circuitpython/shared-module/time/__init__.c

49 lines
1.9 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/mphal.h"
#include "supervisor/port.h"
#include "supervisor/shared/tick.h"
#include "shared-bindings/time/__init__.h"
uint64_t common_hal_time_monotonic_ms(void) {
return supervisor_ticks_ms64();
}
uint64_t common_hal_time_monotonic_ns(void) {
uint8_t subticks = 0;
uint64_t ticks = port_get_raw_ticks(&subticks);
// A tick is 976562.5 nanoseconds so multiply it by the base and add half instead of doing float
// math.
// A subtick is 1/32 of a tick.
// 30518 is 1e9 / 32768
return 976562 * ticks + ticks / 2 + 30518 * subticks;
}
void common_hal_time_delay_ms(uint32_t delay) {
mp_hal_delay_ms(delay);
}