CMS3in1/1.Cabin/4.MISC/实验4 外部中断实验/Drivers/BSP/KEY/key.c

/**
 ****************************************************************************************************
 * @file        key.c
 * @author      <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD>Ŷ<EFBFBD>(ALIENTEK)
 * @version     V1.0
 * @date        2021-10-14
 * @brief       <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * @license     Copyright (c) 2020-2032, <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӿƼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>޹<EFBFBD>˾
 ****************************************************************************************************
 * @attention
 *
 * ʵ<EFBFBD><EFBFBD>ƽ̨:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD> ̽<EFBFBD><EFBFBD><EFBFBD><EFBFBD> F407<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ:www.yuanzige.com
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̳:www.openedv.com
 * <EFBFBD><EFBFBD>˾<EFBFBD><EFBFBD>ַ:www.alientek.com
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ:openedv.taobao.com
 *
 * <EFBFBD>޸<EFBFBD>˵<EFBFBD><EFBFBD>
 * V1.0 20211014
 * <EFBFBD><EFBFBD>һ<EFBFBD>η<EFBFBD><EFBFBD><EFBFBD>
 *
 ****************************************************************************************************
 */

#include "./BSP/KEY/key.h"
#include "./SYSTEM/delay/delay.h"


/**
 * @brief       <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * @param       <EFBFBD><EFBFBD>
 * @retval      <EFBFBD><EFBFBD>
 */
void key_init(void)
{
    GPIO_InitTypeDef gpio_init_struct;                          /* GPIO<49><4F><EFBFBD>ò<EFBFBD><C3B2><EFBFBD><EFBFBD>洢<EFBFBD><E6B4A2><EFBFBD><EFBFBD> */
    KEY0_GPIO_CLK_ENABLE();                                     /* KEY0ʱ<30><CAB1>ʹ<EFBFBD><CAB9> */
    KEY1_GPIO_CLK_ENABLE();                                     /* KEY1ʱ<31><CAB1>ʹ<EFBFBD><CAB9> */
    KEY2_GPIO_CLK_ENABLE();                                     /* KEY2ʱ<32><CAB1>ʹ<EFBFBD><CAB9> */
    WKUP_GPIO_CLK_ENABLE();                                     /* WKUPʱ<50><CAB1>ʹ<EFBFBD><CAB9> */

    gpio_init_struct.Pin = KEY0_GPIO_PIN;                       /* KEY0<59><30><EFBFBD><EFBFBD> */
    gpio_init_struct.Mode = GPIO_MODE_INPUT;                    /* <20><><EFBFBD><EFBFBD> */
    gpio_init_struct.Pull = GPIO_PULLUP;                        /* <20><><EFBFBD><EFBFBD> */
    gpio_init_struct.Speed = GPIO_SPEED_FREQ_HIGH;              /* <20><><EFBFBD><EFBFBD> */
    HAL_GPIO_Init(KEY0_GPIO_PORT, &gpio_init_struct);           /* KEY0<59><30><EFBFBD><EFBFBD>ģʽ<C4A3><CABD><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */

    gpio_init_struct.Pin = KEY1_GPIO_PIN;                       /* KEY1<59><31><EFBFBD><EFBFBD> */
    gpio_init_struct.Mode = GPIO_MODE_INPUT;                    /* <20><><EFBFBD><EFBFBD> */
    gpio_init_struct.Pull = GPIO_PULLUP;                        /* <20><><EFBFBD><EFBFBD> */
    gpio_init_struct.Speed = GPIO_SPEED_FREQ_HIGH;              /* <20><><EFBFBD><EFBFBD> */
    HAL_GPIO_Init(KEY1_GPIO_PORT, &gpio_init_struct);           /* KEY1<59><31><EFBFBD><EFBFBD>ģʽ<C4A3><CABD><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */

