[参考译文] LAUNCHXL-F2800137：F2800137看门狗计时器溢出 MCU 复位

您好、

Unknown 说：

at watchdog timer overflow time->调试暂停。 我认为 MCU 应该被重置。

调试被暂停意味着什么？ 您是否暂停了？

Unknown 说：

当我只使用 USB 电缆为 LaunchPad 上电但不使用调试模式时、MCU 不会执行任何诸如切换引脚

您是否正确设置了引导模式、以便设备通过重置循环并引导至应用程序？ 有关更多详细信息、请参阅"Bootrom"一章

Unknown 说：

是任何在无调试模式下使用 LaunchPad 且 MCU 仅通过为电路板供电即可正常工作的方法。

无论是否有调试器看门狗、看门狗的工作原理都是一样的。 对于以下调试模式看门狗行为、需要牢记一些注意事项：  

谢谢

" 你说什么?"侯龙涛一皱眉,问道。 您是否暂停了？

Deepak：不、我不会暂停处理。 当看门狗计时器溢出以复位 MCU 时、C28xx_CPU1自动从运行状态变为停止状态。

//#############################################################################
//
// FILE:   empty_driverlib_main.c
//
//! \addtogroup driver_example_list
//! <h1>Empty Project Example</h1> 
//!
//! This example is an empty project setup for Driverlib development.
//!
//
//#############################################################################
//
//
// $Copyright:
// Copyright (C) 2024 Texas Instruments Incorporated - http://www.ti.com/
//
// 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.
// $
//#############################################################################

//
// Included Files
//
#include "driverlib.h"
#include "device.h"
#include "board.h"
#include "c2000ware_libraries.h"

//
// Globals
//
uint32_t wakeCount;
uint32_t loopCount;

//
// Function Prototypes
//
__interrupt void wakeupISR(void);
//
// Main
//
void main(void)
{

    //
    // Initialize device clock and peripherals
    //
    Device_init();

    //
    // Disable pin locks and enable internal pull-ups.
    //
    Device_initGPIO();

    //
    // Initialize PIE and clear PIE registers. Disables CPU interrupts.
    //
    Interrupt_initModule();

    //
    // Initialize the PIE vector table with pointers to the shell Interrupt
    // Service Routines (ISR).
    //
    Interrupt_initVectorTable();

    //
    // PinMux and Peripheral Initialization
    //
    Board_init();

    //
    // C2000Ware Library initialization
    //
    C2000Ware_libraries_init();

   //
    // Re-map watchdog wake interrupt signal to call the ISR function in this
    // example
    //
    //Interrupt_register(INT_WAKE, &wakeupISR);

    //
    // Clear the counters
    //
    wakeCount = 0;
    loopCount = 0;

    //
    // Set the watchdog to generate an interrupt signal or a reset signal
    //
    //SysCtl_setWatchdogMode(SYSCTL_WD_MODE_INTERRUPT);
     SysCtl_setWatchdogMode(SYSCTL_WD_MODE_RESET);

    //
    // Enable the watchdog wake interrupt signal
    //
    //Interrupt_enable(INT_WAKE);
    //
    // Enable Global Interrupt (INTM) and real time interrupt (DBGM)
    //
    EINT;
    ERTM;

    //
    // Reset the watchdog counter
    //
    SysCtl_serviceWatchdog();
GPIO_writePin(myGPIO_OUT5, 1);

    //
    // Enable the watchdog
    //
    SysCtl_enableWatchdog();

    while(1)
    {
        loopCount++;
    if(loopCount>500)
      GPIO_writePin(myGPIO_OUT5, 0);  
    //GPIO_togglePin(myGPIO_OUT5);
    if(loopCount<1000)
    {
      DEVICE_DELAY_US(12000);
      SysCtl_serviceWatchdog();
    }
    else if(loopCount>=1000)
      DEVICE_DELAY_US(15000);    
        //
        // Uncomment SysCtl_serviceWatchdog to just loop here.
        // Comment SysCtl_serviceWatchdog to have watchdog timeout and trigger
        // an interrupt signal to execute the wakeupISR
        //
         //SysCtl_serviceWatchdog();        
    }
}

//
// Wakeup ISR - The interrupt service routine called when the watchdog
//              triggers the wake interrupt signal
//
/*
__interrupt void
wakeupISR(void)
{
    wakeCount++;
if(wakeCount>1000)
  SysCtl_setWatchdogMode(SYSCTL_WD_MODE_RESET);
    //
    // Acknowledge this interrupt located in group 1
    //
    Interrupt_clearACKGroup(INTERRUPT_ACK_GROUP1);
}
*/
//
// End of File
//

Prathan Bhatt 说： 您是否正确设置了引导模式、使设备通过重置循环并引导至应用程序？ 有关更多详细信息、请参阅"Bootrom"一章？

Deepak：-我将引导模式用作闪存。就像我在 F2800137 LaunchPad 上 S3的两个跳线(GPIO24、GPIO32)上切换一样。

感谢您的反馈、

Deepak

Unknown 说：

c28xx_CPU1在看门狗计时器溢出以复位 MCU 时自动从运行状态变为停止阶段。

好的、它在重置矢量上吗？

这看起来像因为调试器已连接、您需要将仿真引导模式设置为闪存。

您可以在此处查看此 e2e 帖子： https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1416246/tms320f280049c-280049c/5439795?tisearch=e2e-sitesearch&keymatch=emulation%2520boot%2520mode%2520scripts%2520prarthan%2520bhatt#5439795 

谢谢