fet440_adc12_07.c

是MSP430X44X的各部分的子程序模块

//******************************************************************************
//  MSP-FET430P440 Demo - ADC12, Single Conversion on Single Channel
// 
//  This example shows how to perform a single ADC12 conversion on a single 
//  channel. It uses AVcc for the reference and performs a single conversion on 
//  channel A0. The conversion results are stored in ADC12MEM0. Test by applying 
//  a voltage to channel A0, then setting and running to a break point at the 
//  "_NOP()" instruction. To view the conversion results, open an SFR window
//  in C-Spy and view the contents of ADC12MEM0.
//
//               MSP430F449
//             ---------------
//            |               |
//            |      A0 (P6.0)|<---- Vin
//            |               |
//
//
//  M.Mitchell
//  Texas Instruments, Inc
//  February, 2002
//  Built with IAR Embedded Workbench Version: 1.25A
//******************************************************************************

#include          "msp430x44x.h"        // Standard Equations

void main(void)
{ 
  WDTCTL = WDTPW+WDTHOLD;               // Stop watchdog timer
  P6SEL |= 0x01;                        // Enable A/D channel A0
  ADC12CTL0 = ADC12ON+SHT0_2;           // Turn on ADC12, set sampling time
  ADC12CTL1 = SHP;                      // Use sampling timer
  ADC12CTL0 |= ENC;                     // Enable conversions
   
  while (1)
  { 
    ADC12CTL0 |= ADC12SC;               // Start conversion
    while ((ADC12IFG & BIT0)==0);
    _NOP();                             // SET BREAKPOINT HERE
  }                           
}