[嵌入式]蓝桥杯eeprom读写和储存上电次数

图片中前面两位数由按下S5加一，按下S4减一，最后按下S6储存在eeprom中，不按不储存。而图片后面两位数是自动储存上电次数，每上电加一，按下S7清零。

main.c文件

#include "stc15f2k60s2.h"
#include "iic.h"
typedef unsigned char u8;
typedef unsigned int u16;
u8 code duan[12]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,
				  0x82,0xf8,0x80,0x90,0xff,0xbf};
u8 temp=0;
u8 dat=0;				  
				  
void delay(u16 i)
{
	while(i--);
}

void Chan_hc573(chose)
{
	switch(chose)
	{
		case 4:
			P2 = ( P2 & 0x1f ) | 0x80; break;
		case 5:
			P2 = ( P2 & 0x1f ) | 0xa0; break;
		case 6:
			P2 = ( P2 & 0x1f ) | 0xc0; break;
		case 7:
			P2 = ( P2 & 0x1f ) | 0xe0; break;
	}
	P2 = ( P2 & 0x1f ) | 0x00;
}

void Smg_display(u8 com,u8 dat)
{
	P0=0xff;
	Chan_hc573(7);
	P0=0x01<<com;
	Chan_hc573(6);
	P0=dat;
	Chan_hc573(7);
}

void Close_smg()
{
	P0=0x00;
	Chan_hc573(6);
	P0=0xff;
	Chan_hc573(7);
}

void Display_temp()
{
	Smg_display(0,duan[dat/10]); delay(500);
	Smg_display(1,duan[dat%10]); delay(500);
	Smg_display(2,duan[10]); delay(500);
	Smg_display(3,duan[10]); delay(500);
	Smg_display(4,duan[10]); delay(500);
	Smg_display(5,duan[10]); delay(500);
	Smg_display(6,duan[temp/10]); delay(500);
	Smg_display(7,duan[temp%10]); delay(500);
	Close_smg();
}

void key_down()
{
	if(P30==0)
	{
		delay(500);
		if(P30==0)
		{
			while(P30==0) {Display_temp();}
			temp=0;
			eeprom_wire(0x00,temp);
		}
	}
	if(P31==0)
	{
		delay(500);
		if(P31==0)
		{
			while(P31==0) {Display_temp();}
			eeprom_wire(0x01,dat);
		}
	}
	if(P32==0)
	{
		delay(500);
		if(P32==0)
		{
			while(P32==0) {Display_temp();}
			if(dat!=99) {dat++;}
		}
	}
	if(P33==0)
	{
		delay(500);
		if(P33==0)
		{
			while(P33==0) {Display_temp();}
			if(dat!=0) {dat--;}
		}
	}
}

void Init_system()
{
	P0=0x00;
	Chan_hc573(5);
	P0=0xff;
	Chan_hc573(4);
	Close_smg();
}

void main()
{
	Init_system();
	temp=eeprom_read(0x00);
	dat=eeprom_read(0x01);
	temp++;
	eeprom_wire(0x00,temp);
	while(1)
	{
		key_down();
		Display_temp();
	}
}

iic.c文件

#include "reg52.h"
#include "intrins.h"
#include "iic.h"

#define DELAY_TIME 5

#define SlaveAddrW 0xA0
#define SlaveAddrR 0xA1

//×ü??òy???¨ò?
sbit SDA = P2^1;  /* êy?Y?? */
sbit SCL = P2^0;  /* ê±?ó?? */

void IIC_Delay(unsigned char i)
{
    do{_nop_();}
    while(i--);        
}
//×ü?????ˉì??t
void IIC_Start(void)
{
    SDA = 1;
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SDA = 0;
    IIC_Delay(DELAY_TIME);
    SCL = 0;	
}

//×ü??í￡?1ì??t
void IIC_Stop(void)
{
    SDA = 0;
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SDA = 1;
    IIC_Delay(DELAY_TIME);
}

//·￠?íó|′e
void IIC_SendAck(bit ackbit)
{
    SCL = 0;
    SDA = ackbit;  					// 0￡oó|′e￡?1￡o·?ó|′e
    IIC_Delay(DELAY_TIME);
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SCL = 0; 
    SDA = 1;
    IIC_Delay(DELAY_TIME);
}

//μè′yó|′e
bit IIC_WaitAck(void)
{
    bit ackbit;
	
    SCL  = 1;
    IIC_Delay(DELAY_TIME);
    ackbit = SDA;
    SCL = 0;
    IIC_Delay(DELAY_TIME);
    return ackbit;
}

//í¨1yI2C×ü??·￠?íêy?Y
void IIC_SendByte(unsigned char byt)
{
    unsigned char i;

    for(i=0; i<8; i++)
    {
        SCL  = 0;
        IIC_Delay(DELAY_TIME);
        if(byt & 0x80) SDA  = 1;
        else SDA  = 0;
        IIC_Delay(DELAY_TIME);
        SCL = 1;
        byt <<= 1;
        IIC_Delay(DELAY_TIME);
    }
    SCL  = 0;  
}

//′óI2C×ü??é??óê?êy?Y
unsigned char IIC_RecByte(void)
{
    unsigned char i, da;
    for(i=0; i<8; i++)
    {   
    	SCL = 1;
	IIC_Delay(DELAY_TIME);
	da <<= 1;
	if(SDA) da |= 1;
	SCL = 0;
	IIC_Delay(DELAY_TIME);
    }
    return da;    
}

unsigned char eeprom_read(unsigned char addr)
{
	unsigned char dat;
	IIC_Start();
	IIC_SendByte(0xa0);
	IIC_WaitAck();
	IIC_SendByte(addr);
	IIC_WaitAck();
	IIC_Stop();
	
	IIC_Start();
	IIC_SendByte(0xa1);
	IIC_WaitAck();
	dat=IIC_RecByte();
	IIC_SendAck(1);
	IIC_Stop();
	return dat;
}

void eeprom_wire(unsigned char addr,unsigned char dat)
{
	
	IIC_Start();
	IIC_SendByte(0xa0);
	IIC_WaitAck();
	IIC_SendByte(addr);
	IIC_WaitAck();
	IIC_SendByte(dat);
	IIC_WaitAck();
	IIC_Stop();
}

iic.h文件

#ifndef _IIC_H
#define _IIC_H

unsigned char eeprom_read(unsigned char addr);
void eeprom_wire(unsigned char addr,unsigned char dat);

#endif