+++ /dev/null
-/*
- * This file is part of the libsigrok 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 <string.h>
-#include <glib.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-#include "protocol.h"
-
-/* States */
-enum {
- SEND_INIT,
- GET_INIT_REPLY,
- SEND_PACKET_REQUEST,
- GET_PACKET,
-};
-
-static void parse_packet(const uint8_t *buf, float *floatval,
- struct sr_datafeed_analog *analog)
-{
- gboolean is_a, is_fast;
- uint16_t intval;
- uint8_t level = 0, level_bits;
-
- /* Byte 0 [7:7]: 0 = A, 1 = C */
- is_a = ((buf[0] & (1 << 7)) == 0);
-
- /* Byte 0 [6:6]: Unknown/unused? */
-
- /* Byte 0 [5:4]: Level (00 = 40, 01 = 60, 10 = 80, 11 = 100) */
- level_bits = (buf[0] >> 4) & 0x03;
- if (level_bits == 0)
- level = 40;
- else if (level_bits == 1)
- level = 60;
- else if (level_bits == 2)
- level = 80;
- else if (level_bits == 3)
- level = 100;
-
- /* Byte 0 [3:3]: 0 = fast, 1 = slow */
- is_fast = ((buf[0] & (1 << 3)) == 0);
-
- /* Byte 0 [2:0]: value[10..8] */
- /* Byte 1 [7:0]: value[7..0] */
- intval = (buf[0] & 0x7) << 8;
- intval |= buf[1];
-
- *floatval = (float)intval;
-
- /* The value on the display always has one digit after the comma. */
- *floatval /= 10;
-
- analog->mq = SR_MQ_SOUND_PRESSURE_LEVEL;
- analog->unit = SR_UNIT_DECIBEL_SPL;
-
- if (is_a)
- analog->mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_A;
- else
- analog->mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_C;
-
- if (is_fast)
- analog->mqflags |= SR_MQFLAG_SPL_TIME_WEIGHT_F;
- else
- analog->mqflags |= SR_MQFLAG_SPL_TIME_WEIGHT_S;
-
- /* TODO: How to handle level? */
- (void)level;
-}
-
-static void decode_packet(struct sr_dev_inst *sdi)
-{
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog;
- struct dev_context *devc;
- float floatval;
-
- devc = sdi->priv;
- memset(&analog, 0, sizeof(struct sr_datafeed_analog));
-
- parse_packet(devc->buf, &floatval, &analog);
-
- /* Send a sample packet with one analog value. */
- analog.channels = sdi->channels;
- analog.num_samples = 1;
- analog.data = &floatval;
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog;
- sr_session_send(devc->cb_data, &packet);
-
- devc->num_samples++;
-}
-
-int tondaj_sl_814_receive_data(int fd, int revents, void *cb_data)
-{
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- struct sr_serial_dev_inst *serial;
- uint8_t buf[3];
- int ret;
-
- (void)fd;
- (void)revents;
-
- sdi = cb_data;
- serial = sdi->conn;
- devc = sdi->priv;
-
- /* TODO: Parts of this code need to be improved later. */
-
- /* State machine. */
- if (devc->state == SEND_INIT) {
- /* On the first run, send the "init" command. */
- buf[0] = 0x10;
- buf[1] = 0x04;
- buf[2] = 0x0d;
- sr_spew("Sending init command: %02x %02x %02x.",
- buf[0], buf[1], buf[2]);
- if ((ret = serial_write(serial, buf, 3)) < 0) {
- sr_err("Error sending init command: %d.", ret);
- return FALSE;
- }
- devc->state = GET_INIT_REPLY;
- } else if (devc->state == GET_INIT_REPLY) {
- /* If we just sent the "init" command, get its reply. */
- if ((ret = serial_read(serial, buf, 2)) < 0) {
- sr_err("Error reading init reply: %d.", ret);
- return FALSE;
- }
- sr_spew("Received init reply: %02x %02x.", buf[0], buf[1]);
- /* Expected reply: 0x05 0x0d */
- if (buf[0] != 0x05 || buf[1] != 0x0d) {
- sr_err("Received incorrect init reply, retrying.");
- devc->state = SEND_INIT;
- return TRUE;
- }
- devc->state = SEND_PACKET_REQUEST;
- } else if (devc->state == SEND_PACKET_REQUEST) {
- /* Request a packet (send 0x30 ZZ 0x0d). */
- buf[0] = 0x30;
- buf[1] = 0x00; /* ZZ */
- buf[2] = 0x0d;
- sr_spew("Sending data request command: %02x %02x %02x.",
- buf[0], buf[1], buf[2]);
- if ((ret = serial_write(serial, buf, 3)) < 0) {
- sr_err("Error sending request command: %d.", ret);
- return FALSE;
- }
- devc->buflen = 0;
- devc->state = GET_PACKET;
- } else if (devc->state == GET_PACKET) {
- /* Read a packet from the device. */
- ret = serial_read(serial, devc->buf + devc->buflen,
- 4 - devc->buflen);
- if (ret < 0) {
- sr_err("Error reading packet: %d.", ret);
- return TRUE;
- }
-
- devc->buflen += ret;
-
- /* Didn't receive all 4 bytes, yet. */
- if (devc->buflen != 4)
- return TRUE;
-
- sr_spew("Received packet: %02x %02x %02x %02x.", devc->buf[0],
- devc->buf[1], devc->buf[2], devc->buf[3]);
-
- /* Expected reply: AA BB ZZ+1 0x0d */
- if (devc->buf[2] != 0x01 || devc->buf[3] != 0x0d) {
- sr_err("Received incorrect request reply, retrying.");
- devc->state = SEND_PACKET_REQUEST;
- return TRUE;
- }
-
- decode_packet(sdi);
-
- devc->state = SEND_PACKET_REQUEST;
- } else {
- sr_err("Invalid state: %d.", devc->state);
- return FALSE;
- }
-
- /* Stop acquisition if we acquired enough samples. */
- if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
- sr_info("Requested number of samples reached.");
- sdi->driver->dev_acquisition_stop(sdi, cb_data);
- }
-
- return TRUE;
-}
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