libsigrokdecode
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sigrokdecode.h
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1 /*
2  * This file is part of the sigrok project.
3  *
4  * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
5  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #ifndef LIBSIGROKDECODE_SIGROKDECODE_H
23 #define LIBSIGROKDECODE_SIGROKDECODE_H
24 
25 #include <Python.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */
26 #include <stdint.h>
27 #include <glib.h>
28 
29 #ifdef __cplusplus
30 extern "C" {
31 #endif
32 
33 /*
34  * Package version macros (can be used for conditional compilation).
35  */
36 
37 /** The libsigrokdecode package 'major' version number. */
38 #define SRD_PACKAGE_VERSION_MAJOR 0
39 
40 /** The libsigrokdecode package 'minor' version number. */
41 #define SRD_PACKAGE_VERSION_MINOR 1
42 
43 /** The libsigrokdecode package 'micro' version number. */
44 #define SRD_PACKAGE_VERSION_MICRO 1
45 
46 /** The libsigrokdecode package version ("major.minor.micro") as string. */
47 #define SRD_PACKAGE_VERSION_STRING "0.1.1"
48 
49 /*
50  * Library/libtool version macros (can be used for conditional compilation).
51  */
52 
53 /** The libsigrokdecode libtool 'current' version number. */
54 #define SRD_LIB_VERSION_CURRENT 0
55 
56 /** The libsigrokdecode libtool 'revision' version number. */
57 #define SRD_LIB_VERSION_REVISION 1
58 
59 /** The libsigrokdecode libtool 'age' version number. */
60 #define SRD_LIB_VERSION_AGE 0
61 
62 /** The libsigrokdecode libtool version ("current:revision:age") as string. */
63 #define SRD_LIB_VERSION_STRING "0:1:0"
64 
65 /*
66  * Status/error codes returned by libsigrokdecode functions.
67  *
68  * All possible return codes of libsigrokdecode functions must be listed here.
69  * Functions should never return hardcoded numbers as status, but rather
70  * use these #defines instead. All error codes are negative numbers.
71  *
72  * The error codes are globally unique in libsigrokdecode, i.e. if one of the
73  * libsigrokdecode functions returns a "malloc error" it must be exactly the
74  * same return value as used by all other functions to indicate "malloc error".
75  * There must be no functions which indicate two different errors via the
76  * same return code.
77  *
78  * Also, for compatibility reasons, no defined return codes are ever removed
79  * or reused for different #defines later. You can only add new #defines and
80  * return codes, but never remove or redefine existing ones.
81  */
82 #define SRD_OK 0 /**< No error */
83 #define SRD_ERR -1 /**< Generic/unspecified error */
84 #define SRD_ERR_MALLOC -2 /**< Malloc/calloc/realloc error */
85 #define SRD_ERR_ARG -3 /**< Function argument error */
86 #define SRD_ERR_BUG -4 /**< Errors hinting at internal bugs */
87 #define SRD_ERR_PYTHON -5 /**< Python C API error */
88 #define SRD_ERR_DECODERS_DIR -6 /**< Protocol decoder path invalid */
89 
90 /* libsigrokdecode loglevels. */
91 #define SRD_LOG_NONE 0 /**< Output no messages at all. */
92 #define SRD_LOG_ERR 1 /**< Output error messages. */
93 #define SRD_LOG_WARN 2 /**< Output warnings. */
94 #define SRD_LOG_INFO 3 /**< Output informational messages. */
95 #define SRD_LOG_DBG 4 /**< Output debug messages. */
96 #define SRD_LOG_SPEW 5 /**< Output very noisy debug messages. */
97 
98 /*
99  * Use SRD_API to mark public API symbols, and SRD_PRIV for private symbols.
100  *
101  * Variables and functions marked 'static' are private already and don't
102  * need SRD_PRIV. However, functions which are not static (because they need
103  * to be used in other libsigrokdecode-internal files) but are also not
104  * meant to be part of the public libsigrokdecode API, must use SRD_PRIV.
105  *
106  * This uses the 'visibility' feature of gcc (requires gcc >= 4.0).
107  *
108  * This feature is not available on MinGW/Windows, as it is a feature of
109  * ELF files and MinGW/Windows uses PE files.
110  *
111  * Details: http://gcc.gnu.org/wiki/Visibility
112  */
113 
114 /* Marks public libsigrokdecode API symbols. */
115 #ifndef _WIN32
116 #define SRD_API __attribute__((visibility("default")))
117 #else
118 #define SRD_API
119 #endif
120 
121 /* Marks private, non-public libsigrokdecode symbols (not part of the API). */
122 #ifndef _WIN32
123 #define SRD_PRIV __attribute__((visibility("hidden")))
124 #else
125 #define SRD_PRIV
126 #endif
127 
128 /*
129  * When adding an output type, don't forget to...
