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
24 #define NUM_CHANNELS 4
27 float temp[NUM_CHANNELS];
28 gboolean rec, std, max, min, maxmin, t1t2, rel, hold, lowbat, celsius;
29 gboolean memfull, autooff;
30 gboolean mode_std, mode_rel, mode_max, mode_min, mode_maxmin;
33 static int center_send(struct sr_serial_dev_inst *serial, const char *cmd)
37 if ((ret = serial_write_blocking(serial, cmd, strlen(cmd), 0)) < 0) {
38 sr_err("Error sending '%s' command: %d.", cmd, ret);
45 SR_PRIV gboolean center_3xx_packet_valid(const uint8_t *buf)
47 return (buf[0] == 0x02 && buf[44] == 0x03);
50 static void log_packet(const uint8_t *buf, int idx)
55 s = g_string_sized_new(100);
56 g_string_printf(s, "Packet: ");
57 for (i = 0; i < center_devs[idx].packet_size; i++)
58 g_string_append_printf(s, "%02x ", buf[i]);
59 sr_spew("%s", s->str);
60 g_string_free(s, TRUE);
63 static int packet_parse(const uint8_t *buf, int idx, struct center_info *info)
70 /* Byte 0: Always 0x02. */
72 /* Byte 1: Various status bits. */
73 info->rec = (buf[1] & (1 << 0)) != 0;
74 info->mode_std = (((buf[1] >> 1) & 0x3) == 0);
75 info->mode_max = (((buf[1] >> 1) & 0x3) == 1);
76 info->mode_min = (((buf[1] >> 1) & 0x3) == 2);
77 info->mode_maxmin = (((buf[1] >> 1) & 0x3) == 3);
78 /* TODO: Rel. Not available on all models. */
79 info->t1t2 = (buf[1] & (1 << 3)) != 0;
80 info->rel = (buf[1] & (1 << 4)) != 0;
81 info->hold = (buf[1] & (1 << 5)) != 0;
82 info->lowbat = (buf[1] & (1 << 6)) != 0;
83 info->celsius = (buf[1] & (1 << 7)) != 0;
85 /* Byte 2: Further status bits. */
86 info->memfull = (buf[2] & (1 << 0)) != 0;
87 info->autooff = (buf[2] & (1 << 7)) != 0;
89 /* Byte 7+8/9+10/11+12/13+14: channel T1/T2/T3/T4 temperature. */
90 for (i = 0; i < NUM_CHANNELS; i++) {
91 temp_u16 = buf[8 + (i * 2)];
92 temp_u16 |= ((uint16_t)buf[7 + (i * 2)] << 8);
93 info->temp[i] = (float)temp_u16;
96 /* Byte 43: Specifies whether we need to divide the value(s) by 10. */
97 for (i = 0; i < NUM_CHANNELS; i++) {
98 /* Bit = 0: Divide by 10. Bit = 1: Don't divide by 10. */
99 if ((buf[43] & (1 << i)) == 0)
103 /* Bytes 39-42: Overflow/overlimit bits, depending on mode. */
104 for (i = 0; i < NUM_CHANNELS; i++) {
105 if (info->mode_std && ((buf[39] & (1 << i)) != 0))
106 info->temp[i] = INFINITY;
107 /* TODO: Rel. Not available on all models. */
108 // if (info->mode_rel && ((buf[40] & (1 << i)) != 0))
109 // info->temp[i] = INFINITY;
110 if (info->mode_max && ((buf[41] & (1 << i)) != 0))
111 info->temp[i] = INFINITY;
112 if (info->mode_min && ((buf[42] & (1 << i)) != 0))
113 info->temp[i] = INFINITY;
117 /* Byte 44: Always 0x03. */
122 static int handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, int idx)
124 struct sr_datafeed_packet packet;
125 struct sr_datafeed_analog analog;
126 struct dev_context *devc;
127 struct center_info info;
133 memset(&analog, 0, sizeof(struct sr_datafeed_analog));
134 memset(&info, 0, sizeof(struct center_info));
136 ret = packet_parse(buf, idx, &info);
138 sr_err("Failed to parse packet.");
142 /* Common values for all 4 channels. */
143 packet.type = SR_DF_ANALOG;
144 packet.payload = &analog;
145 analog.mq = SR_MQ_TEMPERATURE;
146 analog.unit = (info.celsius) ? SR_UNIT_CELSIUS : SR_UNIT_FAHRENHEIT;
147 analog.num_samples = 1;
149 /* Send the values for T1 - T4. */
150 for (i = 0; i < NUM_CHANNELS; i++) {
152 l = g_slist_append(l, g_slist_nth_data(sdi->channels, i));
154 analog.data = &(info.temp[i]);
155 sr_session_send(devc->cb_data, &packet);
164 /* Return TRUE if a full packet was parsed, FALSE otherwise. */
165 static gboolean handle_new_data(struct sr_dev_inst *sdi, int idx)
167 struct dev_context *devc;
168 struct sr_serial_dev_inst *serial;
169 int len, i, offset = 0, ret = FALSE;
174 /* Try to get as much data as the buffer can hold. */
175 len = SERIAL_BUFSIZE - devc->buflen;
176 len = serial_read_nonblocking(serial, devc->buf + devc->buflen, len);
178 sr_err("Serial port read error: %d.", len);
184 /* Now look for packets in that data. */
185 while ((devc->buflen - offset) >= center_devs[idx].packet_size) {
186 if (center_devs[idx].packet_valid(devc->buf + offset)) {
187 handle_packet(devc->buf + offset, sdi, idx);
188 offset += center_devs[idx].packet_size;
195 /* If we have any data left, move it to the beginning of our buffer. */
196 for (i = 0; i < devc->buflen - offset; i++)
197 devc->buf[i] = devc->buf[offset + i];
198 devc->buflen -= offset;
203 static int receive_data(int fd, int revents, int idx, void *cb_data)
205 struct sr_dev_inst *sdi;
206 struct dev_context *devc;
208 static gboolean request_new_packet = TRUE;
209 struct sr_serial_dev_inst *serial;
213 if (!(sdi = cb_data))
216 if (!(devc = sdi->priv))
221 if (revents == G_IO_IN) {
222 /* New data arrived. */
223 request_new_packet = handle_new_data(sdi, idx);
226 * Timeout. Send "A" to request a packet, but then don't send
227 * further "A" commands until we received a full packet first.
229 if (request_new_packet) {
230 center_send(serial, "A");
231 request_new_packet = FALSE;
235 if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
236 sr_info("Requested number of samples reached.");
237 sdi->driver->dev_acquisition_stop(sdi, cb_data);
241 if (devc->limit_msec) {
242 t = (g_get_monotonic_time() - devc->starttime) / 1000;
243 if (t > (int64_t)devc->limit_msec) {
244 sr_info("Requested time limit reached.");
245 sdi->driver->dev_acquisition_stop(sdi, cb_data);
253 #define RECEIVE_DATA(ID_UPPER) \
254 SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \
255 return receive_data(fd, revents, ID_UPPER, cb_data); }
257 /* Driver-specific receive_data() wrappers */
258 RECEIVE_DATA(CENTER_309)
259 RECEIVE_DATA(VOLTCRAFT_K204)