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1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014 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 "libsigrok.h" | |
24 | #include "libsigrok-internal.h" | |
25 | ||
26 | #define LOG_PREFIX "output/bits" | |
27 | ||
28 | #define DEFAULT_SAMPLES_PER_LINE 64 | |
29 | ||
30 | struct context { | |
31 | unsigned int num_enabled_channels; | |
32 | int samples_per_line; | |
33 | int spl_cnt; | |
34 | int trigger; | |
35 | int *channel_index; | |
36 | char **channel_names; | |
37 | GString **lines; | |
38 | GString *header; | |
39 | }; | |
40 | ||
41 | static int init(struct sr_output *o) | |
42 | { | |
43 | struct context *ctx; | |
44 | struct sr_channel *ch; | |
45 | GSList *l; | |
46 | GVariant *gvar; | |
47 | uint64_t samplerate; | |
48 | unsigned int i, j; | |
49 | int spl, num_channels; | |
50 | char *samplerate_s; | |
51 | ||
52 | if (!o || !o->sdi) | |
53 | return SR_ERR_ARG; | |
54 | ctx = g_malloc0(sizeof(struct context)); | |
55 | o->internal = ctx; | |
56 | ctx->trigger = -1; | |
57 | ||
58 | if (o->param && o->param[0]) { | |
59 | if ((spl = strtoul(o->param, NULL, 10)) < 1) | |
60 | return SR_ERR_ARG; | |
61 | } else | |
62 | spl = DEFAULT_SAMPLES_PER_LINE; | |
63 | ctx->samples_per_line = spl; | |
64 | ||
65 | for (l = o->sdi->channels; l; l = l->next) { | |
66 | ch = l->data; | |
67 | if (ch->type != SR_CHANNEL_LOGIC) | |
68 | continue; | |
69 | if (!ch->enabled) | |
70 | continue; | |
71 | ctx->num_enabled_channels++; | |
72 | } | |
73 | ctx->channel_index = g_malloc(sizeof(int) * ctx->num_enabled_channels); | |
74 | ctx->channel_names = g_malloc(sizeof(char *) * ctx->num_enabled_channels); | |
75 | ctx->lines = g_malloc(sizeof(GString *) * ctx->num_enabled_channels); | |
76 | ||
77 | j = 0; | |
78 | for (i = 0, l = o->sdi->channels; l; l = l->next, i++) { | |
79 | ch = l->data; | |
80 | if (ch->type != SR_CHANNEL_LOGIC) | |
81 | continue; | |
82 | if (!ch->enabled) | |
83 | continue; | |
84 | ctx->channel_index[j] = ch->index; | |
85 | ctx->channel_names[j] = ch->name; | |
86 | ctx->lines[j] = g_string_sized_new(80); | |
87 | g_string_printf(ctx->lines[j], "%s:", ch->name); | |
88 | j++; | |
89 | } | |
90 | ||
91 | ctx->header = g_string_sized_new(512); | |
92 | g_string_printf(ctx->header, "%s\n", PACKAGE_STRING); | |
93 | num_channels = g_slist_length(o->sdi->channels); | |
94 | if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE, | |
95 | &gvar) == SR_OK) { | |
96 | samplerate = g_variant_get_uint64(gvar); | |
97 | samplerate_s = sr_samplerate_string(samplerate); | |
98 | g_string_append_printf(ctx->header, "Acquisition with %d/%d channels at %s\n", | |
99 | ctx->num_enabled_channels, num_channels, samplerate_s); | |
100 | g_free(samplerate_s); | |
101 | g_variant_unref(gvar); | |
102 | } | |
103 | ||
104 | return SR_OK; | |
105 | } | |
106 | ||
107 | static int receive(struct sr_output *o, const struct sr_dev_inst *sdi, | |
108 | const struct sr_datafeed_packet *packet, GString **out) | |
109 | { | |
110 | const struct sr_datafeed_logic *logic; | |
111 | struct context *ctx; | |
112 | int idx, offset; | |
