/*!
    \file  gd32f3x0_it.c
    \brief interrupt service routines
*/

/*
    Copyright (C) 2017 GigaDevice

    2017-06-06, V1.0.0, firmware for GD32F3x0
*/

#include "gd32f3x0_it.h"
#include "gd32f3x0_eval.h"
#include "main.h"

/*!
    \brief      this function handles NMI exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void NMI_Handler(void)
{
}

/*!
    \brief      this function handles HardFault exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void HardFault_Handler(void)
{
    /* if Hard Fault exception occurs, go to infinite loop */
    while (1);
}

/*!
    \brief      this function handles MemManage exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void MemManage_Handler(void)
{
    /* if Memory Manage exception occurs, go to infinite loop */
    while (1);
}

/*!
    \brief      this function handles BusFault exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void BusFault_Handler(void)
{
    /* if Bus Fault exception occurs, go to infinite loop */
    while (1);
}

/*!
    \brief      this function handles UsageFault exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void UsageFault_Handler(void)
{
    /* if Usage Fault exception occurs, go to infinite loop */
    while (1);
}

/*!
    \brief      this function handles SVC exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void SVC_Handler(void)
{
}

/*!
    \brief      this function handles DebugMon exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void DebugMon_Handler(void)
{
}

/*!
    \brief      this function handles PendSV exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void PendSV_Handler(void)
{
}

/*!
    \brief      this function handles SysTick exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void SysTick_Handler(void)
{
}

/*!
    \brief      this function handles external lines 0 to 1 interrupt request
    \param[in]  none
    \param[out] none
    \retval     none
*/
void EXTI0_1_IRQHandler(void)
{
    if(RESET != exti_interrupt_flag_get(WAKEUP_KEY_EXTI_LINE)){
        uint16_t wp_pages_bitmap = ((uint16_t)(WRITE_PROTECT_PAGES(WP_PAGES_BIT_1) | WRITE_PROTECT_PAGES(WP_PAGES_BIT_2) | WRITE_PROTECT_PAGES(WP_PAGES_BIT_3)));

        /* enable target pages write protection */
        fmc_ob_write_protection_enable(wp_pages_bitmap);

        /* clear the interrupt flag */
        exti_interrupt_flag_clear(WAKEUP_KEY_EXTI_LINE);
    }
}

/*!
    \brief      this function handles external lines 4 to 15 interrupt request
    \param[in]  none
    \param[out] none
    \retval     none
*/
void EXTI4_15_IRQHandler(void)
{
    if(RESET != exti_interrupt_flag_get(TAMPER_KEY_EXTI_LINE)){
        uint16_t wp_pages_bitmap = ((uint16_t)(WRITE_PROTECT_PAGES(WP_PAGES_BIT_1) | WRITE_PROTECT_PAGES(WP_PAGES_BIT_3)));

        /* disable target pages write protection */
        fmc_ob_write_protection_disable(wp_pages_bitmap);

        /* clear the interrupt flag */
        exti_interrupt_flag_clear(TAMPER_KEY_EXTI_LINE);
    }

    if(RESET != exti_interrupt_flag_get(USER_KEY_EXTI_LINE)){
        /* disable target pages write protection */
        fmc_ob_write_protection_disable(WP_ALL_PAGES_BITMAP);

        /* clear the interrupt flag */
        exti_interrupt_flag_clear(USER_KEY_EXTI_LINE);
    }
}