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