* This file is part of the libsigrok project.
*
* Copyright (C) 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
+ * Copyright (C) 2014 Bert Vermeulen <bert@biot.com> (code from atten-pps3xxx)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+/** @file
+ * <em>Motech LPS-30x series</em> power supply driver
+ * @internal
+ */
+
+#include <errno.h>
+#include <string.h>
+
#include "protocol.h"
+/** Send data packets for current measurements. */
+static void send_data(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog;
+ int i;
+ float data[MAX_CHANNELS];
+
+ devc = sdi->priv;
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ analog.channels = sdi->channels;
+ analog.num_samples = 1;
+
+ analog.mq = SR_MQ_VOLTAGE;
+ analog.unit = SR_UNIT_VOLT;
+ analog.mqflags = SR_MQFLAG_DC;
+ analog.data = data;
+ for (i = 0; i < devc->model->num_channels; i++)
+ analog.data[i] = devc->channel_status[i].output_voltage_last; /* Value always 3.3 or 5 for channel 3, if present! */
+ sr_session_send(sdi, &packet);
+
+ analog.mq = SR_MQ_CURRENT;
+ analog.unit = SR_UNIT_AMPERE;
+ analog.mqflags = 0;
+ analog.data = data;
+ for (i = 0; i < devc->model->num_channels; i++)
+ analog.data[i] = devc->channel_status[i].output_current_last; /* Value always 0 for channel 3, if present! */
+ sr_session_send(sdi, &packet);
+
+ devc->num_samples++;
+}
+
+/** Process a complete line (without CR/LF) in buf. */
+static void process_line(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+ double dbl;
+ int auxint;
+
+ devc = sdi->priv;
+ serial = sdi->conn;
+
+ switch (devc->acq_req_pending) {
+ case 0: /* Should not happen... */
+ break;
+ case 1: /* Waiting for data reply to request */
+ /* Convert numbers */
+ switch (devc->acq_req) {
+ case AQ_U1: case AQ_U2: case AQ_I1: case AQ_I2:
+ if (sr_atod(devc->buf, &dbl) != SR_OK) {
+ sr_err("Failed to convert '%s' to double, errno=%d %s",
+ devc->buf, errno, strerror(errno));
+ dbl = 0.0;
+ }
+ break;
+ case AQ_STATUS:
+ if (sr_atoi(devc->buf, &auxint) != SR_OK) {
+ sr_err("Failed to convert '%s' to int, errno=%d %s",
+ devc->buf, errno, strerror(errno));
+ auxint = 0;
+ }
+ break;
+ default:
+ break;
+ }
+
+ switch (devc->acq_req) {
+ case AQ_U1:
+ devc->channel_status[0].output_voltage_last = dbl;
+ break;
+ case AQ_I1:
+ devc->channel_status[0].output_current_last = dbl;
+ break;
+ case AQ_U2:
+ devc->channel_status[1].output_voltage_last = dbl;
+ break;
+ case AQ_I2:
+ devc->channel_status[1].output_current_last = dbl;
+ break;
+ case AQ_STATUS: /* Process status and generate data. */
+ if (lps_process_status(sdi, auxint) == SR_OK) {
+ send_data(sdi);
+ }
+ break;
+ default:
+ break;
+ }
+
+ devc->acq_req_pending = 2;
+ break;
+ case 2: /* Waiting for OK after request */
+ if (strcmp(devc->buf, "OK")) {
+ sr_err("Unexpected reply while waiting for OK: '%s'", devc->buf);
+ }
+ devc->acq_req_pending = 0;
+ break;
+ }
+
+ devc->buf[0] = '\0';
+ devc->buflen = 0;
+}
+
+
SR_PRIV int motech_lps_30x_receive_data(int fd, int revents, void *cb_data)
{
- const struct sr_dev_inst *sdi;
+ struct sr_dev_inst *sdi;
struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+ // char achar;
+ int len;
+ gdouble elapsed_s;
(void)fd;
if (!(devc = sdi->priv))
return TRUE;
- if (revents == G_IO_IN) {
- /* TODO */
+ serial = sdi->conn;
+
+ if (revents == G_IO_IN) { /* Serial data arrived. */
+ while (LINELEN_MAX - devc->buflen - 2 > 0) {
+ len = serial_read(serial, devc->buf + devc->buflen, 1);
+ if (len < 1)
+ break;
+
+ /* Eliminate whitespace at beginning of line. */
+ if (g_ascii_isspace(devc->buf[0])) {
+ devc->buf[0] = '\0';
+ devc->buflen = 0;
+ continue;
+ }
+
+ // achar = *(devc->buf + devc->buflen);
+ // sr_spew("read 0x%02x/%d/'%c'", achar, achar, achar);
+
+ devc->buflen += len;
+ devc->buf[devc->buflen] = '\0';
+
+ /* If line complete, process msg. */
+ if ((devc->buflen > 0) && ((devc->buf[devc->buflen-1] == '\r') || devc->buf[devc->buflen-1] == '\n')) {
+ devc->buflen--;
+ devc->buf[devc->buflen] = '\0';
+
+ sr_spew("Line complete: \"%s\"", devc->buf);
+ process_line(sdi);
+ }
+ }
+ }
+
+ /* If number of samples or time limit reached, stop acquisition. */
+ if (devc->limit_samples && (devc->num_samples >= devc->limit_samples))
+ sdi->driver->dev_acquisition_stop(sdi, cb_data);
+
+ if (devc->limit_msec) {
+ elapsed_s = g_timer_elapsed(devc->elapsed_msec, NULL);
+ if ((elapsed_s * 1000) >= devc->limit_msec)
+ sdi->driver->dev_acquisition_stop(sdi, cb_data);
+ }
+
+ /* Request next packet, if required. */
+ if ((sdi->status == SR_ST_ACTIVE) && (devc->acq_running)){
+ if (devc->acq_req_pending) {
+ gint64 elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
+ if (elapsed_us > (REQ_TIMEOUT_MS * 1000)) {
+ sr_spew("Request timeout: req=%d t=%lldus", (int)devc->acq_req, elapsed_us);
+ devc->acq_req_pending = 0;
+ }
+ }
+ if (devc->acq_req_pending == 0) {
+ switch(devc->acq_req)
+ {
+ case AQ_NONE: /* Fall through */
+ case AQ_STATUS:
+ devc->acq_req = AQ_U1;
+ lps_send_req(serial, "VOUT1");
+ break;
+ case AQ_U1:
+ devc->acq_req = AQ_I1;
+ lps_send_req(serial, "IOUT1");
+ break;
+ case AQ_I1:
+ if (devc->model->num_channels == 1) {
+ devc->acq_req = AQ_STATUS;
+ lps_send_req(serial, "STATUS");
+ } else {
+ devc->acq_req = AQ_U2;
+ lps_send_req(serial, "VOUT2");
+ }
+ break;
+ case AQ_U2:
+ devc->acq_req = AQ_I2;
+ lps_send_req(serial, "IOUT2");
+ break;
+ case AQ_I2:
+ devc->acq_req = AQ_STATUS;
+ lps_send_req(serial, "STATUS");
+ break;
+ default:
+ sr_err("Illegal devc->acq_req=%d", devc->acq_req);
+ return SR_ERR;
+ }
+ devc->req_sent_at = g_get_real_time();
+ devc->acq_req_pending = 1;
+ }
}
return TRUE;
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