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

 float sample, CDEG, FDEG, XIN,Y,SIGK;
 float XIN7 = 25, XIN6 = 25, XIN5 = 25;
 float XIN4 = 25, XIN3 = 25, XIN2 = 25, XIN1 = 25;
 const float A = 0.0612, A1 = 21.5927, B = 2.41799;
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;
      
  //  The sensor signal is brought in on the A to D
  // converter at ADC12MEM6;
  
    XIN = ((sample*A) - A1)/B;   
    
  //  Filter the signal with a 4th order moving average
  //  filter.   
       
   
   SIGK = (XIN + XIN4 + XIN5 + XIN6 + XIN7 + XIN1 + XIN2 + XIN3)*0.125;
     XIN7 = XIN6;    
     XIN6 = XIN5; 
     XIN5 = XIN4;
     XIN4 = XIN3;
     XIN3 = XIN2;
     XIN2 = XIN1;
     XIN1 = XIN;
    
   CDEG = (SIGK);       //converting from Kelvin to deg C
   FDEG =  1.8*CDEG + 32.0;           // converting from deg C to deg F
   
   lcd_word(100*CDEG, 2);            // the l00 moves the position of CDEG
                                    // on the display 2 positions to the left
                                    
   //lcd_char(1,' ');               // The 1 corresponds to the second position from
                                    // the right on thedisplay.  The ' ' places a 
                                    // space in this position.  Take out if you want
                                    // a decimal with the temperature display.
                                    
   lcd_char(0,'C');                 // The 0 corresponds to the first positin on the
                                    // right side of the display.  The 'C' causes a C
                                    // to be displayed in this position
                                    
   wait_ms(2000);                   // Waits 200 milliseconds then displays deg F
   
   lcd_word(100*FDEG, 2);           // The l00 moves the position of FDEG on
                                    // the display, 2 positions to the left
                                    
   //lcd_char(1,' ');               // See the above statement
   
   lcd_char(0, 'F');                // See the above statement
   
   wait_ms(2000);                   // Wait 2000 milliseconds.  The program then moves
                                    // back to lcd_word(100*CDEG, 0) and continues as
                                    // a loop  
                                    
  }                                                                  
                                    
                                  
                                                                  
   
    
   
 
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