X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;ds=inline;f=backend.c;h=4823044efce580dbc9d7a116f1eb46e63a84a389;hb=551c3d8ce36bebe02765c76ee4d04f4e700d61b2;hp=2d0b38e2e44ecbb22bff2a5640e2e38b38f851fe;hpb=5b30cca719b737fed96c00e1b7a5094770d9d815;p=libsigrok.git

diff --git a/backend.c b/backend.c
index 2d0b38e2..4823044e 100644
--- a/backend.c
+++ b/backend.c
@@ -19,6 +19,7 @@
  */
 
 #include <glib.h>
+#include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 
@@ -39,10 +40,14 @@
  * <a href="http://sigrok.org/wiki/Input_output_formats">input/output
  * file formats</a>.
  *
- * @section sec_error_handling Error handling
+ * @section sec_api API reference
  *
- * libsigrok functions usually return @ref SR_OK upon success, or a negative
- * error code on failure.
+ * See the "Modules" page for an introduction to various libsigrok
+ * related topics and the detailed API documentation of the respective
+ * functions.
+ *
+ * You can also browse the API documentation by file, or review all
+ * data structures.
  *
  * @section sec_mailinglists Mailing lists
  *
@@ -59,6 +64,56 @@
  * <a href="http://sigrok.org/wiki/Libsigrok">sigrok.org/wiki/Libsigrok</a>
  */
 
+/**
+ * @file
+ *
+ * Initializing and shutting down libsigrok.
+ */
+
+/**
+ * @defgroup grp_init Initialization
+ *
+ * Initializing and shutting down libsigrok.
+ *
+ * Before using any of the libsigrok functionality, sr_init() must
+ * be called to initialize the library, which will return a struct sr_context
+ * when the initialization was successful.
+ *
+ * When libsigrok functionality is no longer needed, sr_exit() should be
+ * called, which will (among other things) free the struct sr_context.
+ *
+ * Example for a minimal program using libsigrok:
+ *
+ * @code{.c}
+ *   #include <stdio.h>
+ *   #include <libsigrok/libsigrok.h>
+ *
+ *   int main(int argc, char **argv)
+ *   {
+ *   	int ret;
+ *   	struct sr_context *sr_ctx;
+ *
+ *   	if ((ret = sr_init(&sr_ctx)) != SR_OK) {
+ *   		printf("Error initializing libsigrok (%s): %s.",
+ *   		       sr_strerror_name(ret), sr_strerror(ret));
+ *   		return 1;
+ *   	}
+ *
+ *   	// Use libsigrok functions here...
+ *
+ *   	if ((ret = sr_exit(sr_ctx)) != SR_OK) {
+ *   		printf("Error shutting down libsigrok (%s): %s.",
+ *   		       sr_strerror_name(ret), sr_strerror(ret));
+ *   		return 1;
+ *   	}
+ *
+ *   	return 0;
+ *   }
+ * @endcode
+ *
+ * @{
+ */
+
 /**
  * Initialize libsigrok.
  *
@@ -130,3 +185,5 @@ SR_API int sr_exit(struct sr_context *ctx)
 
 	return SR_OK;
 }
+
+/** @} */