sdspiFemto for 128k EEPROMs?

David Betz

Has anyone modified the sdspiFemto EEPROM read/write code to handle larger than 16 bit addresses? I'd like to use those routines to read/write the 128k EEPROM on the Hydra.

Cluso99

There are objects in the OBEX that can access the eeprom. IIRC the 128KB eeprom is effectively 2 x 64KB eeproms. i.e. the address bits A0-2 are effectively used here to address the blocks within the eeprom. You will need to look at the 24LC1024 specs to see how this works.

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Mike Green

sdspiFemto already handles EEPROMs up to 128K bytes in size. As Cluso99 mentioned, these are treated as two 64K byte EEPROMs. sdspiFemto (and Basic_I2C_Driver) can handle up to 512K of EEPROM (8 x 64K) on an I2C bus as described in the comments at the beginning of the object.