这个程序大概什么意思，逐句求解一下！
/*Enable Function for PSC0*/

void PSC0_lPSC_enable(unsigned int PD, unsigned int LPSC_num) {

*(unsigned int*) (PSC0_MDCTL+4*LPSC_num) = (*(unsigned int*) (PSC0_MDCTL+4*LPSC_num) & 0xFFFFFFE0) | 0x0003;
PSC0_PTCMD = 0x1<<PD;
while( (PSC0_PTSTAT & (0x1<<PD) ) !=0) ; /*Wait for power state transition to finish*/
while( (*(unsigned int*)(PSC0_MDSTAT+4 * LPSC_num) & 0x3F) !=0x3);
}

/*Enable Function for PSC1*/

void PSC1_lPSC_enable(unsigned int PD, unsigned int LPSC_num) {

*(unsigned int*) (PSC1_MDCTL+4*LPSC_num) = (*(unsigned int*) (PSC1_MDCTL+4*LPSC_num) & 0xFFFFFFE0) | 0x0003;
PSC1_PTCMD = 0x1<<PD;
while( (PSC1_PTSTAT & (0x1<<PD) ) !=0) ; /*Wait for power state transition to finish*/
while( (*(unsigned int*)(PSC1_MDSTAT+4 * LPSC_num) & 0x3F) !=0x3);
} 此帖出自小平头技术问答