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/* DriverLib Includes */

#include

#include

/* Timer_A Continuous Mode Configuration Parameter */

const Timer_A_ContinuousModeConfig continuousModeConfig =

{

TIMER_A_CLOCKSOURCE_SMCLK, // SMCLK Clock Source

TIMER_A_CLOCKSOURCE_DIVIDER_1, // SMCLK/1 = 3MHz

TIMER_A_TAIE_INTERRUPT_DISABLE, // Disable Timer ISR

TIMER_A_SKIP_CLEAR // Skup Clear Counter

};

/* Timer_A Capture Mode Configuration Parameter */

const Timer_A_CaptureModeConfig captureModeConfig =

{

TIMER_A_CAPTURECOMPARE_REGISTER_1, // CC Register 2

TIMER_A_CAPTUREMODE_RISING_EDGE, // Rising Edge and falling

TIMER_A_CAPTURE_INPUTSELECT_CCIxA, // CCIxA Input Select

TIMER_A_CAPTURE_SYNCHRONOUS, // Synchronized Capture

TIMER_A_CAPTURECOMPARE_INTERRUPT_ENABLE, // Enable interrupt

TIMER_A_OUTPUTMODE_OUTBITVALUE // Output bit value

};

static void Delay(uint32_t loop)

{

volatile uint32_t i;

for (i = 0 ; i < loop ; i++);

}

int meas1 = 0;

int meas2 = 0;

int main(void)

{

/* Stop watchdog timer */

MAP_WDT_A_holdTimer();

CS_setDCOCenteredFrequency(CS_DCO_FREQUENCY_24); // 24000000 Hz

CS_initClockSignal(CS_MCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_1); // 24000000 Hz

CS_initClockSignal(CS_SMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_8); // 3000000 Hz

/* Configuring P2.4 as peripheral input for capture */

GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P2, GPIO_PIN4,

GPIO_PRIMARY_MODULE_FUNCTION);

GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN5);

/* Configuring Capture Mode */

Timer_A_initCapture(TIMER_A0_BASE, &captureModeConfig);

/* Configuring Continuous Mode */

Timer_A_configureContinuousMode(TIMER_A0_BASE, &continuousModeConfig);

/* Enabling interrupts */

Interrupt_enableInterrupt(INT_TA0_N);

Interrupt_enableMaster();

/* Starting the Timer32 */

Timer32_initModule(TIMER32_0_BASE, TIMER32_PRESCALER_1, TIMER32_32BIT, TIMER32_PERIODIC_MODE);

Timer32_disableInterrupt(TIMER32_0_BASE);

Timer32_setCount(TIMER32_0_BASE, 1);

Timer32_startTimer(TIMER32_0_BASE, true);

/* Starting the Timer_A0 in continuous mode */

Timer_A_startCounter(TIMER_A0_BASE, TIMER_A_CONTINUOUS_MODE);

while(1)

{

GPIO_setOutputHighOnPin(GPIO_PORT_P1, GPIO_PIN5);

Timer32_setCount(TIMER32_0_BASE, 24 * 10);

while (Timer32_getValue(TIMER32_0_BASE) > 0); // Wait 10us

GPIO_setOutputLowOnPin(GPIO_PORT_P1, GPIO_PIN5); //software delays

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

Delay(40000);

}

}

void TA0_N_IRQHandler(void)

{

int rising = 0;

Timer_A_clearCaptureCompareInterrupt(TIMER_A0_BASE,

TIMER_A_CAPTURECOMPARE_REGISTER_1);

if(P2IN&0x10) rising=1; else rising=0;

if(rising) // Start

{

meas1 = Timer_A_getCaptureCompareCount(TIMER_A0_BASE, TIMER_A_CAPTURECOMPARE_REGISTER_1);

}

else

{

meas2 = Timer_A_getCaptureCompareCount(TIMER_A0_BASE, TIMER_A_CAPTURECOMPARE_REGISTER_1);

}

}