#include <hidef.h> /* for EnableInterrupts macro */
#include "derivative.h" /* include peripheral declarations */

void cpmu_init(void);
void delay(long int time);
int gSPI;
void write_spi(int data);
void read_spi(void);
void spi0init(void);
int tx = 'a';


void cpmu_init(void)
{
	// Wait for stable supply after power up
	while (GDUF_GLVLSF)
		GDUF_GLVLSF = 1;
	
	CPMUREFDIV_REFDIV = 7;		// 8MHz => 2MHz
	CPMUREFDIV_REFFRQ = 0;		// 0 for 1MHz - 2MHz
	CPMUSYNR_SYNDIV = 49; 		// 100 MHz VCO output
	CPMUSYNR_VCOFRQ = 1;
	CPMUPOSTDIV_POSTDIV = 0;	// 100MHz
	
	CPMUCLKS_PLLSEL = 1;	//PLL Select Bit
	CPMUOSC_OSCE = 1;
	
	CPMUVREGCTL_INTXON = 0;	// Internal VDDX regulator off
	CPMUVREGCTL_EXTXON = 1; // External VDDX regulator on
	
	CPMUHTCTL_VSEL = 0;	//Voltage Access Select Bit
	CPMUHTCTL_HTE = 1;	//High Temperature Sensor/Bandgap Voltage Enable Bit
	
	// Wait for oscillator to start up (UPOSC=1) and PLL to lock (LOCK=1).
	while (CPMUIFLG_UPOSC == 0) {};
	while (CPMUIFLG_LOCK == 0) {};
	CPMURFLG  = 0x60; 	//Clear PORF and LVRF
}


void delay(long int time)		
{
  while(time>0){--time;}
} 

void read_spi(void){

  while(!SPI0SR_SPIF){};
    
  gSPI= SPI0DR;
  
  
/*  if(gSPI == 0x01){
	    LED_GREEN =  1;
	    LED_RED  =  0;
  }
  else if(gSPI == 0x02){
	    LED_GREEN =  0;
	    LED_RED  =  1;
  }*/
}

void write_spi(int data){

     while(!SPI0SR_SPTEF){};
     SPI0DR = data;
  
}

void spi0init(void){
	MODRR0_SPI0RR = 1;
	SPI0CR1 = 0x5E;
	SPI0CR2 = 0x50;
	SPI0BR = 0x77;
}
void main(void) {

 // EnableInterrupts;
	cpmu_init();
	 
	 spi0init();
	 
	 

  for(;;) {
    __RESET_WATCHDOG();	/* feeds the dog */
    write_spi(tx);
    delay(3000);
    
  } /* loop forever */
  /* please make sure that you never leave main */

}