/* Copyright 2011 Jun Wako This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #ifndef TIMER_H #define TIMER_H 1 #include #include #if defined(__AVR__) # include "avr/timer_avr.h" #endif #define TIMER_DIFF(a, b, max) ((max == UINT8_MAX) ? ((uint8_t)((a) - (b))) : ((max == UINT16_MAX) ? ((uint16_t)((a) - (b))) : ((max == UINT32_MAX) ? ((uint32_t)((a) - (b))) : ((a) >= (b) ? (a) - (b) : (max) + 1 - (b) + (a))))) #define TIMER_DIFF_8(a, b) TIMER_DIFF(a, b, UINT8_MAX) #define TIMER_DIFF_16(a, b) TIMER_DIFF(a, b, UINT16_MAX) #define TIMER_DIFF_32(a, b) TIMER_DIFF(a, b, UINT32_MAX) #define TIMER_DIFF_RAW(a, b) TIMER_DIFF_8(a, b) #ifdef __cplusplus extern "C" { #endif extern volatile uint32_t timer_count; void timer_init(void); void timer_clear(void); uint16_t timer_read(void); uint32_t timer_read32(void); uint16_t timer_elapsed(uint16_t last); uint32_t timer_elapsed32(uint32_t last); // Utility functions to check if a future time has expired & autmatically handle time wrapping if checked / reset frequently (half of max value) #define timer_expired(current, future) (((uint16_t)current - (uint16_t)future) < 0x8000) #define timer_expired32(current, future) (((uint32_t)current - (uint32_t)future) < 0x80000000) #ifdef __cplusplus } #endif #endif 89c24c022f209e8275ea01f4'>commitdiff stats

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