2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 gboolean rec, std, max, min, maxmin, t1t2, rel, hold, lowbat, celsius;
26 gboolean memfull, autooff;
27 gboolean mode_std, mode_rel, mode_max, mode_min, mode_maxmin;
30 static int center_send(struct sr_serial_dev_inst *serial, const char *cmd)
34 if ((ret = serial_write(serial, cmd, strlen(cmd))) < 0) {
35 sr_err("Error sending '%s' command: %d.", cmd, ret);
42 SR_PRIV gboolean center_3xx_packet_valid(const uint8_t *buf)
44 return (buf[0] == 0x02 && buf[44] == 0x03);
47 static void log_packet(const uint8_t *buf, int idx)
52 s = g_string_sized_new(100);
53 g_string_printf(s, "Packet: ");
54 for (i = 0; i < center_devs[idx].packet_size; i++)
55 g_string_append_printf(s, "%02x ", buf[i]);
56 sr_spew("%s", s->str);
57 g_string_free(s, TRUE);
60 static int packet_parse(const uint8_t *buf, int idx, struct center_info *info)
67 /* Byte 0: Always 0x02. */
69 /* Byte 1: Various status bits. */
70 info->rec = (buf[1] & (1 << 0)) != 0;
71 info->mode_std = (((buf[1] >> 1) & 0x3) == 0);
72 info->mode_max = (((buf[1] >> 1) & 0x3) == 1);
73 info->mode_min = (((buf[1] >> 1) & 0x3) == 2);
74 info->mode_maxmin = (((buf[1] >> 1) & 0x3) == 3);
75 /* TODO: Rel. Not available on all models. */
76 info->t1t2 = (buf[1] & (1 << 3)) != 0;
77 info->rel = (buf[1] & (1 << 4)) != 0;
78 info->hold = (buf[1] & (1 << 5)) != 0;
79 info->lowbat = (buf[1] & (1 << 6)) != 0;
80 info->celsius = (buf[1] & (1 << 7)) != 0;
82 /* Byte 2: Further status bits. */
83 info->memfull = (buf[2] & (1 << 0)) != 0;
84 info->autooff = (buf[2] & (1 << 7)) != 0;
86 /* Byte 7+8/9+10/11+12/13+14: channel T1/T2/T3/T4 temperature. */
87 for (i = 0; i < 4; i++) {
88 temp_u16 = buf[8 + (i * 2)];
89 temp_u16 |= ((uint16_t)buf[7 + (i * 2)] << 8);
90 info->temp[i] = (float)temp_u16;
93 /* Byte 43: Specifies whether we need to divide the value(s) by 10. */
94 for (i = 0; i < 4; i++) {
95 /* Bit = 0: Divide by 10. Bit = 1: Don't divide by 10. */
96 if ((buf[43] & (1 << i)) == 0)
100 /* Bytes 39-42: Overflow/overlimit bits, depending on mode. */
101 for (i = 0; i < 4; i++) {
102 if (info->mode_std && ((buf[39] & (1 << i)) != 0))
103 info->temp[i] = INFINITY;
104 /* TODO: Rel. Not available on all models. */
105 // if (info->mode_rel && ((buf[40] & (1 << i)) != 0))
106 // info->temp[i] = INFINITY;
107 if (info->mode_max && ((buf[41] & (1 << i)) != 0))
108 info->temp[i] = INFINITY;
109 if (info->mode_min && ((buf[42] & (1 << i)) != 0))
110 info->temp[i] = INFINITY;
114 /* Byte 44: Always 0x03. */
119 static int handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, int idx)
121 struct sr_datafeed_packet packet;
122 struct sr_datafeed_analog analog;
123 struct dev_context *devc;
124 struct center_info info;
130 memset(&analog, 0, sizeof(struct sr_datafeed_analog));
131 memset(&info, 0, sizeof(struct center_info));
133 ret = packet_parse(buf, idx, &info);
135 sr_err("Failed to parse packet.");
139 /* Common values for all 4 channels. */
140 packet.type = SR_DF_ANALOG;
141 packet.payload = &analog;
142 analog.mq = SR_MQ_TEMPERATURE;
143 analog.unit = (info.celsius) ? SR_UNIT_CELSIUS : SR_UNIT_FAHRENHEIT;
144 analog.num_samples = 1;
146 /* Send the values for T1 - T4. */
147 for (i = 0; i < 4; i++) {
149 l = g_slist_append(l, g_slist_nth_data(sdi->channels, i));
151 analog.data = &(info.temp[i]);
152 sr_session_send(devc->cb_data, &packet);
161 /* Return TRUE if a full packet was parsed, FALSE otherwise. */
162 static gboolean handle_new_data(struct sr_dev_inst *sdi, int idx)
164 struct dev_context *devc;
165 struct sr_serial_dev_inst *serial;
166 int len, i, offset = 0, ret = FALSE;
171 /* Try to get as much data as the buffer can hold. */
172 len = SERIAL_BUFSIZE - devc->buflen;
173 len = serial_read(serial, devc->buf + devc->buflen, len);
175 sr_err("Serial port read error: %d.", len);
181 /* Now look for packets in that data. */
182 while ((devc->buflen - offset) >= center_devs[idx].packet_size) {
183 if (center_devs[idx].packet_valid(devc->buf + offset)) {
184 handle_packet(devc->buf + offset, sdi, idx);
185 offset += center_devs[idx].packet_size;
192 /* If we have any data left, move it to the beginning of our buffer. */
193 for (i = 0; i < devc->buflen - offset; i++)
194 devc->buf[i] = devc->buf[offset + i];
195 devc->buflen -= offset;
200 static int receive_data(int fd, int revents, int idx, void *cb_data)
202 struct sr_dev_inst *sdi;
203 struct dev_context *devc;
205 static gboolean request_new_packet = TRUE;
206 struct sr_serial_dev_inst *serial;
210 if (!(sdi = cb_data))
213 if (!(devc = sdi->priv))
218 if (revents == G_IO_IN) {
219 /* New data arrived. */
220 request_new_packet = handle_new_data(sdi, idx);
223 * Timeout. Send "A" to request a packet, but then don't send
224 * further "A" commands until we received a full packet first.
226 if (request_new_packet) {
227 center_send(serial, "A");
228 request_new_packet = FALSE;
232 if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
233 sr_info("Requested number of samples reached.");
234 sdi->driver->dev_acquisition_stop(sdi, cb_data);
238 if (devc->limit_msec) {
239 t = (g_get_monotonic_time() - devc->starttime) / 1000;
240 if (t > (int64_t)devc->limit_msec) {
241 sr_info("Requested time limit reached.");
242 sdi->driver->dev_acquisition_stop(sdi, cb_data);
250 #define RECEIVE_DATA(ID_UPPER) \
251 SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \
252 return receive_data(fd, revents, ID_UPPER, cb_data); }
254 /* Driver-specific receive_data() wrappers */
255 RECEIVE_DATA(CENTER_309)
256 RECEIVE_DATA(VOLTCRAFT_K204)