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I2C Start Problem on STM32F205

Question asked by fisher.nate on Aug 30, 2014
Latest reply on Sep 3, 2014 by fisher.nate
I am attempting to communicate via I2C to another ST device (LPS331AP) and read its sensor values. However, I am not able to initiate the I2C session properly. On the wire, I can see that the start signal is actually manipulating the clock line as well (you can see a simultaneous dip on both lines in my attachment). The result appears to show the master (STM32) zeroing the MSB of the intended slave address. The master appears to be addressing 0x38, while the slave address should be 0xB8. 

Screen%20Shot%202014-08-29%20at%203.46.44%20PM.png



Any idea why this may be? Thanks

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