+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2013 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 "protocol.h"
-
-struct center_info {
- float temp[4];
- gboolean rec, std, max, min, maxmin, t1t2, rel, hold, lowbat, celsius;
- gboolean memfull, autooff;
- gboolean mode_std, mode_rel, mode_max, mode_min, mode_maxmin;
-};
-
-static int center_send(struct sr_serial_dev_inst *serial, const char *cmd)
-{
- int ret;
-
- if ((ret = serial_write(serial, cmd, strlen(cmd))) < 0) {
- sr_err("Error sending '%s' command: %d.", cmd, ret);
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-SR_PRIV gboolean center_3xx_packet_valid(const uint8_t *buf)
-{
- return (buf[0] == 0x02 && buf[44] == 0x03);
-}
-
-static void log_packet(const uint8_t *buf, int idx)
-{
- int i;
- GString *s;
-
- s = g_string_sized_new(100);
- g_string_printf(s, "Packet: ");
- for (i = 0; i < center_devs[idx].packet_size; i++)
- g_string_append_printf(s, "%02x ", buf[i]);
- sr_spew("%s", s->str);
- g_string_free(s, TRUE);
-}
-
-static int packet_parse(const uint8_t *buf, int idx, struct center_info *info)
-{
- int i;
- uint16_t temp_u16;
-
- log_packet(buf, idx);
-
- /* Byte 0: Always 0x02. */
-
- /* Byte 1: Various status bits. */
- info->rec = (buf[1] & (1 << 0)) != 0;
- info->mode_std = (((buf[1] >> 1) & 0x3) == 0);
- info->mode_max = (((buf[1] >> 1) & 0x3) == 1);
- info->mode_min = (((buf[1] >> 1) & 0x3) == 2);
- info->mode_maxmin = (((buf[1] >> 1) & 0x3) == 3);
- /* TODO: Rel. Not available on all models. */
- info->t1t2 = (buf[1] & (1 << 3)) != 0;
- info->rel = (buf[1] & (1 << 4)) != 0;
- info->hold = (buf[1] & (1 << 5)) != 0;
- info->lowbat = (buf[1] & (1 << 6)) != 0;
- info->celsius = (buf[1] & (1 << 7)) != 0;
-
- /* Byte 2: Further status bits. */
- info->memfull = (buf[2] & (1 << 0)) != 0;
- info->autooff = (buf[2] & (1 << 7)) != 0;
-
- /* Byte 7+8/9+10/11+12/13+14: channel T1/T2/T3/T4 temperature. */
- for (i = 0; i < 4; i++) {
- temp_u16 = buf[8 + (i * 2)];
- temp_u16 |= ((uint16_t)buf[7 + (i * 2)] << 8);
- info->temp[i] = (float)temp_u16;
- }
-
- /* Byte 43: Specifies whether we need to divide the value(s) by 10. */
- for (i = 0; i < 4; i++) {
- /* Bit = 0: Divide by 10. Bit = 1: Don't divide by 10. */
- if ((buf[43] & (1 << i)) == 0)
- info->temp[i] /= 10;
- }
-
- /* Bytes 39-42: Overflow/overlimit bits, depending on mode. */
- for (i = 0; i < 4; i++) {
- if (info->mode_std && ((buf[39] & (1 << i)) != 0))
- info->temp[i] = INFINITY;
- /* TODO: Rel. Not available on all models. */
- // if (info->mode_rel && ((buf[40] & (1 << i)) != 0))
- // info->temp[i] = INFINITY;
- if (info->mode_max && ((buf[41] & (1 << i)) != 0))
- info->temp[i] = INFINITY;
- if (info->mode_min && ((buf[42] & (1 << i)) != 0))
- info->temp[i] = INFINITY;
- /* TODO: Minmax? */
- }
-
- /* Byte 44: Always 0x03. */
-
- return SR_OK;
-}
-
-static int handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, int idx)
-{
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog;
- struct dev_context *devc;
- struct center_info info;
- GSList *l;
- int i, ret;
-
- devc = sdi->priv;
-
