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the I2c of STM32F100C8T6B don't work

Question asked by abdelmagid.amr on Nov 11, 2013
Latest reply on Nov 12, 2013 by knik
we are trying to make a communication between the Mc and the Accelerometer

I see that the clock and data don't work right 
as on the scope I see the data and clock transitions are making together in the same time while the data must be settled before the rise edge of the clock 

attached image from the scope to the signal 

also I tried to make I22 using bit banging but the rise time and fall time of the port is 20Micro second which is exceed the max rise and fall time 
how to make this time less than 300 nano second