// This program reads from 2 A/D channels (channels 7 and 10). 
// Channel 7 is connected to a potentiometer on the E5 I/O board,
//   if the voltage is greater than half the maximum, an LED lights.
// Channel 10 is connected to a temperature sensor on the chip.
//
// If you run the program and turn the pot, the LED goes on and off.
// If you pause the program, you can examine the current values of
//   the two A/D channels in the variables adval_7 and adval_10.
//
// You don't have to worry about the details of the code that drives
//   the A/D conversion sequence.

#include "msp430F2012.h"

void main(void){
int adval_7, adval_10;
 
 	// Initialization (don't worry about this block of code).
    WDTCTL = WDTPW + WDTHOLD; // Stop WDT
    BCSCTL1 = CALBC1_1MHZ;    // Set clock to 1 MHZ
    DCOCTL = CALDCO_1MHZ;
    //Turn ADC on, slow sample for temp sensor, 2.5V ref;
    ADC10CTL0 = ADC10ON + ADC10SHT_3 + SREF_1 + REF2_5V + REFON;   
    
    P1DIR |= BIT0;            // Make bit 0 an output.

    while (1) {
        ADC10CTL0 &= ~ENC;             // Disable conversions
        ADC10CTL1 = INCH_7;            // Set to channel 7 (Potentiometer)
        ADC10CTL0 |= ENC + ADC10SC;    // Enable and Start conversion
        while (ADC10CTL1 & ADC10BUSY); // Wait for conversion to finish
        adval_7 = ADC10MEM;            // Get A/D conversion result

        // If A/D result > 50% (i.e., 1.25V), turn on LED, else turn it off.
        if (adval_7 > 0x1FF) P1OUT |= BIT0;  else P1OUT &= ~0x01;
 

        ADC10CTL0 &= ~ENC;             // Disable conversions
        ADC10CTL1 = INCH_10;           // Set to channel 10 (Temp)
        ADC10CTL0 |= ENC + ADC10SC;    // Enable and Start conversion
        while (ADC10CTL1 & ADC10BUSY); // Wait for conversion to finish
        adval_10 = ADC10MEM;           // Get A/D conversion result
    }
}