comp_b_ex5_TAx.c File Reference

#include "driverlib.h"

Go to the source code of this file.

Macros
#define	TIMER_A_PERIOD   0xFFFF
#define	UCS_MCLK_DESIRED_FREQUENCY_IN_KHZ   12000
#define	UCS_MCLK_FLLREF_RATIO   374

Functions
void	main (void)
void	TIMER_A (void)

Variables
Timer_A_initUpModeParam	initUpModeParam = {0}

Macro Definition Documentation

TIMER_A_PERIOD

#define TIMER_A_PERIOD   0xFFFF

COMPB - TA0.1, TA1.1, Varying duty cycle of input voltage

Use CompB to determine if input, Vcompare has a duty cycle greater than 50%. When Vcompare exceeds Vcc*3/4 then TimerA0 captures the time (TA0CCR1). When Vcompare is less than Vcc*1/4 then TimerA1 captures the time (TA1CCR1) and resets the timers for TIMERA0 and TIMERA1. If TA0CCR1 is greater than TA1CCR1/2, then turn on the LED. If TA0CCR1 is less than TA1CCR1/2, then turn off the LED. Clocks: ACLK = REFO; MCLK = SMCLK = 12MHz

       MSP430x552x
   ------------------

/|| | | | | –|RST P6.0/CB0|<- Vcompare (200Hz<f<1Mhz) (vary dutycycle) | P1.0|-> LED ('ON' if dutycycle > 50%; | | 'OFF' if dutycycle < 50%)

This example uses the following peripherals and I/O signals. You must review these and change as needed for your own board:

• COMPB peripheral
• GPIO Port peripheral
• CB0

This example uses the following interrupt handlers. To use this example in your own application you must add these interrupt handlers to your vector table.

• TIMER1_A1_VECTOR

Definition at line 67 of file comp_b_ex5_TAx.c.

UCS_MCLK_DESIRED_FREQUENCY_IN_KHZ

#define UCS_MCLK_DESIRED_FREQUENCY_IN_KHZ   12000

Definition at line 68 of file comp_b_ex5_TAx.c.

UCS_MCLK_FLLREF_RATIO

#define UCS_MCLK_FLLREF_RATIO   374

Definition at line 69 of file comp_b_ex5_TAx.c.

Function Documentation

main()

void main

(

void

)

Definition at line 73 of file comp_b_ex5_TAx.c.

References __delay_cycles(), __no_operation(), initUpModeParam, TIMER_A_PERIOD, UCS_MCLK_DESIRED_FREQUENCY_IN_KHZ, and UCS_MCLK_FLLREF_RATIO.

TIMER_A()

void TIMER_A

(

void

)

Definition at line 205 of file comp_b_ex5_TAx.c.

References __no_operation(), GPIO_setOutputHighOnPin(), GPIO_setOutputLowOnPin(), initUpModeParam, temp, and TIMER_A_PERIOD.

Variable Documentation

initUpModeParam

Timer_A_initUpModeParam initUpModeParam = {0}

Definition at line 71 of file comp_b_ex5_TAx.c.

Referenced by main(), and TIMER_A().