devc->buf[8] != 0x01) {
- sr_dbg("invalid measurement.");
- return;
- }
-
- checksum = 0;
- for (i = 0; i < 9; i++)
- checksum += devc->buf[i];
- if ((checksum & 0xff) != devc->buf[9]) {
- sr_dbg("invalid packet checksum.");
- return;
- }
-
- fvalue = 0.0;
- for (i = 3; i < 8; i++) {
- if (devc->buf[i] > 0x09)
- continue;
- fvalue *= 10;
- fvalue += devc->buf[i];
- }
- fvalue /= 10;
-
- memset(&analog, 0, sizeof(struct sr_datafeed_analog));
- analog.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
- analog.unit = SR_UNIT_DECIBEL_SPL;
- analog.channels = sdi->channels;
- analog.num_samples = 1;
- analog.data = &fvalue;
-
- /* High nibble should only have 0x01 or 0x02. */
- mode = (devc->buf[2] >> 4) & 0x0f;
- if (mode == 0x02)
- analog.mqflags |= SR_MQFLAG_HOLD;
- else if (mode != 0x01) {
- sr_dbg("unknown measurement mode 0x%.2x", mode);
- return;
- }
-
- /* Low nibble has 14 combinations of direct/long-term average,
- * time scale of that average, frequency weighting, and time
- * weighting. */
- mode = devc->buf[2] & 0x0f;
- switch (mode) {
- case 0x0:
- analog.mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_A \
- | SR_MQFLAG_SPL_TIME_WEIGHT_F;
- break;
- case 0x1:
- analog.mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_A \
- | SR_MQFLAG_SPL_TIME_WEIGHT_S;
- break;
- case 0x2:
- analog.mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_C \
- | SR_MQFLAG_SPL_TIME_WEIGHT_F;
- break;
- case 0x3:
- analog.mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_C \
- | SR_MQFLAG_SPL_TIME_WEIGHT_S;
- break;
- case 0x4:
- analog.mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_FLAT \
- | SR_MQFLAG_SPL_TIME_WEIGHT_F;
- break;
- case 0x5:
- analog.mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_FLAT \
- | SR_MQFLAG_SPL_TIME_WEIGHT_S;
- break;
- case 0x6:
- analog.mqflags |= SR_MQFLAG_SPL_PCT_OVER_ALARM \
- | SR_MQFLAG_SPL_FREQ_WEIGHT_A \
- | SR_MQFLAG_SPL_TIME_WEIGHT_F;
- break;
- case 0x7:
- analog.mqflags |= SR_MQFLAG_SPL_PCT_OVER_ALARM \
- | SR_MQFLAG_SPL_FREQ_WEIGHT_A \
- | SR_MQFLAG_SPL_TIME_WEIGHT_S;
- break;
- case 0x8:
- /* 10-second mean, but we don't have MQ flags to express it. */
- analog.mqflags |= SR_MQFLAG_SPL_LAT \
- | SR_MQFLAG_SPL_FREQ_WEIGHT_A \
- | SR_MQFLAG_SPL_TIME_WEIGHT_F;
- break;
- case 0x9:
- /* Mean over a time period between 11 seconds and 24 hours.
- * Which is so silly that there's no point in expressing
- * either this or the previous case. */
- analog.mqflags |= SR_MQFLAG_SPL_LAT \
- | SR_MQFLAG_SPL_FREQ_WEIGHT_A \
- | SR_MQFLAG_SPL_TIME_WEIGHT_F;
- break;
- case 0xa:
- /* 10-second mean. */
- analog.mqflags |= SR_MQFLAG_SPL_LAT \
- | SR_MQFLAG_SPL_FREQ_WEIGHT_A \
- | SR_MQFLAG_SPL_TIME_WEIGHT_S;
- break;
- case 0xb:
- /* Mean over a time period between 11 seconds and 24 hours. */
- analog.mqflags |= SR_MQFLAG_SPL_LAT \
- | SR_MQFLAG_SPL_FREQ_WEIGHT_A \
- | SR_MQFLAG_SPL_TIME_WEIGHT_S;
- break;
- case 0xc:
- /* Internal calibration on 1kHz sine at 94dB, not useful
- * to anything but the device. */
- analog.mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_FLAT;
- break;
- case 0xd:
- /* Internal calibration on 1kHz sine at 94dB, not useful
- * to anything but the device. */
- analog.mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_FLAT;
- break;
- default:
- sr_dbg("unknown configuration 0x%.2x", mode);
- return;
- break;
- }
-
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog;
- sr_session_send(devc->cb_data, &packet);
-
- devc->num_samples++;
-
-}
-
-SR_PRIV int colead_slm_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;
- int len;
- char buf[128];
-
- (void)fd;
-
- if (!(sdi = cb_data))
- return TRUE;
-
- if (!(devc = sdi->priv))
- return TRUE;
-
- if (revents != G_IO_IN)
- /* Timeout event. */
- return TRUE;
-
- serial = sdi->conn;
- if (devc->state == IDLE) {
- if (serial_read(serial, buf, 128) != 1 || buf[0] != 0x10)
- /* Nothing there, or caught the tail end of a previous packet,
- * or some garbage. Unless it's a single "data ready" byte,
- * we don't want it. */
- return TRUE;
- /* Got 0x10, "measurement ready". */
- if (serial_write(serial, "\x20", 1) == -1)
- sr_err("unable to send command: %s", strerror(errno));
- else {
- devc->state = COMMAND_SENT;
- devc->buflen = 0;
- }
- } else {
- len = serial_read(serial, devc->buf + devc->buflen,
- 10 - devc->buflen);
- if (len < 1)
- return TRUE;
- devc->buflen += len;
- if (devc->buflen > 10) {
- sr_dbg("buffer overrun");
- devc->state = IDLE;
- return TRUE;
- }
- if (devc->buflen == 10) {
- /* If we got here, we're sure the device sent a "data ready"
- * notification, we asked for data, and got it. */
- process_packet(sdi);
- devc->state = IDLE;
- }
- }
-
- return TRUE;
-}
projects / libsigrok.git / blobdiff