蓝桥杯之单片机学习（二十）——自创模板（最少省三，实现初始化、数码管显示、HC138独立按键（或矩阵键盘））

文章目录

• 前置
• 模板代码展示

前置

模板代码展示

#include <STC15F2K60S2.h>

#define uchar unsigned char
#define uint unsigned int
	
uchar code SMG_duanma[18] = 
	{0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,
	 0x88,0x80,0xc6,0xc0,0x86,0x8e,
	 0xbf,0x7f};//分别是0-9（对应下标），A-F，“-”，“.”

//分别是“0.-9.”
uchar code SMG_Dot_AC[10] = 
	 {0X40,0X79,0X24,0X30,0X19,0X12,0X02,0X78,0X00,0X10};

//系统初始化
void Initsys();
//配置HC138
void SelectHC138(uchar channel);
//在pos位码上，显示value段码
void DisplaySMG_Bit(uchar pos, uchar value);
//数码管8位码显示
void SMG_Display();
//数码管的延时
void Delay_one_ms_SMG();
//独立按键(BTN)
void Alone_Key();
//按键消抖延时
void Delay_five_ms_Key();
//矩阵键盘(KBD)
void Matrix_Key();
	 
void main()
{
	Initsys();
	while(1)
	{
		Matrix_Key();
		//Alone_Key();
		//SMG_Display();
	}
}

//矩阵键盘(KBD)
void Matrix_Key()
{
	uchar temp;
	//第一列
	P3 = 0X7F;P44 = 0; P42 = 1;
	temp = P3;
	temp = temp & 0X0F;
	if(temp != 0X0F)
	{
		Delay_five_ms_Key();
		temp = P3;
		temp = temp & 0X0F;
		if(temp != 0X0F)
		{
			temp = P3;
			switch(temp)
			{
				case 0X7E:
					DisplaySMG_Bit(0, SMG_duanma[1]);
				break;
				case 0X7D:
					DisplaySMG_Bit(1, SMG_duanma[1]);
				break;
				case 0X7B:
					DisplaySMG_Bit(2, SMG_duanma[1]);
				break;
				case 0X77:
					DisplaySMG_Bit(3, SMG_duanma[1]);
				break;
			}
			while(temp != 0X0F)
			{
				temp = P3;
				temp = temp & 0X0F;
			}
		}
	}
	//第二列
	P3 = 0XBF;P44 = 1; P42 = 0;
	temp = P3;
	temp = temp & 0X0F;
	if(temp != 0X0F)
	{
		Delay_five_ms_Key();
		temp = P3;
		temp = temp & 0X0F;
		if(temp != 0X0F)
		{
			temp = P3;
			switch(temp)
			{
				case 0XBE:
					DisplaySMG_Bit(0, SMG_duanma[2]);
				break;
				case 0XBD:
					DisplaySMG_Bit(1, SMG_duanma[2]);
				break;
				case 0XBB:
					DisplaySMG_Bit(2, SMG_duanma[2]);
				break;
				case 0XB7:
					DisplaySMG_Bit(3, SMG_duanma[2]);
				break;
			}
			while(temp != 0X0F)
			{
				temp = P3;
				temp = temp & 0X0F;
			}
		}
	}
	//第三列
	P3 = 0XDF;P44 = 1; P42 = 1;
	temp = P3;
	temp = temp & 0X0F;
	if(temp != 0X0F)
	{
		Delay_five_ms_Key();
		temp = P3;
		temp = temp & 0X0F;
		if(temp != 0X0F)
		{
			temp = P3;
			switch(temp)
			{
				case 0XDE:
					DisplaySMG_Bit(0, SMG_duanma[3]);
				break;
				case 0XDD:
					DisplaySMG_Bit(1, SMG_duanma[3]);
				break;
				case 0XDB:
					DisplaySMG_Bit(2, SMG_duanma[3]);
				break;
				case 0XD7:
					DisplaySMG_Bit(3, SMG_duanma[3]);
				break;
			}
			while(temp != 0X0F)
			{
				temp = P3;
				temp = temp & 0X0F;
			}
		}
	}
	//第四列
	P3 = 0XEF;P44 = 1; P42 = 1;
	temp = P3;
	temp = temp & 0X0F;
	if(temp != 0X0F)
	{
		Delay_five_ms_Key();
		temp = P3;
		temp = temp & 0X0F;
		if(temp != 0X0F)
		{
			temp = P3;
			switch(temp)
			{
				case 0XEE:
					DisplaySMG_Bit(0, SMG_duanma[4]);
				break;
				case 0XED:
					DisplaySMG_Bit(1, SMG_duanma[4]);
				break;
				case 0XEB:
					DisplaySMG_Bit(2, SMG_duanma[4]);
				break;
				case 0XE7:
					DisplaySMG_Bit(3, SMG_duanma[4]);
				break;
			}
			while(temp != 0X0F)
			{
				temp = P3;
				temp = temp & 0X0F;
			}
		}
	}
}

