#include "bsp_key.h"
#include "bsp_config_delay.h"

U8 bsp_key_init(void)
{
	D_stdIO_P3(BITN6);
	D_stdIO_P1(BITN7);
	D_stdIO_P0(BITN6);
	D_stdIO_P4(BITN3);
	
	D_stdIO_P1(BITN0);
	D_stdIO_P0(BITN7);
	D_stdIO_P1(BITN3);
	D_stdIO_P2(BITN0);

	//初始化为高电平
	KR1 = KR2 = KR3 = KR4 = 1;
	//初始化为高电平
	KC1 = KC2 = KC3 = KC4 = 1;

	return 0;
}

void scan_row(U8 r)
{
	KR1 = 1;
	KR2 = 1;
	KR3 = 1;
	KR4 = 1;
	switch(r){
		case 1:
			KR1 = 0;break;
		case 2:
			KR2 = 0;break;
		case 3:
			KR3 = 0;break;
		case 4:
			KR4 = 0;break;
		default:
			break;
	}
}

U8 scan_col(U8 c)
{
	if(c == 1)
	{
		if(KC1 == 0)
		{
			delayInMs(10);
			if(KC1 == 0)
			{
				while(KC1 == 0);
				return 1;
			}
		}
	}
	else if(c == 2){
		if(KC2 == 0)
		{
			delayInMs(10);
			if(KC2 == 0)
			{
				while(KC2 == 0);
				return 1;
			}
		}
	}
	else if(c == 3){
		if(KC3 == 0)
		{
			delayInMs(10);
			if(KC3 == 0)
			{
				while(KC3 == 0);
				return 1;
			}
		}
	}
	else if(c == 4){
		if(KC4 == 0)
		{
			delayInMs(10);
			if(KC4 == 0)
			{
				while(KC4 == 0);
				return 1;
			}
		}
	}
	return 0;
}

U8 bsp_key_scan(void)
{
	U8 key = BSP_KEY_NUM_MAX;
	//扫描第1行
	scan_row(1);
	if(scan_col(1) > 0){
		return 0;
	}
	if(scan_col(2) > 0){
		return 1;
	}
	if(scan_col(3) > 0){
		return 2;
	}
	if(scan_col(4) > 0){
		return 3;
	}

	//扫描第2行
	scan_row(2);
	if(scan_col(1) > 0){
		key = 4;
	}
	if(scan_col(2) > 0){
		key = 5;
	}
	if(scan_col(3) > 0){
		key = 6;
	}
	if(scan_col(4) > 0){
		key = 7;
	}

	//扫描第3行
	scan_row(3);
	if(scan_col(1) > 0){
		key = 8;
	}
	if(scan_col(2) > 0){
		key = 9;
	}
	if(scan_col(3) > 0){
		key = 10;
	}
	if(scan_col(4) > 0){
		key = 11;
	}

	//扫描第4行
	scan_row(4);
	if(scan_col(1) > 0){
		key = 12;
	}
	if(scan_col(2) > 0){
		key = 13;
	}
	// if(scan_col(KC3) > 0){
	// 	key = 14;
	// }
	// if(scan_col(KC4) > 0){
	// 	key = 15;
	// }

	return key;
}