main.c

launchpad msp430官方示例

//******************************************************************************
// RO_PINOSC_TA0_WDTp example
// RO method capactiance measurement using PinOsc IO, TimerA0, and WDT+
//
//          Schematic Description: 
// 
//                         MSP430G2452
//                      +---------------+
//                      |
//             C--------|P2.4
//           C----------|P2.1
//               C------|P2.3
//             C--------|P2.2
//                      |
//           C----------|P2.5
//                      |
//           C----------|P2.0
// 
//        The WDT+ interval represents the measurement window.  The number of 
//        counts within the TA0R that have accumulated during the measurement
//        window represents the capacitance of the element. This is lowest 
//        power option with either LPM3 (ACLK WDTp source) or LPM0 (SMCLK WDTp 
//        source).
//
//******************************************************************************
#include "CTS_Layer.h"

unsigned int position;
//unsigned int dCnt[4];

// Main Function
void main(void)
{ 
  WDTCTL = WDTPW + WDTHOLD;             // Stop watchdog timer
  BCSCTL1 = CALBC1_8MHZ;                // Set DCO to 1, 8, 12 or 16MHz
  DCOCTL = CALDCO_8MHZ;
  BCSCTL1 |= DIVA_0;                    // ACLK/(0:1,1:2,2:4,3:8)
  BCSCTL2 |= DIVS_3;                    // SMCLK/(0:1,1:2,2:4,3:8)
  BCSCTL3 |= LFXT1S_2;                  // LFXT1 = VLO

  // establish baseline
  TI_CAPT_Init_Baseline(&wheel);
  TI_CAPT_Update_Baseline(&wheel,5);

  // Main loop starts here
  while (1)
  {
    position = TI_CAPT_Wheel(&wheel);
	//TI_CAPT_Raw(&wheel,dCnt);
    //TI_CAPT_Custom(&wheel,dCnt);
    if(position != ILLEGAL_SLIDER_WHEEL_POSITION)   
    {
        __no_operation();
    }
    __delay_cycles(100); 

  }
} // End Main