fet140_dac12_02.c

msp430f14x 系列片内外设的实例代码

//******************************************************************************
//  MSP-FET430P140 Demo - DAC12.1 Output 2V  
//
//  Description; Using DAC12.1 and 2.5V ADC12REF reference with a gain of 1, 
//  ouput 2V on P6.7. Ouput accuracy is specified by that of the ADC12REF.
//  //* MSP430F169 Device Required*//
//
//               MSP430F169
//            -----------------
//        /|\|              XIN|-  
//         | |                 |
//         --|RST          XOUT|-
//           |                 |
//           |        DAC1/P6.7|--> 2V
//           |                 |
//
//  M.Buccini
//  Texas Instruments, Inc
//  October 2003
//  Built with IAR Embedded Workbench Version: 1.26B
//  December 2003
//  Updated for IAR Embedded Workbench Version: 2.21B
//******************************************************************************

#include  <msp430x16x.h>

void main(void)
{ 
  WDTCTL = WDTPW + WDTHOLD;                       // Stop watchdog
  ADC12CTL0 = REF2_5V + REFON;                    // Internal 2.5V ref on 
  DAC12_1CTL = DAC12IR + DAC12AMP_5 + DAC12ENC;   // Internal ref gain 1
  DAC12_1DAT = 0x0CCC;                            // 2V

  _BIS_SR(LPM4_bits);                             // Enter LPM4 
}