src/output/hex.c

   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/hex"
  27
  28 #define DEFAULT_SAMPLES_PER_LINE 192
  29
  30 struct context {
  31         unsigned int num_enabled_channels;
  32         int samples_per_line;
  33         int bit_cnt;
  34         int spl_cnt;
  35         int trigger;
  36         uint64_t samplerate;
  37         int *channel_index;
  38         char **channel_names;
  39         char **line_values;
  40         uint8_t *sample_buf;
  41         gboolean header_done;
  42         GString **lines;
  43 };
  44
  45 static int init(struct sr_output *o, GHashTable *options)
  46 {
  47         struct context *ctx;
  48         struct sr_channel *ch;
  49         GSList *l;
  50         GHashTableIter iter;
  51         gpointer key, value;
  52         unsigned int i, j;
  53         uint32_t spl;
  54
  55         if (!o || !o->sdi)
  56                 return SR_ERR_ARG;
  57
  58         spl = DEFAULT_SAMPLES_PER_LINE;
  59         if (options) {
  60                 g_hash_table_iter_init(&iter, options);
  61                 while (g_hash_table_iter_next(&iter, &key, &value)) {
  62                         if (!strcmp(key, "width")) {
  63                                 if (!g_variant_is_of_type(value, G_VARIANT_TYPE_UINT32)) {
  64                                         sr_err("Invalid type for 'width' option.");
  65                                         return SR_ERR_ARG;
  66                                 }
  67                                 if (!(spl = g_variant_get_uint32(value))) {
  68                                         sr_err("Invalid width.");
  69                                         return SR_ERR_ARG;
  70                                 }
  71                         } else {
  72                                 sr_err("Unknown option '%s'.", key);
  73                                 return SR_ERR_ARG;
  74                         }
  75                 }
  76         }
  77
  78         ctx = g_malloc0(sizeof(struct context));
  79         o->priv = ctx;
  80         ctx->trigger = -1;
  81         ctx->samples_per_line = spl;
  82
  83         for (l = o->sdi->channels; l; l = l->next) {
  84                 ch = l->data;
  85                 if (ch->type != SR_CHANNEL_LOGIC)
  86                         continue;
  87                 if (!ch->enabled)
  88                         continue;
  89                 ctx->num_enabled_channels++;
  90         }
  91         ctx->channel_index = g_malloc(sizeof(int) * ctx->num_enabled_channels);
  92         ctx->channel_names = g_malloc(sizeof(char *) * ctx->num_enabled_channels);
  93         ctx->lines = g_malloc(sizeof(GString *) * ctx->num_enabled_channels);
  94         ctx->sample_buf = g_malloc(ctx->num_enabled_channels);
  95
  96         j = 0;
  97         for (i = 0, l = o->sdi->channels; l; l = l->next, i++) {
  98                 ch = l->data;
  99                 if (ch->type != SR_CHANNEL_LOGIC)
 100                         continue;
 101                 if (!ch->enabled)
 102                         continue;
 103                 ctx->channel_index[j] = ch->index;
 104                 ctx->channel_names[j] = ch->name;
 105                 ctx->lines[j] = g_string_sized_new(80);
 106                 ctx->sample_buf[j] = 0;
 107                 g_string_printf(ctx->lines[j], "%s:", ch->name);
 108                 j++;
 109         }
 110
 111         return SR_OK;
 112 }
 113
 114 static GString *gen_header(const struct sr_output *o)
 115 {
 116         struct context *ctx;
 117         GVariant *gvar;
 118         GString *header;
 119         int num_channels;
 120         char *samplerate_s;
 121
 122         ctx = o->priv;
 123         if (ctx->samplerate == 0) {
 124                 if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE,
 125                                 &gvar) == SR_OK) {
 126                         ctx->samplerate = g_variant_get_uint64(gvar);
 127                         g_variant_unref(gvar);
 128                 }
 129         }
 130
 131         header = g_string_sized_new(512);
 132         g_string_printf(header, "%s\n", PACKAGE_STRING);
 133         num_channels = g_slist_length(o->sdi->channels);
 134         g_string_append_printf(header, "Acquisition with %d/%d channels",
 135                         ctx->num_enabled_channels, num_channels);
 136         if (ctx->samplerate != 0) {
 137                 samplerate_s = sr_samplerate_string(ctx->samplerate);
 138                 g_string_append_printf(header, " at %s", samplerate_s);
 139                 g_free(samplerate_s);
 140         }
 141         g_string_append_printf(header, "\n");
 142
 143         return header;
 144 }
 145
 146 static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet,
 147                 GString **out)
 148 {
 149         const struct sr_datafeed_meta *meta;
 150         const struct sr_datafeed_logic *logic;
 151         const struct sr_config *src;
 152         GSList *l;
 153         struct context *ctx;
 154         int idx, pos, offset;
 155         uint64_t i, j;
 156         gchar *p;
 157
 158         *out = NULL;
 159         if (!o || !o->sdi)
 160                 return SR_ERR_ARG;
 161         if (!(ctx = o->priv))
 162                 return SR_ERR_ARG;
 163
 164         switch (packet->type) {
