Write error across page boundary with AT24C512 #3
Description
I have a Mega2560 connected to the AT24C512 using the I2C interface. Pullups (2.1K) are on SDL and SDA.
I'm using Put to store a 17-byte structure to EEPROM memory, starting at address 1. The first 3 records are fine, but the 4th record which should go to byte 68, stops writing at byte 63. This is with a page size of 64. Changing the page size to 128 will work until it hits byte 127, then stops writing. If I write a single byte to any of these locations, that works as expected. The only change to settings was going from 64 to 128 for the page size.
Code snippets:
struct eRecordType {
float Vout1;
float Vout2;
float Vout3;
float Vout4;
byte ValidRec;
};
eRecordType eRecord; //variables used
ExternalEEPROM ExtMem;
ExtMem.put(addr,eRecord); //where addr = 52 for page=64 or 120 for page=128
Attached are memory dumps where the same data is written until the page boundary is hit.
memory dumps.txt