綜合小實(shí)驗(yàn)，完整的代碼，對(duì)前一段學(xué)習(xí)的總結(jié)。

模塊化編程去拼接實(shí)現(xiàn)自己想要的功能,一鍵多義用switch語(yǔ)句實(shí)現(xiàn)

延時(shí)函數(shù)

DelayXms.h

#ifndef __DELAYXMS_H__
#define __DELAYXMS_H__

#define u16 unsigned int  //宏定義
#define u8  unsigned char//數(shù)據(jù)范圍0--255
	
void DelayXms(u16 xms);

#endif

DelayXms.c

/*****************************
功能：延時(shí)x毫秒
*****************************/
#include "DelayXms.h"

void DelayXms(u16 xms)
{
	u16 i,j; //unsigned int 類(lèi)型的數(shù)據(jù)范圍0-65535
	for(i=xms;i>0;i--){		
		for(j=124;j>0;j--);
	}	
}

共陰極數(shù)碼管底層顯示驅(qū)動(dòng)

display.h

#ifndef __DISPLAY_H__
#define __DISPLAY_H__

#include 
#include "DelayXms.h"

#define GPIO_SEG P1  //段碼 IO
#define GPIO_BIT P3  //位選 IO
#define N  4         //數(shù)碼管的個(gè)數(shù)

extern u8 LEDBuf[];//外部引用申明（DisplayService.c會(huì)用到這個(gè)變量）
void Display();

#endif

display.c

#include "display.h"
u8 code leddata[]={ //共陰極數(shù)碼管的段碼表
0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F, //0-9【下標(biāo)0-9】
0x77,0x7C,0x39,0x5E,0x79,0x71,      //  A-F【下標(biāo)10-15】
0x76,0x38,0x37,0x3e,0x73,0x5c,0x40,//h,l,n,u,p,o,-【下標(biāo)16-22】
0xff
};

u8 LEDBuf[]={23,23,23,23};//數(shù)據(jù)顯示緩沖區(qū),
u8 code BitCode[]={0xfe,0xfd,0xfb,0xf7};//位選控制信號(hào) 

void Display()
{
	/*靜態(tài)局部變量生命周期：程序結(jié)束為止
	可以保持變量?jī)?nèi)容的持久性，函數(shù)調(diào)用結(jié)束時(shí)
	變量的值仍在*/
	
	static u8 i =  0;
	//1.送段碼
	GPIO_SEG =  leddata[LEDBuf[i]];
	//2.送位選
	GPIO_BIT =  BitCode[i];
	//3.1ms<延時(shí)<10ms
	DelayXms(9);
	//4.消影
	GPIO_SEG = 0x00;//不消影顯示會(huì)出問(wèn)題
	
	i++;
	if(N == i)//條件控制
		i=0;
}

底層按鍵驅(qū)動(dòng)

Key.h

#ifndef __KEY_H__
#define __KEY_H__

#include 
#include "DelayXms.h"

sbit key1 = P2^0;
sbit key2 = P2^1;
sbit key3 = P2^2;
sbit key4 = P2^3;

u8 Key_Scan();//按鍵掃描

#endif

Key.c

#include "Key.h"

u8 Key_Scan()
{
	u8 KeyNum = 0;
    key1 =1;key2=1;key3=1;key4=1;
	if(!key1 || !key2 || !key3 ||!key4)//1.判斷是否有按鍵按下
	{
		DelayXms(10);//2.延時(shí)消抖 10ms
		if(!key1 || !key2 || !key3 ||!key4)//3.再次判斷按鍵是否按下
		{
			if(!key1)
				KeyNum = 1; //4.給按鍵開(kāi)關(guān)賦一個(gè)鍵值
			if(!key2)
				KeyNum = 2;
			if(!key3)
				KeyNum = 3;
			if(!key4)
				KeyNum = 4;
			while(!key1 || !key2 || !key3 ||!key4);//5.松手等待
		}
			
	}
	
	return KeyNum;
}

應(yīng)用層---顯示服務(wù)函數(shù)

DisplayService.h

#ifndef __DISPLAYSERVICE_H__
#define __DISPLAYSERVICE_H__

#include "Display.h"

extern u8 parm1 ; //外部引用聲明
extern u8 parm2 ;//KeyService.c會(huì)用到
extern u8 parm3 ;
extern u8 parm4 ;
extern u8 windowNum;//KeyService.c會(huì)用到
void DisplayService();

