MSP430 ADC10 bei Taster-Interrupt

#include <msp430.h>

#include "stdint.h"

#define BUTTON_T   BIT6

#define BUTTON_Z   BIT7

#define LED_GREEN  BIT5

#define LED_YELLOW  BIT6

#define LED_RED    BIT7

volatile uint16_t value;

void configureADC(void){

  ADC10CTL0 = ADC10SHT_2 + ADC10ON + ADC10IE; 

  ADC10CTL1 = INCH_0;             // Channel 0

  ADC10AE0 |= BIT0;

}

void sampleADC(void){

  //start sampling

  ADC10CTL0 |= ENC + ADC10SC;

  __bis_SR_register(CPUOFF + GIE);

  value = ADC10MEM;

  if(value < 341){

    P1OUT ^= LED_GREEN;

  }

  else if(value < 682){

    P1OUT ^= LED_YELLOW;

  }

  else{

    P1OUT ^= LED_RED;

  }

}

void init(void){

  WDTCTL = WDTPW + WDTHOLD;            // Watchdog Timer ausschalten

  P1DIR |= (LED_GREEN + LED_YELLOW + LED_RED);  // Set 1.5, 1.6, 1.7 to output direction

  P2SEL &= ~(BUTTON_T + BUTTON_Z);        // 2.6 and 2.7 as GPIO

  P1OUT |= (LED_GREEN + LED_YELLOW + LED_RED);  // turn off all LEDs

  __enable_interrupt();

}

void buttonTinit(void){

  P2REN |= (BUTTON_T + BUTTON_Z);  // Buttons

  P2OUT |= (BUTTON_T + BUTTON_Z);  // with PullUP

  P2IE |= (BUTTON_T + BUTTON_Z);  // Button_T interrupt enabled

  P2IFG &= ~(BUTTON_T + BUTTON_Z);// Interrupt-Flag clear

}

int main(void) {

  init();

  configureADC();

  buttonTinit();

  __low_power_mode_1();

  for(;;) {

  }

  //für Compiler

  //return 0;

}

//Button ISR

#pragma vector=PORT2_VECTOR

__interrupt void Port_2 (void){

  __delay_cycles(20);

  sampleADC();

  P2IFG &= ~(BUTTON_T + BUTTON_Z);

}

//ADC10 ISR

#pragma vector=ADC10_VECTOR

__interrupt void ADC10_ISR (void){

  __bic_SR_register_on_exit(CPUOFF);

}