- /* 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 = {1000000, NULL, 0, 0}; /* 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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