/*****************************************************************************
 * Copyright (c) 2019, Nsing Technologies Pte. Ltd.
 *
 * All rights reserved.
 * ****************************************************************************
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Nations' name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL NATIONS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ****************************************************************************/

/**
 * @file main.c
 * @author Nations
 * @version v1.0.1
 *
 * @copyright Copyright (c) 2019, Nsing Technologies Pte. Ltd. All rights reserved.
 */
#include "main.h"
#include <stdio.h>

/**
 *  NVIC IRQ Priority
 */

__IO uint8_t PreemptionPriorityValue = 0;
__IO uint8_t Key_Status = 0;

void KeyInputExtiInit(GPIO_Module *GPIOx, uint16_t Pin);
void Delay(__IO uint32_t nCount);

/**
 * @brief  Main program.
 */
int main(void)
{
    /* log Init */
    log_init();
    log_info("NVIC IRQ Priority \r\n");

    KeyInputExtiInit(KEY_INPUT_PORT, KEY_INPUT_PIN);
    /* Configure the SysTick Handler Priority: Preemption priority(0) and subpriority */
    NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), PreemptionPriorityValue, 0));

    while (1)
    {
        if (Key_Status == 1)
        {
            log_info("Key_Status = 1 \r\n");
            /* Configure the SysTick Handler Priority: Preemption priority(2) and subpriority */
            NVIC_SetPriority(SysTick_IRQn,
                             NVIC_EncodePriority(NVIC_GetPriorityGrouping(), PreemptionPriorityValue + 2, 0));
        }
        else if (Key_Status == 2)
        {
            log_info("NVIC IRQ Priority Test End \r\n");
        }
        else
        {
            log_info("Key_Status = 0 \r\n");
        }

        /* Insert delay Time */
        Delay(0x8FFFFF);
    }
}

/**
 * @brief  Configures key port.
 * @param GPIOx x can be A to G to select the GPIO port.
 * @param Pin This parameter can be GPIO_PIN_0~GPIO_PIN_15.
 */
void KeyInputExtiInit(GPIO_Module *GPIOx, uint16_t Pin)
{
    GPIO_InitType GPIO_InitStructure;
    EXTI_InitType EXTI_InitStructure;
    NVIC_InitType NVIC_InitStructure;

    /* Check the parameters */
    assert_param(IS_GPIO_ALL_PERIPH(GPIOx));

    /* Enable the GPIO Clock */
    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA, ENABLE);

    /*Configure the GPIO pin as input floating*/
    GPIO_InitStructure.Pin = Pin;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitPeripheral(GPIOx, &GPIO_InitStructure);

    /*Configure key EXTI Line to key input Pin*/
    GPIO_ConfigEXTILine(KEY_INPUT_PORT_SOURCE, KEY_INPUT_PIN_SOURCE);

    /*Configure key EXTI line*/
    EXTI_InitStructure.EXTI_Line = KEY_INPUT_EXTI_LINE;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; // EXTI_Trigger_Rising;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_InitPeripheral(&EXTI_InitStructure);

    /* Configure the preemption priority and subpriority:
       - 1 bits for pre-emption priority: possible value are 0 or 1
       - 3 bits for subpriority: possible value are 0..7
       - Lower values gives higher priority
     */
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

    /*Set key input interrupt priority*/
    NVIC_InitStructure.NVIC_IRQChannel = KEY_INPUT_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}

/**
 * @brief  Inserts a delay time.
 * @param nCount specifies the delay time length.
 */
void Delay(__IO uint32_t nCount)
{
    for (; nCount != 0; nCount--)
        ;
}

/**
 * @}
 */

#ifdef USE_FULL_ASSERT
/**
 * @brief  Reports the name of the source file and the source line number
 *         where the assert_param error has occurred.
 * @param  file: pointer to the source file name
 *          line: assert_param error line source number
 * @return None
 */
void assert_failed(const uint8_t *expr, const uint8_t *file, uint32_t line)
{
    /* User can add his own implementation to report the file name and line number,
       ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

    /* Infinite loop */
    while (1)
    {
    }
}

/**
 * @}
 */
#endif