#endif

DisplayService.c

#include "DisplayService.h"

u8 parm1 = 11; //初始顯示的數(shù)據(jù)
u8 parm2 = 22;
u8 parm3 = 33;
u8 parm4 = 44;
u8 windowNum = 0;//窗口變量
void DisplayService()
	{
		 
		switch(windowNum)
		{
			case 0:
				LEDBuf[0] = 20;//底層顯示驅(qū)動(dòng)中段碼表中的下標(biāo)20 顯示字母P
				LEDBuf[1] = 1;//顯示數(shù)字1
				LEDBuf[2] = parm1/10;//顯示十位上的數(shù)據(jù)
				LEDBuf[3] = parm1%10;//顯示個(gè)位上的數(shù)據(jù)
			
				break;
			case 1:
				LEDBuf[0] = 20;
				LEDBuf[1] = 2;
				LEDBuf[2] = parm2/10;
				LEDBuf[3] = parm2%10;
			
				break;
			case 2:
				LEDBuf[0] = 20;
				LEDBuf[1] = 3;
				LEDBuf[2] = parm3/10;
				LEDBuf[3] = parm3%10;
			
				break;
			case 3:
				LEDBuf[0] = 20;
				LEDBuf[1] = 4;
				LEDBuf[2] = parm4/10;
				LEDBuf[3] = parm4%10;
			
				break;
			default: 
				break;
		}
			
		
	}

應(yīng)用層--按鍵服務(wù)函數(shù)

KeyService.h

#ifndef __KEYSERVICE_H__
#define __KEYSERVICE_H__

#include "Key.h"
#include "Display.h"
#include "DisplayService.h"

void Key_Service();

#endif

KeyService.c

#include "KeyService.h"

void Key_Service()
{
	switch(Key_Scan())
	{
		case 1:   //按鍵key1選擇窗口，共4個(gè)窗口
			windowNum++;//每按一下按鍵，窗口變量加1
			if(windowNum>3)   //條件控制
				windowNum = 0;//最后一個(gè)窗口銜接到第一個(gè)窗口
			break;
		case 2: //按鍵key2對(duì)窗口中的數(shù)據(jù)執(zhí)行加1操作
			switch(windowNum)//用switch語(yǔ)句判斷對(duì)第幾個(gè)窗口進(jìn)行操作
			{
				case 0:  //第一個(gè)窗口中的數(shù)據(jù)
					parm1++;
					if(parm1 > 99)//只能顯示2位數(shù)，超過(guò)99,需要置0
						parm1 =0;
					break;
				case 1://第二個(gè)窗口中的數(shù)據(jù)
					parm1++;
					if(parm2 > 99)
						parm2 =0;
					break;
				case 2: //第三個(gè)窗口中的數(shù)據(jù)
					parm3++;
					if(parm3 > 99)
						parm3 =0;
					break;
				case 3://第四個(gè)窗口中的數(shù)據(jù)
					parm4++;
					if(parm4 > 99)
						parm4 =0;
					break;
				default: break;
			}
			break;
		case 3: //按鍵key3對(duì)窗口中的數(shù)據(jù)執(zhí)行減1操作
			switch(windowNum)//用switch語(yǔ)句判斷對(duì)第幾個(gè)窗口進(jìn)行操作
			{
				case 0:
					parm1--;
					if(parm1 > 99)//變量parm范圍0-255，自減小于0會(huì)變成255
						parm1 =99; 
					break;
				case 1:
					parm1--;
					if(parm2 > 99)
						parm2 =99;
					break;
				case 2:
					parm3--;
					if(parm3 > 99)
						parm3 =99;
					break;
				case 3:
					parm4--;
					if(parm4 > 99)
						parm4 =99;
					break;
				default: break;
			}
			break;
		case 4: //按鍵key4對(duì)窗口中的數(shù)據(jù)置0
			switch(windowNum)//用switch語(yǔ)句判斷對(duì)第幾個(gè)窗口進(jìn)行操作
			{
				case 0: 
					parm1=0;
					break;
				case 1:
					parm2=0;
					break;
				case 2:
					parm3=0;

					break;
				case 3:
					parm4=0;
				
					break;
				default: break;
			}
			break;
		default: break;
	}
}

main函數(shù)

main.c

#include "KeyService.h"

void main()
{
	u16 temp;
	for(temp=0;temp<100;temp++)
	{
		Display();//上電顯示一段時(shí)間畫(huà)面
	}
	
	while(1)
	{
		DisplayService();
		Key_Service();
		Display();
		
	}
	
}