6 years, 1 month ago.

I2C showing a Device on every address on STM32F769I-Disco

Hi,

Hopefully someone can help me with this as its really confusing me :S

Basically i can not get I2C to work on my STM32F769I-Disco, so i ran a I2C scanner on my board that i found on the MBed code DB. and it returns saying that it gets a response from a device on every address from 0x00 to 0x7f :S

I've tried it on both available I2C channels on the board and it does the same for Both.

I've also tried a few different I2C scanners that are on the MBed code db and they all do the same, they all show a device on every i2c address :S

i've removed everything that is connected so its just the board on its own, and same thing :(. I've tried pulling the pins High with nothing connected. same thing. i've tried pulling them low, again same thing :S

i'm not sure what else i can try, could both i2c channels be faulty. but if it was faulty wouldn't it just constantly show no devices and not that a device responds to every address?

Hopefully someone can help me as this has been confusing me for a few days now :(