    gpio_init_struct.Pin = KEY2_GPIO_PIN;                       /* KEY2<59><32><EFBFBD><EFBFBD> */
    gpio_init_struct.Mode = GPIO_MODE_INPUT;                    /* <20><><EFBFBD><EFBFBD> */
    gpio_init_struct.Pull = GPIO_PULLUP;                        /* <20><><EFBFBD><EFBFBD> */
    gpio_init_struct.Speed = GPIO_SPEED_FREQ_HIGH;              /* <20><><EFBFBD><EFBFBD> */
    HAL_GPIO_Init(KEY2_GPIO_PORT, &gpio_init_struct);           /* KEY2<59><32><EFBFBD><EFBFBD>ģʽ<C4A3><CABD><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */

    gpio_init_struct.Pin = WKUP_GPIO_PIN;                       /* WKUP<55><50><EFBFBD><EFBFBD> */
    gpio_init_struct.Mode = GPIO_MODE_INPUT;                    /* <20><><EFBFBD><EFBFBD> */
    gpio_init_struct.Pull = GPIO_PULLDOWN;                      /* <20><><EFBFBD><EFBFBD> */
    gpio_init_struct.Speed = GPIO_SPEED_FREQ_HIGH;              /* <20><><EFBFBD><EFBFBD> */
    HAL_GPIO_Init(WKUP_GPIO_PORT, &gpio_init_struct);           /* WKUP<55><50><EFBFBD><EFBFBD>ģʽ<C4A3><CABD><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */

}

/**
 * @brief       <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɨ<EFBFBD>躯<EFBFBD><EFBFBD>
 * @note        <EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD>(ͬʱ<EFBFBD><EFBFBD><EFBFBD>¶<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>): WK_UP > KEY2 > KEY1 > KEY0!!
 * @param       mode:0 / 1, <EFBFBD><EFBFBD><EFBFBD>庬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
 *   @arg       0,  <EFBFBD><EFBFBD>֧<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>²<EFBFBD><EFBFBD><EFBFBD>ʱ, ֻ<EFBFBD>е<EFBFBD>һ<EFBFBD>ε<EFBFBD><EFBFBD>û᷵<EFBFBD>ؼ<EFBFBD>ֵ,
 *                  <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɿ<EFBFBD><EFBFBD>Ժ<EFBFBD>, <EFBFBD>ٴΰ<EFBFBD><EFBFBD>²Ż᷵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ)
 *   @arg       1,  ֧<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>²<EFBFBD><EFBFBD><EFBFBD>ʱ, ÿ<EFBFBD>ε<EFBFBD><EFBFBD>øú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>᷵<EFBFBD>ؼ<EFBFBD>ֵ)
 * @retval      <EFBFBD><EFBFBD>ֵ, <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
 *              KEY0_PRES, 1, KEY0<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 *              KEY1_PRES, 2, KEY1<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 *              KEY2_PRES, 3, KEY2<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 *              WKUP_PRES, 4, WKUP<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 */
uint8_t key_scan(uint8_t mode)
{
    static uint8_t key_up = 1;  /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɿ<EFBFBD><C9BF><EFBFBD>־ */
    uint8_t keyval = 0;

    if (mode) key_up = 1;       /* ֧<><D6A7><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */

    if (key_up && (KEY0 == 0 || KEY1 == 0 || KEY2 == 0 || WK_UP == 1))  /* <20><><EFBFBD><EFBFBD><EFBFBD>ɿ<EFBFBD><C9BF><EFBFBD>־Ϊ1, <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
    {
        delay_ms(10);           /* ȥ<><C8A5><EFBFBD><EFBFBD> */
        key_up = 0;

        if (KEY0 == 0)  keyval = KEY0_PRES;

        if (KEY1 == 0)  keyval = KEY1_PRES;

        if (KEY2 == 0)  keyval = KEY2_PRES;

        if (WK_UP == 1) keyval = WKUP_PRES;
    }
    else if (KEY0 == 1 && KEY1 == 1 && KEY2 == 1 && WK_UP == 0)         /* û<><C3BB><EFBFBD>κΰ<CEBA><CEB0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <20><><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD>ɿ<EFBFBD> */
    {
        key_up = 1;
    }

    return keyval;              /* <20><><EFBFBD>ؼ<EFBFBD>ֵ */
}