/* The function is used to Get APB1 clock and the UNIT is in Hz.  */
unsigned long SysCtlAPB1ClockGet(void)
/* The function is used to Get APB1 clock and the UNIT is in Hz.  */
unsigned long SysCtlAPB1ClockGet(void)
{
    unsigned long ulTemp,ulAPB1Clock;
    ulAPB1Clock = SysCtlHClockGet();
    ulTemp = (xHWREG(RCC_CFGR) & RCC_CFGR_PPRE1_M) >> RCC_CFGR_PPRE1_S;
    ulTemp = (unsigned long)g_APBAHBPrescTable[ulTemp];
    ulAPB1Clock = ulAPB1Clock >> ulTemp;
    return ulAPB1Clock;
}