+/**
+ * Initialize the library context and data structures, and scan for devices.
+ *
+ * @param[out] ctx A pointer to the context the library will be used in.
+ *
+ * @return 0 on success, a negative value on error
+ */
+int am7xxx_init(am7xxx_context **ctx);
+
+/**
+ * Cleanup the library data structures and free the context.
+ *
+ * @param[in,out] ctx The context to free.
+ */
+void am7xxx_shutdown(am7xxx_context *ctx);
+
+/**
+ * Set verbosity level of log messages.
+ *
+ * @note The level is per-context.
+ *
+ * @note Messages of level AM7XXX_LOG_FATAL are always shown, regardless
+ * of the value of the log_level parameter.
+ *
+ * @param[in] ctx The context to set the log level for
+ * @param[in] log_level The verbosity level to use in the context (see @link am7xxx_log_level @endlink)
+ */
+void am7xxx_set_log_level(am7xxx_context *ctx, am7xxx_log_level log_level);
+
+/**
+ * Open an am7xxx_device according to a index.
+ *
+ * The semantics of the 'device_index' argument follows the order
+ * of the devices as found when scanning the bus at am7xxx_init() time.
+ *
+ * @note When the user tries to open a device already opened the function
+ * returns -EBUSY and the device is left open.
+ *
+ * @param[in] ctx The context to open the device in
+ * @param[out] dev A pointer to the structure representing the device to open
+ * @param[in] device_index The index of the device on the bus
+ *
+ * @return 0 on success, a negative value on error
+ */
+int am7xxx_open_device(am7xxx_context *ctx,
+ am7xxx_device **dev,
+ unsigned int device_index);
+
+/**
+ * Close an am7xxx_device.
+ *
+ * Close an am7xxx_device so that it becomes available for some other
+ * user/process to open it.
+ *
+ * @param[in] dev A pointer to the structure representing the device to close
+ *
+ * @return 0 on success, a negative value on error
+ */
+int am7xxx_close_device(am7xxx_device *dev);
+
+/**
+ * Get info about an am7xxx device.
+ *
+ * Get information about a device, in the form of a
+ * @link am7xxx_device_info @endlink structure.
+ *
+ * @param[in] dev A pointer to the structure representing the device to get info of
+ * @param[out] device_info A pointer to the structure where to store the device info (see @link am7xxx_device_info @endlink)
+ *
+ * @return 0 on success, a negative value on error
+ */
+int am7xxx_get_device_info(am7xxx_device *dev,
+ am7xxx_device_info *device_info);
+
+/**
+ * Calculate the dimensions of an image to be shown on an am7xxx device.
+ *
+ * Before sending images bigger than the device native dimensions the user
+ * needs to rescale them, this utility function does the calculation in a way
+ * that the original image aspect ratio is preserved.
+ *
+ * @param[in] dev A pointer to the structure representing the device to get info of
+ * @param[in] upscale Whether to calculate scaled dimensions for images smaller than the native dimesions
+ * @param[in] original_width The width of the original image
+ * @param[in] original_height The height of the original image
+ * @param[out] scaled_width The width the rescaled image should have
+ * @param[out] scaled_height The height the rescaled image should have
+ *
+ * @return 0 on success, a negative value on error
+ */
+int am7xxx_calc_scaled_image_dimensions(am7xxx_device *dev,
+ unsigned int upscale,
+ unsigned int original_width,
+ unsigned int original_height,
+ unsigned int *scaled_width,
+ unsigned int *scaled_height);
+/**
+ * Send an image for display on a am7xxx device.
+ *
+ * This is the function that actually makes the device display something.
+ * Static pictures can be sent just once and the device will keep showing them
+ * until another image get sent or some command resets or turns off the display.
+ *
+ * @param[in] dev A pointer to the structure representing the device to get info of
+ * @param[in] format The format the image is in (see @link am7xxx_image_format @endlink enum)
+ * @param[in] width The width of the image
+ * @param[in] height The height of the image
+ * @param[in] image A buffer holding data in the format specified by the format parameter
+ * @param[in] image_size The size in bytes of the image buffer
+ *
+ * @return 0 on success, a negative value on error
+ */
+int am7xxx_send_image(am7xxx_device *dev,