使用MSP430FR2033，Debug正常，但单独上电异常

我在调试MSP430FR2033的按键时发现一个很奇怪的问题，我在Debug时可以正常进入按键中断（下降沿触发），但烧录好了之后单独上电就是无法进入中断。我debug没有设置任何断点，直接点击的运行。

int main(void)
{WDTCTL = WDTPW | WDTHOLD;// Stop watchdog timerinitGpio();cs_init();//uart_init();limit_int_en();bat_info_init();angle_info_init();vent_self_test();rtc_wake_isr();while (1) {angle_test();}

}

void limit_int_en(void)
{P2IFG &= ~(BIT4 | BIT5);//clear P2IFGsP2IE |= BIT4 | BIT5;
}

void vent_self_test(void)
{__bis_SR_register(GIE);// General interrupt enabledelay_hw_s(10);vent_info_init();angle_en();timer_start();motor_init(motor_stop, 10000, 75);pwm_init();if (!((P2IN & BIT4) == 0)) {vent_open();while (vent.limit_open_flag == ERROR) {limit_error();}}vent_close();while (vent.limit_close_flag == ERROR) {limit_error();}if (vent.limit_open_flag == ERROR) {vent_open();while (vent.limit_open_flag == ERROR) {limit_error();}}vent.init_flag = OK;timer_end();Angle_correction();angle_off();
}

// Port 2 interrupt service routine
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=PORT2_VECTOR
__interrupt void Port_2(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(PORT1_VECTOR))) Port_2 (void)
#else
#error Compiler not supported!
#endif
{switch (P2IFG) {case BIT0:P2IFG &= ~BIT0;break;case BIT1:P2IFG &= ~BIT1;break;case BIT2:P2IFG &= ~BIT2;break;case BIT3:P2IFG &= ~BIT3;break;case BIT4:/* P2.4 is LIMIT1 (Vent open), Falling edge*/P2IFG &= ~BIT4;//__delay_cycles(10000);// Delay for n*(1/MCLK(8000000)=0.1s//if (!(P2IN & BIT4)) {if (motor.motor_flag == open_flag) {motor_stop_operate();motor.stop_flag = open_limit_stop;if (vent.limit_open_flag == ERROR) {angle.value_open = read_angle_value();vent.limit_open_flag = OK;}led_off();green_on();}//}break;case BIT5:/* P2.5 is LIMIT2(Vent close), Falling edge*/P2IFG &= ~BIT5;//__delay_cycles(10000);// Delay for n*(1/MCLK(8000000)=0.1s//if (!(P2IN & BIT5)) {if (motor.motor_flag == close_flag) {motor_stop_operate();motor.stop_flag = close_limit_stop;if (vent.limit_close_flag == ERROR) {angle.value_close = read_angle_value();vent.limit_close_flag = OK;}led_off();blue_on();}//}break;case BIT6:P2IFG &= ~BIT6;break;case BIT7:P2IFG &= ~BIT7;break;default: break;}
}

后面我单独对按键进行了测试，发现问题点是在开始时单独对中断标志位清0，还是对P2整个中断标志清0上，如果单独对你需要用的中断清0的话，debug正常，但单独上电异常，难道是单独上电时其他中断标志位初始值不为0？

下面是我的测试代码

/* --COPYRIGHT--,BSD_EX
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 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *******************************************************************************
 *
 *MSP430 CODE EXAMPLE DISCLAIMER
 *
 * MSP430 code examples are self-contained low-level programs that typically
 * demonstrate a single peripheral function or device feature in a highly
 * concise manner. For this the code may rely on the device's power-on default
 * register values and settings such as the clock configuration and care must
 * be taken when combining code from several examples to avoid potential side
 * effects. Also see www.ti.com/grace for a GUI- and www.ti.com/msp430ware
 * for an API functional library-approach to peripheral configuration.
 *
 * --/COPYRIGHT--*/
//******************************************************************************
//  MSP430FR413x Demo - Software Port Interrupt Service on P1.3 from LPM3
//
//  Description: A Hi/Lo transition on P1.3 will trigger P1ISR the first time.
//  On hitting the P1ISR, device exits LPM3 mode and executes section of code in
//  main() which includes toggling an LED.
//
//  ACLK = default REFO ~32768Hz, MCLK = SMCLK = default DCODIV ~1MHz.
//
//
//MSP430FR4133
//---------------
///|\||
//| ||
//--|RST|
///|\||
//--o--|P1.3P1.0|-->LED
//\|/||
//||
//
//Cen Fang
//Wei Zhao
//Texas Instruments Inc.
//Oct 2013
//Built with IAR Embedded Workbench v5.60 & Code Composer Studio v5.5
//******************************************************************************

#include <msp430.h>

#include "gpio.h"

#include "led.h"


int main(void)
{WDTCTL = WDTPW | WDTHOLD;// Stop watchdog timerinitGpio();
#if (1)P2IFG = 0x0;//clear P2IFGs,it is good.//P2IFG &= ~(BIT4 | BIT5);//clear P2.4,P2.5IFGs ,it is bad.P2IE |= BIT4 | BIT5;
#endif

#if (0)P2IFG = 0x0;//clear P2IFGsP2IE = 0x30;
#endifwhile(1){__bis_SR_register(LPM3_bits | GIE); // Enter LPM3 w/interrupt__no_operation();// For debugger}
}

// Port 2 interrupt service routine
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=PORT2_VECTOR
__interrupt void Port_2(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(PORT1_VECTOR))) Port_2 (void)
#else
#error Compiler not supported!
#endif
{switch (P2IFG) {case BIT0:P2IFG &= ~BIT0;break;case BIT1:P2IFG &= ~BIT1;break;case BIT2:P2IFG &= ~BIT2;break;case BIT3:P2IFG &= ~BIT3;break;case BIT4:/* P2.4 is LIMIT1 (Vent open), Falling edge*/P2IFG &= ~BIT4;led_off();green_on();break;case BIT5:/* P2.5 is LIMIT2(Vent close), Falling edge*/P2IFG &= ~BIT5;led_off();blue_on();break;case BIT6:P2IFG &= ~BIT6;break;case BIT7:P2IFG &= ~BIT7;break;default: break;}
}

灰小子：

能否上传下你的代码和电路图

yanqing zhou：

回复 灰小子:

涉及到的代码已经发上去了，电路图就是两个按键加上拉电阻到P2.4,P2.5

Ling Zhu2：

板子供电正常么？

Susan Yang：

回复 yanqing zhou:

首先请您确定程序确实烧录成功，其次请您确认下您的板子供电情况是否正常

yanqing zhou：

回复 Susan Yang:

程序确定烧进去了，供电也是正常的

yanqing zhou：

回复 Ling Zhu2:

正常