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#include < msp430x12x.h >
__interrupt void Timer_A1(void);
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
DCOCTL |= DCO2; // max Freq
BCSCTL1 |= RSEL0 + RSEL1; // max Freq
_BIS_SR(OSCOFF); // OSCOFF
P1DIR = 0xFF-4; // P1.x Outputs Function except P1.2
CAPD = 0xFF; // P2.x Buffers off
P1SEL = (1 << 2); // P1.2 - peripheral TA1 CCI1A
TACTL = TASSEL_2+MC_2; // TimerA: SMCLK, Continous
CCTL1 = CM0+CM1+SCS+CAP+CCIE; // TA0 Both Edges+Synhr+CAP+IE // +CCI1A(default)
_EINT(); // Enable interrupts;
P1OUT ^= 1; // Toggle P1.0
LPM0; // Enter Low Power Mode 0
}
// Timer_A3, A1,2 interrupt service routine
#pragma vector=TIMERA1_VECTOR
__interrupt void Timer_A1(void)
{
_BIS_SR(OSCOFF); // OSCOFF
P1OUT ^= 1; // Toggle P1.0
}
/*
MSP430F21x1/11x1 (F123)
136.6 kHz !!! ---------------------------
/|\|RST XIN|-
| | ((32kHz))
|P2.3 19 CA0+ XOUT|-
| |-
|P2.4 20 CA1- |
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+-------|P1.0 21 |
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47k |P1.1 22 CCI0A |
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+-------|P1.2 23 CCI1A |
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=== |P1.3 24 CCI2A |
|47n | |
+-------|VSS___4____________________|
0.9 kHz = 1 / 1.1 ms
*/
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