TIMERS DEMOQE

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#include <hidef.h> /* for EnableInterrupts macro */
#include "derivative.h" /* include peripheral declarations */
 
#define TPM_INPUT_CLK   20000     //8MHz
 
 
 void Init_Config_Clock(void){
 
 /* Common initialization of the write once registers */
  /* SOPT1: COPE=0,COPT=1,STOPE=0,RSTOPE=0,BKGDPE=1,RSTPE=0 */
  SOPT1 = 0x42;                                      
  /* SPMSC1: LVDF=0,LVDACK=0,LVDIE=0,LVDRE=1,LVDSE=1,LVDE=1,BGBE=0 */
  SPMSC1 = 0x1C;                                      
  /* SPMSC2: LPR=0,LPRS=0,LPWUI=0,PPDF=0,PPDACK=0,PPDE=1,PPDC=0 */
  SPMSC2 = 0x02;                                      
  /* SPMSC3: LVDV=0,LVWV=0,LVWIE=0 */
  SPMSC3 &= (unsigned char)~0x38;                     
  /*  System clock initialization */
  if (*(unsigned char*far)0xFFAF != 0xFF) { /* Test if the device trim value is stored on the specified address */
    ICSTRM = *(unsigned char*far)0xFFAF; /* Initialize ICSTRM register from a non volatile memory */
    ICSSC = (unsigned char)((*(unsigned char*far)0xFFAE) & (unsigned char)0x01); /* Initialize ICSSC register from a non volatile memory */
  }
  /* ICSC1: CLKS=0,RDIV=0,IREFS=0,IRCLKEN=0,IREFSTEN=0 */
  ICSC1 = 0x00;                        /* Initialization of the ICS control register 1 */
  /* ICSC2: BDIV=0,RANGE=0,HGO=0,LP=0,EREFS=1,ERCLKEN=0,EREFSTEN=0 */
  ICSC2 = 0x04;                        /* Initialization of the ICS control register 2 */
  while(!ICSSC_OSCINIT) {              /* Wait until the initialization of the external crystal oscillator is completed */
  }
  /* ICSSC: DRST_DRS=0,DMX32=0 */
  ICSSC &= (unsigned char)~0xE0;       /* Initialization of the ICS status and control */
  while((ICSSC & 0xC0) != 0x00) {      /* Wait until the FLL switches to Low range DCO mode */
  }
  /* SCGC1: TPM3=1,TPM2=1,TPM1=1,ADC=1,IIC2=1,IIC1=1,SCI2=1,SCI1=1 */
  SCGC1 = 0xFF;                                      
  /* SCGC2: DBG=1,FLS=1,IRQ=1,KBI=1,ACMP=1,RTC=1,SPI2=1,SPI1=1 */
  SCGC2 = 0xFF;         
 
}
 
 
 
 
 void TPM_Init(void) 
 {
    TPM3SC = 0x02;
 
 
    return;
 }
 
 
 
 char TPM_Config(unsigned char Freq, char Duty) 
{
   unsigned int Mod = TPM_INPUT_CLK;
   unsigned long Cnt = 0x00;
 
   if(Freq > 256){
 
    return 0;
   }else{
 
    Mod /= Freq;
 
 
   TPM3MOD = Mod;
 
   TPM3C0SC = 0x24;
 
   Cnt = (unsigned long)(Mod * Duty);
   Cnt /= 100;
 
   TPM3C0V = (int)Cnt;
 
 
 
   return 1;
   }
}
 
void TPM_Start(void) 
{
    TPM3CNT = 0;
    TPM3SC |= 0x0C;         //bus clock, divided by 8
 
  return;
}
 
void TPM_Stop(void) 
{
   char Dummy;
 
   Dummy = TPM3SC;
   TPM3SC &= 0x67;         //bus clock, divided by 8
 
  return;
}
 
 
 
void main(void) {
 
  EnableInterrupts; /* enable interrupts */
  /* include your code here */
   Init_Config_Clock();
 
 
 
TPM_Init();
  TPM_Config(10,50);
   TPM_Start();
  for(;;) {
 
 
 
  } /* loop forever */
 
  /* please make sure that you never leave main */
}