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18698b40 AS |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2020 Andreas Sandberg <andreas@sandberg.pp.se> | |
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 | #include <config.h> | |
21 | #include <glib.h> | |
22 | #include <libsigrok/libsigrok.h> | |
23 | #include "libsigrok-internal.h" | |
24 | ||
01671e56 GS |
25 | SR_PRIV int bv_get_value(float *out, const struct binary_value_spec *spec, |
26 | const void *data, size_t length) | |
18698b40 AS |
27 | { |
28 | float value; | |
29 | ||
30 | if (!out || !spec || !data) | |
31 | return SR_ERR_ARG; | |
32 | ||
33 | #define VALUE_TYPE(T, R, L) \ | |
34 | case T: \ | |
35 | if (spec->offset + (L) > length) \ | |
36 | return SR_ERR_DATA; \ | |
37 | value = R(data + spec->offset); \ | |
38 | break | |
39 | ||
40 | switch (spec->type) { | |
d65f51bf | 41 | VALUE_TYPE(BVT_UINT8, R8, sizeof(uint8_t)); |
18698b40 | 42 | |
d65f51bf GS |
43 | VALUE_TYPE(BVT_BE_UINT16, RB16, sizeof(uint16_t)); |
44 | VALUE_TYPE(BVT_BE_UINT32, RB32, sizeof(uint32_t)); | |
45 | VALUE_TYPE(BVT_BE_UINT64, RB64, sizeof(uint64_t)); | |
46 | VALUE_TYPE(BVT_BE_FLOAT, RBFL, sizeof(float)); | |
18698b40 | 47 | |
d65f51bf GS |
48 | VALUE_TYPE(BVT_LE_UINT16, RL16, sizeof(uint16_t)); |
49 | VALUE_TYPE(BVT_LE_UINT32, RL32, sizeof(uint32_t)); | |
50 | VALUE_TYPE(BVT_LE_UINT64, RL64, sizeof(uint64_t)); | |
51 | VALUE_TYPE(BVT_LE_FLOAT, RLFL, sizeof(float)); | |
18698b40 AS |
52 | |
53 | default: | |
54 | return SR_ERR_ARG; | |
55 | } | |
56 | ||
57 | #undef VALUE_TYPE | |
58 | ||
59 | *out = value * spec->scale; | |
60 | return SR_OK; | |
61 | } | |
62 | ||
01671e56 GS |
63 | SR_PRIV int bv_send_analog_channel(const struct sr_dev_inst *sdi, |
64 | struct sr_channel *ch, const struct binary_analog_channel *bac, | |
65 | const void *data, size_t length) | |
18698b40 AS |
66 | { |
67 | int err; | |
68 | struct sr_analog_encoding encoding; | |
69 | struct sr_analog_meaning meaning; | |
70 | struct sr_analog_spec spec; | |
71 | struct sr_datafeed_analog analog; | |
72 | struct sr_datafeed_packet packet = { | |
73 | .type = SR_DF_ANALOG, | |
74 | .payload = &analog, | |
75 | }; | |
76 | float value; | |
77 | ||
78 | err = bv_get_value(&value, &bac->spec, data, length); | |
79 | if (err != SR_OK) | |
80 | goto err_out; | |
81 | ||
82 | err = sr_analog_init(&analog, &encoding, &meaning, &spec, bac->digits); | |
83 | if (err != SR_OK) | |
84 | goto err_out; | |
85 | ||
86 | meaning.mq = bac->mq; | |
87 | meaning.unit = bac->unit; | |
88 | meaning.mqflags = 0; | |
89 | meaning.channels = g_slist_append(NULL, ch); | |
18698b40 AS |
90 | |
91 | spec.spec_digits = bac->digits; | |
92 | ||
93 | analog.data = &value; | |
94 | analog.num_samples = 1; | |
95 | ||
96 | err = sr_session_send(sdi, &packet); | |
97 | if (err != SR_OK) | |
98 | goto err_free; | |
99 | ||
100 | return SR_OK; | |
101 | ||
102 | err_free: | |
103 | g_slist_free(meaning.channels); | |
104 | ||
105 | err_out: | |
106 | return err; | |
107 | } |