#include  <msp430x42x0.h>

// Deklaration Variablen
typedef unsigned char byte;
float calculate;
float result[4] = {0};
byte chan = 0;

// Deklaration Funktionen
void voltage (byte chan);


void main(void)
{
  volatile unsigned int i;                  // Use volatile to prevent removal
                                            // by compiler optimization
  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
  FLL_CTL0 |= XCAP14PF;                     // Configure load caps
  for (i = 0; i < 5000; i++);               // Delay for 32 kHz crystal to
                                            // stabilize
  SD16CTL = SD16REFON;                      // 1.2V ref, MCLK
  TACTL = TASSEL_2 + MC_2;                  // SMCLK, continuous mode
  for (i = 0; i < 1; i++);                  // Delay for 1.2V ref startup 0x3600 
//****************************************************************************

  for (;;)
  {
    if (chan <= 3)                          // Einstellung für 2-Kanäle
                                            // (Kanal A0-A3)
    {
      voltage ((chan));
      for ( i=0; i<30500; i++);             // wait for ADC (ohne gehts irgenwie
                                            // gar nicht)
    }
    else
      chan=0;
  }
}

//****************************************************************************


void voltage(byte chan)
{
  SD16INCTL0 |= (chan & 0x03) + SD16INTDLY_0;     // Interrupt on 4th sample 
  SD16CCTL0 |= SD16IE + SD16SNGL;        // Single conv, enable interrupt, 1024 OSR
  SD16CCTL0 |= SD16SC;                   // SET BREAKPOINT HERE
  _EINT();                               // Enable general interrupts
}
//****************************************************************************


#pragma vector=SD16_VECTOR
__interrupt void SD16ISR(void)
{
  switch (SD16IV)
  {
  case 2:                                   // SD16MEM Overflow
    break;
  case 4:                                   // SD16MEM0 IFG
    {
      calculate = SD16MEM0;                 // Save CH0 results (clears IFG)
      calculate -= 0x8000;                  //-------------------
      calculate /= 32768;                   // errechnen der Spannung(muß nicht drin sein!!)
      calculate *= .6;                      //-------------------

      result[chan++] = calculate;
      
      break;
    }    
  }  
}