test44x_ca03.c

来自「430例程大全 端口操作 时钟模块FLL+操作 flash读写操作 看门」· C语言 代码 · 共 27 行

#include  "msp430x44x.h"

void main (void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
  P5DIR |= 0x02;                            // P5.1 output
  CACTL2 = P2CA0;                           // P1.6 = CA0
  while (1)                                 // Mainloop
  {
    Batt_Check();
  }
}

void Batt_Check(void) {
  CACTL1 = CAREF_1 + CAON;                  // 0.25*Vcc on P2.3, Comp. on
  i = 16384;                                // delay
  while(i>0) {
    i--;
  }
  CACTL1 = CARSEL + CAREF_2 + CAREF_1 + CAON; // 0.55V on -, Comp. on
  if ((CACTL2 & CAOUT) > 0)                 
    P5OUT ^= 0x02;                          // P1.0 toggle
  else P5OUT |= 0x02;                       // P1.0 set
  CACTL1 = 0x00;                            // Disable Comp_A, save power
}