 165         case SR_DF_META:
 166                 meta = packet->payload;
 167                 for (l = meta->config; l; l = l->next) {
 168                         src = l->data;
 169                         if (src->key != SR_CONF_SAMPLERATE)
 170                                 continue;
 171                         ctx->samplerate = g_variant_get_uint64(src->data);
 172                 }
 173                 break;
 174         case SR_DF_TRIGGER:
 175                 ctx->trigger = ctx->spl_cnt;
 176                 break;
 177         case SR_DF_LOGIC:
 178                 if (!ctx->header_done) {
 179                         *out = gen_header(o);
 180                         ctx->header_done = TRUE;
 181                 } else
 182                         *out = g_string_sized_new(512);
 183
 184                 logic = packet->payload;
 185                 for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) {
 186                         ctx->spl_cnt++;
 187                         pos = ctx->spl_cnt & 7;
 188                         for (j = 0; j < ctx->num_enabled_channels; j++) {
 189                                 idx = ctx->channel_index[j];
 190                                 p = logic->data + i + idx / 8;
 191                                 ctx->sample_buf[j] <<= 1;
 192                                 if (*p & (1 << (idx % 8)))
 193                                         ctx->sample_buf[j] |= 1;
 194                                 if (ctx->spl_cnt && pos == 0) {
 195                                         /* Buffered a byte's worth, output hex. */
 196                                         g_string_append_printf(ctx->lines[j], "%.2x ",
 197                                                         ctx->sample_buf[j]);
 198                                         ctx->sample_buf[j] = 0;
 199                                 }
 200
 201                                 if (ctx->spl_cnt == ctx->samples_per_line) {
 202                                         /* Flush line buffers. */
 203                                         g_string_append_len(*out, ctx->lines[j]->str, ctx->lines[j]->len);
 204                                         g_string_append_c(*out, '\n');
 205                                         if (j == ctx->num_enabled_channels  - 1 && ctx->trigger > -1) {
 206                                                 offset = ctx->trigger + ctx->trigger / 8;
 207                                                 g_string_append_printf(*out, "T:%*s^ %d\n", offset, "", ctx->trigger);
 208                                                 ctx->trigger = -1;
 209                                         }
 210                                         g_string_printf(ctx->lines[j], "%s:", ctx->channel_names[j]);
 211                                 }
 212                         }
 213                         if (ctx->spl_cnt == ctx->samples_per_line)
 214                                 /* Line buffers were already flushed. */
 215                                 ctx->spl_cnt = 0;
 216                 }
 217                 break;
 218         case SR_DF_END:
 219                 if (ctx->spl_cnt) {
 220                         /* Line buffers need flushing. */
 221                         *out = g_string_sized_new(512);
 222                         for (i = 0; i < ctx->num_enabled_channels; i++) {
 223                                 if (ctx->spl_cnt & 7)
 224                                         g_string_append_printf(ctx->lines[i], "%.2x ",
 225                                                         ctx->sample_buf[i] << (8 - (ctx->spl_cnt & 7)));
 226                                 g_string_append_len(*out, ctx->lines[i]->str, ctx->lines[i]->len);
 227                                 g_string_append_c(*out, '\n');
 228                         }
 229                 }
 230                 break;
 231         }
 232
 233         return SR_OK;
 234 }
 235
 236 static int cleanup(struct sr_output *o)
 237 {
 238         struct context *ctx;
 239         unsigned int i;
 240
 241         if (!o)
 242                 return SR_ERR_ARG;
 243
 244         if (!(ctx = o->priv))
 245                 return SR_OK;
 246
 247         g_free(ctx->channel_index);
 248         g_free(ctx->sample_buf);
 249         g_free(ctx->channel_names);
 250         for (i = 0; i < ctx->num_enabled_channels; i++)
 251                 g_string_free(ctx->lines[i], TRUE);
 252         g_free(ctx->lines);
 253         g_free(ctx);
 254         o->priv = NULL;
 255
 256         return SR_OK;
 257 }
 258
 259 static struct sr_option options[] = {
 260         { "width", "Width", "Number of samples per line", NULL, NULL },
 261         { 0 }
 262 };
 263
 264 static struct sr_option *get_options(gboolean cached)
 265 {
 266         if (cached)
 267                 return options;
 268
 269         options[0].def = g_variant_new_uint32(DEFAULT_SAMPLES_PER_LINE);
 270         g_variant_ref_sink(options[0].def);
 271
 272         return options;
 273 }
 274
 275 SR_PRIV struct sr_output_module output_hex = {
 276         .id = "hex",
 277         .name = "Hexadecimal",
 278         .desc = "Hexadecimal digits",
 279         .options = get_options,
 280         .init = init,
 281         .receive = receive,
 282         .cleanup = cleanup,
 283 };
 284