+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2014 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 <string.h>
-#include "protocol.h"
-
-SR_PRIV int testo_set_serial_params(struct sr_usb_dev_inst *usb)
-{
- int ret;
-
- if ((ret = libusb_control_transfer(usb->devhdl, 0x40, FTDI_SET_BAUDRATE,
- FTDI_BAUDRATE_115200, FTDI_INDEX, NULL, 0, 10)) < 0) {
- sr_err("Failed to set baudrate: %s", libusb_error_name(ret));
- return SR_ERR;
- }
-
- if ((ret = libusb_control_transfer(usb->devhdl, 0x40, FTDI_SET_PARAMS,
- FTDI_PARAMS_8N1, FTDI_INDEX, NULL, 0, 10)) < 0) {
- sr_err("Failed to set comm parameters: %s", libusb_error_name(ret));
- return SR_ERR;
- }
-
- if ((ret = libusb_control_transfer(usb->devhdl, 0x40, FTDI_SET_FLOWCTRL,
- FTDI_FLOW_NONE, FTDI_INDEX, NULL, 0, 10)) < 0) {
- sr_err("Failed to set flow control: %s", libusb_error_name(ret));
- return SR_ERR;
- }
-
- if ((ret = libusb_control_transfer(usb->devhdl, 0x40, FTDI_SET_MODEMCTRL,
- FTDI_MODEM_ALLHIGH, FTDI_INDEX, NULL, 0, 10)) < 0) {
- sr_err("Failed to set modem control: %s", libusb_error_name(ret));
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-
-/* Due to the modular nature of the Testo hardware, you can't assume
- * which measurements the device will supply. Fetch a single result
- * set synchronously to see which measurements it has. */
-SR_PRIV int testo_probe_channels(struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- struct sr_usb_dev_inst *usb;
- struct sr_channel *ch;
- int unit, packet_len, len, i;
- unsigned char packet[MAX_REPLY_SIZE], buf[MAX_REPLY_SIZE];
- char *probe_name;
-
- devc = sdi->priv;
- usb = sdi->conn;
-
- sr_dbg("Probing for channels.");
- if (sdi->driver->dev_open(sdi) != SR_OK)
- return SR_ERR;
- if (testo_set_serial_params(usb) != SR_OK)
- return SR_ERR;
-
- /* Flush anything buffered from a previous run. */
- do {
- libusb_bulk_transfer(usb->devhdl, EP_IN, buf, MAX_REPLY_SIZE, &len, 10);
- } while (len > 2);
-
- if (libusb_bulk_transfer(usb->devhdl, EP_OUT, devc->model->request,
- devc->model->request_size, &devc->reply_size, 10) < 0)
- return SR_ERR;
-
- packet_len = 0;
- while(TRUE) {
- if (libusb_bulk_transfer(usb->devhdl, EP_IN, buf, MAX_REPLY_SIZE,
- &len, 250) < 0)
- return SR_ERR;
- if (len == 2)
- /* FTDI cruft */
- continue;
- if (packet_len + len - 2 > MAX_REPLY_SIZE)
- return SR_ERR;
-
- memcpy(packet + packet_len, buf + 2, len - 2);
- packet_len += len - 2;
- if (packet_len < 5)
- /* Not even enough to check prefix yet. */
- continue;
-
- if (!testo_check_packet_prefix(packet, packet_len)) {
- /* Tail end of some previous data, drop it. */
- packet_len = 0;
- continue;
- }
-
- if (packet_len >= 7 + packet[6] * 7 + 2)
- /* Got a complete packet. */
- break;
- }
- sdi->driver->dev_close(sdi);
-
- if (packet[6] > MAX_CHANNELS) {
- sr_err("Device says it has %d channels!", packet[6]);
- return SR_ERR;
- }
-
- for (i = 0; i < packet[6]; i++) {
- unit = packet[7 + i * 7 + 4];
- devc->channel_units[i] = unit;
- switch (unit) {
- case 1:
- probe_name = "Temperature";
- break;
- case 3:
- probe_name = "Humidity";
- break;
- case 5:
- probe_name = "Windspeed";
- break;
- case 24:
- probe_name = "Pressure";
- break;
- default:
- sr_dbg("Unsupported measurement unit %d", unit);
- return SR_ERR;
- }
- ch = sr_channel_new(i, SR_CHANNEL_ANALOG, TRUE, probe_name);
- sdi->channels = g_slist_append(sdi->channels, ch);
- }
- devc->num_channels = packet[6];
- sr_dbg("Found %d channel%s.", devc->num_channels,
