[Blue Bridge Road -- bug free code] interpretation of some codes of matrix keyboard

The specific interpretation plans to record a video and put it on B Stand. , In the afternoon, I went to change my glasses and began to record , There are too many scratches on the lens QAQ 

Press the key to make the nixie tube display the corresponding key value ,S4 Lighten up L1、L2,S8 Lighten up L3、L4,S12 Lighten up L5、L6,S16 Lighten up L7、L8

#include<stc15f2k60s2.h>
typedef unsigned char uchar;
typedef unsigned int uint;

uchar dsp_code[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
uchar dsp_value[8]={0xff,0xff,0xff,0xff,0xff,0xff};

uchar value,count_key;

void Timer_Init()
{
	AUXR|= 0x80;
	TMOD&= 0xf0;
	TL0=0xcd;
	TH0=0xd4;
	TR0=1;
	ET0=1;
	EA=1;
}

void serviceTimer() interrupt 1
{
	static uchar dsp_com=0;

	P0=0;P2=0xc0;P2=0;

	P0=dsp_value[dsp_com];P2=0xe0;P2=0;

	P0=1<<dsp_com;P2=0xc0;P2=0;

	if(++dsp_com==8)dsp_com=0;

	++count_key;
}
void scan_keyboard()
{
	static uchar key_stat=0;
	uchar key_val=0,key_x=0,key_y=0;

	P3=0x0f;P4=0x00;
	if(!P30) key_x=3;
	else if(!P31) key_x=2;
	else if(!P32) key_x=1;
	else if(!P33) key_x=0;

	P3=0xf0;P4=0xff;
	if(!P34) key_y=4;
	else if(!P35) key_y=3;
	else if(!P42) key_y=2;
	else if(!P44) key_y=1;

	key_val=key_x+key_y*4;
	switch(key_stat)
	{
		case 0:
		if(key_val!=0) key_stat=1;
		break;
		case 1:
		if(key_val==0) key_stat=0;
				else
				{
					key_stat=2;
					value=key_val;
					switch(key_val)
					{
						case 4:P0=~0x03;P2=0x80;P2=0;break;
					    case 5:break;
						case 6:break;
						case 7:break;
						case 8:P0=~0x0c;P2=0x80;P2=0;break;
						case 9:break;
						case 0:break;
						case 11:break;
						case 12:P0=~0x30;P2=0x80;P2=0;break;
						case 13:break;
						case 14:break;
						case 15:break;
						case 16:P0=~0xc0;P2=0x80;P2=0;break;
						case 17:break;
						case 18:break;
						case 19:break;
						case 2:
						if(key_val==0) key_stat=0;
						break;
					}
				}
	}

}
void Initsystem()
{
	P0=0xff;P2=0x80;P2=0;
	P0=0x00;P2=0xa0;P2=0;
}

void main()
{
	Initsystem();
	Timer_Init();
	while(1)
	{
		if(count_key>9)
		{
			count_key=0;
			scan_keyboard();
		}
		if(value>9)
		{
			dsp_value[6]=dsp_code[value/10];
		}
		else
		{
			dsp_value[6]=0xff;
		}
		dsp_value[7]=dsp_code[value%10];
	}
}

  But there will be the phenomenon of insensitive keys QAQ

Press down S7 Add one to the number displayed by the nixie tube , Press down S11 Reduce the displayed number by one , The range of numbers is 0~200, Turn on the buzzer when the number is odd 、 Turn off the relay 、L1 bright , When the number is even , Turn on the relay 、 Turn off the buzzer 、L2 bright

 When the delay function is added, other lights will be on at low level , The delay function occasionally flashes .
*/
#include "stc15f2k60s2.h"
typedef unsigned char uchar;
typedef unsigned int uint;

uchar code smg_duanma[18]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,
						   0x80,0x90,0x88,0x80,0xc6,0xc0,0x86,0x8e,
						   0xbf,0x7f};
uchar smg_show[8]={0xff,0xff,0xff,0xff,0xff};  // initialization , Turn off the first five digital tubes 
uchar count_key;
uchar number=0;
sbit buzzer=P0^6;
sbit relay=P0^4;
//**************************************************
void Timer0_Init()
{
	AUXR|=0x80;
	TMOD&=0xf0;
	TH0=0xd4;
	TL0=0xcd;
	TR0=1;
	ET0=1;
	EA=1;
}

void Timer0_Service() interrupt 1
{
	static uchar smg_com=0;
	
	P0=0;P2=0xc0;P2=0;
	P0=smg_show[smg_com];P2=0xe0;P2=0;
	P0=1 << smg_com;P2=0xc0;P2=0;
	if(++smg_com == 8)     smg_com=0;
	
	++count_key;
}
//****************************************************
void Delay(uint t)
{
	while(t--);
}

void Scan_Key()
{
	static uchar key_stat=0;
	uchar key_val=0,key_x=0,key_y=0;
	
	P3=0x0f;P4=0x00;
	if(!P30)         key_x=3;
	else if(!P31)    key_x=2;
	else if(!P32)    key_x=1;
	else if(!P33)    key_x=0;
	
	P3=0xf0;P4=0xff;
	if(!P34)         key_y=4;
	else if(!P35)    key_y=3;
	else if(!P42)    key_y=2;
	else if(!P44)    key_y=1;

	key_val=key_x + key_y*4;
	switch(key_stat)
	{
		case 0:
			if(key_val!=0)     key_stat=1;         // Check the key for the first time 
		break;
		case 1:
			if(key_val==0)     key_stat=0;
			else
			{
				key_stat=2;                        // Second detection key 
				switch(key_val)
				{
					case 6:
						number=number+20;
						break;
					case 7:
					if(number>=200)
					{
						number=200;
					}
					else
						number++;
					if(number%2==0)
					{
						relay=1;
						buzzer=0;
						P2=0xa0;
						P2=0;
					}
					else
					{
						relay=0;
						buzzer=1;
						P2=0xa0;
						P2=0;
					}
						break;
					case 10:
						number=number-20;
						break;
					case 11:
					if(number==0)
					{
						number=0;
					}
					else
						number--;
					if(number%2==0)
					{
						relay=1;
						buzzer=0;
						P2=0xa0;
						P2=0;
					}
					else
					{
						relay=0;
						buzzer=1;
						P2=0xa0;
						P2=0;
					}
						break;
				}				
			}
				break;
		case 2:
			if(key_val == 0)     key_stat=0;      // Check the key for the third time 
			break;
	}	
}

void System_Init()
{
	P0=0xff;P2=0x80;P2=0;
	P0=0x00;P2=0xa0;P2=0;
}

void main()
{
	System_Init();
	Timer0_Init();
	while(1)
	{
		if(count_key > 9)
		{
			count_key=0;
			Scan_Key();
		}
		if(number<10)
		{
			smg_show[6]=0xff;
			smg_show[5]=0xff;
		}
		else if(number<100)
		{
			smg_show[6]=smg_duanma[number/10%10];
			smg_show[5]=0xff;
		}
		else
		{
			smg_show[6]=smg_duanma[number/10%10];
			smg_show[5]=smg_duanma[number/100];
		}
		smg_show[7]=smg_duanma[number%10];
//		smg_show[6]=smg_duanma[number/10%10];
//		smg_show[5]=smg_duanma[number/100];
		if(number%2==0)
		{
			P0=0xfe;P2=0x80;P2=0;
//			Delay(10000);
		}
		else
		{
			P0=0xfd;P2=0x80;P2=0;
//			Delay(10000);
		}
	}
}