#include "msp430g2231.h"
#include "inttypes.h"
#include "stdlib.h"
#include "stdio.h"

#define LED1  BIT0                                              // red Led
#define LED2  BIT6                                              // green Led
#define TXD   BIT1                                              // TXD on P1.1
#define Bitime 104                                              // 9600 Baud, SMCLK=1MHz (1MHz/9600)=104

uint8_t BitCnt;                                                 // Bit count, used when transmitting byte
char TXByte;
int integer;
char string[20];


                                                   // TXByte via UART when Transmit() is called

// Function Definitions
void Transmit (void);
void sendChar (char c);
void UartPutS (char *s);


void main (void)
{
    WDTCTL = WDTPW + WDTHOLD;                                   // Stop watchdog timer

    BCSCTL1 = CALBC1_1MHZ;                                      // Set range
    DCOCTL = CALDCO_1MHZ;                                       // SMCLK = DCO = 1MHz
    P1SEL |= TXD + BIT3;
    P1DIR |= TXD + BIT6 + BIT4 + BIT0;
    P1DIR |= 0x41;                                              // Set P1.0, P1.6 to output direction
    P1IE |= 0x08;                                               // P1.3 interrupt enabled
    P1IES |= 0x08;                                              // P1.3 Hi/lo edge
    P1IFG &= ~0x08;
    

//AD Wandelung

		
	ADC10CTL0 = ADC10ON + REFON + REF2_5V + SREF_1;	
	//ADC10CTL0 = ADC10SHT_2 | ADC10ON | REFON | REF2_5V;
								// Input channel 1, trigger using ADC10SC bit , no clock division ,
								// internal ADC clock , single channel single conversions
	ADC10CTL1 = INCH_3 | SHS_0 | ADC10DIV_0 | ADC10SSEL_0 | CONSEQ_0;
	ADC10AE0 = BIT3; 			// Enable analog input on channel 1
	ADC10CTL0 |= ENC; 			// Enable conversions
	
	
	
	for (;;)
{
	
	ADC10CTL0 |=ADC10SC; 		// Trigger new conversion
	
	while ((ADC10CTL1 & ADC10BUSY) == ADC10BUSY) 
	{
	 							// Loop while conversion takes place
		if (ADC10MEM >= BIT9)   // Is output in top half of range?
		{
			P1OUT = BIT6; 				// Yes: Turn LED on
		} 
		else 
		{
			P1OUT = 0; 				// No: Turn LED off
		}		
	}
	
	
	sprintf(string, "\n%d string", ADC10MEM);

	P1IFG &= ~0x08;                                             // P1.3 IFG cleared
    P1OUT ^= (LED1 + LED2);                                     // Toggle Led if key is pressed
    __bis_SR_register(GIE);
    UartPutS (string); 




    __bis_SR_register(GIE);                                     // interrupts enabled

}
}


void UartPutS (char *s)
{
    while (*s) {
        sendChar (*s++);
    }
}

void sendChar (char c)
{
    TXByte = c;
    Transmit ();
    __delay_cycles (50);                                        // ~ 60 µSec.
}

void Transmit (void)
{
    CCTL0 = OUT;                                                // TXD Idle as Mark
    TACTL = TASSEL_2 + MC_2;                                    // SMCLK, continuous mode
    BitCnt = 0xA;                                               // Load Bit counter, 8 bits + ST/SP
    CCR0 = TAR;
    CCR0 += Bitime;                                             // Set time till first bit
    TXByte |= 0x100;                                            // Add stop bit to TXByte (which is logical 1)
    TXByte <<= 1;                                               // Add start bit (which is logical 0)
    CCTL0 =  CCIS0 + OUTMOD0 + CCIE;                            // Set signal, intial value, enable interrupts
    while (CCTL0 & CCIE);                                       // Wait for TX completion
    TACTL = TASSEL_2;                                           // SMCLK, timer off (for power consumption)
}

// Timer A0 interrupt service routine
#pragma vector=TIMERA0_VECTOR
__interrupt void Timer_A (void)
{
    CCR0 += Bitime;                                             // Add Offset to CCR0
    if (BitCnt == 0) {                                          // If all bits TXed, disable interrupt
        CCTL0 &= ~ CCIE ;
    } else {
        CCTL0 |=  OUTMOD2;                                      // TX Space
        if (TXByte & 0x01)
            CCTL0 &= ~ OUTMOD2;                                 // TX Mark
        TXByte >>= 1;
        BitCnt --;
    }
}