MSP430F427判断单片机是正常上电重启还是看门狗复位重启？

我这边没有F4的板子，所以使用MSP430G2553开发板测试了一下

可以发现WDTIFG置位的

代码如下

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//******************************************************************************
//  MSP430G2xx3 Demo - WDT+ periodic reset
//
//  Description; Various reset intervals are configured in watchdog mode.
//  To illustrate the speed of the reset time the LED flashes in accordance
//  of the selected interval.
//
//  ACLK = 32khz, MCLK = SMCLK = default DCO
//
//        MSP430G2xx3
//             -----------------
//         /|\|              XIN|-
//          | |                 |
//          --|RST          XOUT|-
//            |                 |
//            |             P1.0|-->LED
//
//  D. Dang
//  Texas Instruments Inc.
//  February 2011
//  Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************
#include <msp430.h>

int main(void)
{
                                            // WDT is clocked by fSMCLK (1MHz)
  WDTCTL = WDT_MRST_32;                       // ~32ms interval (default)
  //WDTCTL = WDT_MRST_8;                      // ~8ms
  //WDTCTL = WDT_MRST_0_5;                    // ~0.5ms
  //WDTCTL = WDT_MRST_0_064;                  // ~0.064ms
                                            // WDT is clocked by fACLK (32KHz)
  //WDTCTL = WDT_ARST_1000;                   // 1000ms
  //WDTCTL = WDT_ARST_250;                    // 250ms
  //WDTCTL = WDT_ARST_16;                     // 16ms
  //WDTCTL = WDT_ARST_1_9;                    // 1.9ms
  P1DIR |= 0x01;
  P1OUT ^=0x01;

  __bis_SR_register(LPM0_bits + GIE);       // Enter LPM3 w/interrupt
}