1 /* 2 $License: 3 Copyright (C) 2011-2012 InvenSense Corporation, All Rights Reserved. 4 See included License.txt for License information. 5 $ 6 */ 7 /** 8 * @defgroup Message_Layer message_layer 9 * @brief Motion Library - Message Layer 10 * Holds Low Occurance messages 11 * 12 * @{ 13 * @file message_layer.c 14 * @brief Holds Low Occurance Messages. 15 */ 16 #include "message_layer.h" 17 #include "log.h" 18 19 struct message_holder_t { 20 long message; 21 }; 22 23 static struct message_holder_t mh; 24 25 /** Sets a message. 26 * @param[in] set The flags to set. 27 * @param[in] clear Before setting anything this will clear these messages, 28 * which is useful for mutually exclusive messages such 29 * a motion or no motion message. 30 * @param[in] level Level of the messages. It starts at 0, and may increase 31 * in the future to allow more messages if the bit storage runs out. 32 */ 33 void inv_set_message(long set, long clear, int level) 34 { 35 if (level == 0) { 36 mh.message &= ~clear; 37 mh.message |= set; 38 } 39 } 40 41 /** Returns Message Flags for Level 0 Messages. 42 * Levels are to allow expansion of more messages in the future. 43 * @param[in] clear If set, will clear the message. Typically this will be set 44 * for one reader, so that you don't get the same message over and over. 45 * @return bit field to corresponding message. 46 */ 47 long inv_get_message_level_0(int clear) 48 { 49 long msg; 50 msg = mh.message; 51 if (clear) { 52 mh.message = 0; 53 } 54 return msg; 55 } 56 57 /** 58 * @} 59 */ 60
