/* The function is used to Set Clock Output source.  */
void SysCtlClkOututSrcSet(unsigned long ulClkOutSrc)
/* The function is used to Set Clock Output source.  */
void SysCtlClkOututSrcSet(unsigned long ulClkOutSrc)
{
    xASSERT((ulClkOutSrc == SYSCTL_OUTPUT_CLKSRC_BUS)||
            (ulClkOutSrc == SYSCTL_OUTPUT_CLKSRC_LPO)||
            (ulClkOutSrc == SYSCTL_OUTPUT_CLKSRC_MCGIRCLK)||
            (ulClkOutSrc == SYSCTL_OUTPUT_CLKSRC_OSCERCLK));
    xHWREG(SIM_SOPT2) &= ~SIM_SOPT2_CLKOUTSEL_M;
    xHWREG(SIM_SOPT2) |= ulClkOutSrc;
}