msp430F413 请问喂狗语句

灰小子：

1、WDT_ARST_1000是设置看门狗计时周期的语句，具体的周期时间和选用的时钟频率有关系。是2的15次方的时钟数。

2、喂狗一般是用：WDTCTL =WDT_ARST_1000+WDTCNTCL;

user4385857：

回复 灰小子:

１、使用外部晶振32K，工作频率在1MHZ，

SCFQCTL = SCFQ_1M; // 1MHZ fMCLK=32*fACLK */ FLL_CTL0 |= XCAP14PF; // Configure load caps Set load cap for 32k xtal XIN Cap = XOUT Cap = 14pf */

2、可以调用250mS一次来喂狗吗,？  谢谢！：WDTCTL =WDT_ARST_250+WDTCNTCL;   //250ms

Susan Yang：

回复 user4385857:

有相关例程的，您可以看一下（用WDT的定时模式来定时250ms翻转P5.1）

/* --COPYRIGHT--,BSD_EX* Copyright (c) 2012, Texas Instruments Incorporated* All rights reserved.** Redistribution and use in source and binary forms, with or without* modification, are permitted provided that the following conditions* are met:** *Redistributions of source code must retain the above copyright*notice, this list of conditions and the following disclaimer.** *Redistributions in binary form must reproduce the above copyright*notice, this list of conditions and the following disclaimer in the*documentation and/or other materials provided with the distribution.** *Neither the name of Texas Instruments Incorporated nor the names of*its contributors may be used to endorse or promote products derived*from this software without specific prior written permission.** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR* 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,* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,* 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--*/
//******************************************************************************
//MSP-FET430P410 Demo - WDT, Toggle P5.1, Interval Overflow ISR, 32kHz ACLK
//
//Description: Toggle P5.1 using WDT configured for Interval Timer mode.
//Interrupt toggles LED every 250ms based on 32kHz ACLK WDT clock source.
//ACLK = LFXT1 = 32768Hz, MCLK = SMCLK = default DCO = 32 x ACLK = 1048576Hz
////* An external watch crystal between XIN & XOUT is required for ACLK *////
//MSP430F413
//-----------------
///|\|XIN|-
//| || 32kHz
//--|RSTXOUT|-
//||
//|P5.1|-->LED
//
//M. Buccini
//Texas Instruments Inc.
//Feb 2005
//Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.21A
//*****************************************************************************
#include <msp430.h>int main(void)
{WDTCTL = WDT_ADLY_250;// WDT 250ms, ACLK, interval timerFLL_CTL0 |= XCAP14PF;// Configure load capsIE1 |= WDTIE;// Enable WDT interruptP5DIR |= 0x02;// Set P5.1 to output direction__bis_SR_register(LPM3_bits + GIE);// Enter LPM3 w/interrupt
}// Watchdog Timer interrupt service routine
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=WDT_VECTOR
__interrupt void watchdog_timer(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(WDT_VECTOR))) watchdog_timer (void)
#else
#error Compiler not supported!
#endif
{P5OUT ^= 0x02;// Toggle P5.1 using exclusive-OR
}