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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.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 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <glib.h> | |
23 | #include "config.h" | |
24 | #include "libsigrok.h" | |
25 | #include "libsigrok-internal.h" | |
26 | #include <math.h> | |
27 | ||
28 | struct context { | |
29 | int num_enabled_probes; | |
30 | GPtrArray *probelist; | |
31 | GString *out; | |
32 | }; | |
33 | ||
34 | ||
35 | static int init(struct sr_output *o) | |
36 | { | |
37 | struct context *ctx; | |
38 | struct sr_probe *probe; | |
39 | GSList *l; | |
40 | ||
41 | sr_spew("output/analog: initializing"); | |
42 | if (!o || !o->sdi) | |
43 | return SR_ERR_ARG; | |
44 | ||
45 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) | |
46 | return SR_ERR_MALLOC; | |
47 | o->internal = ctx; | |
48 | ||
49 | /* Get the number of probes and their names. */ | |
50 | ctx->probelist = g_ptr_array_new(); | |
51 | for (l = o->sdi->probes; l; l = l->next) { | |
52 | probe = l->data; | |
53 | if (!probe || !probe->enabled) | |
54 | continue; | |
55 | g_ptr_array_add(ctx->probelist, probe->name); | |
56 | ctx->num_enabled_probes++; | |
57 | } | |
58 | ||
59 | ctx->out = g_string_sized_new(512); | |
60 | ||
61 | return SR_OK; | |
62 | } | |
63 | ||
64 | static void si_printf(float value, GString *out, char *unitstr) | |
65 | { | |
66 | ||
67 | if (value > 1000000000L) | |
68 | g_string_append_printf(out, "%f G%s", value / 1000000000L, unitstr); | |
69 | else if (value > 1000000) | |
70 | g_string_append_printf(out, "%f M%s", value / 1000000, unitstr); | |
71 | else if (value > 1000) | |
72 | g_string_append_printf(out, "%f k%s", value / 1000, unitstr); | |
73 | else if (value < 0.000000000001) | |
74 | g_string_append_printf(out, "%f p%s", value * 1000000000000, unitstr); | |
75 | else if (value < 0.000000001) | |
76 | g_string_append_printf(out, "%f n%s", value * 1000000000, unitstr); | |
77 | else if (value < 0.000001) | |
78 | g_string_append_printf(out, "%f u%s", value * 1000000, unitstr); | |
79 | else if (value < 0.001) | |
80 | g_string_append_printf(out, "%f m%s", value * 1000, unitstr); | |
81 | else | |
82 | g_string_append_printf(out, "%f %s", value, unitstr); | |
83 | ||
84 | } | |
85 | ||
86 | static void fancyprint(int unit, int mqflags, float value, GString *out) | |
87 | { | |
88 | ||
89 | switch (unit) { | |
90 | case SR_UNIT_VOLT: | |
91 | si_printf(value, out, "V"); | |
92 | break; | |
93 | case SR_UNIT_AMPERE: | |
94 | si_printf(value, out, "A"); | |
95 | break; | |
96 | case SR_UNIT_OHM: | |
97 | si_printf(value, out, ""); | |
98 | g_string_append_unichar(out, 0x2126); | |
99 | break; | |
100 | case SR_UNIT_FARAD: | |
101 | si_printf(value, out, "F"); | |
102 | break; | |
103 | case SR_UNIT_KELVIN: | |
104 | si_printf(value, out, "K"); | |
105 | break; | |
106 | case SR_UNIT_CELSIUS: | |
107 | si_printf(value, out, ""); | |
108 | g_string_append_unichar(out, 0x00b0); | |
109 | g_string_append_c(out, 'C'); | |
110 | break; | |
111 | case SR_UNIT_FAHRENHEIT: | |
112 | si_printf(value, out, ""); | |
113 | g_string_append_unichar(out, 0x00b0); | |
114 | g_string_append_c(out, 'F'); | |
115 | break; | |
116 | case SR_UNIT_HERTZ: | |
117 | si_printf(value, out, "Hz"); | |
118 | break; | |
119 | case SR_UNIT_PERCENTAGE: | |
120 | g_string_append_printf(out, "%f%%", value); | |
121 | break; | |
122 | case SR_UNIT_BOOLEAN: | |
123 | if (value > 0) | |
124 | g_string_append_printf(out, "TRUE"); | |
125 | else | |
126 | g_string_append_printf(out, "FALSE"); | |
127 | break; | |
128 | } | |
129 | if (mqflags & SR_MQFLAG_AC) | |
130 | g_string_append_printf(out, " AC"); | |
131 | else if (mqflags & SR_MQFLAG_DC) | |
132 | g_string_append_printf(out, " DC"); | |
133 | g_string_append_c(out, '\n'); | |
134 | ||
135 | } | |
136 | ||
137 | static GString *recv(struct sr_output *o, const struct sr_dev_inst *sdi, | |
138 | struct sr_datafeed_packet *packet) | |
139 | { | |
140 | struct sr_datafeed_analog *analog; | |
141 | struct context *ctx; | |
142 | float *fdata; | |
143 | int i, j; | |
144 | ||
145 | if (!o || !o->sdi) | |
146 | return NULL; | |
147 | ctx = o->internal; | |
148 | ||
149 | g_string_set_size(ctx->out, 0); | |
150 | switch (packet->type) { | |
151 | case SR_DF_HEADER: | |
152 | break; | |
153 | case SR_DF_FRAME_BEGIN: | |
154 | g_string_append_printf(ctx->out, "FRAME-BEGIN\n"); | |
155 | break; | |
156 | case SR_DF_FRAME_END: | |
157 | g_string_append_printf(ctx->out, "FRAME-END\n"); | |
158 | break; | |
159 | case SR_DF_ANALOG: | |
160 | analog = packet->payload; | |
161 | fdata = (float *)analog->data; | |
162 | for (i = 0; i < analog->num_samples; i++) { | |
163 | for (j = 0; j < ctx->num_enabled_probes; j++) { | |
164 | g_string_append_printf(ctx->out, "%s: ", | |
165 | (char *)g_ptr_array_index(ctx->probelist, j)); | |
166 | fancyprint(analog->unit, analog->mqflags, | |
167 | fdata[i + j], ctx->out); | |
168 | } | |
169 | } | |
170 | break; | |
171 | } | |
172 | ||
173 | return ctx->out; | |
174 | } | |
175 | ||
176 | static int cleanup(struct sr_output *o) | |
177 | { | |
178 | struct context *ctx; | |
179 | ||
180 | if (!o || !o->sdi) | |
181 | return SR_ERR_ARG; | |
182 | ctx = o->internal; | |
183 | ||
184 | g_ptr_array_free(ctx->probelist, 1); | |
185 | g_string_free(ctx->out, 1); | |
186 | g_free(ctx); | |
187 | o->internal = NULL; | |
188 | ||
189 | return SR_OK; | |
190 | } | |
191 | ||
192 | ||
193 | SR_PRIV struct sr_output_format output_analog = { | |
194 | .id = "analog", | |
195 | .description = "Analog data", | |
196 | .df_type = SR_DF_ANALOG, | |
197 | .init = init, | |
198 | .recv = recv, | |
199 | .cleanup = cleanup | |
200 | }; |