上电单片机的端口不稳定，闪动7下，非常有规律，求大神指导啊用P1.2驱动一个贴片LED，观察PWM波形变化
用的如下程序测试的：
- #include <msp430x14x.h>
-
- void main(void)
- {
- WDTCTL = WDTPW +WDTHOLD; // Stop WDT
- TACTL = TASSEL1 + TACLR; // SMCLK, Clear Tar
- CCR0 = 512-1; // PWM Period = 488uS
- CCTL1 = OUTMOD_7; // CCR1 reset/set
- CCR1 = 256; // CCR1 PWM duty cycle
- CCTL2 = OUTMOD_7; // CCR2 reset/set
- CCR2 = 128; // CCR2 PWM duty cycle
- P1DIR |= 0x04; // P1.2 output
- P1SEL |= 0x04; // P1.2 TA1 option
-
- P2DIR |= 0x01; // P2.0 output
- P2SEL |= 0x01; // P2.0 TA2 otion
- TACTL |= MC0; // Start Timer_A in up mode
- for (;;)
- {
- _BIS_SR(CPUOFF); // Enter LPM0
- _NOP(); // Required only for C-spy
- }
- }
昨天测试蜂鸣器和流水灯也出现过闪动现象，求大神指导！谢谢
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