MSP-EXP430F5529LP開發板004-PWM庫函式
阿新 • • 發佈:2018-12-10
測試了TIMER_A的PWM幾種模式
pwmMultipleUp
2.06kHz,75%佔空比
#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 { } }
#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 { } }
pwmSingle
2.06kHz,68%佔空比