/* The function is used to lock protected registers.  */
xtBoolean SysCtlKeyAddrLock(void)
/* The function is used to lock protected registers.  */
xtBoolean SysCtlKeyAddrLock(void)
{
    xHWREG(GCR_REGLOCK) = 0x00;
    return xHWREG(GCR_REGLOCK)&0x01;
}