#include "tim3.h"
#include "usart1.h"
#include <stdio.h>

extern Cmd_States Uart1_Cmd_State;

uint32_t g_tim3_count = 0;

extern uint32_t uart1_recv_time;

/**
 * @brief  Configures the different system clocks.
 */
void TIM3_RCC_Configuration(void)
{
    /* TIM3 clock enable */
    RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_TIM3, ENABLE);
}
/**
 * @brief  Configures tim3 clocks.
 */
void TIM3_TIM_Configuration(void)
{
    TIM_TimeBaseInitType TIM_TimeBaseStructure;
    /* Compute the prescaler value */

    /* Time base configuration */
    TIM_TimeBaseStructure.Period    = 9;     // 计数到9触发中断，即1ms
    TIM_TimeBaseStructure.Prescaler = 7199;     // 10K 
    TIM_TimeBaseStructure.ClkDiv    = 0;
    TIM_TimeBaseStructure.CntMode   = TIM_CNT_MODE_UP;

    TIM_InitTimeBase(TIM3, &TIM_TimeBaseStructure);

    /* Prescaler configuration */
    //TIM_ConfigPrescaler(TIM3, PrescalerValue, TIM_PSC_RELOAD_MODE_IMMEDIATE);

    /* TIM3 enable update irq */
    TIM_ConfigInt(TIM3, TIM_INT_UPDATE, ENABLE);

    /* TIM3 enable counter */
    TIM_Enable(TIM3, ENABLE);
}
/**
 * @brief  Configure the nested vectored interrupt controller.
 */
void TIM3_NVIC_Configuration(void)
{
    NVIC_InitType NVIC_InitStructure;

    /* Enable the TIM3 global Interrupt */
    NVIC_InitStructure.NVIC_IRQChannel                   = TIM3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;       // 抢占式中断优先级 0-3，最低
    NVIC_InitStructure.NVIC_IRQChannelSubPriority        = 3;       // 子中断优先级     0-3，最低
    NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;

    NVIC_Init(&NVIC_InitStructure);
}
/**
 * @brief  This function handles TIM3 global interrupt request.
 */
void TIM3_IRQHandler(void)
{
    if (TIM_GetIntStatus(TIM3, TIM_INT_UPDATE) != RESET)
    {
        TIM_ClrIntPendingBit(TIM3, TIM_INT_UPDATE);

        //GPIOA->POD ^= GPIO_PIN_15;
        g_tim3_count++;
        if(g_tim3_count > uart1_recv_time) {
            Uart1_Cmd_State = kCmd_Head1;           // 将命令处理标志复位
        }
        //if(g_tim3_count % 1000 == 0) {
        //    printf("tim3 count %d  0x%08x\r\n", g_tim3_count, SCB->VTOR);
        //}
    }
}

void TIM3_Init(void)
{
    TIM3_RCC_Configuration();
    TIM3_TIM_Configuration();
    TIM3_NVIC_Configuration();
}