飞思卡尔XS128锁相环设置（网上找的，很好用）

long5313828 · 发表于 2011-2-5 16:57:02

/****************************************************************
Code Warrior 5.0
Target : MC9S12XS128
Crystal: 16.000Mhz

******************************************************************/

#include <hidef.h>    /* common defines and macros */
#include <MC9S12XS128.h>    /* derivative information */
#pragma LINK_INFO DERIVATIVE "mc9s12xs128"
void delayms(int ms)
{
int ii,jj;
if (ms<1) ms=1;
for(ii=0;ii<ms;ii++)
   for(jj=0;jj<3338;jj++); //40MHz--1ms
}
void SetBusCLK_16M(void)
{
CLKSEL=0X00;             // disengage PLL to system
PLLCTL_PLLON=1;          // turn on PLL
SYNR=0x00 | 0x01;    // VCOFRQ[7:6];SYNDIV[5:0]
                     // fVCO= 2*fOSC*(SYNDIV + 1)/(REFDIV + 1)
                     // fPLL= fVCO/(2 × POSTDIV)
                     // fBUS= fPLL/2
                     // VCOCLK Frequency Ranges  VCOFRQ[7:6]
                     // 32MHz <= fVCO <= 48MHz 00
                     // 48MHz <  fVCO <= 80MHz 01
                     // Reserved                10
                     // 80MHz <  fVCO <= 120MHz 11
REFDV=0x80 | 0x01;  // REFFRQ[7:6];REFDIV[5:0]
                     // fREF=fOSC/(REFDIV + 1)
                     // REFCLK Frequency Ranges  REFFRQ[7:6]
                     // 1MHz <= fREF <=  2MHz    00
                     // 2MHz <  fREF <=  6MHz    01
                     // 6MHz <  fREF <= 12MHz    10
                     // fREF >  12MHz             11
                     // pllclock=2*osc*(1+SYNR)/(1+REFDV)=32MHz;
POSTDIV=0x00;    // 4:0, fPLL= fVCO/(2xPOSTDIV)
                     // If POSTDIV = $00 then fPLL is identical to fVCO (divide by one).
_asm(nop);       // BUS CLOCK=16M
_asm(nop);
while(!(CRGFLG_LOCK==1));    //when pll is steady ,then use it;
CLKSEL_PLLSEL =1;             //engage PLL to system;
}
void SetBusCLK_32M(void)
{
CLKSEL=0X00;             // disengage PLL to system
PLLCTL_PLLON=1;          // turn on PLL
SYNR =0x40 | 0x03;  // pllclock=2*osc*(1+SYNR)/(1+REFDV)=64MHz;
REFDV=0x80 | 0x01;
POSTDIV=0x00;
_asm(nop);       // BUS CLOCK=32M
_asm(nop);
while(!(CRGFLG_LOCK==1));    //when pll is steady ,then use it;
CLKSEL_PLLSEL =1;             //engage PLL to system;
}
void SetBusCLK_40M(void)
{
CLKSEL=0X00;             //disengage PLL to system
PLLCTL_PLLON=1;          //turn on PLL
SYNR =0xc0 | 0x04;
REFDV=0x80 | 0x01;
POSTDIV=0x00;    //pllclock=2*osc*(1+SYNR)/(1+REFDV)=80MHz;
_asm(nop);       //BUS CLOCK=40M
_asm(nop);
while(!(CRGFLG_LOCK==1));    //when pll is steady ,then use it;
CLKSEL_PLLSEL =1;             //engage PLL to system;
}
void SetBusCLK_48M(void)
{
CLKSEL=0X00;             //disengage PLL to system
PLLCTL_PLLON=1;          //turn on PLL
SYNR =0xc0 | 0x05;
REFDV=0x80 | 0x01;
POSTDIV=0x00;    //pllclock=2*osc*(1+SYNR)/(1+REFDV)=96MHz;
_asm(nop);       //BUS CLOCK=48M
_asm(nop);
while(!(CRGFLG_LOCK==1));    //when pll is steady ,then use it;
CLKSEL_PLLSEL =1;             //engage PLL to system;
}
void SetBusCLK_64M(void)
{
CLKSEL=0X00;             //disengage PLL to system
PLLCTL_PLLON=1;          //turn on PLL
SYNR =0xc0 | 0x07;
REFDV=0x80 | 0x01;
POSTDIV=0x00;    //pllclock=2*osc*(1+SYNR)/(1+REFDV)=128MHz;
_asm(nop);       //BUS CLOCK=64M
_asm(nop);
while(!(CRGFLG_LOCK==1));    //when pll is steady ,then use it;
CLKSEL_PLLSEL =1;             //engage PLL to system;
}
void SetBusCLK_80M(void)
{
CLKSEL=0X00;             //disengage PLL to system
PLLCTL_PLLON=1;          //turn on PLL
SYNR =0xc0 | 0x09;
REFDV=0x80 | 0x01;
POSTDIV=0x00;    //pllclock=2*osc*(1+SYNR)/(1+REFDV)=160MHz;
_asm(nop);       //BUS CLOCK=80M
_asm(nop);
while(!(CRGFLG_LOCK==1));    //when pll is steady ,then use it;
CLKSEL_PLLSEL =1;             //engage PLL to system;
}
void SetBusCLK_88M(void)
{
CLKSEL=0X00;             //disengage PLL to system
PLLCTL_PLLON=1;          //turn on PLL
SYNR =0xc0 | 0x0a;
REFDV=0x80 | 0x01;
POSTDIV=0x00;    //pllclock=2*osc*(1+SYNR)/(1+REFDV)=176MHz;
_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;
}