336 lines
8.0 KiB
C
336 lines
8.0 KiB
C
/*
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* This file is part of the sigrok project.
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*
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* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <glib.h>
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#include "libsigrok.h"
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#include "libsigrok-internal.h"
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#include "config.h"
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#include "agilent-dmm.h"
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <math.h>
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static void dispatch(const struct sr_dev_inst *sdi)
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{
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struct dev_context *devc;
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const struct agdmm_job *jobs;
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int64_t now;
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int i;
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devc = sdi->priv;
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jobs = devc->profile->jobs;
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now = g_get_monotonic_time() / 1000;
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for (i = 0; (&jobs[i])->interval; i++) {
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if (now - devc->jobqueue[i] > (&jobs[i])->interval) {
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sr_spew("agilent-dmm: running job %d", i);
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(&jobs[i])->send(sdi);
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devc->jobqueue[i] = now;
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}
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}
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}
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static void receive_line(const struct sr_dev_inst *sdi)
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{
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struct dev_context *devc;
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const struct agdmm_recv *recvs, *recv;
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GRegex *reg;
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GMatchInfo *match;
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int i;
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devc = sdi->priv;
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/* Strip CRLF */
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while (devc->buflen) {
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if (*(devc->buf + devc->buflen - 1) == '\r'
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|| *(devc->buf + devc->buflen - 1) == '\n')
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*(devc->buf + --devc->buflen) = '\0';
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else
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break;
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}
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sr_spew("agilent-dmm: received '%s'", devc->buf);
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recv = NULL;
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recvs = devc->profile->recvs;
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for (i = 0; (&recvs[i])->recv_regex; i++) {
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reg = g_regex_new((&recvs[i])->recv_regex, 0, 0, NULL);
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if (g_regex_match(reg, (char *)devc->buf, 0, &match)) {
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recv = &recvs[i];
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break;
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}
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g_match_info_unref(match);
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g_regex_unref(reg);
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}
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if (recv) {
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recv->recv(sdi, match);
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g_match_info_unref(match);
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g_regex_unref(reg);
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}
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/* Done with this. */
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devc->buflen = 0;
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}
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SR_PRIV int agdmm_receive_data(int fd, int revents, void *cb_data)
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{
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const struct sr_dev_inst *sdi;
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struct dev_context *devc;
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int len;
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if (!(sdi = cb_data))
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return TRUE;
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if (!(devc = sdi->priv))
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return TRUE;
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if (revents == G_IO_IN) {
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/* Serial data arrived. */
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len = AGDMM_BUFSIZE - devc->buflen - 1;
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if (len > 0) {
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len = serial_read(fd, devc->buf + devc->buflen, len);
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if (len > 0) {
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devc->buflen += len;
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*(devc->buf + devc->buflen) = '\0';
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if (devc->buflen > 0 && *(devc->buf + devc->buflen - 1) == '\n')
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/* End of line */
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receive_line(sdi);
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}
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}
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}
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dispatch(sdi);
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if (devc->num_samples >= devc->limit_samples)
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sdi->driver->dev_acquisition_stop(sdi, cb_data);
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return TRUE;
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}
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static int agdmm_send(const struct sr_dev_inst *sdi, const char *cmd)
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{
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struct dev_context *devc;
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char buf[32];
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devc = sdi->priv;
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sr_spew("agilent-dmm: sending '%s'", cmd);
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strncpy(buf, cmd, 28);
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if (!strncmp(buf, "*IDN?", 5))
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strncat(buf, "\r\n", 32);
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else
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strncat(buf, "\n\r\n", 32);
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if (serial_write(devc->serial->fd, buf, strlen(buf)) == -1) {
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sr_err("agilent-dmm: failed to send: %s", strerror(errno));
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return SR_ERR;
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}
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return SR_OK;
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}
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static int agdmm_ident_send(const struct sr_dev_inst *sdi)
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{
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return agdmm_send(sdi, "*IDN?");
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}
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static int agdmm_ident_recv(const struct sr_dev_inst *sdi, GMatchInfo *match)
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{
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(void)sdi;
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sr_spew("got ident '%s'", g_match_info_get_string(match));
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return SR_OK;
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}
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static int agdmm_stat_send(const struct sr_dev_inst *sdi)
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{
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return agdmm_send(sdi, "STAT?");
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}
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static int agdmm_stat_recv(const struct sr_dev_inst *sdi, GMatchInfo *match)
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{
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sr_spew("got stat '%s'", g_match_info_get_string(match));
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return SR_OK;
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}
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SR_PRIV int agdmm_fetc_send(const struct sr_dev_inst *sdi)
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{
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return agdmm_send(sdi, "FETC?");
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}
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SR_PRIV int agdmm_fetc_recv(const struct sr_dev_inst *sdi, GMatchInfo *match)
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{
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struct dev_context *devc;
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struct sr_datafeed_packet packet;
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struct sr_datafeed_analog analog;
