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55 lines
1.6 KiB
55 lines
1.6 KiB
/*
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* A sample application transmitting AFSK at 1200 baud
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*
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* Portions Copyright (C) 2018 Libre Space Foundation
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* Portions Copyright (C) 2018 Jonathan Brandenburg
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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 <http://www.gnu.org/licenses/>.
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*/
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#ifndef UTILS_H_
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#define UTILS_H_
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#include <sys/time.h>
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#define BIT(x) (1 << x)
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static inline size_t min_ul(size_t x, size_t y) {
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size_t ret = x < y ? x : y;
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return ret;
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}
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/**
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*
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* @return the milliseconds from the start of the program.
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* Time is handled based on TIM2 timer.
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*/
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static inline uint32_t millis() {
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static struct timeval tv_start;
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static int tv_start_initialized = 0;
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if (!tv_start_initialized) {
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gettimeofday(&tv_start, NULL);
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}
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struct timeval tv_current;
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gettimeofday(&tv_current, NULL);
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uint32_t millis_elapsed = 0;
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millis_elapsed = (uint32_t) (tv_current.tv_sec - tv_start.tv_sec) * 1000;
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millis_elapsed += (uint32_t) (tv_current.tv_usec - tv_start.tv_usec) / 1000;
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return millis_elapsed;
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}
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#endif /* UTILS_H_ */
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