/**
 * @file Timer.cpp
 * @brief 用户调度定时器模块实现。
 */

#include "main.h"
#include "device/Timer.h"
#include "sys/task_manager.h"
#include "sys/config.h"

void SchedulerTimer::configureTimer()
{
    timer_parameter_struct timer_initpara;

    rcu_periph_clock_enable(CONFIG_SCHED_TIMER_RCU);
    timer_deinit(CONFIG_SCHED_TIMER_INSTANCE);
    timer_struct_para_init(&timer_initpara);

    timer_initpara.prescaler = CONFIG_SCHED_TIMER_PRESCALER;
    timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
    timer_initpara.counterdirection = TIMER_COUNTER_UP;
    timer_initpara.period = CONFIG_SCHED_TIMER_PERIOD;
    timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
    timer_init(CONFIG_SCHED_TIMER_INSTANCE, &timer_initpara);

    timer_interrupt_flag_clear(CONFIG_SCHED_TIMER_INSTANCE, TIMER_INT_FLAG_UP);
    timer_interrupt_enable(CONFIG_SCHED_TIMER_INSTANCE, TIMER_INT_UP);
    timer_enable(CONFIG_SCHED_TIMER_INSTANCE);
}

void SchedulerTimer::configureNvic()
{
    nvic_priority_group_set(NVIC_PRIGROUP_PRE2_SUB2);
    nvic_irq_enable(CONFIG_SCHED_TIMER_IRQn, CONFIG_SCHED_TIMER_IRQ_PREEMPT_PRIO, CONFIG_SCHED_TIMER_IRQ_SUB_PRIO);
}

void SchedulerTimer::init()
{
    configureTimer();
    configureNvic();
}

void SchedulerTimer::onInterrupt()
{
    if(timer_interrupt_flag_get(CONFIG_SCHED_TIMER_INSTANCE, TIMER_INT_FLAG_UP) == RESET) return;
    timer_interrupt_flag_clear(CONFIG_SCHED_TIMER_INSTANCE, TIMER_INT_FLAG_UP);
    TaskManager::tick100us();
}

/* ----- 中断入口 C 包装 ---------------------------------------------- */
void TIMER2_IRQHandler(void) { SchedulerTimer::onInterrupt(); }