2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013 Aurelien Jacobs <aurel@gnuage.org>
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 3 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, see <http://www.gnu.org/licenses/>.
33 static gboolean appa_55ii_checksum(const uint8_t *buf)
35 int i, size, checksum;
39 for (i = 0; i < size; i++)
42 return buf[size] == (checksum & 0xFF);
45 SR_PRIV gboolean appa_55ii_packet_valid(const uint8_t *buf)
47 if (buf[0] == 0x55 && buf[1] == 0x55 && buf[3] <= 32
48 && appa_55ii_checksum(buf))
54 static uint64_t appa_55ii_flags(const uint8_t *buf)
59 disp_mode = buf[4 + 13];
61 if ((disp_mode & 0xF0) == 0x20)
62 flags |= SR_MQFLAG_HOLD;
63 if ((disp_mode & 0x0C) == 0x04)
64 flags |= SR_MQFLAG_MAX;
65 if ((disp_mode & 0x0C) == 0x08)
66 flags |= SR_MQFLAG_MIN;
67 if ((disp_mode & 0x0C) == 0x0C)
68 flags |= SR_MQFLAG_AVG;
73 static float appa_55ii_temp(const uint8_t *buf, int ch)
79 ptr = buf + 4 + 14 + 3 * ch;
86 return (float)temp / 10;
91 static void appa_55ii_live_data(struct sr_dev_inst *sdi, const uint8_t *buf)
93 struct dev_context *devc;
94 struct sr_datafeed_packet packet;
95 struct sr_datafeed_analog_old analog;
96 struct sr_channel *ch;
97 float values[APPA_55II_NUM_CHANNELS], *val_ptr;
102 if (devc->data_source != DATA_SOURCE_LIVE)
106 memset(&analog, 0, sizeof(struct sr_datafeed_analog_old));
107 analog.num_samples = 1;
108 analog.mq = SR_MQ_TEMPERATURE;
109 analog.unit = SR_UNIT_CELSIUS;
110 analog.mqflags = appa_55ii_flags(buf);
111 analog.data = values;
113 for (i = 0; i < APPA_55II_NUM_CHANNELS; i++) {
114 ch = g_slist_nth_data(sdi->channels, i);
117 analog.channels = g_slist_append(analog.channels, ch);
118 *val_ptr++ = appa_55ii_temp(buf, i);
121 packet.type = SR_DF_ANALOG_OLD;
122 packet.payload = &analog;
123 sr_session_send(devc->session_cb_data, &packet);
124 g_slist_free(analog.channels);
129 static void appa_55ii_log_metadata(struct sr_dev_inst *sdi, const uint8_t *buf)
131 struct dev_context *devc;
134 devc->num_log_records = (buf[5] << 8) + buf[4];
137 static void appa_55ii_log_data_parse(struct sr_dev_inst *sdi)
139 struct dev_context *devc;
140 struct sr_datafeed_packet packet;
141 struct sr_datafeed_analog_old analog;
142 struct sr_channel *ch;
143 float values[APPA_55II_NUM_CHANNELS], *val_ptr;
151 while (devc->log_buf_len >= 20 && devc->num_log_records > 0) {
152 buf = devc->log_buf + offset;
155 /* FIXME: Timestamp should be sent in the packet. */
156 sr_dbg("Timestamp: %02d:%02d:%02d", buf[2], buf[3], buf[4]);
158 memset(&analog, 0, sizeof(struct sr_datafeed_analog_old));
159 analog.num_samples = 1;
160 analog.mq = SR_MQ_TEMPERATURE;
161 analog.unit = SR_UNIT_CELSIUS;
162 analog.data = values;
164 for (i = 0; i < APPA_55II_NUM_CHANNELS; i++) {
165 temp = RL16(buf + 12 + 2 * i);
166 ch = g_slist_nth_data(sdi->channels, i);
169 analog.channels = g_slist_append(analog.channels, ch);
170 *val_ptr++ = temp == 0x7FFF ? INFINITY : (float)temp / 10;
173 packet.type = SR_DF_ANALOG_OLD;
174 packet.payload = &analog;
175 sr_session_send(devc->session_cb_data, &packet);
176 g_slist_free(analog.channels);
179 devc->log_buf_len -= 20;
181 devc->num_log_records--;
184 memmove(devc->log_buf, devc->log_buf + offset, devc->log_buf_len);
187 static void appa_55ii_log_data(struct sr_dev_inst *sdi, const uint8_t *buf)
189 struct dev_context *devc;
195 if (devc->data_source != DATA_SOURCE_MEMORY)
201 s = MIN(size, sizeof(devc->log_buf) - devc->log_buf_len);
202 memcpy(devc->log_buf + devc->log_buf_len, ptr, s);
203 devc->log_buf_len += s;
207 appa_55ii_log_data_parse(sdi);
211 static void appa_55ii_log_end(struct sr_dev_inst *sdi)
213 struct dev_context *devc;
216 if (devc->data_source != DATA_SOURCE_MEMORY)
219 sdi->driver->dev_acquisition_stop(sdi, devc->session_cb_data);
222 static const uint8_t *appa_55ii_parse_data(struct sr_dev_inst *sdi,
223 const uint8_t *buf, int len)
226 /* Need more data. */
229 if (buf[0] != 0x55 || buf[1] != 0x55)
230 /* Try to re-synchronize on a packet start. */
233 if (len < 5 + buf[3])
234 /* Need more data. */
237 if (!appa_55ii_checksum(buf))
238 /* Skip broken packet. */
239 return buf + 4 + buf[3] + 1;
241 switch ((packet_type)buf[2]) {
243 appa_55ii_live_data(sdi, buf);
246 appa_55ii_log_metadata(sdi, buf);
249 appa_55ii_log_data(sdi, buf);
254 appa_55ii_log_end(sdi);
257 sr_warn("Invalid packet type: 0x%02x.", buf[2]);
261 return buf + 4 + buf[3] + 1;
264 SR_PRIV int appa_55ii_receive_data(int fd, int revents, void *cb_data)
266 struct sr_dev_inst *sdi;
267 struct dev_context *devc;
268 struct sr_serial_dev_inst *serial;
270 const uint8_t *ptr, *next_ptr, *end_ptr;
275 if (!(sdi = cb_data) || !(devc = sdi->priv) || revents != G_IO_IN)
279 /* Try to get as much data as the buffer can hold. */
280 len = sizeof(devc->buf) - devc->buf_len;
281 len = serial_read_nonblocking(serial, devc->buf + devc->buf_len, len);
283 sr_err("Serial port read error: %d.", len);
286 devc->buf_len += len;
288 /* Now look for packets in that data. */
290 end_ptr = ptr + devc->buf_len;
291 while ((next_ptr = appa_55ii_parse_data(sdi, ptr, end_ptr - ptr)))
294 /* If we have any data left, move it to the beginning of our buffer. */
295 memmove(devc->buf, ptr, end_ptr - ptr);
296 devc->buf_len -= ptr - devc->buf;
298 /* If buffer is full and no valid packet was found, wipe buffer. */
299 if (devc->buf_len >= sizeof(devc->buf)) {
304 if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
305 sr_info("Requested number of samples reached.");
306 sdi->driver->dev_acquisition_stop(sdi, devc->session_cb_data);
310 if (devc->limit_msec) {
311 time = (g_get_monotonic_time() - devc->start_time) / 1000;
312 if (time > (int64_t)devc->limit_msec) {
313 sr_info("Requested time limit reached.");
314 sdi->driver->dev_acquisition_stop(sdi,
315 devc->session_cb_data);