I2C different rate support
Currently set to 100kHZ. //! If the parameter \e bFast is \b true, then the master block is set up to //! transfer data at 400 Kbps; otherwise, it is set up to transfer data at //! 100 Kbps. If Fast Mode Plus (1 Mbps) is desired, software should manually //! write the I2CMTPR after calling this function. For High Speed (3.4 Mbps) //! mode, a specific command is used to switch to the faster clocks after the //! initial communication with the slave is done at either 100 Kbps or //! 400 Kbps.