eeprom.cpp

00001 // eeprom.cpp file
00002 #include "eeprom.h"
00003 
00004 
00005 
00006 void freq(uint32_t frec)
00007 {
00008     i2c.frequency(frec);
00009 }
00010 
00011 int write_data(uint8_t eepr_addr, uint16_t address, uint8_t *ptr_string)
00012 {
00013     wait_ms(4);
00014     i2c.start();
00015     int ack=i2c.write(eepr_addr<<1);
00016     if(ack==1) {
00017         i2c.write(address<<8);
00018         i2c.write(address);
00019         for(int i =0; i<4 ;i++) {
00020             i2c.write(ptr_string[i]);
00021         }
00022         i2c.stop();
00023         return 1;//success
00024     } else if(ack==0) {
00025         return 0;//NACK
00026     } else if(ack==2) {
00027         return 2;//TIMEOUT
00028     }
00029     return -1;
00030 }
00031 
00032 
00033 uint8_t data_read(uint8_t eepr_addr, uint16_t address_read)
00034 {
00035     wait_ms(5);
00036     uint8_t read;
00037     i2c.start();
00038     int ack=i2c.write(eepr_addr<<1);
00039     //pc.printf("ack= %d \n",ack);
00040     if(ack==1) {
00041         i2c.write(address_read<<8);
00042         i2c.write(address_read);
00043         i2c.start();
00044         i2c.write(eepr_addr<<1|0x01);
00045         read=i2c.read(0);
00046         i2c.stop();
00047         return read;
00048     }
00049     return -1;
00050 }