qmk-firmware/platforms/arm_atsam/timer.c

#include "samd51j18a.h"
#include "timer.h"
#include "tmk_core/protocol/arm_atsam/clks.h"

void set_time(uint64_t tset) {
    ms_clk = tset;
}

void timer_init(void) {
    timer_clear();
}

uint16_t timer_read(void) {
    return (uint16_t)ms_clk;
}

uint32_t timer_read32(void) {
    return (uint32_t)ms_clk;
}

uint64_t timer_read64(void) {
    return ms_clk;
}

uint16_t timer_elapsed(uint16_t tlast) {
    return TIMER_DIFF_16(timer_read(), tlast);
}

uint32_t timer_elapsed32(uint32_t tlast) {
    return TIMER_DIFF_32(timer_read32(), tlast);
}

void timer_clear(void) {
    set_time(0);
}