Part Number:F28M35H52C
Tool/software: Code Composer Studio
The function SysCtlClockGet of driverlib returns a wrong value when a fractional PLL multiplier is used. In my application, a multiplier of 18.75 and a base frequency of 8 MHz returned 126 MHz instead of the correct 75 MHz.
This is because the input parameter ulClockIn to SysCtlClockGet doubles as return value of the function, and has been changed when the fraction is calculated.