msp430xe42x.c

msp430xE427.c温湿光检测程序

#include          "msp430xE42x.h"       // Standard Equations

static unsigned int results[3];         // Needs to be global in this example
                                        // Otherwise, the compiler removes it
                                        // because it is not used for anything.

void main(void)
{
  volatile unsigned int i;

  WDTCTL = WDTPW+WDTHOLD;               // Stop watchdog timer
  FLL_CTL0 |= XCAP14PF;                 // Set load capacitance for xtal.
  for (i = 0; i < 20000; i++);          // Delay - to allow watch crystal to stabilize.
  P1DIR = 0xFF;
  P1OUT = 0;
  P2DIR = 0xFF;
  P2OUT = 0xFF;
  
  SD16CTL = SD16REFON+SD16SSEL0;        // Turn on SD16 Ref,SMCLK
  SD16CCTL0 |= SD16SNGL+SD16GRP+SD16IE; // Enable Grouping with next higher channel,
                                        // Single Conv
  SD16CCTL1 |= SD16SNGL+SD16GRP+SD16IE; // Enable Grouping with next higher channel,
                                        // Single Conv
  SD16CCTL2 |= SD16SNGL+SD16IE;         // Single Conv, Interrupt Enable
  _EINT();                              // Enable interrupts

  for ( i=0; i<0x3600; i++);            // Delay for reference start-up

  while (1)
  {
   results[0]=0;    //光
   results[1]=0;    //湿
   results[2]=0;    //温

   SD16CCTL2 |= SD16SC;                 // Start conversion
   //_BIS_SR(LPM0_bits);                // Enter LPM0
   for ( i=0; i<0x3600; i++);
   for ( i=0; i<0x3600; i++);
   for ( i=0; i<0x3600; i++);
  }
}

enum
{
  NO_INT = 0,
  SDM0 = 4,
  SDM1 = 6,
  SDM2 = 8
};

#pragma vector=SD16_VECTOR
__interrupt void SD16ISR (void)
{
  switch (SD16IV)
  {
    case NO_INT: break;
    case SDM0: results[0] = SD16MEM0; break; // Move results, IFG is cleared
    case SDM1: results[1] = SD16MEM1; break; // Move results, IFG is cleared
    case SDM2: results[2] = SD16MEM2; SD16CTL= 0;/* LPM3; */ break;
                                             // Move results, IFG is cleared
                                             // LPM3 or 4
    default: break;
  }
}