ok. now i have this code:
#include <Wire.h>
void i2c_eeprom_write_byte( int deviceaddress, unsigned int eeaddress, byte data ) {
int rdata = data;
Wire.beginTransmission(deviceaddress);
Wire.send((byte)(eeaddress >> 8)); // MSB
Wire.send((byte)eeaddress&255);
Wire.send(rdata);
Wire.endTransmission();
}
// WARNING: address is a page address, 6-bit end will wrap around
// also, data can be maximum of about 30 bytes, because the Wire library has a buffer of 32 bytes
void i2c_eeprom_write_page( int deviceaddress, unsigned int eeaddresspage, byte* data, byte length ) {
Wire.beginTransmission(deviceaddress);
Wire.send((byte)(eeaddresspage >> 8)); // MSB
Wire.send((byte)eeaddresspage&255);
byte c;
for ( c = 0; c < length; c++)
Wire.send(data[c]);
Wire.endTransmission();
}
byte i2c_eeprom_read_byte( int deviceaddress, unsigned int eeaddress ) {
byte rdata = 0xFF;
Wire.beginTransmission(deviceaddress);
Wire.send((byte)(eeaddress >> 8)); // MSB
Wire.send((byte)eeaddress&255); // LSB
Wire.endTransmission();
Wire.requestFrom(deviceaddress,1);
if (Wire.available()) rdata = Wire.receive();
return rdata;
}
// maybe let's not read more than 30 or 32 bytes at a time!
void i2c_eeprom_read_buffer( int deviceaddress, unsigned int eeaddress, byte *buffer, int length ) {
Wire.beginTransmission(deviceaddress);
Wire.send((byte)(eeaddress >> 8)); // MSB
Wire.send((byte)eeaddress&255); // LSB
Wire.endTransmission();
Wire.requestFrom(deviceaddress,length);
int c = 0;
for ( c = 0; c < length; c++ )
if (Wire.available()) buffer[c] = Wire.receive();
}
void setup()
{
Wire.begin();
Serial.begin(9600);
i2c_eeprom_write_byte(0x50,00,145);
delay(50);
i2c_eeprom_write_byte(0x50,01,146);
delay(50);
i2c_eeprom_write_byte(0x50,02,147);
delay(50);
i2c_eeprom_write_byte(0x50,03,148);
delay(50);
i2c_eeprom_write_byte(0x50,04,149);
delay(50);
i2c_eeprom_write_byte(0x50,05,150);
delay(50);
Serial.println("DOne");
}
int n = 0;
void loop()
{
}
It seems that no matter what address i use as eeaddress the writing is done to byte 0
How can i fix this?