24c02存储多个数据

24c02存储多个数据#includereg51.h#includeintrins.h#defineuintunsignedint#defineucharunsignedcharsbitsda=P2^0;//IO口定义sbitscl=P2^1;//此为待写入24c02的数据。为了便于验证结果，数组的内容为周期重复的。charcodemusic[]={0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0,0x55,0xaa,0x0f,0xf0};//由于最后还要讲这些数据读出送到P1口，故可发现P1口相连的led有规律地闪烁15个周期uchardatabuffer[100];//用于缓存从24c02中读取的数据。delay(unsignedintm){unsignedintn,p;for(n=m;n0;n--)for(p=125;p0;p--);}voidnop(){_nop_();_nop_();}/////////24C02读写驱动程序////////////////////voiddelay1(unsignedintm){unsignedintn;for(n=0;nm;n++);}voidinit()//24c02初始化子程序{scl=1;nop();sda=1;nop();}voidstart()//启动I2C总线{sda=1;nop();scl=1;nop();sda=0;nop();scl=0;nop();}voidstop()//停止I2C总线{sda=0;nop();scl=1;nop();sda=1;nop();}voidwritebyte(unsignedcharj)//写一个字节{unsignedchari,temp;temp=j;for(i=0;i8;i++){temp=temp1;scl=0;nop();sda=CY;//temp左移时，移出的值放入了CY中nop();scl=1;//待sda线上的数据稳定后，将scl拉高nop();}scl=0;nop();sda=1;nop();}unsignedcharreadbyte()//读一个字节{unsignedchari,j,k=0;scl=0;nop();sda=1;for(i=0;i8;i++){nop();scl=1;nop();if(sda==1)j=1;elsej=0;k=(k1)|j;scl=0;}nop();return(k);}voidclock()//I2C总线时钟{unsignedchari=0;scl=1;nop();while((sda==1)&&(i255))i++;scl=0;nop();}////////从24c02的地址address中读取一个字节数据/////unsignedcharread24c02(unsignedcharaddress){unsignedchari;start();writebyte(0xa0);clock();writebyte(address);clock();start();writebyte(0xa1);clock();i=readbyte();stop();delay1(100);return(i);}//////向24c02的address地址中写入一字节数据info/////voidwrite24c02(unsignedcharaddress,unsignedcharinfo){start();writebyte(0xa0);clock();writebyte(address);clock();writebyte(info);clock();stop();delay1(5000);//这个延时一定要足够长，否则会出错。因为24c02在从sda上取得数据后，还需要一定时间的烧录过程。}voidmain(){ucharadd,i,j,m;init();//初始化24C02P1=0X55;while(add!=sizeof(music)){write24c02(0x00+add,music[add]);add++;if(add%4==0)P1=~P1;}P1=0X00;//到此为止，向24C02中写入数据的过程均已结束。下面的程序为附加的。//将已写入的数据再读出，送到P1口，通过观察led的亮灭来检验写入的数据是否正确。while(m!=add){buffer[i]=read24c02(m);i++;m++;}while(j!=add){P1=buffer[j];j++;delay(1000);}while(1);}