I2CWRITE on a 24LC512

[Dave]

oslinux , I have used the 24lc512, 24lc515, 24lc1025 in pairs, to date with out any problem. One thing I did find is that if you are running interrupts during the read or write process I would sometimes have incorrect data ether read or written to the EEPROM. I disable all interrupts during the write process and I haven't had any problems since....

Dave Purola,
N8NTA

[oslinux]

no i'm not using interrupts, but aniway i've placed a DISABLE before the write...

[GioppY]

Try to split the word in 2 bytes;

i2cwrite Sda,Scl,Ctrw,Addr,[TmpW.highbyte]
pause 10
Addr = Addr + 1
i2cwrite Sda,Scl,Ctrw,Addr,[TmpW.lowbyte]
pause 10
Addr = Addr + 1

Ciao

[Jerson]

Hoping all is well with the hardware, you need to break the addr part into 2 bytes.

I2cwrite SDA,SCL,CONTROL,I.HighByte, I.LowByte, [W0]

I use this in my design and it works correctly with a 24c512

Jerson

[oslinux]

Solved Solved Solved Solved


i tried splitting the address in two with no success, but

i changed the resistors from 0,5W to 0,125W, from 2.2K to 4.7K and now it's working well!

Thank you all for your support!

Luca

[mister_e]

it make no real sense but if it's working...

How many years/decade/century your Proto-Board (breadboard) have?

[oslinux]

it's a breadboard from 4 years ago if i remember well, but it has been used for a lot of projects, and not only with wires of the right width!

I'll use my new proto-board in a better way, I PROMISE