/**
 * @file systick.cpp
 * @brief SysTick 时基模块实现。
 */

#include "main.h"
#include "sys/systick.h"

volatile uint32_t SysTickTimer::s_ms = 0U;

void SysTickTimer::onInterrupt()
{
    s_ms++;
}

void SysTickTimer::delayMs(uint32_t ms)
{
    uint32_t start = s_ms;
    while((s_ms - start) < ms) { }
}

void SysTickTimer::initMs()
{
    SystemCoreClockUpdate();
    SysTick_Config(SystemCoreClock / 1000U);
}

/* ----- 中断入口 C 包装 ---------------------------------------------- */
void SysTick_Handler(void) { SysTickTimer::onInterrupt(); }