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hp-3457a: Implement AC, ACDC, and four-wire resistance modes
[libsigrok.git] / src / hardware / hp-3457a / protocol.h
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1/*
2 * This file is part of the libsigrok project.
3 *
4 * Copyright (C) 2016 Alexandru Gagniuc <mr.nuke.me@gmail.com>
5 *
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.
10 *
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.
15 *
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/>.
18 */
19
20#ifndef LIBSIGROK_HARDWARE_HP_3457A_PROTOCOL_H
21#define LIBSIGROK_HARDWARE_HP_3457A_PROTOCOL_H
22
23#include <stdint.h>
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24#include "libsigrok-internal.h"
25
26#define LOG_PREFIX "hp-3457a"
27
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28/* Information about the rear card option currently installed. */
29enum card_type {
30 CARD_UNKNOWN,
31 REAR_TERMINALS,
32 HP_44491A,
33 HP_44492A,
34};
35
36struct rear_card_info {
37 unsigned int card_id;
38 enum card_type type;
39 const char *name;
40 const char *cg_name;
41};
42
43/* Possible states in an acquisition. */
44enum acquisition_state {
45 ACQ_TRIGGERED_MEASUREMENT,
46 ACQ_REQUESTED_HIRES,
47 ACQ_REQUESTED_RANGE,
48 ACQ_GOT_MEASUREMENT,
49};
50
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51/** Private, per-device-instance driver context. */
52struct dev_context {
53 /* Model-specific information */
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54 /* Information about rear card option, or NULL if unknown */
55 const struct rear_card_info *rear_card;
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56
57 /* Acquisition settings */
db23af7f 58 enum sr_mq measurement_mq;
2c04f943 59 enum sr_mqflag measurement_mq_flags;
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60 enum sr_unit measurement_unit;
61 uint64_t limit_samples;
62 float nplc;
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63
64 /* Operational state */
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65 enum acquisition_state acq_state;
66 uint64_t num_samples;
67 double base_measurement;
68 double hires_register;
69 double measurement_range;
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70};
71
db23af7f 72SR_PRIV const struct rear_card_info *hp_3457a_probe_rear_card(struct sr_scpi_dev_inst *scpi);
00b2a092 73SR_PRIV int hp_3457a_receive_data(int fd, int revents, void *cb_data);
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74SR_PRIV int hp_3457a_set_mq(const struct sr_dev_inst *sdi, enum sr_mq mq,
75 enum sr_mqflag mq_flags);
db23af7f 76SR_PRIV int hp_3457a_set_nplc(const struct sr_dev_inst *sdi, float nplc);
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77
78#endif