//ICC-MSP application builder [F149] : 11/24/2010 3:45:20 PM
//Target 14x device
#include <msp430x16x.h>
#include <msp430def.h>
#include <stdio.h>
#include <math.h> 

volatile  unsigned int sample[32];
void clock(void)
{
 WDTCTL = WDTPW +WDTHOLD;                  // Stop Watchdog Timer
  DCOCTL = DCO0 + DCO1 + DCO2;             // Max DCO
  BCSCTL1 = RSEL0 + RSEL1 + RSEL2;         // XT2on, max RSEL
  BCSCTL2 |= SELS;                         // SMCLK = XT2
    while(1)
  {
  }
} 
void port_init()
{
 P1OUT=0x00;
 P1DIR=0x00;
 P1IES=0x00;
 P1IE=0x00;
 P1SEL=0x00;
 P2OUT=0x00;
 P2DIR=0x00;
 P2IES=0x00;
 P2IE=0x00;
 P2SEL=0x00;
 P3OUT=0x00;
 P3DIR=0x00;
 P3SEL=0x00;
 P4OUT=0x00;
 P4DIR=0x00;
 P4SEL=0x00;
 P5OUT=0x00;
 P5DIR=0x00;
 P5SEL=0x00;
 P6OUT=0x00+BIT2;
 P6DIR=0x04;
 P6SEL=0x00;
}
void timera_init()
//Clock source=SMCLK
//Divider=1
//TIMACLK=4.0000MHz
//Frequency=19.048KHz ( 52.50uS)
{
 TACTL=0x00; //stop timer
 //channel0
 TACCTL0=0x14;//TAOM0.1,TAOM0.0,TACCIE0,TAOUT0
  TACCR0=0xD2;
 //channel1
 TACCTL1=0x00;
 TACCR1=0x00;
 //channel2
 TACCTL2=0x00;
 TACCR2=0x00;
 TAR=0x0000;//clear timer counter
 TACTL=0x216;//TASSEL.1,TAMC.0,1,TAIE
}

void adc12_init()
{
 ADC12CTL0=0x00;
 ADC12CTL1=0x616;//SHS.0,SHP,ADC12SSEL.1,CONSEQ.1,CONSEQ.0
 ADC12IE=0x8000;
 ADC12CTL0=0xFFF2;//SHT1.3,SHT1.2,SHT1.1,SHT1.0,SHT0.3,SHT0.2,SHT0.1,SHT0.0,ADC12MSC,ADC122_5V,ADC12REFON,ADC12ON,ADC12ENC
}

void usart0_init()
//Clock source=SMCLK
//Desired baud=19200
//Actual  baud=19196
{
 UCTL0=0x10;//CHAR0
 UTCTL0=0x20;//SSEL0.1
 URCTL0=0x08;//URXEIE0
 U0BR1=0x00;
 U0BR0=0xD0;
 UMCTL0=0xA2;
}

//call this routine to initialise all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 DINT(); //disable all interrupts
 ME1=0X00; //disable sfr peripherals
 ME2=0X00; 
 IE1=0x00; //disable sfr interrupts
 IE2=0x00; 
 //watchdog initialisation including nmi function
 //WDTCTL=0x5A00 | 0x00;
 WDTCTL=0x5A00 | 0x10;//TMSEL
 //initialise other peripherals

 port_init();
 
 timera_init();
 adc12_init();
 usart0_init();
 clock();

 ME1=0xC0;
 ME2=0x00;
 IE1=0x00;
 IE2=0x00;
 EINT(); //re-enable interrupts
}

//interrupt handlers 

void init_adc12(void)
{
 ADC12CTL0=SHT0_15+SHT1_15+ADC12ON+REFON+MSC; 
 ADC12CTL1=CONSEQ_2+ADC12SSEL_2+ADC12DIV_0+SHP+SHS_1+CSTARTADD_0;
 ADC12MCTL0=ADC12MCTL1=ADC12MCTL2=ADC12MCTL3=SREF_1+INCH_9;
 ADC12MCTL4=ADC12MCTL5=ADC12MCTL6=ADC12MCTL7=SREF_1+INCH_9;
 ADC12MCTL8=ADC12MCTL9=ADC12MCTL10=ADC12MCTL11=SREF_1+INCH_9;
 ADC12MCTL12=ADC12MCTL13=ADC12MCTL14=SREF_1+INCH_9;	
 ADC12MCTL15=SREF_1+INCH_9+EOS;	//Vr+=Vref+;//ADC12MEM15 is End Of Sequence
 ADC12IE = 0x8000;     // Enable ADC12IFG0=>ADC12MEM0 //after 16 sequence conversions ADC12MEM15 sets
 ADC12CTL0|=ENC;     //Enable conversions
}//end adc12

void init_timera(void)
 { 
   	TACCTL0 = OUTMOD_1;
	TACCTL0 = CCIE;
	TACCR0=0xD2;
  	TACTL = TASSEL_2 + MC_1; 
}
	
//interrupt handlers 

void main(void)
{
 
 init_devices();
 init_adc12();
 init_timera();
}// end for main


#pragma interrupt_handler timera_0_isr:TIMERA0_VECTOR
void timera_0_isr(void)
{
volatile  unsigned int a;

while(1)
	{
	   ADC12CTL0|=ADC12SC;
	   while ((ADC12IFG & 0x8000)==0); // CHECK FOR CONVERSIONS
	   sample[a]=ADC12MEM0;//Access results
	} 
  	 
}