#include "include.h"#define FAIL 1 #define SUCC 0bit ack = 0; //bit定義的變量僅有0和1 unsigned char shi1; unisgned char fen1; unsigned char miao1; unsigned char send[3] = 0;void iic_start() {SDA = 1;SCL = 1;delay_us(1);SDA = 0;delay_us(1);SCL = 0; }void iic_stop() {SDA = 0;SCL = 1;delay_us(1);SDA = 1;delay_us(1);SCL = 0; }void iic_send_byte(unsigned char byte) {unsigned char i;for(i = 0; i < 8; i++){SDA = byte & 0x80;SCL = 1;delay_us(1);SCL = 0;byte <<= 1;}SCL = 1;SDA = 1;delay_us(1);if(0 == SDA){ack = 1;}else{ack = 0;}SCL = 0; // return ack; } unsigned char iic_rec_byte() {unsigned char i,a;unsigned char temp = 0;SDA = 1;for(i = 0; i < 8; i++){SCL = 0;delay_us(1);SCL = 1;if(SDA){a = 0x01;}else{a = 0;}temp |= (a << 7-i);delay_us(1);}SCL = 0;return temp; } void iic_ack() {SDA = 0;SCL = 1;delay_us(1);SCL = 0; } void iic_noack() {SDA = 1;SCL = 1;delay_us(1);SCL = 0; } unsigned char AT24C02_send_str(unsigned char devadd, unsigned char romadd, unsigned char *s, unsigned char num) {unsigned char i;iic_start();iic_send_byte(devadd);if(0 == ack){return FAIL;}iic_send_byte(romadd);if(0 == ack){return FAIL;}for(i = 0; i < num; i++){iic_send_byte(*s);if(0 == ack){return FAIL;}s++;}iic_stop();return SUCC; }unsigned char AT24C02_rec_str(unsigned char devadd, unsigned char romadd, unsigned char *s, unsigned char num) {unsigned char i;iic_start();iic_send_byte(devadd);if(0 == ack){return FAIL;}iic_send_byte(romadd);if(0 == ack){return FAIL;}iic_start();iic_send_byte(devadd+1);for(i = 0; i < num - 1; i++){*s = iic_rec_byte();iic_ack();s++;}*s = iic_rec_byte();iic_noack();iic_stop();return SUCC; }void get_back() {static unsigned char rec[3] = 0;AT24C02_rec_str(0xae,100,rec,3);shi1 = rec[0];fen1 = rec[1];miao1 = rec[2]; }void eeprom_init() {send[0] = shi1;send[1] = fen1;send[2] = miao1;AT24C02_send_str(0xae,100,send,3); }

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