Can't communicate with MPU-9150

Projects General Guidance
1

Hi,

I made a custom PCB for a school project. It contains an ATmega2560, some circuitry and a MPU-9150 motion Sensor. The board works, i can program it via ISP, UART also works, but the MPU-9150 wont respond at all. I tried the I2C scanner and the example sketch from Pansentis library https://github.com/Pansenti/MPU9150Lib. So what am I doing wrong? BTW: I removed the level translator chip and bridged the I2C lines (marked red in my schematic).

Moritz

IL_SCH.pdf (144 KB)

2

This is all I get from the oscilloscope: Please help me I have to get it working until february!

thanks in advance,
Moritz

DS1Z_QucikPrint2.png
DS1Z_QucikPrint2.png800×480 42 KB