writesda.c

一个AVR单片机at17c85的系统程序

// WriteSDA.c

#include "at17c.h"
 
void WriteSDA(unsigned char state) {

    if (state)        
        DDRB &= 0xfe; // input ... pullup will pull high or slave will drive low
    else
        DDRB |= 0x01; // output ... port latch will drive low

}