SparkFun Forums

[Yemen4u2]

I'm attempting to use the EEPROM to store values that take up too much space in RAM. I'm programming in Arduino Code on the ATtiny85 microcontroller. According to the Arduino documentation this is how you write values to the EEPROM:

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#include <EEPROM.h>

void setup()
{
  EEPROM.write(0, 1);
  EEPROM.write(1, 0);
  EEPROM.write(2, 3);
  EEPROM.write(3, 2);
  EEPROM.write(4, 1);

}

However when I attempted to access those values with the

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EEPROM.read(0);

the program that had originally worked with hard coded values suddenly stopped working. After some further debugging I have begun to think that the values are either my code is wrong or the EEPROM can't be accessed with Arduino code.

I can't find an answer in the datasheets so I was hoping someone on here could let me know if the ATtiny85 forces us to use AVR studio to access the EEPROM.

[DanV]

Well, clearly, you didn't do anything with the EEPROM.Read() function - it returns an unsigned byte.

You would more properly do this:
something := EEPROM.read(0)

then, that something carries the value with it.

[lyndon]

Well, I have a tiny85 that's running code built in the Arduino IDE and saving/retrieving so clearly it works. I use the gcc functions, not the Arduino wrapper.

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uint8_t temp = eeprom_read_byte(&_tempLoc);