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float fvalue;
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char *mstr, *eptr;
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sr_spew("agilent-dmm: FETC reply '%s'", g_match_info_get_string(match));
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devc = sdi->priv;
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if (devc->cur_mq == -1)
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/* Haven't seen configuration yet, so can't know what
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* the fetched float means. Not really an error, we'll
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* get metadata soon enough. */
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return SR_OK;
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if (!strcmp(g_match_info_get_string(match), "+9.90000000E+37")) {
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/* An invalid measurement shows up on the display as "O.L, but
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* comes through like this. Since comparing 38-digit floats
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* is rather problematic, we'll cut through this here. */
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fvalue = NAN;
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} else {
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mstr = g_match_info_fetch(match, 1);
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fvalue = strtof(mstr, &eptr);
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g_free(mstr);
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if (fvalue == 0.0 && eptr == mstr) {
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sr_err("agilent-dmm: invalid float");
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return SR_ERR;
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}
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if (devc->cur_divider > 0)
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fvalue /= devc->cur_divider;
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}
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memset(&analog, 0, sizeof(struct sr_datafeed_analog));
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analog.mq = devc->cur_mq;
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analog.unit = devc->cur_mq_unit;
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analog.mqflags = devc->cur_mq_flags;
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analog.num_samples = 1;
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analog.data = &fvalue;
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packet.type = SR_DF_ANALOG;
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packet.payload = &analog;
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sr_session_send(devc->cb_data, &packet);
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devc->num_samples++;
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return SR_OK;
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}
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SR_PRIV int agdmm_conf_send(const struct sr_dev_inst *sdi)
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{
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return agdmm_send(sdi, "CONF?");
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}
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SR_PRIV int agdmm_conf_recv(const struct sr_dev_inst *sdi, GMatchInfo *match)
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{
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struct dev_context *devc;
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char *mstr;
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sr_spew("got conf '%s'", g_match_info_get_string(match));
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devc = sdi->priv;
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mstr = g_match_info_fetch(match, 1);
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if (!strcmp(mstr, "V")) {
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devc->cur_mq = SR_MQ_VOLTAGE;
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devc->cur_mq_unit = SR_UNIT_VOLT;
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devc->cur_mq_flags = 0;
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devc->cur_divider = 0;
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} else if(!strcmp(mstr, "MV")) {
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devc->cur_mq = SR_MQ_VOLTAGE;
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devc->cur_mq_unit = SR_UNIT_VOLT;
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devc->cur_mq_flags = 0;
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devc->cur_divider = 1000;
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} else if(!strcmp(mstr, "A")) {
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devc->cur_mq = SR_MQ_CURRENT;
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devc->cur_mq_unit = SR_UNIT_AMPERE;
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devc->cur_mq_flags = 0;
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devc->cur_divider = 0;
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} else if(!strcmp(mstr, "UA")) {
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devc->cur_mq = SR_MQ_CURRENT;
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devc->cur_mq_unit = SR_UNIT_AMPERE;
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devc->cur_mq_flags = 0;
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devc->cur_divider = 1000000;
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} else if(!strcmp(mstr, "FREQ")) {
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devc->cur_mq = SR_MQ_FREQUENCY;
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devc->cur_mq_unit = SR_UNIT_HERTZ;
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devc->cur_mq_flags = 0;
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devc->cur_divider = 0;
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} else if(!strcmp(mstr, "RES")) {
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devc->cur_mq = SR_MQ_RESISTANCE;
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devc->cur_mq_unit = SR_UNIT_OHM;
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devc->cur_mq_flags = 0;
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devc->cur_divider = 0;
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} else if(!strcmp(mstr, "CAP")) {
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devc->cur_mq = SR_MQ_CAPACITANCE;
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devc->cur_mq_unit = SR_UNIT_FARAD;
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devc->cur_mq_flags = 0;
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devc->cur_divider = 0;
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} else if(!strcmp(mstr, "DIOD")) {
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devc->cur_mq = SR_MQ_VOLTAGE;
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devc->cur_mq_unit = SR_UNIT_VOLT;
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devc->cur_mq_flags = SR_MQFLAG_DIODE;
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devc->cur_divider = 0;
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} else
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sr_dbg("agilent-dmm: unknown first argument");
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g_free(mstr);
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if (g_match_info_get_match_count(match) == 3) {
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mstr = g_match_info_fetch(match, 1);
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/* Third value, if present, is always AC or DC. */
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if (!strcmp(mstr, "AC"))
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devc->cur_acdc = 1;
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else if (!strcmp(mstr, "DC"))
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devc->cur_acdc = 2;
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else
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sr_dbg("agilent-dmm: unknown third argument");
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g_free(mstr);
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}
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return SR_OK;
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}
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SR_PRIV int agdmm_switch_recv(const struct sr_dev_inst *sdi, GMatchInfo *match)
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{
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(void)sdi;
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sr_spew("got switch '%s'", g_match_info_get_string(match));
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return SR_OK;
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}
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SR_PRIV const struct agdmm_job u123x_jobs[] = {
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{ 1000, agdmm_ident_send },
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{ 143, agdmm_stat_send },
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{ 1000, agdmm_conf_send },
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{ 143, agdmm_fetc_send },
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{ 0, NULL }
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};
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SR_PRIV const struct agdmm_recv u123x_recvs[] = {
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{ "^\"(\\d\\d.{18}\\d)\"$", agdmm_stat_recv },
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{ "^\\*([0-9])$", agdmm_switch_recv },
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{ "^([-+][0-9]\\.[0-9]{8}E[-+][0-9]{2})$", agdmm_fetc_recv },
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{ "^\"(V|MV|A|UA|FREQ),(\\d),(AC|DC)\"$", agdmm_conf_recv },
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{ "^\"(RES|CAP),(\\d)\"$", agdmm_conf_recv },
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{ "^\"(DIOD)\"$", agdmm_conf_recv },
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{ NULL, NULL }
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};
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