sendisp.c

将串口收到的数据存放在STC89C52的EEPROM

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

#define READ_ISP	 		0x01
#define WRITE_ISP 		0x02
#define ERASE_ISP 		0x03

sfr isp_data 	= 0xe2;
sfr isp_addrh 	= 0xe3;
sfr isp_addrl 	= 0xe4;
sfr isp_cmd 	= 0xe5;
sfr isp_trig	= 0xe6;
sfr isp_contr   = 0xe7;

unsigned short address=0x2000;
unsigned char  last = 0x00;
bit flag = 0;

void delay(unsigned short time)
{
	unsigned char i,j,a;
	unsigned short k;

	for(k=0;k<time;k++)
	 for(i=0;i<8;i++)
	  for(j=0;j<91;j++)
	   {
	 	 a=a+2;
	   }

}

void serial(void) interrupt 4
{
	unsigned char receive,high,low;

	if(RI)
	{
		receive = SBUF;

		high = address/256;
		low = address%256;

		isp_contr = 0x80;	  //依次为：（开机）年、月、日、时、分、秒、（关机）年、月、日、时、分、秒、0x2e
		isp_cmd = WRITE_ISP;		
		isp_addrh = high;
		isp_addrl = low;
		isp_data = receive;
		EA = 0;
		isp_trig = 0x46;
		isp_trig = 0xb9;
		_nop_();
		EA = 1;
		isp_contr = 0x00;
		isp_cmd = 0x00;
		isp_trig = 0x00;

		address++;

		RI = 0;
		if(receive==0x50) last++;
		if(last==3)		flag = 1;

		SBUF =receive;
		while(!TI);
		TI = 0;

	}
}

void main(void)
{
	code unsigned char buf[3]="ISP";			//debug mode
	unsigned char j,temp;
	//unsigned short day,minute,bgday,bgminute,enday,endminute;

	TMOD = 0x20;					//串口初始化
	TH1 = 0xf4;
	TL1 = 0xf4;
	PCON = 0x00;
	TR1= 1;
	SCON = 0x50;
	EA = 1;
	ES = 1;

	//watch_dog = 0x37;				//初始化看门狗，溢出时间为2.2755s

		for(j=0;j<3;j++)
		{
			temp = buf[j];
			SBUF = temp;
			while(!TI);
			TI = 0;
	
		}
			SBUF = '\n';
			while(!TI);
			TI = 0;
			delay(1000);

	while(!flag);

	SBUF = 'K';
	while(!TI);
	TI = 0;

	isp_contr   = 0x60;

	while(1);

}