hal_adc.c

来自「RF tranceiver MSP430F1612+CC2420」· C语言 代码 · 共 52 行

//******************************************************************************
//  MSP-FET430P120 Demo - ADC10, Sample A0, AVcc Ref, Set P1.0 if > 0.5*AVcc
//
//  Description: A single sample is made on A0 with reference to AVcc.
//  Software sets ADC10SC to start sample and conversion - ADC10SC
//  automatically cleared at EOC. ADC10 internal oscillator times sample (16x)
//  and conversion. In Mainloop MSP430 waits in LPM0 to save power until ADC10
//  conversion complete, ADC10_ISR will force exit from LPM0 in Mainloop on
//  reti. If A0 > 0.5*AVcc, P1.0 set, else reset.
//  //* MSP430F1232 or MSP430F1132 Device Required *//
//
//                MSP430F1232
//             -----------------
//         /|\|              XIN|-
//          | |                 |
//          --|RST          XOUT|-
//            |                 |
//        >---|A7               |-
//
//  M. Buccini
//  Texas Instruments Inc.
//  Feb 2005
//  Built with IAR Embedded Workbench Version: 3.21A
//******************************************************************************

#include "..\..\..\include.h"

void halADCInit(void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
  ADC10CTL0 = ADC10SHT_2 + ADC10ON; // ADC10ON, interrupt enabled +ADC10IE
  ADC10AE |= BIT7;                          // P2.0 ADC option select
//  P1DIR |= 0x01;                            // Set P1.0 to output direction
}
//  for (;;)
//  {
//    ADC10CTL0 |= ENC + ADC10SC;             // Sampling and conversion start
//    _BIS_SR(CPUOFF + GIE);                  // LPM0, ADC10_ISR will force exit
//    if (ADC10MEM < 0x1FF)
//    P1OUT &= ~0x01;                         // Clear P1.0 LED off
//    else
//    P1OUT |= 0x01;                          // Set P1.0 LED on
//  }
//}

// ADC10 interrupt service routine
//#pragma vector=ADC10_VECTOR
//__interrupt void ADC10_ISR (void)
//{
//    _BIC_SR_IRQ(CPUOFF);                    // Clear CPUOFF bit from 0(SR)
//}