MSP-EXP430F5529LP开发板004-PWM库函数

测试了TIMER_A的PWM几种模式

pwmMultipleUp

2.06kHz，75%占空比

#include "wdt_a.h"

#include "gpio.h"

#include "timer_a.h"

#define TIMER_PERIOD 511

#define DUTY_CYCLE1  384

#define DUTY_CYCLE2  128

int main( void )

{

  volatile unsigned int i;

  WDT_A_hold(WDT_A_BASE);

  //P2.0 and P2.1 output

  //P2.0 and P2.1 options select

  GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P2,GPIO_PIN0 + GPIO_PIN1);

  //Start timer

  Timer_A_initUpModeParam initUpParam = {0};

  initUpParam.clockSource = TIMER_A_CLOCKSOURCE_SMCLK;

  initUpParam.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_1;

  initUpParam.timerPeriod = TIMER_PERIOD;

  initUpParam.timerInterruptEnable_TAIE = TIMER_A_TAIE_INTERRUPT_DISABLE;

  initUpParam.captureCompareInterruptEnable_CCR0_CCIE = TIMER_A_CCIE_CCR0_INTERRUPT_DISABLE;

  initUpParam.timerClear = TIMER_A_DO_CLEAR;

  initUpParam.startTimer = false;

  Timer_A_initUpMode(TIMER_A1_BASE, &initUpParam);

  Timer_A_startCounter(TIMER_A1_BASE,TIMER_A_UP_MODE);

  //Initialize compare mode to generate PWM1

  Timer_A_initCompareModeParam initComp1Param = {0};

  initComp1Param.compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_1;

  initComp1Param.compareInterruptEnable = TIMER_A_CAPTURECOMPARE_INTERRUPT_DISABLE;

  initComp1Param.compareOutputMode = TIMER_A_OUTPUTMODE_RESET_SET;

  initComp1Param.compareValue = DUTY_CYCLE1;

  Timer_A_initCompareMode(TIMER_A1_BASE, &initComp1Param);

  //Initialize compare mode to generate PWM2

  Timer_A_initCompareModeParam initComp2Param = {0};

  initComp2Param.compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_2;

  initComp2Param.compareInterruptEnable = TIMER_A_CAPTURECOMPARE_INTERRUPT_DISABLE;

  initComp2Param.compareOutputMode = TIMER_A_OUTPUTMODE_RESET_SET;

  initComp2Param.compareValue = DUTY_CYCLE2;

  Timer_A_initCompareMode(TIMER_A1_BASE, &initComp2Param);

  //Enter LPM0

  __bis_SR_register(LPM0_bits);

  //For debugger

  __no_operation();

  while(1)                                  // continuous loop

  {

  } 

}

pwmSingle

2.06kHz，68%占空比

#include "wdt_a.h"

#include "gpio.h"

#include "timer_a.h"

#define TIMER_PERIOD 511

#define DUTY_CYCLE  350

int main( void )

{

  volatile unsigned int i;

  WDT_A_hold(WDT_A_BASE);

  //P2.0 as PWM output

  GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P2,GPIO_PIN0);

  //Generate PWM - Timer runs in Up mode

  Timer_A_outputPWMParam param = {0};

  param.clockSource = TIMER_A_CLOCKSOURCE_SMCLK;

  param.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_1;

  param.timerPeriod = TIMER_PERIOD;

  param.compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_1;

  param.compareOutputMode = TIMER_A_OUTPUTMODE_RESET_SET;

  param.dutyCycle = DUTY_CYCLE;

  Timer_A_outputPWM(TIMER_A1_BASE, ¶m);

  //Enter LPM0

  __bis_SR_register(LPM0_bits);

  //For debugger

  __no_operation();

  while(1)                                  // continuous loop

  {

  } 

}