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e2ad47b5 UH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> | |
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 2 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, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <glib.h> | |
24 | #include <sigrok.h> | |
25 | #include "config.h" | |
26 | ||
27 | struct context { | |
afc8e4de UH |
28 | unsigned int num_enabled_probes; |
29 | unsigned int unitsize; | |
e2ad47b5 UH |
30 | char *probelist[65]; |
31 | char *header; | |
32 | }; | |
33 | ||
34 | const char *gnuplot_header = "\ | |
35 | # Sample data in space-separated columns format usable by gnuplot\n\ | |
36 | #\n\ | |
37 | # Generated by: %s on %s\n\ | |
38 | # Comment: Acquisition with %d/%d probes at %s\n\ | |
39 | # Timescale: %d %s\n\ | |
40 | # Column assignment:\n%s\n"; | |
41 | ||
42 | static int init(struct output *o) | |
43 | { | |
44 | /* Maximum header length */ | |
45 | #define MAX_HEADER_LEN 2048 | |
46 | ||
47 | struct context *ctx; | |
48 | struct probe *probe; | |
49 | GSList *l; | |
50 | uint64_t samplerate; | |
afc8e4de UH |
51 | unsigned int i; |
52 | int b, num_probes; | |
25e7d9b1 UH |
53 | char *c, *samplerate_s; |
54 | char wbuf[1000]; | |
e2ad47b5 UH |
55 | |
56 | ctx = malloc(sizeof(struct context)); | |
57 | if (ctx == NULL) | |
58 | return SIGROK_ERR_MALLOC; | |
59 | o->internal = ctx; | |
60 | ctx->num_enabled_probes = 0; | |
61 | for (l = o->device->probes; l; l = l->next) { | |
62 | probe = l->data; | |
63 | if (probe->enabled) | |
64 | ctx->probelist[ctx->num_enabled_probes++] = probe->name; | |
65 | } | |
66 | ||
67 | ctx->probelist[ctx->num_enabled_probes] = 0; | |
68 | ctx->unitsize = (ctx->num_enabled_probes + 7) / 8; | |
69 | ||
70 | /* TODO: Allow for configuration via o->param. */ | |
71 | ||
72 | ctx->header = calloc(1, MAX_HEADER_LEN + 1); | |
73 | if (ctx->header == NULL) | |
74 | return SIGROK_ERR_MALLOC; | |
75 | num_probes = g_slist_length(o->device->probes); | |
76 | /* TODO: Handle num_probes == 0, too many probes, etc. */ | |
77 | samplerate = *((uint64_t *) o->device->plugin->get_device_info( | |
78 | o->device->plugin_index, DI_CUR_SAMPLERATE)); | |
99c1fc59 | 79 | |
25e7d9b1 | 80 | if ((samplerate_s = sigrok_samplerate_string(samplerate)) == NULL) |
99c1fc59 | 81 | return -1; /* FIXME */ |
e2ad47b5 UH |
82 | |
83 | /* Columns / channels */ | |
84 | wbuf[0] = '\0'; | |
85 | for (i = 0; i < ctx->num_enabled_probes; i++) { | |
86 | c = (char *)&wbuf + strlen((char *)&wbuf); | |
87 | sprintf(c, "# Column %d: channel %s\n", i, ctx->probelist[i]); | |
88 | } | |
89 | ||
90 | /* TODO: date: File or signals? Make y/n configurable. */ | |
91 | /* TODO: Timescale */ | |
92 | b = snprintf(ctx->header, MAX_HEADER_LEN, gnuplot_header, | |
93 | PACKAGE_STRING, "TODO", ctx->num_enabled_probes, | |
25e7d9b1 UH |
94 | num_probes, samplerate_s, 1, "ns", (char *)&wbuf); |
95 | ||
96 | free(samplerate_s); | |
e2ad47b5 UH |
97 | |
98 | /* TODO: Handle snprintf errors. */ | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | static int event(struct output *o, int event_type, char **data_out, | |
104 | uint64_t *length_out) | |
105 | { | |
106 | struct context *ctx; | |
107 | char *outbuf; | |
108 | int outlen = 1; /* FIXME */ | |
109 | ||
110 | ctx = o->internal; | |
99c1fc59 | 111 | switch (event_type) { |
e2ad47b5 UH |
112 | case DF_TRIGGER: |
113 | break; | |
114 | case DF_END: | |
99c1fc59 | 115 | outbuf = calloc(1, 1); /* FIXME */ |
e2ad47b5 UH |
116 | if (outbuf == NULL) |
117 | return SIGROK_ERR_MALLOC; | |
118 | *data_out = outbuf; | |
119 | *length_out = outlen; | |
120 | free(o->internal); | |
121 | o->internal = NULL; | |
122 | break; | |
123 | } | |
124 | ||
125 | return SIGROK_OK; | |
126 | } | |
127 | ||
128 | static int data(struct output *o, char *data_in, uint64_t length_in, | |
129 | char **data_out, uint64_t *length_out) | |
130 | { | |
131 | struct context *ctx; | |
afc8e4de | 132 | unsigned int offset, outsize, p, curbit; |
e2ad47b5 UH |
133 | uint64_t sample, count = 0; |
134 | char *outbuf, *c; | |
135 | ||
136 | ctx = o->internal; | |
e273a904 HE |
137 | |
138 | outsize = 0; | |
139 | if (ctx->header) | |
140 | outsize = strlen(ctx->header); | |
99c1fc59 | 141 | outbuf = calloc(1, outsize + 1 + 10000); /* FIXME: Use realloc(). */ |
e2ad47b5 UH |
142 | if (outbuf == NULL) |
143 | return SIGROK_ERR_MALLOC; | |
144 | if (ctx->header) { | |
145 | /* The header is still here, this must be the first packet. */ | |
146 | strncpy(outbuf, ctx->header, outsize); | |
147 | free(ctx->header); | |
148 | ctx->header = NULL; | |
149 | } else { | |
150 | outbuf[0] = 0; | |
151 | } | |
152 | ||
153 | /* TODO: Are disabled probes handled correctly? */ | |
154 | ||
155 | for (offset = 0; offset <= length_in - ctx->unitsize; | |
99c1fc59 | 156 | offset += ctx->unitsize) { |
e2ad47b5 UH |
157 | memcpy(&sample, data_in + offset, ctx->unitsize); |
158 | ||
159 | /* The first column is a counter (needed for gnuplot). */ | |
160 | c = outbuf + strlen(outbuf); | |
99c1fc59 | 161 | sprintf(c, "%" PRIu64 "\t\t", count++); |
e2ad47b5 UH |
162 | |
163 | /* The next columns are the values of all channels. */ | |
164 | for (p = 0; p < ctx->num_enabled_probes; p++) { | |
165 | curbit = (sample & ((uint64_t) (1 << p))) != 0; | |
166 | c = outbuf + strlen(outbuf); | |
167 | sprintf(c, "%d ", curbit); | |
168 | } | |
169 | ||
170 | c = outbuf + strlen(outbuf); | |
171 | sprintf(c, "\n"); | |
172 | ||
173 | /* TODO: realloc() if strlen(outbuf) is almost "full"... */ | |
174 | } | |
175 | ||
176 | *data_out = outbuf; | |
177 | *length_out = strlen(outbuf); | |
178 | ||
179 | return SIGROK_OK; | |
180 | } | |
181 | ||
182 | struct output_format output_gnuplot = { | |
183 | "gnuplot", | |
184 | "Gnuplot", | |
185 | init, | |
186 | data, | |
187 | event, | |
188 | }; |