my I2C interface is no longer working. Not sure the reason (maybe I shorted Vcc).
How do I know it is the i2c interface? When measuring SCL pin with my osciloscope I read something around 400mV. Considering that it has a pull-up resistor I should read 5V (Am I wrong?). There is no signal variation when I activate Wire in my code.
SDA is constantly at 5V.
Do you have any sugestion or should I change my ATMEGA1280 chip?