1 /* 2 * SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #include "esp_private/systimer.h" 8 9 /** 10 * @brief systimer's clock source is fixed to XTAL (40MHz), and has a fixed fractional divider (2.5). 11 * So the resolution of the systimer is 40MHz/2.5 = 16MHz. 12 */ 13 systimer_ticks_to_us(uint64_t ticks)14uint64_t systimer_ticks_to_us(uint64_t ticks) 15 { 16 return ticks / 16; 17 } 18 systimer_us_to_ticks(uint64_t us)19uint64_t systimer_us_to_ticks(uint64_t us) 20 { 21 return us * 16; 22 } 23