- memset(&analog, 0, sizeof(struct sr_datafeed_analog));
- memset(&info, 0, sizeof(struct center_info));
-
- ret = packet_parse(buf, idx, &info);
- if (ret < 0) {
- sr_err("Failed to parse packet.");
- return SR_ERR;
- }
-
- /* Common values for all 4 channels. */
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog;
- analog.mq = SR_MQ_TEMPERATURE;
- analog.unit = (info.celsius) ? SR_UNIT_CELSIUS : SR_UNIT_FAHRENHEIT;
- analog.num_samples = 1;
-
- /* Send the values for T1 - T4. */
- for (i = 0; i < 4; i++) {
- l = NULL;
- l = g_slist_append(l, g_slist_nth_data(sdi->channels, i));
- analog.channels = l;
- analog.data = &(info.temp[i]);
- sr_session_send(devc->cb_data, &packet);
- g_slist_free(l);
- }
-
- devc->num_samples++;
-
- return SR_OK;
-}
-
-/* Return TRUE if a full packet was parsed, FALSE otherwise. */
-static gboolean handle_new_data(struct sr_dev_inst *sdi, int idx)
-{
- struct dev_context *devc;
- struct sr_serial_dev_inst *serial;
- int len, i, offset = 0, ret = FALSE;
-
- devc = sdi->priv;
- serial = sdi->conn;
-
- /* Try to get as much data as the buffer can hold. */
- len = SERIAL_BUFSIZE - devc->buflen;
- len = serial_read(serial, devc->buf + devc->buflen, len);
- if (len < 1) {
- sr_err("Serial port read error: %d.", len);
- return FALSE;
- }
-
- devc->buflen += len;
-
- /* Now look for packets in that data. */
- while ((devc->buflen - offset) >= center_devs[idx].packet_size) {
- if (center_devs[idx].packet_valid(devc->buf + offset)) {
- handle_packet(devc->buf + offset, sdi, idx);
- offset += center_devs[idx].packet_size;
- ret = TRUE;
- } else {
- offset++;
- }
- }
-
- /* If we have any data left, move it to the beginning of our buffer. */
- for (i = 0; i < devc->buflen - offset; i++)
- devc->buf[i] = devc->buf[offset + i];
- devc->buflen -= offset;
-
- return ret;
-}
-
-static int receive_data(int fd, int revents, int idx, void *cb_data)
-{
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- int64_t t;
- static gboolean request_new_packet = TRUE;
- struct sr_serial_dev_inst *serial;
-
- (void)fd;
-
- if (!(sdi = cb_data))
- return TRUE;
-
- if (!(devc = sdi->priv))
- return TRUE;
-
- serial = sdi->conn;
-
- if (revents == G_IO_IN) {
- /* New data arrived. */
- request_new_packet = handle_new_data(sdi, idx);
- } else {
- /*
- * Timeout. Send "A" to request a packet, but then don't send
- * further "A" commands until we received a full packet first.
- */
- if (request_new_packet) {
- center_send(serial, "A");
- request_new_packet = FALSE;
- }
- }
-
- 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;
- }
-
- if (devc->limit_msec) {
- t = (g_get_monotonic_time() - devc->starttime) / 1000;
- if (t > (int64_t)devc->limit_msec) {
- sr_info("Requested time limit reached.");
- sdi->driver->dev_acquisition_stop(sdi, cb_data);
- return TRUE;
- }
- }
-
- return TRUE;
-}
-
-#define RECEIVE_DATA(ID_UPPER) \
-SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \
- return receive_data(fd, revents, ID_UPPER, cb_data); }
-
-/* Driver-specific receive_data() wrappers */
-RECEIVE_DATA(CENTER_309)
-RECEIVE_DATA(VOLTCRAFT_K204)
projects / libsigrok.git / blobdiff