main.c

launchpad msp430官方示例

//******************************************************************************
// fRO_PINOSC_TA0_SW example
//   fRO method capactiance measurement using the PinOsc and TimerA0
//
//                         MSP430G2452
//                      +---------------+
//                      |
//             C--------|P1.0
//             C--------|P1.1
//             C--------|P1.2
//             C--------|P1.3
//             C--------|P1.4
//             C--------|P1.5
//                      |
//           C----------|P2.0
//           C----------|P2.1
//           C----------|P2.2
//           C----------|P2.3
//           C----------|P2.4
//           C----------|P2.5
//                      |
//           C----------|P2.6
//           C----------|P2.7
//          
//           Charge and Discharge Cycle
//                            + 
//                        +    +
//                    +          +
//                 +                +
//               +                     +
//           Start Timer                  After n cycles Stop Timer
//
//        The TAR reister value is the number of SW loops (function of MCLK) 
//        within n charge and discharge cycles.  This value is directly 
//        proportional to the capacitance of the element measured. 'n' is 
//        defined by the variable accumulation_cycles.
//        This method does not require the use of the WDTp peripheral.
//        Higher resolutions can be achieved with higher clock speeds and 
//        larger accumulation cycles.  This method provides faster scan rates
//        at the expense of higher power consumption during the scans (higher 
//        clock frequencies).
//
//******************************************************************************
#include "CTS_Layer.h"

struct Element * keypressed;
uint8_t sliderPosition;
uint8_t wheelPosition;

// Main Function
void main(void)
{ 
  WDTCTL = WDTPW + WDTHOLD;             // Stop watchdog timer
  
  TI_CAPT_Init_Baseline(&wheel);
  TI_CAPT_Update_Baseline(&wheel,5);
  TI_CAPT_Init_Baseline(&slider);
  TI_CAPT_Update_Baseline(&slider,5);
  TI_CAPT_Init_Baseline(&buttons);
  TI_CAPT_Update_Baseline(&buttons,5);

  // Main loop starts here
  while (1)
  {
    keypressed = (struct Element *)TI_CAPT_Buttons(&buttons);
	if(keypressed)
	{
	    if(keypressed == (struct Element*)&elementC)
		{
		    __no_operation();
		}
	    if(keypressed == (struct Element*)&elementD)
		{
		    __no_operation();
		}
	}
	sliderPosition = TI_CAPT_Slider(&slider);
	if(sliderPosition != (uint8_t)ILLEGAL_SLIDER_WHEEL_POSITION)
	{
	    __no_operation();
	}
	wheelPosition = TI_CAPT_Wheel(&wheel);
	if(wheelPosition != (uint8_t)ILLEGAL_SLIDER_WHEEL_POSITION)
	{
	    __no_operation();
	}
	
  }
} // End Main