2 * This file is part of the libsigrok project.
4 * Copyright (C) 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
5 * Copyright (C) 2014 Bert Vermeulen <bert@biot.com> (code from atten-pps3xxx)
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 * <em>Motech LPS-30x series</em> power supply driver
30 /** Send data packets for current measurements. */
31 static void send_data(struct sr_dev_inst *sdi)
33 struct dev_context *devc;
34 struct sr_datafeed_packet packet;
35 struct sr_datafeed_analog analog;
37 float data[MAX_CHANNELS];
40 packet.type = SR_DF_ANALOG;
41 packet.payload = &analog;
42 analog.channels = sdi->channels;
43 analog.num_samples = 1;
45 analog.mq = SR_MQ_VOLTAGE;
46 analog.unit = SR_UNIT_VOLT;
47 analog.mqflags = SR_MQFLAG_DC;
49 for (i = 0; i < devc->model->num_channels; i++)
50 analog.data[i] = devc->channel_status[i].output_voltage_last; /* Value always 3.3 or 5 for channel 3, if present! */
51 sr_session_send(sdi, &packet);
53 analog.mq = SR_MQ_CURRENT;
54 analog.unit = SR_UNIT_AMPERE;
57 for (i = 0; i < devc->model->num_channels; i++)
58 analog.data[i] = devc->channel_status[i].output_current_last; /* Value always 0 for channel 3, if present! */
59 sr_session_send(sdi, &packet);
64 /** Process a complete line (without CR/LF) in buf. */
65 static void process_line(struct sr_dev_inst *sdi)
67 struct dev_context *devc;
73 switch (devc->acq_req_pending) {
74 case 0: /* Should not happen... */
76 case 1: /* Waiting for data reply to request */
78 switch (devc->acq_req) {
83 if (sr_atod(devc->buf, &dbl) != SR_OK) {
84 sr_err("Failed to convert '%s' to double, errno=%d %s",
85 devc->buf, errno, strerror(errno));
90 if (sr_atoi(devc->buf, &auxint) != SR_OK) {
91 sr_err("Failed to convert '%s' to int, errno=%d %s",
92 devc->buf, errno, strerror(errno));
100 switch (devc->acq_req) {
102 devc->channel_status[0].output_voltage_last = dbl;
105 devc->channel_status[0].output_current_last = dbl;
108 devc->channel_status[1].output_voltage_last = dbl;
111 devc->channel_status[1].output_current_last = dbl;
113 case AQ_STATUS: /* Process status and generate data. */
114 if (lps_process_status(sdi, auxint) == SR_OK) {
122 devc->acq_req_pending = 2;
124 case 2: /* Waiting for OK after request */
125 if (strcmp(devc->buf, "OK")) {
126 sr_err("Unexpected reply while waiting for OK: '%s'", devc->buf);
128 devc->acq_req_pending = 0;
136 SR_PRIV int motech_lps_30x_receive_data(int fd, int revents, void *cb_data)
138 struct sr_dev_inst *sdi;
139 struct dev_context *devc;
140 struct sr_serial_dev_inst *serial;
146 if (!(sdi = cb_data))
149 if (!(devc = sdi->priv))
154 if (revents == G_IO_IN) { /* Serial data arrived. */
155 while (LINELEN_MAX - devc->buflen - 2 > 0) {
156 len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
160 /* Eliminate whitespace at beginning of line. */
161 if (g_ascii_isspace(devc->buf[0])) {
168 devc->buf[devc->buflen] = '\0';
170 /* If line complete, process msg. */
171 if ((devc->buflen > 0) && ((devc->buf[devc->buflen-1] == '\r') || devc->buf[devc->buflen-1] == '\n')) {
173 devc->buf[devc->buflen] = '\0';
175 sr_spew("Line complete: \"%s\"", devc->buf);
181 /* If number of samples or time limit reached, stop acquisition. */
182 if (devc->limit_samples && (devc->num_samples >= devc->limit_samples))
183 sdi->driver->dev_acquisition_stop(sdi, cb_data);
185 if (devc->limit_msec) {
186 elapsed_s = g_timer_elapsed(devc->elapsed_msec, NULL);
187 if ((elapsed_s * 1000) >= devc->limit_msec)
188 sdi->driver->dev_acquisition_stop(sdi, cb_data);
191 /* Only request the next packet if required. */
192 if (!((sdi->status == SR_ST_ACTIVE) && (devc->acq_running)))
195 if (devc->acq_req_pending) {
196 gint64 elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
197 if (elapsed_us > (REQ_TIMEOUT_MS * 1000)) {
198 sr_spew("Request timeout: req=%d t=%lldus", (int)devc->acq_req, elapsed_us);
199 devc->acq_req_pending = 0;
203 if (devc->acq_req_pending == 0) {
204 switch (devc->acq_req) {
205 case AQ_NONE: /* Fall through */
207 devc->acq_req = AQ_U1;
208 lps_send_req(serial, "VOUT1");
211 devc->acq_req = AQ_I1;
212 lps_send_req(serial, "IOUT1");
215 if (devc->model->num_channels == 1) {
216 devc->acq_req = AQ_STATUS;
217 lps_send_req(serial, "STATUS");
219 devc->acq_req = AQ_U2;
220 lps_send_req(serial, "VOUT2");
224 devc->acq_req = AQ_I2;
225 lps_send_req(serial, "IOUT2");
228 devc->acq_req = AQ_STATUS;
229 lps_send_req(serial, "STATUS");
232 sr_err("Illegal devc->acq_req=%d", devc->acq_req);
235 devc->req_sent_at = g_get_real_time();
236 devc->acq_req_pending = 1;