Resolved! the code from st example
I2C_Cmd(sEE_I2C, ENABLE); /* sEE_I2C configuration after enabling it */ I2C_Init(sEE_I2C, I2C_SPEED, I2C_SLAVE_ADDRESS7, I2C_Mode_I2C, I2C_DutyCycle_2, I2C_Ack_Enable, I2C_AcknowledgedAddress_7bit);do the init order have some problem? ...