forked from mirrors/qmk_firmware
41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/* Copyright 2021 QMK
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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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#include <ch.h>
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#include <hal.h>
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#include "_wait.h"
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#ifdef WAIT_US_TIMER
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void wait_us(uint16_t duration) {
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static const GPTConfig gpt_cfg = {.frequency = 1000000}; /* 1MHz timer, no callback */
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if (duration == 0) {
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duration = 1;
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}
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/*
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* Only use this timer on the main thread;
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* other threads need to use their own timer.
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*/
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if (chThdGetSelfX() == &(currcore->mainthread) && duration < (1ULL << (sizeof(gptcnt_t) * 8))) {
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gptStart(&WAIT_US_TIMER, &gpt_cfg);
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gptPolledDelay(&WAIT_US_TIMER, duration);
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} else {
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chThdSleepMicroseconds(duration);
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}
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}
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#endif
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