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https://github.com/LIV2/amiga-par-to-spi-adapter.git
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52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/*
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* SPI NET ENC28J60 device driver for K1208/Amiga 1200
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*
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* Copyright (C) 2018 Mike Stirling
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef TIMER_H_
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#define TIMER_H_
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#include <stdint.h>
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#ifndef TIMER_TICK_FREQ
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/*! Tick frequency in Hz - defines timer resolution */
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#define TIMER_TICK_FREQ 50
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#endif
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/*! Helper macro calculates number of ticks in specified ms (rounds up) */
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#define TIMER_MILLIS(ms) (((uint32_t)(ms) * (TIMER_TICK_FREQ) + 999ul) / 1000ul)
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/*! Helper macro calculates number of ticks in specified s */
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#define TIMER_SECONDS(s) ((uint32_t)(s) * (TIMER_TICK_FREQ))
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/*! Helper macro converts ticks back to milliseconds (rounds down) */
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#define TIMER_TO_MILLIS(ticks) ((uint32_t)(ticks) * 1000ul / (TIMER_TICK_FREQ))
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/*! Helper macro converts ticks back to seconds (rounds down) */
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#define TIMER_TO_SECONDS(ticks) ((uint32_t)(ticks) / (TIMER_TICK_FREQ))
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/*!
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* Returns current 32-bit tick counter in
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* increments of TIMER_TICK_FREQ
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*
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* \return Current tick count
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*/
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uint32_t timer_get_tick_count(void);
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void timer_delay(uint32_t ticks);
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#endif /* TIMER_H_ */
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