/*
 * drv_key.c
 *
 *  Created on: Jun 11, 2023
 *      Author: gxms0
 */
#include "drv_key.h"

KEY_t key1;
KEY_t key2;
KEY_t key3;
KEY_t key4;


void key_init(void)
{
    key_config(&key1, GPIOD, GPIO_Pin_2, 0);
    key_config(&key2, GPIOB, GPIO_Pin_3, 0);
    key_config(&key3, GPIOB, GPIO_Pin_4, 0);
    key_config(&key4, GPIOB, GPIO_Pin_5, 0);
}

void key_thread(void)
{
    key_update(&key1);
    key_update(&key2);
    key_update(&key3);
    key_update(&key4);
}



void key_config(KEY_ptr ptr, GPIO_TypeDef *GPIO, uint32_t Pin, uint8_t type)
{
    ptr->GPIO = GPIO;
    ptr->Pin = Pin;

    ptr->type = type;

    ptr->delay = 20;//20ms

    ptr->state = release;//定义按下是的电平，如果按下时高电平，赋值0x01，如果按下时，电平信号为低电平，那么赋值为0x00;
    ptr->last = release;
    ptr->current = release;

    //初始化IO口
    GPIO_InitTypeDef GPIO_InitStructure = {0};
    uint32_t RCC_Periph;

    if(ptr->GPIO == GPIOA)RCC_Periph = RCC_APB2Periph_GPIOA;
    else if(ptr->GPIO == GPIOB)RCC_Periph = RCC_APB2Periph_GPIOB;
    else if(ptr->GPIO == GPIOC)RCC_Periph = RCC_APB2Periph_GPIOC;
    else if(ptr->GPIO == GPIOD)RCC_Periph = RCC_APB2Periph_GPIOD;
    else if(ptr->GPIO == GPIOE)RCC_Periph = RCC_APB2Periph_GPIOE;

    RCC_APB2PeriphClockCmd(RCC_Periph, ENABLE);
    GPIO_InitStructure.GPIO_Pin = ptr->Pin;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
    GPIO_Init(ptr->GPIO, &GPIO_InitStructure);

}


void key_update(KEY_ptr ptr)
{
    uint8_t gpio_bit = (GPIO_ReadInputDataBit(ptr->GPIO,ptr->Pin))?(0x01):(0x00);

    switch(ptr->type)
    {
    case 0x00:{
        ptr->current = (gpio_bit)?(release):(pressed);//如果是0，认为是按下
    }break;
    case 0x01:{
        ptr->current = (gpio_bit)?(pressed):(release);//如果是1，认为是按下
    }break;
    }

    if((get_ticks_usec() - ptr->tick ) >= (ptr->delay * 1000))
    {
        ptr->tick  = get_ticks_usec();

        if(ptr->state == release)//state::release
        {
            if(ptr->current != ptr->state)
            {
                 if(ptr->last == ptr->state)
                 {
                     ptr->state = pressed;
                 }
            }
        }
        else//state::press
        {
            if(ptr->current != ptr->state)
            {
                 if(ptr->last == ptr->state)
                 {
                     ptr->state = release;
                 }
            }
        }

        ptr->last = ptr->current;

    }
}