24c01-24c16读写驱动程序

查看[code]sbit a0=ACC^0; //定义ACC的位，利用ACC操作速度最快

sbit a1=ACC^1;

sbit a2=ACC^2;

sbit a3=ACC^3;

sbit a4=ACC^4;

sbit a5=ACC^5;

sbit a6=ACC^6;

sbit a7=ACC^7;

void s24(void) {

_nop_();scl=0;sda=1;scl=1;_nop_();sda=0;_nop_();scl=0;

}

void s240(void) {

_nop_();scl0=0;sda0=1;scl0=1;_nop_();sda0=0;_nop_();scl0=0;

}

void p24(void) {

sda=0;scl=1;_nop_();sda=1;

}

void p240(void) {

sda0=0;scl0=1;_nop_();sda0=1;

}

unsigned char rd24(void) {

sda=1;

scl=1;a7=sda;scl=0;

scl=1;a6=sda;scl=0;

scl=1;a5=sda;scl=0;

scl=1;a4=sda;scl=0;

scl=1;a3=sda;scl=0;

scl=1;a2=sda;scl=0;

scl=1;a1=sda;scl=0;

scl=1;a0=sda;scl=0;

sda=1;scl=1;scl=0;

return(ACC);

}

void wd24(unsigned char dd) {

ACC=dd;

sda=a7;scl=1;scl=0;

sda=a6;scl=1;scl=0;

sda=a5;scl=1;scl=0;

sda=a4;scl=1;scl=0;

sda=a3;scl=1;scl=0;

sda=a2;scl=1;scl=0;

sda=a1;scl=1;scl=0;

sda=a0;scl=1;scl=0;

sda=1;scl=1;

}

unsigned char read(unsigned int address){

unsigned char dd;

dd=((address&0x7ff)/256)<<1;

s24();wd24(0xa0|dd);scl=0;wd24(address);scl=0;

s24();wd24(0xa1|dd);scl=0;dd=rd24();p24();return(dd);

}

void write(unsigned int address,unsigned char dd){

unsigned char ddd;

ddd=((address&0x7ff)/256)<<1;

s24();wd24(0xa0|ddd);scl=0;wd24(address);scl=0;wd24(dd);scl=0;p24();

time=0;                 //time为定时器时间参考，time增加1代表1ms,如果没有用定时器，取消该行

while (1) {

    s24();

    wd24(0xa0|ddd);

    sda=1;

    if (sda==0) break;

    if (time>10) break; //此行防止由于eeprom器件损坏后的死循环

    scl=0;

}

}[/code]