STC12C5A60S2_EEPROM

综述

没啥好说的，之前都没用过。

EEPROM涉及的寄存器

IAP_DATA_IAP_ADDRH_IAP_ADDRL

IAP_CMD

IAP_CONTR

IAP_TRIG

例子

eeprom.c

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#include "eeprom.h"

void forSafety()
{
	IAP_CONTR = 0;
	IAP_CMD = 0;
	IAP_TRIG = 0;
	IAP_ADDRH = 0x80;
	IAP_ADDRL = 0;
	
}

void eraseSector (unsigned char addr)
{
	
	IAP_CONTR = ENABLE_IAP;		//open IAP function and wait time
	IAP_CMD = CMD_ERASE;		//ERASE command
	IAP_ADDRL = addr;
	IAP_ADDRH = addr>>8;
	IAP_TRIG = 0x5a;			//start IAP
	IAP_TRIG = 0xa5;
	
	_nop_();					//mcu will wait here until EEPROM finish
	
	forSafety();
}

void programByte(unsigned char addr,unsigned char dat)
{
	IAP_CONTR = ENABLE_IAP;
	IAP_CMD = CMD_PROGRAM;		//Program  command
	IAP_ADDRL = addr;
	IAP_ADDRH = addr>>8;
	IAP_DATA = dat;
	IAP_TRIG = 0x5a;			//start IAP
	IAP_TRIG = 0xa5;
	
	_nop_();			//mcu will wait here until EEPROM finish
	
	forSafety();
}
unsigned char readByte (unsigned char addr)
{

	unsigned char dat;
	IAP_CONTR = ENABLE_IAP;		//open IAP function and wait time
	IAP_CMD = CMD_READ;		//read command
	IAP_ADDRL = addr;
	IAP_ADDRH = addr>>8;
	IAP_TRIG = 0x5a;			//start IAP
	IAP_TRIG = 0xa5;
	
	_nop_();            //mcu will wait here until EEPROM finish
	dat = IAP_DATA;
	forSafety();
	return dat;
}

eeprom.h

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#ifndef __EEPROM_H
#define __EEPROM_H

#include <reg52.h>
#include <intrins.h>

sfr IAP_DATA = 0xc2;
sfr IAP_ADDRH = 0xc3;
sfr IAP_ADDRL = 0xc4;
sfr IAP_CMD = 0xc5;
sfr IAP_TRIG = 0xc6;
sfr IAP_CONTR = 0xc7;


#define CMD_IDLE  0 
#define CMD_READ 1
#define CMD_PROGRAM 2 
#define CMD_ERASE 3 

#define ENABLE_IAP 0x83

#define IAP_ADDRESS 0x0000

void forSafety();
void eraseSector (unsigned char addr);
void programByte(unsigned char addr,unsigned char dat);
unsigned char readByte (unsigned char addr);
#endif


main.c

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#include "main.h"


void delay10ms(void)   
{
    unsigned char a,b;
    for(b=202;b>0;b--)
        for(a=147;a>0;a--);
}

void Init_UART()
{
	SCON = 0x5a;
	TMOD = 0x20;
	AUXR = 0x40;
	TH1 = TL1 = 0xfd;	// 115200MHZ
	TR1 = 1;
}

void send_UART(unsigned char dat)
{
	while(!TI);
	TI = 0;
	SBUF = dat;

}	


void main()
{
	int  i ;
	Init_UART();
	LED2 = 1;
	LED1 = 0;
	eraseSector(IAP_ADDRESS);
	
	for(i = 0;i<512;i++)
	{
		if(readByte(IAP_ADDRESS+i)!=0xff)
		{	
			LED2 = 0;
			LED1 = 1;
		}
	}
	delay10ms();
	
	for(i = 0;i<512;i++)
	{
		programByte(IAP_ADDRESS+i,(unsigned char)i);
	}
	delay10ms();
	
	for(i = 0;i<512;i++)
	{
		send_UART(readByte(IAP_ADDRESS+i));
	}
	
	
	
	while(1);
}

main.h

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#ifndef __MAIN_H
#define __MAIN_H

#include <reg52.h>
#include "eeprom.h"

sbit LED1 = P3^0;
sbit LED2 = P3^1;
sfr AUXR = 0x8e;

#endif