MSP430F5310定时器 CCIF置位不清零

你好，

CCIF位一般不需要去管理。

如果你需要定时，请参考MSPWARE里面的Timer例程即可：

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//******************************************************************************
// MSP430G2xx1 Demo - Timer_A, Toggle P1.0-2, Cont. Mode ISR, DCO SMCLK
//
// Description: Use Timer_A CCRx units and overflow to generate four
// independent timing intervals. For demonstration, CCR0 and CCR1 output
// units are optionally selected with port pins P1.1 and P1.2 in toggle
// mode. As such, these pins will toggle when respective CCRx registers match
// the TAR counter. Interrupts are also enabled with all CCRx units,
// software loads offset to next interval only - as long as the interval offset
// is aded to CCRx, toggle rate is generated in hardware. Timer_A overflow ISR
// is used to toggle P1.0 with software. Proper use of the TAIV interrupt
// vector generator is demonstrated.
// ACLK = n/a, MCLK = SMCLK = TACLK = default DCO ~1MHz
// As coded and assuming ~1MHz DCO, toggle rates are:
// P1.1 = CCR0 ~ 1MHz/(2*200) ~2500Hz
// P1.2 = CCR1 ~ 1MHz/(2*1000) ~500Hz
// P1.0 = overflow ~ 1MHz/(2*65536) ~8Hz
//
// MSP430G2xx1
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
// | P1.1/TA0|--> CCR0
// | P1.2/TA1|--> CCR1
// | P1.0|--> Overflow/software
//
// D. Dang
// Texas Instruments Inc.
// October 2010
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************

#include <msp430.h>

int main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
P1SEL |= 0x06; // P1.1 - P1.2 option select
P1DIR |= 0x07; // P1.0 - P1.2 outputs
CCTL0 = OUTMOD_4 + CCIE; // CCR0 toggle, interrupt enabled
CCTL1 = OUTMOD_4 + CCIE; // CCR1 toggle, interrupt enabled
TACTL = TASSEL_2 + MC_2 + TAIE; // SMCLK, Contmode, int enabled

__bis_SR_register(LPM0_bits + GIE); // Enter LPM0 w/ interrupt
}

// Timer A0 interrupt service routine
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=TIMERA0_VECTOR
__interrupt void Timer_A0 (void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(TIMERA0_VECTOR))) Timer_A0 (void)
#else
#error Compiler not supported!
#endif
{
CCR0 += 200; // Add Offset to CCR0
}

// Timer_A2 Interrupt Vector (TAIV) handler
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=TIMERA1_VECTOR
__interrupt void Timer_A1(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(TIMERA1_VECTOR))) Timer_A1 (void)
#else
#error Compiler not supported!
#endif
{
switch( TAIV )
{
case 2: CCR1 += 1000; // Add Offset to CCR1
break;
case 10: P1OUT ^= 0x01; // Timer_A3 overflow
break;
}
}