- devc->num_channels > 1 ? "s" : "");
-
- return SR_OK;
-}
-
-SR_PRIV int testo_request_packet(const struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- struct sr_usb_dev_inst *usb;
- int ret;
-
- devc = sdi->priv;
- usb = sdi->conn;
-
- libusb_fill_bulk_transfer(devc->out_transfer, usb->devhdl, EP_OUT,
- devc->model->request, devc->model->request_size,
- receive_transfer, (void *)sdi, 100);
- if ((ret = libusb_submit_transfer(devc->out_transfer) != 0)) {
- sr_err("Failed to request packet: %s.", libusb_error_name(ret));
- sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
- devc->cb_data);
- return SR_ERR;
- }
- sr_dbg("Requested new packet.");
-
- return SR_OK;
-}
-
-/* Check if the packet is well-formed. This matches packets for the
- * Testo 175/177/400/650/950/435/635/735/445/645/945/946/545. */
-SR_PRIV gboolean testo_check_packet_prefix(unsigned char *buf, int len)
-{
- int i;
- unsigned char check[] = { 0x21, 0, 0, 0, 1 };
-
- if (len < 5)
- return FALSE;
-
- for (i = 0; i < 5; i++) {
- if (buf[i] != check[i]) {
- sr_dbg("Packet has invalid prefix.");
- return FALSE;
- }
- }
-
- return TRUE;
-}
-
-SR_PRIV uint16_t crc16_mcrf4xx(uint16_t crc, uint8_t *data, size_t len)
-{
- int i;
-
- if (!data || !len)
- return crc;
-
- while (len--) {
- crc ^= *data++;
- for (i = 0; i < 8; i++) {
- if (crc & 1)
- crc = (crc >> 1) ^ 0x8408;
- else
- crc = (crc >> 1);
- }
- }
-
- return crc;
-}
-
-static float binary32_le_to_float(unsigned char *buf)
-{
- GFloatIEEE754 f;
-
- f.v_float = 0;
- f.mpn.sign = (buf[3] & 0x80) ? 1 : 0;
- f.mpn.biased_exponent = (buf[3] << 1) | (buf[2] >> 7);
- f.mpn.mantissa = buf[0] | (buf[1] << 8) | ((buf[2] & 0x7f) << 16);
-
- return f.v_float;
-}
-
-SR_PRIV void testo_receive_packet(const struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog;
- struct sr_channel *ch;
- GString *dbg;
- float value;
- int i;
- unsigned char *buf;
-
- devc = sdi->priv;
- sr_dbg("Got %d-byte packet.", devc->reply_size);
-
- if (sr_log_loglevel_get() >= SR_LOG_SPEW) {
- dbg = g_string_sized_new(128);
- g_string_printf(dbg, "Packet:");
- for (i = 0; i < devc->reply_size; i++)
- g_string_append_printf(dbg, " %.2x", devc->reply[i]);
- sr_spew("%s", dbg->str);
- g_string_free(dbg, TRUE);
- }
-
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog;
- analog.num_samples = 1;
- analog.mqflags = 0;
- analog.data = &value;
- /* Decode 7-byte values */
- for (i = 0; i < devc->reply[6]; i++) {
- buf = devc->reply + 7 + i * 7;
- value = binary32_le_to_float(buf);
- switch (buf[4]) {
- case 1:
- analog.mq = SR_MQ_TEMPERATURE;
- analog.unit = SR_UNIT_CELSIUS;
- break;
- case 3:
- analog.mq = SR_MQ_RELATIVE_HUMIDITY;
- analog.unit = SR_UNIT_HUMIDITY_293K;
- break;
- case 5:
- analog.mq = SR_MQ_WIND_SPEED;
- analog.unit = SR_UNIT_METER_SECOND;
- break;
- case 24:
- analog.mq = SR_MQ_PRESSURE;
- analog.unit = SR_UNIT_HECTOPASCAL;
- break;
- default:
- sr_dbg("Unsupported measurement unit %d.", buf[4]);
- return;
- }
-
- /* Match this measurement with its channel. */
- for (i = 0; i < devc->num_channels; i++) {
- if (devc->channel_units[i] == buf[4])
- break;
- }
- if (i == devc->num_channels) {
- /* Shouldn't happen. */
- sr_err("Some channel hotswapped in!");
- return;
- }
- ch = g_slist_nth_data(sdi->channels, i);
- analog.channels = g_slist_append(NULL, ch);
- sr_session_send(sdi, &packet);
- g_slist_free(analog.channels);
- }
-}
-
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