2 * This file is part of the libsigrok project.
4 * Copyright (C) 2014 Bert Vermeulen <bert@biot.com>
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.
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.
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/>.
23 #include "libsigrok.h"
24 #include "libsigrok-internal.h"
26 #define LOG_PREFIX "output/bits"
28 #define DEFAULT_SAMPLES_PER_LINE 64
31 unsigned int num_enabled_channels;
42 static int init(struct sr_output *o)
45 struct sr_channel *ch;
55 spl = DEFAULT_SAMPLES_PER_LINE;
56 g_hash_table_iter_init(&iter, o->params);
57 while (g_hash_table_iter_next(&iter, &key, &value)) {
58 if (!strcmp(key, "width")) {
59 if ((spl = strtoul(value, NULL, 10)) < 1) {
60 sr_err("Invalid width.");
64 sr_err("Unknown parameter '%s'.", key);
69 ctx = g_malloc0(sizeof(struct context));
72 ctx->samples_per_line = spl;
74 for (l = o->sdi->channels; l; l = l->next) {
76 if (ch->type != SR_CHANNEL_LOGIC)
80 ctx->num_enabled_channels++;
82 ctx->channel_index = g_malloc(sizeof(int) * ctx->num_enabled_channels);
83 ctx->channel_names = g_malloc(sizeof(char *) * ctx->num_enabled_channels);
84 ctx->lines = g_malloc(sizeof(GString *) * ctx->num_enabled_channels);
87 for (i = 0, l = o->sdi->channels; l; l = l->next, i++) {
89 if (ch->type != SR_CHANNEL_LOGIC)
93 ctx->channel_index[j] = ch->index;
94 ctx->channel_names[j] = ch->name;
95 ctx->lines[j] = g_string_sized_new(80);
96 g_string_printf(ctx->lines[j], "%s:", ch->name);
103 static GString *gen_header(struct sr_output *o)
112 if (ctx->samplerate == 0) {
113 if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE,
115 ctx->samplerate = g_variant_get_uint64(gvar);
116 g_variant_unref(gvar);
120 header = g_string_sized_new(512);
121 g_string_printf(header, "%s\n", PACKAGE_STRING);
122 num_channels = g_slist_length(o->sdi->channels);
123 g_string_append_printf(header, "Acquisition with %d/%d channels",
124 ctx->num_enabled_channels, num_channels);
125 if (ctx->samplerate != 0) {
126 samplerate_s = sr_samplerate_string(ctx->samplerate);
127 g_string_append_printf(header, " at %s", samplerate_s);
128 g_free(samplerate_s);
130 g_string_append_printf(header, "\n");
135 static int receive(struct sr_output *o, const struct sr_datafeed_packet *packet,
138 const struct sr_datafeed_meta *meta;
139 const struct sr_datafeed_logic *logic;
140 const struct sr_config *src;
150 if (!(ctx = o->internal))
153 switch (packet->type) {
155 meta = packet->payload;
156 for (l = meta->config; l; l = l->next) {
158 if (src->key != SR_CONF_SAMPLERATE)
160 ctx->samplerate = g_variant_get_uint64(src->data);
164 ctx->trigger = ctx->spl_cnt;
167 if (!ctx->header_done) {
168 *out = gen_header(o);
169 ctx->header_done = TRUE;
171 *out = g_string_sized_new(512);
173 logic = packet->payload;
174 for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) {
176 for (j = 0; j < ctx->num_enabled_channels; j++) {
177 idx = ctx->channel_index[j];
178 p = logic->data + i + idx / 8;
179 c = (*p & (1 << (idx % 8))) ? '1' : '0';
180 g_string_append_c(ctx->lines[j], c);
182 if (ctx->spl_cnt == ctx->samples_per_line) {
183 /* Flush line buffers. */
184 g_string_append_len(*out, ctx->lines[j]->str, ctx->lines[j]->len);
185 g_string_append_c(*out, '\n');
186 if (j == ctx->num_enabled_channels - 1 && ctx->trigger > -1) {
187 offset = ctx->trigger + ctx->trigger / 8;
188 g_string_append_printf(*out, "T:%*s^ %d\n", offset, "", ctx->trigger);
191 g_string_printf(ctx->lines[j], "%s:", ctx->channel_names[j]);
192 } else if ((ctx->spl_cnt & 7) == 0) {
193 /* Add a space every 8th bit. */
194 g_string_append_c(ctx->lines[j], ' ');
197 if (ctx->spl_cnt == ctx->samples_per_line)
198 /* Line buffers were already flushed. */
204 /* Line buffers need flushing. */
205 *out = g_string_sized_new(512);
206 for (i = 0; i < ctx->num_enabled_channels; i++) {
207 g_string_append_len(*out, ctx->lines[i]->str, ctx->lines[i]->len);
208 g_string_append_c(*out, '\n');
217 static int cleanup(struct sr_output *o)
225 if (!(ctx = o->internal))
228 g_free(ctx->channel_index);
229 g_free(ctx->channel_names);
230 for (i = 0; i < ctx->num_enabled_channels; i++)
231 g_string_free(ctx->lines[i], TRUE);
239 SR_PRIV struct sr_output_format output_bits = {
241 .description = "Bits",