各模块初始化函数(上电、LED、矩阵键盘、数码管)

/*----------------------------------上电初始化-----------------------------------*/
void System_Init()
{
	P0 = 0xFF;
	P2 = P2 & 0x1F | 0x80;
	P2 = P2 & 0x1F;
	
	P0 = 0x00;
	P2 = P2 & 0x1F | 0xA0;
	P2 = P2 & 0x1F;
}
/*---------------------------------LED初始化函数--------------------------------*/
void LED_Set(unsigned char arr , unsigned char status)
{
	static unsigned char temp = 0x00;
	static unsigned char temp_old = 0xFF;
	
	if(status){
		temp |= 0x01 << arr;
	}
	else{
		temp &= ~(0x01 << arr);
	}
	if(temp != temp_old){
		P0 = ~temp;
		P2 = P2 & 0x1F | 0x80;
		P2 &= 0x1F;
		temp_old = temp;
	}
}
/*-------------------------------矩阵键盘初始化函数----------------------------*/
unsigned char Key_Get()
{
	unsigned char temp = 0;
	P44 = 0; P42=1;P35=1;P34=1;
	if(P33==0)temp =4;
	if(P32==0)temp =5;
	if(P31==0)temp =6;
	if(P30==0)temp =7;
	
	P44 = 1; P42=0;P35=1;P34=1;
	if(P33==0)temp =8;
	if(P32==0)temp =9;
	if(P31==0)temp =10;
	if(P30==0)temp =11;
	
	P44 = 1; P42=1;P35=0;P34=1;
	if(P33==0)temp =12;
	if(P32==0)temp =13;
	if(P31==0)temp =14;
	if(P30==0)temp =15;
	
	P44 = 0; P42=1;P35=1;P34=0;
	if(P33==0)temp =16;
	if(P32==0)temp =17;
	if(P31==0)temp =18;
	if(P30==0)temp =19;
	return temp;
}
/*-------------------------------数码管初始化函数----------------------------*/
unsigned char code smg_duanxuan[] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xBF,0xFF};//10- 11灭
unsigned char code smg_weixuan[] = {0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};

void Smg_Set(unsigned char wei,duan,point)
{
	P0 = 0xFF;
	P2 = P2 & 0x1F | 0xE0;
	P2 &= 0x1F;
	
	P0 = smg_weixuan[wei];
	P2 = P2 & 0x1F | 0xC0;
	P2 &= 0x1F;
	if(point){
		P0 = smg_duanxuan[duan] & 0x7F;// 0111 1111
		P2 = P2 & 0x1F | 0xE0;
		P2 &= 0x1F;
	}
	else{
		P0 = smg_duanxuan[duan];
		P2 = P2 & 0x1F | 0xE0;
		P2 &= 0x1F;
	}
}
/*--------------------------------------------------------------------------*/

主函数部分

#include <STC15F2K60S2.H>
#include "INit.h"
#include "LED.h"
#include "smg.h"
#include "Key.h"

unsigned char key_slow_down;
unsigned char key_old,key_val,key_down,key_up;
unsigned int smg_slow_down;
unsigned char smg_pos;
unsigned char smg_buf[8] = {1,2,3,4,5,6,7,8};
unsigned char smg_point[8] = {0,0,0,0,0,0,0,0};
unsigned char led_buf[8] = {0,0,0,0,0,0,0,0};

void Key_Function()
{
	if(key_slow_down)return;
	key_slow_down = 1;
	key_val = Key_Get();
	key_down =  key_val & (key_val ^ key_old);
	key_up = ~key_val & (key_val ^ key_old);
	key_old = key_val;
}
void smg_Function()
{
	if(smg_slow_down)return;
	smg_slow_down = 1;
}

void LED_Function()
{
	
}
void Timer0_Init(void)		//1毫秒@12.000MHz
{
	AUXR &= 0x7F;			//定时器时钟12T模式
	TMOD &= 0xF0;			//设置定时器模式
	TL0 = 0x18;				//设置定时初始值
	TH0 = 0xFC;				//设置定时初始值
	TF0 = 0;				//清除TF0标志
	TR0 = 1;				//定时器0开始计时
	
	ET0 = 1;
	EA=1;
}

void Timer0_Function() interrupt 1
{
	if(++key_slow_down==10)key_slow_down=0;
	if(++smg_slow_down==50)smg_slow_down=0;
	if(++smg_pos==8)smg_pos = 0;
	Smg_Set(smg_pos,smg_buf[smg_pos],smg_point[smg_pos]);
	LED_Set(smg_pos,led_buf[smg_pos]);
}
void main()
{
	System_Init();
	Timer0_Init();
	while(1)
	{
		Key_Function();
		smg_Function();
		LED_Function();
	}
}