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 int digits[NUM_CHANNELS];
29 gboolean rec, std, max, min, maxmin, t1t2, rel, hold, lowbat, celsius;
30 gboolean memfull, autooff;
31 gboolean mode_std, mode_rel, mode_max, mode_min, mode_maxmin;
34 static int center_send(struct sr_serial_dev_inst *serial, const char *cmd)
38 if ((ret = serial_write_blocking(serial, cmd, strlen(cmd),
39 serial_timeout(serial, strlen(cmd)))) < 0) {
40 sr_err("Error sending '%s' command: %d.", cmd, ret);
47 SR_PRIV gboolean center_3xx_packet_valid(const uint8_t *buf)
49 return (buf[0] == 0x02 && buf[44] == 0x03);
52 static void log_packet(const uint8_t *buf, int idx)
57 s = g_string_sized_new(100);
58 g_string_printf(s, "Packet: ");
59 for (i = 0; i < center_devs[idx].packet_size; i++)
60 g_string_append_printf(s, "%02x ", buf[i]);
61 sr_spew("%s", s->str);
62 g_string_free(s, TRUE);
65 static int packet_parse(const uint8_t *buf, int idx, struct center_info *info)
72 /* Byte 0: Always 0x02. */
74 /* Byte 1: Various status bits. */
75 info->rec = (buf[1] & (1 << 0)) != 0;
76 info->mode_std = (((buf[1] >> 1) & 0x3) == 0);
77 info->mode_max = (((buf[1] >> 1) & 0x3) == 1);
78 info->mode_min = (((buf[1] >> 1) & 0x3) == 2);
79 info->mode_maxmin = (((buf[1] >> 1) & 0x3) == 3);
80 /* TODO: Rel. Not available on all models. */
81 info->t1t2 = (buf[1] & (1 << 3)) != 0;
82 info->rel = (buf[1] & (1 << 4)) != 0;
83 info->hold = (buf[1] & (1 << 5)) != 0;
84 info->lowbat = (buf[1] & (1 << 6)) != 0;
85 info->celsius = (buf[1] & (1 << 7)) != 0;
87 /* Byte 2: Further status bits. */
88 info->memfull = (buf[2] & (1 << 0)) != 0;
89 info->autooff = (buf[2] & (1 << 7)) != 0;
91 /* Byte 7+8/9+10/11+12/13+14: channel T1/T2/T3/T4 temperature. */
92 for (i = 0; i < NUM_CHANNELS; i++) {
93 temp_u16 = buf[8 + (i * 2)];
94 temp_u16 |= ((uint16_t)buf[7 + (i * 2)] << 8);
95 info->temp[i] = (float)temp_u16;
98 /* Byte 43: Specifies whether we need to divide the value(s) by 10. */
99 for (i = 0; i < NUM_CHANNELS; i++) {
100 /* Bit = 0: Divide by 10. Bit = 1: Don't divide by 10. */
101 if ((buf[43] & (1 << i)) == 0) {
109 /* Bytes 39-42: Overflow/overlimit bits, depending on mode. */
110 for (i = 0; i < NUM_CHANNELS; i++) {
111 if (info->mode_std && ((buf[39] & (1 << i)) != 0))
112 info->temp[i] = INFINITY;
113 /* TODO: Rel. Not available on all models. */
114 // if (info->mode_rel && ((buf[40] & (1 << i)) != 0))
115 // info->temp[i] = INFINITY;
116 if (info->mode_max && ((buf[41] & (1 << i)) != 0))
117 info->temp[i] = INFINITY;
118 if (info->mode_min && ((buf[42] & (1 << i)) != 0))
119 info->temp[i] = INFINITY;
123 /* Byte 44: Always 0x03. */
128 static int handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, int idx)
130 struct sr_datafeed_packet packet;
131 struct sr_datafeed_analog analog;
132 struct sr_analog_encoding encoding;
133 struct sr_analog_meaning meaning;
134 struct sr_analog_spec spec;
135 struct dev_context *devc;
136 struct center_info info;
142 /* Note: digits/spec_digits will be overridden later. */
143 sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
144 memset(&info, 0, sizeof(struct center_info));
146 ret = packet_parse(buf, idx, &info);
148 sr_err("Failed to parse packet.");
152 /* Common values for all 4 channels. */
153 packet.type = SR_DF_ANALOG;
154 packet.payload = &analog;
155 analog.meaning->mq = SR_MQ_TEMPERATURE;
156 analog.meaning->unit = (info.celsius) ? SR_UNIT_CELSIUS : SR_UNIT_FAHRENHEIT;
157 analog.num_samples = 1;
159 /* Send the values for T1 - T4. */
160 for (i = 0; i < NUM_CHANNELS; i++) {
162 l = g_slist_append(l, g_slist_nth_data(sdi->channels, i));
163 analog.meaning->channels = l;
164 analog.encoding->digits = info.digits[i];
165 analog.spec->spec_digits = info.digits[i];
166 analog.data = &(info.temp[i]);
167 sr_session_send(sdi, &packet);
171 sr_sw_limits_update_samples_read(&devc->sw_limits, 1);
176 /* Return TRUE if a full packet was parsed, FALSE otherwise. */
177 static gboolean handle_new_data(struct sr_dev_inst *sdi, int idx)
179 struct dev_context *devc;
180 struct sr_serial_dev_inst *serial;
181 int len, i, offset = 0, ret = FALSE;
186 /* Try to get as much data as the buffer can hold. */
187 len = SERIAL_BUFSIZE - devc->buflen;
188 len = serial_read_nonblocking(serial, devc->buf + devc->buflen, len);
190 sr_err("Serial port read error: %d.", len);
196 /* Now look for packets in that data. */
197 while ((devc->buflen - offset) >= center_devs[idx].packet_size) {
198 if (center_devs[idx].packet_valid(devc->buf + offset)) {
199 handle_packet(devc->buf + offset, sdi, idx);
200 offset += center_devs[idx].packet_size;
207 /* If we have any data left, move it to the beginning of our buffer. */
208 for (i = 0; i < devc->buflen - offset; i++)
209 devc->buf[i] = devc->buf[offset + i];
210 devc->buflen -= offset;
215 static int receive_data(int fd, int revents, int idx, void *cb_data)
217 struct sr_dev_inst *sdi;
218 struct dev_context *devc;
219 static gboolean request_new_packet = TRUE;
220 struct sr_serial_dev_inst *serial;
224 if (!(sdi = cb_data))
227 if (!(devc = sdi->priv))
232 if (revents == G_IO_IN) {
233 /* New data arrived. */
234 request_new_packet = handle_new_data(sdi, idx);
237 * Timeout. Send "A" to request a packet, but then don't send
238 * further "A" commands until we received a full packet first.
240 if (request_new_packet) {
241 center_send(serial, "A");
242 request_new_packet = FALSE;
246 if (sr_sw_limits_check(&devc->sw_limits))
247 sdi->driver->dev_acquisition_stop(sdi);
252 #define RECEIVE_DATA(ID_UPPER) \
253 SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \
254 return receive_data(fd, revents, ID_UPPER, cb_data); }
256 /* Driver-specific receive_data() wrappers */
257 RECEIVE_DATA(CENTER_309)
258 RECEIVE_DATA(VOLTCRAFT_K204)