113 | uint64_t i, j; | |
114 | gchar *p, c; | |
115 | ||
116 | (void)sdi; | |
117 | ||
118 | *out = NULL; | |
119 | if (!o || !o->sdi) | |
120 | return SR_ERR_ARG; | |
121 | if (!(ctx = o->internal)) | |
122 | return SR_ERR_ARG; | |
123 | ||
124 | switch (packet->type) { | |
125 | case SR_DF_TRIGGER: | |
126 | ctx->trigger = ctx->spl_cnt; | |
127 | break; | |
128 | case SR_DF_LOGIC: | |
129 | if (ctx->header) { | |
130 | /* The header is still here, this must be the first packet. */ | |
131 | *out = ctx->header; | |
132 | ctx->header = NULL; | |
133 | } else | |
134 | *out = g_string_sized_new(512); | |
135 | ||
136 | logic = packet->payload; | |
137 | for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) { | |
138 | ctx->spl_cnt++; | |
139 | for (j = 0; j < ctx->num_enabled_channels; j++) { | |
140 | idx = ctx->channel_index[j]; | |
141 | p = logic->data + i + idx / 8; | |
142 | c = (*p & (1 << (idx % 8))) ? '1' : '0'; | |
143 | g_string_append_c(ctx->lines[j], c); | |
144 | ||
145 | if (ctx->spl_cnt == ctx->samples_per_line) { | |
146 | /* Flush line buffers. */ | |
147 | g_string_append_len(*out, ctx->lines[j]->str, ctx->lines[j]->len); | |
148 | g_string_append_c(*out, '\n'); | |
149 | if (j == ctx->num_enabled_channels - 1 && ctx->trigger > -1) { | |
150 | offset = ctx->trigger + ctx->trigger / 8; | |
151 | g_string_append_printf(*out, "T:%*s^ %d\n", offset, "", ctx->trigger); | |
152 | ctx->trigger = -1; | |
153 | } | |
154 | g_string_printf(ctx->lines[j], "%s:", ctx->channel_names[j]); | |
155 | } else if ((ctx->spl_cnt & 7) == 0) { | |
156 | /* Add a space every 8th bit. */ | |
157 | g_string_append_c(ctx->lines[j], ' '); | |
158 | } | |
159 | } | |
160 | if (ctx->spl_cnt == ctx->samples_per_line) | |
161 | /* Line buffers were already flushed. */ | |
162 | ctx->spl_cnt = 0; | |
163 | } | |
164 | break; | |
165 | case SR_DF_END: | |
166 | if (ctx->spl_cnt) { | |
167 | /* Line buffers need flushing. */ | |
168 | *out = g_string_sized_new(512); | |
169 | for (i = 0; i < ctx->num_enabled_channels; i++) { | |
170 | g_string_append_len(*out, ctx->lines[i]->str, ctx->lines[i]->len); | |
171 | g_string_append_c(*out, '\n'); | |
172 | } | |
173 | } | |
174 | break; | |
175 | } | |
176 | ||
177 | return SR_OK; | |
178 | } | |
179 | ||
180 | static int cleanup(struct sr_output *o) | |
181 | { | |
182 | struct context *ctx; | |
183 | unsigned int i; | |
184 | ||
185 | if (!o) | |
186 | return SR_ERR_ARG; | |
187 | ||
188 | if (!(ctx = o->internal)) | |
189 | return SR_OK; | |
190 | ||
191 | g_free(ctx->header); | |
192 | g_free(ctx->channel_index); | |
193 | g_free(ctx->channel_names); | |
194 | for (i = 0; i < ctx->num_enabled_channels; i++) | |
195 | g_string_free(ctx->lines[i], TRUE); | |
196 | g_free(ctx->lines); | |
197 | if (ctx->header) | |
198 | g_string_free(ctx->header, TRUE); | |
199 | g_free(ctx); | |
200 | o->internal = NULL; | |
201 | ||
202 | return SR_OK; | |
203 | } | |
204 | ||
205 | SR_PRIV struct sr_output_format output_bits = { | |
206 | .id = "bits", | |
207 | .description = "Bits", | |
208 | .init = init, | |
209 | .receive = receive, | |
210 | .cleanup = cleanup, | |
211 | }; |