单片机温控系统(7)

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i +=2;

write1302(0x8e,0x80); /* 控制命令,WP=1,写保护*/ }

//功能: 读取DS1302当前时间 void get1302(void) {

unsigned char i,time_bcd_temp[6]; unsigned char ucAddr = 0x81; for (i=0;i<7;i++) {

time_bcd_temp[i] = read1302(ucAddr);/*格式为: 秒 分 时 日 月 星期 年 */ ucAddr += 2; }

sec=time_bcd_temp[0]; min=time_bcd_temp[1]; hou=time_bcd_temp[2]; day=time_bcd_temp[3]; mon=time_bcd_temp[4]; yea=time_bcd_temp[6]; }

//连续6字节读出程序

void ds1302_read(unsigned char *ptr,unsigned char addr) {

unsigned char i;

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}

addr=addr*2+0x0c1; for(i=0;i<6;i++) {

*(ptr+i)=read1302(addr); addr+=2; }

//连续6字节写入程序

void ds1302_write(unsigned char *ptr,unsigned char addr) { }

void Start1302(void) {

unsigned char temp; bit ea; ea=EA; EA=0;

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unsigned char i;

addr=addr*2+0x0c0;

write1302(0x8e,0x00); //写保护置低（关闭） for(i=0;i<6;i++) {

write1302(addr,*(ptr+i)); addr+=2; }

write1302(0x8e,0x80); //写保护置高(打开)

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temp=read1302(0x81); temp&=0x7f;

write1302(0x8e,0x00); /* 控制命令,WP=0,写操作*/ write1302(0x80,temp); write1302(0x90,0);

write1302(0x8e,0x80); /* 控制命令,WP=1,写保护*/ EA=ea; }

//DS1302驱动程序结束

三、数据存储底层驱动程序

//ATC256引脚定义 sbit epr_sd=P3^3; sbit epr_sc=P3^2;

bdata unsigned char temp1; sbit temp1_0 = temp1^0; sbit temp1_7 = temp1^7;

//存储器驱动程序开始 void noack(void) {

epr_sd=1;

epr_sc=1; epr_sc=1; epr_sc=1; epr_sc=0; }

void ask() {

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unsigned char i=0xff; epr_sd=1; epr_sc=1; epr_sc=1; epr_sc=1; do{

i--;

if(epr_sd==0) { epr_sc=0; i=0;

}

}while(i!=0); epr_sd=1; epr_sd=1; epr_sd=1; }

void stop() {

epr_sd=0; epr_sd=0; epr_sd=0; epr_sc=1; epr_sc=1; epr_sc=1; epr_sd=1; epr_sd=1; epr_sd=1; epr_sd=1;

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}

///24c256 start void start() {

epr_sc=1; epr_sd=1; epr_sd=1;

epr_sd=0; epr_sd=0; epr_sc=0; }

void wrby(unsigned char x)

{ unsigned char i; epr_sc=0; }

//////////////24c256 rdby

unsigned char rdby() //从高位开始读出数据

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temp1=x;

for(i=0;i<8;i++) //从高位开始传送数据 {

epr_sd=temp1_7;

temp1=temp1<<1; //左移一位 epr_sc=1; epr_sc=1; epr_sc=1; epr_sc=1; epr_sc=0; }