130  * - expose it to PDs in controller.c:PyInit_sigrokdecode()
131  * - add a check in module_sigrokdecode.c:Decoder_put()
132  * - add a debug string in type_decoder.c:OUTPUT_TYPES
133  */
134 enum {
138 };
139 
140 #define SRD_MAX_NUM_PROBES 64
141 
142 /* TODO: Documentation. */
143 struct srd_decoder {
144  /** The decoder ID. Must be non-NULL and unique for all decoders. */
145  char *id;
146 
147  /** The (short) decoder name. Must be non-NULL. */
148  char *name;
149 
150  /** The (long) decoder name. Must be non-NULL. */
151  char *longname;
152 
153  /** A (short, one-line) description of the decoder. Must be non-NULL. */
154  char *desc;
155 
156  /**
157  * The license of the decoder. Valid values: "gplv2+", "gplv3+".
158  * Other values are currently not allowed. Must be non-NULL.
159  */
160  char *license;
161 
162  /** List of probes required by this decoder. */
163  GSList *probes;
164 
165  /** List of optional probes for this decoder. */
166  GSList *opt_probes;
167 
168  /**
169  * List of NULL-terminated char[], containing descriptions of the
170  * supported annotation output.
171  */
172  GSList *annotations;
173 
174  /** Python module. */
175  PyObject *py_mod;
176 
177  /** sigrokdecode.Decoder class. */
178  PyObject *py_dec;
179 };
180 
181 /**
182  * Structure which contains information about one protocol decoder probe.
183  * For example, I2C has two probes, SDA and SCL.
184  */
185 struct srd_probe {
186  /** The ID of the probe. Must be non-NULL. */
187  char *id;
188  /** The name of the probe. Must not be NULL. */
189  char *name;
190  /** The description of the probe. Must not be NULL. */
191  char *desc;
192  /** The index of the probe, i.e. its order in the list of probes. */
193  int order;
194 };
195 
198  PyObject *py_inst;
199  char *inst_id;
200  GSList *pd_output;
205  uint64_t data_samplerate;
206  GSList *next_di;
207 };
208 
210  int pdo_id;
213  char *proto_id;
214 };
215 
217  uint64_t start_sample;
218  uint64_t end_sample;
221  void *data;
222 };
223 
224 typedef void (*srd_pd_output_callback_t)(struct srd_proto_data *pdata,
225  void *cb_data);
226 
230  void *cb_data;
231 };
232 
233 /* Custom Python types: */
234 
235 typedef struct {
236  PyObject_HEAD
237 } srd_Decoder;
238 
239 typedef struct {
240  PyObject_HEAD
242  uint64_t start_samplenum;
243  unsigned int itercnt;
244  uint8_t *inbuf;
245  uint64_t inbuflen;
246  PyObject *sample;
247 } srd_logic;
248 
249 /*--- controller.c ----------------------------------------------------------*/
250 
251 SRD_API int srd_init(const char *path);
252 SRD_API int srd_exit(void);
254  GHashTable *options);
256  GHashTable *probes);
257 SRD_API struct srd_decoder_inst *srd_inst_new(const char *id,
258  GHashTable *options);
259 SRD_API int srd_inst_stack(struct srd_decoder_inst *di_from,
260  struct srd_decoder_inst *di_to);
262 SRD_API int srd_session_start(int num_probes, int unitsize,
263  uint64_t samplerate);
264 SRD_API int srd_session_send(uint64_t start_samplenum, const uint8_t *inbuf,
265  uint64_t inbuflen);
266 SRD_API int srd_pd_output_callback_add(int output_type,
267  srd_pd_output_callback_t cb, void *cb_data);
268 
269 /*--- decoder.c -------------------------------------------------------------*/
270 
271 SRD_API GSList *srd_decoder_list(void);
272 SRD_API struct srd_decoder *srd_decoder_get_by_id(const char *id);
273 SRD_API int srd_decoder_load(const char *name);
274 SRD_API int srd_decoder_unload(struct srd_decoder *dec);
275 SRD_API int srd_decoder_load_all(void);
277 SRD_API char *srd_decoder_doc_get(const struct srd_decoder *dec);
278 
279 /*--- log.c -----------------------------------------------------------------*/
280 
281 typedef int (*srd_log_callback_t)(void *cb_data, int loglevel,
282  const char *format, va_list args);
283 
284 SRD_API int srd_log_loglevel_set(int loglevel);
285 SRD_API int srd_log_loglevel_get(void);
286 SRD_API int srd_log_callback_set(srd_log_callback_t cb, void *cb_data);
288 SRD_API int srd_log_logdomain_set(const char *logdomain);
289 SRD_API char *srd_log_logdomain_get(void);
290 
291 /*--- version.c -------------------------------------------------------------*/
292 
296 SRD_API const char *srd_package_version_string_get(void);
297 
301 SRD_API const char *srd_lib_version_string_get(void);
302 
303 #ifdef __cplusplus
304 }
305 #endif
306 
307 #endif