锁相环(2)

??? _asm(nop); //BUS CLOCK=88M ??? _asm(nop);

??? while(!(CRGFLG_LOCK==1)); //when pll is steady ,then use it; ??? CLKSEL_PLLSEL =1; //engage PLL to system; ??? } ???

??? void SetBusCLK_96M(void) ??? {

??? CLKSEL=0X00; //disengage PLL to system ??? PLLCTL_PLLON=1; //turn on PLL ??? SYNR =0xc0 | 0x0b; ??? REFDV=0x80 | 0x01;

??? POSTDIV=0x00; //pllclock=2*osc*(1+SYNR)/(1+REFDV)=192MHz; ??? _asm(nop); //BUS CLOCK=96M ??? _asm(nop);

??? while(!(CRGFLG_LOCK==1)); //when pll is steady ,then use it; ??? CLKSEL_PLLSEL =1; //engage PLL to system; ??? } ???

??? void SetBusCLK_104M(void) ??? {

??? CLKSEL=0X00; //disengage PLL to system ??? PLLCTL_PLLON=1; //turn on PLL ??? SYNR =0xc0 | 0x0c; ??? REFDV=0x80 | 0x01;

??? POSTDIV=0x00; //pllclock=2*osc*(1+SYNR)/(1+REFDV)=208MHz; ??? _asm(nop); //BUS CLOCK=104M ??? _asm(nop);

??? while(!(CRGFLG_LOCK==1)); //when pll is steady ,then use it; ??? CLKSEL_PLLSEL =1; //engage PLL to system; ??? } ???

??? void SetBusCLK_120M(void) ??? {

??? CLKSEL=0X00; //disengage PLL to system ??? PLLCTL_PLLON=1; //turn on PLL ??? SYNR =0xc0 | 0x0d; ??? REFDV=0x80 | 0x01;

??? POSTDIV=0x00; //pllclock=2*osc*(1+SYNR)/(1+REFDV)=240MHz; ??? _asm(nop); //BUS CLOCK=120M ??? _asm(nop);

??? while(!(CRGFLG_LOCK==1)); //when pll is steady ,then use it; ??? CLKSEL_PLLSEL =1; //engage PLL to system; ??? }

???

??? void main(void) ??? { ???

??? EnableInterrupts; ???

??? for(;;) ??? {

??? _asm(nop); ??? } ??? }

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