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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 | ||
25 | SR_PRIV int bv_get_value(float *out, const struct binary_value_spec *spec, const void *data, size_t length) | |
26 | { | |
27 | float value; | |
28 | ||
29 | if (!out || !spec || !data) | |
30 | return SR_ERR_ARG; | |
31 | ||
32 | #define VALUE_TYPE(T, R, L) \ | |
33 | case T: \ | |
34 | if (spec->offset + (L) > length) \ | |
35 | return SR_ERR_DATA; \ | |
36 | value = R(data + spec->offset); \ | |
37 | break | |
38 | ||
39 | switch (spec->type) { | |
40 | VALUE_TYPE(BVT_UINT8, R8, 1); | |
41 | ||
42 | VALUE_TYPE(BVT_BE_UINT16, RB16, 2); | |
43 | VALUE_TYPE(BVT_BE_UINT32, RB32, 4); | |
44 | VALUE_TYPE(BVT_BE_UINT64, RB64, 8); | |
45 | VALUE_TYPE(BVT_BE_FLOAT, RBFL, 4); | |
46 | ||
47 | VALUE_TYPE(BVT_LE_UINT16, RL16, 2); | |
48 | VALUE_TYPE(BVT_LE_UINT32, RL32, 4); | |
49 | VALUE_TYPE(BVT_LE_UINT64, RL64, 8); | |
50 | VALUE_TYPE(BVT_LE_FLOAT, RLFL, 4); | |
51 | ||
52 | default: | |
53 | return SR_ERR_ARG; | |
54 | } | |
55 | ||
56 | #undef VALUE_TYPE | |
57 | ||
58 | *out = value * spec->scale; | |
59 | return SR_OK; | |
60 | } | |
61 | ||
62 | SR_PRIV int bv_send_analog_channel(const struct sr_dev_inst *sdi, struct sr_channel *ch, | |
63 | const struct binary_analog_channel *bac, const void *data, size_t length) | |
64 | { | |
65 | int err; | |
66 | struct sr_analog_encoding encoding; | |
67 | struct sr_analog_meaning meaning; | |
68 | struct sr_analog_spec spec; | |
69 | struct sr_datafeed_analog analog; | |
70 | struct sr_datafeed_packet packet = { | |
71 | .type = SR_DF_ANALOG, | |
72 | .payload = &analog, | |
73 | }; | |
74 | float value; | |
75 | ||
76 | err = bv_get_value(&value, &bac->spec, data, length); | |
77 | if (err != SR_OK) | |
78 | goto err_out; | |
79 | ||
80 | err = sr_analog_init(&analog, &encoding, &meaning, &spec, bac->digits); | |
81 | if (err != SR_OK) | |
82 | goto err_out; | |
83 | ||
84 | meaning.mq = bac->mq; | |
85 | meaning.unit = bac->unit; | |
86 | meaning.mqflags = 0; | |
87 | meaning.channels = g_slist_append(NULL, ch); | |
18698b40 AS |
88 | |
89 | spec.spec_digits = bac->digits; | |
90 | ||
91 | analog.data = &value; | |
92 | analog.num_samples = 1; | |
93 | ||
94 | err = sr_session_send(sdi, &packet); | |
95 | if (err != SR_OK) | |
96 | goto err_free; | |
97 | ||
98 | return SR_OK; | |
99 | ||
100 | err_free: | |
101 | g_slist_free(meaning.channels); | |
102 | ||
103 | err_out: | |
104 | return err; | |
105 | } |