#include <msp430x44x.h>
#include "lcd.h"
#include "delay.h"

signed int sample;
const float A = 0.061;

void main(void)
{ 
  // clock config
  WDTCTL = WDTPW + WDTHOLD;             // Stop WDT

  // set up Basic Timer
  IE2 |= BTIE;                            // Enable BT interrupt
  BTCTL = BT_ADLY_2000 | BT_fLCD_DIV256;  // 128 Hz LCD, 2s Interrupt       

  // set up ADC
  ADC12IE |= 0x0040;                 // Enable ADC6 interrupt
  ADC12CTL0 = ADC12ON + REF2_5V + REFON;          // Aref = 2.5V, Aref on
  ADC12CTL1 = CSTARTADD_6 + ADC12SSEL_1 + SHP;        // ADCCLK = ACLK, pulse mode;
  ADC12MCTL6 = SREF_1 + INCH_6;         // Select sixth reg, Aref on, Aref = Vref+,Avss
  ADC12CTL0 |= ENC ;
  
  //set port pins
                        //set P6.6/A6 as input
  P6SEL |= BIT6;                        //select adc function

  //call lcd func
  setupLCD();

   // Enable interrupts and go to sleep forever
  _EINT();                              // Enable interrupts
 // _BIS_SR(LPM3_bits);                   // Enter LPM4
  while(1);                             // NOP
}

// Basic Timer interrupt service routine
interrupt[BASICTIMER_VECTOR] void basic_timer(void) {

     ADC12CTL0 |= ADC12SC;   // start conversion
}

 // ADC interrupt service routine
interrupt[ADC_VECTOR] void adc(void) {

  sample = ADC12MEM6;
  sample = sample * A;
  lcd_word(sample,2);
}