// #include "stm32f10x.h"
// #include "led.h"
// #include "usart.h"
// #include "delay.h"
// #include "button4_4.h"
#define __GE_INPUT_IMPLIMEMT__
#include "ge_mem_input.h"
struct IO_PORT
{
    GPIO_TypeDef *GPIO_x;
    unsigned short GPIO_pin;
};

static struct IO_PORT KEY_OUT[4] = {
    {KEY_H1_GPIO_Port, KEY_H1_Pin},
    {KEY_H2_GPIO_Port, KEY_H2_Pin},
    {KEY_H3_GPIO_Port, KEY_H3_Pin},
    {KEY_H4_GPIO_Port, KEY_H4_Pin}
};

static struct IO_PORT KEY_IN[4] = {
    {KEY_L1_GPIO_Port, KEY_L1_Pin},
    {KEY_L2_GPIO_Port, KEY_L2_Pin},
    {KEY_L3_GPIO_Port, KEY_L3_Pin},
    {KEY_L4_GPIO_Port, KEY_L4_Pin}
};

int key[4][4];
/*
void Button4_4_Init(void) {
    GPIO_InitTypeDef GPIO_InitStructure;
    unsigned char i;
    
		RCC_APB2PeriphClockCmd(KEY_GPIO_CLK, ENABLE);
	
		for(i = 0; i < 4; i++) {
        GPIO_InitStructure.GPIO_Pin = KEY_OUT[i].GPIO_pin;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
				GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
				
				GPIO_Init(KEY_OUT[i].GPIO_x, &GPIO_InitStructure);
    }
		
		
		for(i = 0; i < 4; i++) {
        GPIO_InitStructure.GPIO_Pin = KEY_IN[i].GPIO_pin;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
				GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
				
				GPIO_Init(KEY_IN[i].GPIO_x, &GPIO_InitStructure);
    }
		

		
		
		for(i = 0; i < 4; i++) {
				GPIO_SetBits(KEY_OUT[i].GPIO_x, KEY_OUT[i].GPIO_pin);
		}
		
		for(i = 0; i < 4; i++) {
			key[i][0] = 0;
			key[i][1] = 0;
			key[i][2] = 0;
			key[i][3] = 0;
		}
}
*/
//uint16_t key;



int Button4_4_Scan(void) {
    unsigned char i, j;

    for(i = 0; i < 4; i++) {
        delay_ms(10);
        GPIO_ResetBits(KEY_OUT[i].GPIO_x, KEY_OUT[i].GPIO_pin);
        for(j = 0; j < 4; j++) {

            delay_ms(10);
						if(GPIO_ReadInputDataBit(KEY_IN[j].GPIO_x, KEY_IN[j].GPIO_pin) == 0){

								key[i][j] = 1;
            } else {

								key[i][j] = 0;
            }
        }

				GPIO_SetBits(KEY_OUT[i].GPIO_x, KEY_OUT[i].GPIO_pin);
    }
		
		if(key[0][0] == 1) return 16;
		if(key[0][1] == 1) return 15;
		if(key[0][2] == 1) return 14;
		if(key[0][3] == 1) return 13;
		
		if(key[1][0] == 1) return 12;
		if(key[1][1] == 1) return 11;
		if(key[1][2] == 1) return 10;
		if(key[1][3] == 1) return 9;
		
		if(key[2][0] == 1) return 8;
		if(key[2][1] == 1) return 7;
		if(key[2][2] == 1) return 6;
		if(key[2][3] == 1) return 5;
		
		if(key[3][0] == 1) return 4;
		if(key[3][1] == 1) return 3;
		if(key[3][2] == 1) return 2;
		if(key[3][3] == 1) return 1;
	
		return 0;
}