Hi~ tinyos
I'm Sun Mi from Korea,,,
I am learning Timer-A ...
I'm first to know MSP 430 class. My MSP version is MSP430FG4618
This is timer A codes...
#include <msp430xG46x.h>
void Port_Init(void);
void TimerA_Init(void);
volatile unsigned int count = 16384;
void main(void)
{
// Watchdog Timer Stop
WDTCTL = WDTPW +WDTHOLD;
Port_Init();
TimerA_Init();
// Global Interrupt Enable
__enable_interrupt();
// loop
while(1);
}
void Port_Init(void)
{
// Port2 1,2 pin Output
P2DIR |= 0x06;
P2OUT = 0x00;
// Port3 5 pin Output => buzzer
// P3SEL |= 0x0f0;
P3DIR |= 0x20;
P3OUT = 0x00;
// Port5 1 pin Output
P5DIR |= 0x02;
P5OUT = 0x00;
}
void TimerA_Init(void)
{
TACCTL0 = CCIE; // TACCR0 compare interrupt enable
TACCR0 = count; // TACCR0 compare value set
TACCTL1 = CCIE; // TACCR1 compare interrupt enable
TACCR1 = count*2; // TACCR1 compare value set
TACCTL2 = CCIE; // TACCR2 compare interrupt enable
TACCR2 = count*3; // TACCR2 compare value set
// TimerA Clock Source : ACLK
// Mode : Continuous mode
// TimerA overflow interrupt Enable
TACTL = TASSEL_1 | MC_2 | TAIE;
}
*// TimerA TACCR0 Compare interrupt routine --> ** I don;t
understand this part.. What does mean?? *
*
I tried to know by finding information on user's guide
#pragma vector=TIMERA0_VECTOR Anyway, I don't well
in interrupt notion.. plz. explain details...*
*__interrupt void Timer_A0 (void)
{
if((P2OUT & 0x04) == 0x04) P2OUT &= 0xfb;
else P2OUT |= 0x04;
}*
*// TimerA TACCR1,2 Compare interrupt routine
// TimerA overflow interrupt routine
#pragma vector=TIMERA1_VECTOR
__interrupt void Timer_A1 (void)
{
unsigned char cnt = 0;
switch( TAIV )
{
// TimerA TACCR1
case 2:
if((P2OUT & 0x02) == 0x02) P2OUT &= 0xfd;
else P2OUT |= 0x02;
break;
// TimerA TACCR2
case 4:
P5OUT ^= 0x02;
break;
// TimerA overflow interrupt
case 10:
for(cnt = 0; cnt < 100; cnt++) // cnt value is sound length
{
if((P3OUT & 0x20) == 0x20)
{
P3OUT &= 0xdf;
for(count = 0; count < 60; count++); // count value is
frequency
}
else P3OUT |= 0x20;
}
P3OUT = 0x00;
break;
} // end switch
} // end isr*
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