iic_24c02.zip_24c02 IIC_c51 24C02

#include "iic.h" static void SCK_W(unsigned char x) {SCK = x;} static void SDA_W(unsigned char x) {SDA = x;} static unsigned char SDA_R(void) {return SDA;} void iic_start(void) { SDA_W(1); SCK_W(1); SDA_W(0); SCK_W(0); } void iic_stop(void) { SDA_W(0); SCK_W(1); SDA_W(1); } void iic_ack(void) { SDA_W(1); SCK_W(1); SCK_W(0); } void iic_write_byte(unsigned char byte) { unsigned char i; for(i=0;i<8;i++) { SDA_W(byte & 0x80); byte <<= 1; SCK_W(1); SCK_W(0); } } unsigned char iic_read_byte(void) { unsigned char i,buf; for(i=0;i<8;i++) { SCK_W(1); buf <<= 1; buf |= SDA_R(); SCK_W(0); } return buf; }