The register access mechanism for the Master subsystem leaves something to be desired. It introduces room for errors and the logic used to mask out bits in order to set register values. That being said, TI makes up for that inadequacy with the peripheral driver library for the Master subsystem of the Concerto devices. This peripheral driver library contains drivers that make it easy to get started using any of the peripherals on the device right out of the box with an evaluation board. Many of the actual EPIs in the driver library are compatible between the Stellaris software bundle and the Concerto software bundle in the ControlSUITE. So caution should be used when porting applications between the two platforms.