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/>.
32 static gboolean appa_55ii_checksum(const uint8_t *buf)
34 int i, size = buf[3]+4, checksum = 0;
35 for (i=0; i<size; i++)
37 return buf[size] == (checksum & 0xFF);
40 SR_PRIV gboolean appa_55ii_packet_valid(const uint8_t *buf)
42 if (buf[0] == 0x55 && buf[1] == 0x55 && buf[3] <= 32
43 && appa_55ii_checksum(buf))
48 static uint64_t appa_55ii_flags(const uint8_t *buf)
50 uint8_t disp_mode = buf[4+13];
53 if ((disp_mode & 0xF0) == 0x20) flags |= SR_MQFLAG_HOLD;
54 if ((disp_mode & 0x0C) == 0x04) flags |= SR_MQFLAG_MAX;
55 if ((disp_mode & 0x0C) == 0x08) flags |= SR_MQFLAG_MIN;
56 if ((disp_mode & 0x0C) == 0x0C) flags |= SR_MQFLAG_AVG;
61 static float appa_55ii_temp(const uint8_t *buf, int probe)
63 const uint8_t *ptr = buf + 4 + 14 + 3*probe;
64 int16_t temp = RL16(ptr);
65 uint8_t flags = ptr[2];
67 if (flags & 0x60) return INFINITY;
68 else if (flags & 1) return (float)temp / 10;
69 else return (float)temp;
72 static void appa_55ii_live_data(struct sr_dev_inst *sdi, const uint8_t *buf)
74 struct dev_context *devc = sdi->priv;
75 struct sr_datafeed_packet packet;
76 struct sr_datafeed_analog analog = { 0 };
77 float values[APPA_55II_NUM_PROBES], *val_ptr = values;
80 if (devc->data_source != DATA_SOURCE_LIVE)
83 analog.num_samples = 1;
84 analog.mq = SR_MQ_TEMPERATURE;
85 analog.unit = SR_UNIT_CELSIUS;
86 analog.mqflags = appa_55ii_flags(buf);
89 for (i=0; i<APPA_55II_NUM_PROBES; i++) {
90 struct sr_probe *probe = g_slist_nth_data(sdi->probes, i);
93 analog.probes = g_slist_append(analog.probes, probe);
94 *val_ptr++ = appa_55ii_temp(buf, i);
97 packet.type = SR_DF_ANALOG;
98 packet.payload = &analog;
99 sr_session_send(devc->session_cb_data, &packet);
100 g_slist_free(analog.probes);
105 static void appa_55ii_log_metadata(struct sr_dev_inst *sdi, const uint8_t *buf)
107 struct dev_context *devc = sdi->priv;
108 devc->num_log_records = (buf[5] << 8) + buf[4];
111 static void appa_55ii_log_data_parse(struct sr_dev_inst *sdi)
113 struct dev_context *devc = sdi->priv;
116 while (devc->log_buf_len >= 20 && devc->num_log_records > 0) {
117 const uint8_t *buf = devc->log_buf + offset;
118 struct sr_datafeed_packet packet;
119 struct sr_datafeed_analog analog = { 0 };
120 float values[APPA_55II_NUM_PROBES], *val_ptr = values;
123 /* FIXME: timestamp should be sent in the packet */
124 sr_dbg("Timestamp: %02d:%02d:%02d", buf[2], buf[3], buf[4]);
126 analog.num_samples = 1;
127 analog.mq = SR_MQ_TEMPERATURE;
128 analog.unit = SR_UNIT_CELSIUS;
129 analog.data = values;
131 for (i=0; i<APPA_55II_NUM_PROBES; i++) {
132 int16_t temp = RL16(buf+12+2*i);
133 struct sr_probe *probe = g_slist_nth_data(sdi->probes, i);
136 analog.probes = g_slist_append(analog.probes, probe);
137 *val_ptr++ = temp == 0x7FFF ? INFINITY : (float)temp / 10;
140 packet.type = SR_DF_ANALOG;
141 packet.payload = &analog;
142 sr_session_send(devc->session_cb_data, &packet);
143 g_slist_free(analog.probes);
146 devc->log_buf_len -= 20;
148 devc->num_log_records--;
151 memmove(devc->log_buf, devc->log_buf + offset, devc->log_buf_len);
154 static void appa_55ii_log_data(struct sr_dev_inst *sdi, const uint8_t *buf)
156 struct dev_context *devc = sdi->priv;
157 const uint8_t *ptr = buf + 4;;
158 unsigned int size = buf[3];
160 if (devc->data_source != DATA_SOURCE_MEMORY)
164 int s = MIN(size, sizeof(devc->log_buf) - devc->log_buf_len);
165 memcpy(devc->log_buf + devc->log_buf_len, ptr, s);
166 devc->log_buf_len += s;
170 appa_55ii_log_data_parse(sdi);
174 static void appa_55ii_log_end(struct sr_dev_inst *sdi)
176 struct dev_context *devc = sdi->priv;
178 if (devc->data_source != DATA_SOURCE_MEMORY)
181 sdi->driver->dev_acquisition_stop(sdi, devc->session_cb_data);
184 static const uint8_t *appa_55ii_parse_data(struct sr_dev_inst *sdi,
185 const uint8_t *buf, int len)
188 return NULL; /* need more data */
190 if (buf[0] != 0x55 || buf[1] != 0x55)
191 return buf + 1; /* try to re-synchronize on a packet start */
194 return NULL; /* need more data */
196 if (!appa_55ii_checksum(buf))
197 return buf + 4 + buf[3] + 1; /* skip broken packet */
199 switch ((PacketType) buf[2]) {
200 case LIVE_DATA: appa_55ii_live_data(sdi, buf); break;
201 case LOG_METADATA: appa_55ii_log_metadata(sdi, buf); break;
202 case LOG_DATA: appa_55ii_log_data(sdi, buf); break;
203 case LOG_START: break;
204 case LOG_END: appa_55ii_log_end(sdi); break;
207 return buf + 4 + buf[3] + 1;
210 SR_PRIV int appa_55ii_receive_data(int fd, int revents, void *cb_data)
212 struct sr_dev_inst *sdi;
213 struct dev_context *devc;
214 struct sr_serial_dev_inst *serial;
215 const uint8_t *ptr, *next_ptr, *end_ptr;
220 if (!(sdi = cb_data) || !(devc = sdi->priv) || revents != G_IO_IN)
224 /* Try to get as much data as the buffer can hold. */
225 len = sizeof(devc->buf) - devc->buf_len;
226 len = serial_read(serial, devc->buf + devc->buf_len, len);
228 sr_err("Serial port read error: %d.", len);
231 devc->buf_len += len;
233 /* Now look for packets in that data. */
235 end_ptr = ptr + devc->buf_len;
236 while ((next_ptr = appa_55ii_parse_data(sdi, ptr, end_ptr - ptr)))
239 /* If we have any data left, move it to the beginning of our buffer. */
240 memmove(devc->buf, ptr, end_ptr - ptr);
241 devc->buf_len -= ptr - devc->buf;
243 /* If buffer is full and no valid packet was found, wipe buffer. */
244 if (devc->buf_len >= sizeof(devc->buf)) {
249 if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
250 sr_info("Requested number of samples reached.");
251 sdi->driver->dev_acquisition_stop(sdi, devc->session_cb_data);
255 if (devc->limit_msec) {
256 int64_t time = (g_get_monotonic_time() - devc->start_time) / 1000;
257 if (time > (int64_t)devc->limit_msec) {
258 sr_info("Requested time limit reached.");
259 sdi->driver->dev_acquisition_stop(sdi, devc->session_cb_data);