storage.h (1635B)
1 /* 2 * Copyright (c) 2015, Natacha Porté 3 * 4 * Permission to use, copy, modify, and distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #ifndef BATTERY_STORAGE_H 18 #define BATTERY_STORAGE_H 19 20 /* a single entry in the event log */ 21 struct __attribute__((__packed__)) event { 22 time_t time; 23 uint8_t before; 24 uint8_t after; 25 }; 26 27 /* 28 * after field has the following format: 29 * - the most significant is 1 when charging, 0 when discharging 30 * - the remaining 7 bits hold the battery percentage value 31 * 32 * before either the value before the event, using the same format as after, 33 * or one of the following special value: 34 * - UNKNOWN (update from anomalous to normal value) 35 * - APP_STARTED 36 * - APP_CLOSED 37 * - ANOMALOUS_VALUE (then after has the whole 8-bit value) 38 */ 39 40 #define UNKNOWN 0xF0 41 #define APP_STARTED 0xF1 42 #define APP_CLOSED 0xF2 43 #define ANOMALOUS_VALUE 0xF3 44 45 #define PAGE_LENGTH (PERSIST_DATA_MAX_LENGTH / sizeof(struct event)) 46 47 #endif /* defined BATTERY_STORAGE_H */