//按键消抖延时
void Delay_five_ms_Key()
{
	uint i,j;
	for(i = 0; i < 5; i++)
		for(j = 845; j > 0; j--);
}

//独立按键(BTN)
void Alone_Key()
{
	//S7按键
	if(P30 == 0)
	{
		Delay_five_ms_Key();
		if(P30 == 0)
		{
			DisplaySMG_Bit(0, SMG_duanma[0]);
		}
		while(!P30);
	}
	//S6按键
	else if(P31 == 0)
	{
		Delay_five_ms_Key();
		if(P31 == 0)
		{
			DisplaySMG_Bit(1, SMG_duanma[1]);
		}
		while(!P31);
	}
	//S5按键
	else if(P32 == 0)
	{
		Delay_five_ms_Key();
		if(P32 == 0)
		{
			DisplaySMG_Bit(2, SMG_duanma[2]);
		}
		while(!P32);
	}
	//S4按键
	else if(P33 == 0)
	{
		Delay_five_ms_Key();
		if(P33 == 0)
		{
			DisplaySMG_Bit(3, SMG_duanma[3]);
		}
		while(!P33);
	}
}

//配置HC138
void SelectHC138(uchar channel)
{
	switch(channel)
	{
		case 4:    //LED
			P2 = (P2 & 0X1F) | 0X80;
		break;
		case 5:    //蜂鸣器和继电器
			P2 = (P2 & 0X1F) | 0Xa0;
		break;
		case 6:    //位码
			P2 = (P2 & 0X1F) | 0Xc0;
		break;
		case 7:    //段码
			P2 = (P2 & 0X1F) | 0Xe0;
		break;
		case 0:    //锁住所有寄存器
			P2 = (P2 & 0X1F) | 0X00;
		break;
	}
}

//系统初始化
void Initsys()
{
	SelectHC138(5);
	P0 = 0X00;//关闭蜂鸣器和继电器
	SelectHC138(4);
	P0 = 0XFF;//关闭LED
	
	SelectHC138(6);
	P0 = 0XFF; //选择所有数码管
	SelectHC138(7);
	P0 = 0XFF; //关闭所有数码管
}

//在pos位码上，显示value段码
void DisplaySMG_Bit(uchar pos, uchar value)
{
	SelectHC138(6);
	P0 = 0X01 << pos;
	SelectHC138(7);
	P0 = value;
}

//数码管8位码显示
void SMG_Display()
{
	DisplaySMG_Bit(0, SMG_duanma[0]);
	Delay_one_ms_SMG();
	DisplaySMG_Bit(1, SMG_duanma[1]);
	Delay_one_ms_SMG();
	DisplaySMG_Bit(2, SMG_duanma[2]);
	Delay_one_ms_SMG();
	DisplaySMG_Bit(3, SMG_duanma[3]);
	Delay_one_ms_SMG();
	
	DisplaySMG_Bit(4, SMG_duanma[4]);
	Delay_one_ms_SMG();
	DisplaySMG_Bit(5, SMG_duanma[5]);
	Delay_one_ms_SMG();
	DisplaySMG_Bit(6, SMG_duanma[6]);
	Delay_one_ms_SMG();
	DisplaySMG_Bit(7, SMG_duanma[7]);
	Delay_one_ms_SMG();
}

//数码管的延时
void Delay_one_ms_SMG()
{
	uint j;
	for(j = 845; j > 0; j--);
}