+++ /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"
-
-static int mic_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 int mic_cmd_get_device_info(struct sr_serial_dev_inst *serial)
-{
- return mic_send(serial, "I\r");
-}
-
-static int mic_cmd_set_realtime_mode(struct sr_serial_dev_inst *serial)
-{
- return mic_send(serial, "S 1 M 2 32 3\r");
-}
-
-SR_PRIV gboolean packet_valid_temp(const uint8_t *buf)
-{
- if (buf[0] != 'v' || buf[1] != ' ' || buf[5] != '\r')
- return FALSE;
-
- if (!isdigit(buf[2]) || !isdigit(buf[3]) || !isdigit(buf[4]))
- return FALSE;
-
- return TRUE;
-}
-
-SR_PRIV gboolean packet_valid_temp_hum(const uint8_t *buf)
-{
- if (buf[0] != 'v' || buf[1] != ' ' || buf[5] != ' ' || buf[9] != '\r')
- return FALSE;
-
- if (!isdigit(buf[2]) || !isdigit(buf[3]) || !isdigit(buf[4]))
- return FALSE;
-
- if (!isdigit(buf[6]) || !isdigit(buf[7]) || !isdigit(buf[8]))
- return FALSE;
-
- return TRUE;
-}
-
-static int packet_parse(const char *buf, int idx, float *temp, float *humidity)
-{
- char tmp[4];
-
- /* Packet format MIC98581: "v ttt\r". */
- /* Packet format MIC98583: "v ttt hhh\r". */
-
- /* TODO: Sanity check on buf. For now we assume well-formed ASCII. */
-
- tmp[3] = '\0';
-
- strncpy((char *)&tmp, &buf[2], 3);
- *temp = g_ascii_strtoull((const char *)&tmp, NULL, 10) / 10;
-
- if (mic_devs[idx].has_humidity) {
- strncpy((char *)&tmp, &buf[6], 3);
- *humidity = g_ascii_strtoull((const char *)&tmp, NULL, 10) / 10;
- }
-
- return SR_OK;
-}
-
-static int handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, int idx)
-{
- float temperature, humidity;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog;
- struct dev_context *devc;
- GSList *l;
- int ret;
-
- (void)idx;
-
- devc = sdi->priv;
-
- ret = packet_parse((const char *)buf, idx, &temperature, &humidity);
- if (ret < 0) {
- sr_err("Failed to parse packet.");
- return SR_ERR;
- }
-
- /* Clear 'analog', otherwise it'll contain random garbage. */
- memset(&analog, 0, sizeof(struct sr_datafeed_analog));
-
- /* Common values for both channels. */
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog;
- analog.num_samples = 1;
-
- /* Temperature. */
- l = g_slist_copy(sdi->channels);
- l = g_slist_remove_link(l, g_slist_nth(l, 1));
- analog.channels = l;
- analog.mq = SR_MQ_TEMPERATURE;
- analog.unit = SR_UNIT_CELSIUS; /* TODO: Use C/F correctly. */
- analog.data = &temperature;
- sr_session_send(devc->cb_data, &packet);
- g_slist_free(l);
-
- /* Humidity. */
- if (mic_devs[idx].has_humidity) {
- l = g_slist_copy(sdi->channels);
- l = g_slist_remove_link(l, g_slist_nth(l, 0));
- analog.channels = l;
- analog.mq = SR_MQ_RELATIVE_HUMIDITY;
- analog.unit = SR_UNIT_PERCENTAGE;
- analog.data = &humidity;
- sr_session_send(devc->cb_data, &packet);
- g_slist_free(l);
- }
-
- devc->num_samples++;
-
- return SR_OK;
-}
-
-static void 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;
-
- 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;
- }
-
- devc->buflen += len;
-
- /* Now look for packets in that data. */
- while ((devc->buflen - offset) >= mic_devs[idx].packet_size) {
- if (mic_devs[idx].packet_valid(devc->buf + offset)) {
- handle_packet(devc->buf + offset, sdi, idx);
- offset += mic_devs[idx].packet_size;
- } 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;
-}
-
-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 first_time = 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. */
- handle_new_data(sdi, idx);
- } else {
- /* Timeout. */
- if (first_time) {
- mic_cmd_set_realtime_mode(serial);
- first_time = 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(MIC_98581)
-RECEIVE_DATA(MIC_98583)
projects / libsigrok.git / blobdiff