[参考译文] TMS320F28075：丢失时钟检测无效

您好、专家、

   根据您的建议、我已经测试了两个项目、但问题仍然存在、不会触发 CLKFAIL NMI。

   我监控了该寄存器，OSCOFF 为1，但程序在 "while (nmiISRFlag！= true"时暂停。  

   nmiISRFlag 在 NMI_ISR 中设置、因此似乎没有触发 NMI。

   我尝试强制使用 CLKFAIL、交叉输入代码正常。 请参见下图。

   现在的问题是，如何触发 CLKFAIL NMI。

此致！

杨景平

让我在芯片上测试一下这一点、并在接下来的几个工作日内与您联系。

您好、专家

//#############################################################################
//
// FILE:  sta_main.c
//
// TITLE: Self Test Application Main source
//
//#############################################################################
// $TI Release: F2807x Diagnostic Library v1.00.02.00 $
// $Release Date: Mon Dec 18 17:00:32 CST 2017 $
// $Copyright:
// Copyright (C) 2016-2017 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 for device configuration
//
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include "driverlib.h"
#include "device.h"
#include "F2807x_device.h"
#include "F021_F2837xD_C28x.h"

//
// Included files for test-infrastructure.
//
#include "sta_timer.h"
#include "sta_tests.h"
#include "sta_comm.h"

//
// Globals
//
int16_t enableErrorInject;
int16_t enableReset;
volatile bool nmiISRFlag = false;
uint16_t nmiStatus = 0U;
bool mcdDetect = false;
uint32_t result = 1;
uint32_t fail = 0U;

//
// Prototypes
//
void STA_Main_configXCLKOut(void);
Fapi_StatusType STA_Main_initFlashAPI(void);



#ifdef _FLASH
// These are defined by the linker (see device linker command file)
extern uint16_t RamfuncsLoadStart;
extern uint16_t RamfuncsLoadSize;
extern uint16_t RamfuncsRunStart;

extern uint16_t HwbistLoadStart;
extern uint16_t HwbistLoadSize;
extern uint16_t HwbistRunStart;
#endif

//
// Function Prototypes
//
__interrupt void nmi_isr(void);

//
// Main
//
void main(void)
{

#ifdef _FLASH
    memcpy(&HwbistRunStart, &HwbistLoadStart, (size_t)&HwbistLoadSize);
#endif

    unsigned char *msg;
    uint16_t testIndex = 0;
    Fapi_StatusType statusFlashAPI =  Fapi_Status_Success;

    enableErrorInject = 0;
    uint16_t nmiWatchdogPeriod = 0x1000;
    //
    // Configure PLL, disable WD, enable peripheral clocks.
    //
    Device_init();

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

    //***********************************
    //added by yang for debug
    GPIO_setPinConfig(GPIO_43_GPIO43);
    GPIO_setDirectionMode(43,GPIO_DIR_MODE_OUT);
    GPIO_setPadConfig(43,GPIO_PIN_TYPE_STD);
    GPIO_writePin(43,1);
    //************************************
    //
    // Put watchdog in interrupt mode.
    //
    SysCtl_setWatchdogMode(SYSCTL_WD_MODE_INTERRUPT);

 //   statusFlashAPI = STA_Main_initFlashAPI();

 //   if(statusFlashAPI != Fapi_Status_Success)
 //   {
 //       ESTOP0;
 //   }

    //
    // Disable global interrupts.
    //
  //  DINT;

    //
    // Initialize interrupt controller and vector table.
    //
    Interrupt_initModule();
    Interrupt_initVectorTable();

    SysCtl_clearAllNMIFlags();
    Interrupt_register(INT_NMI, &nmi_isr);
    SysCtl_setNMIWatchdogPeriod(nmiWatchdogPeriod);
    //
    // Enabling the NMI global interrupt (typically already enabled by boot ROM
    // or GEL file).
    //
    EALLOW;
    HWREGH(NMI_BASE + NMI_O_CFG) |= NMI_CFG_NMIE;
    EDIS;
    Interrupt_enable(INT_NMI);
    EINT;
    ERTM;

    if(SysCtl_getClock(DEVICE_OSCSRC_FREQ) != DEVICE_SYSCLK_FREQ)
    {
       fail++;
    }
    SysCtl_enableMCD();
    SysCtl_disconnectMCDClockSource();

    fail=3;
    while(nmiISRFlag != true)
    {
        fail++;
    }
    fail=5;
    // A missing clock was detected.
    //
    if(mcdDetect != true)
    {
        fail++;
    }

    // Check if the NMI triggered was due to a clock failure.
    //
    if((nmiStatus & SYSCTL_NMI_CLOCKFAIL) != SYSCTL_NMI_CLOCKFAIL)
    {
        fail++;
    }

    // Check the PLL System clock after the Missing clock detection
    // is simulated. It should be equal to INTOSC1(10Mhz).
    //
    if(SysCtl_getClock(DEVICE_OSCSRC_FREQ) != SYSCTL_DEFAULT_OSC_FREQ)
    {
        fail++;
    }
    // To lock the PLL after missing clock detection, we first explicitly
        // switch the clock source to INTOSC1, reset the missing clock detect
        // circuit, and then re-lock the PLL.
        //
        // Configure oscillator source to INTOSC1.
        //
    SysCtl_selectOscSource(SYSCTL_OSCSRC_OSC1);
    SysCtl_connectMCDClockSource();
    // Reset the missing clock detection logic after clock failure.
    //
    SysCtl_resetMCD();
    // Set up PLL control and clock dividers using the original clock source.
    //
    SysCtl_setClock(DEVICE_SETCLOCK_CFG);
    // Check the system clock after the missing clock detection is cleared
    // and handled using INTOSC1 as clock source.
    //
    if(SysCtl_getClock(DEVICE_OSCSRC_FREQ) != DEVICE_SYSCLK_FREQ)
    {
       fail++;
    }
    // Status of a successful handling of missing clock detection.
    //
    if(fail != 0U)
    {
       result = 1;    //fail
    //   GPIO_writePin(43,0);
    }
    else
    {
       result = 0;   //pass
    //   GPIO_writePin(43,0);
    }
    while(1);
    //
    // Debug
    //
   // STA_Main_configXCLKOut();

    //
    // Configure SCI A as the main communication port
    //
  //  STA_Comm_configSCIA();

    //
    // Configure Timer 0 as the main time-out timer
    //
  //  STA_Timer_config(4000U);

//#if STA_UTIL_PROFILE
//    STA_Util_configProfiler(CPUTIMER1_BASE);
//#endif

    //
    // Enable Global Interrupt (INTM) and real time interrupt (DBGM)
    //
//    EINT;
//    ERTM;

    //
    // Send starting message.
    //
 //   msg = "\r\n\n\nBegin Test\0";
//    STA_Comm_transmitData(msg);

 /*   for(;;)
    {

        if(STA_Timer_isTimedOut())
        {

            if(enableErrorInject)
            {
                STA_Tests_injectErrorEnable();
            }
            else
            {
                STA_Tests_injectErrorDisable();
            }

            if(enableReset)
            {
                STA_Tests_enableReset();
            }
            else
            {
                STA_Tests_disableReset();
            }

            STA_Comm_transmitData(
                     STA_Tests_testDevice(STA_Tests_testArray[testIndex++]));

            if(testIndex >= STA_TESTS_NUMBERS)
            {
                testIndex = 0U;
            }
            STA_Timer_restart();
        }
    }  */
}

//
// STA_Main_configXCLKOut(void)
//
void STA_Main_configXCLKOut(void)
{
    // Configure GPIO 73 as SYSCLK out
    GPIO_setPadConfig(73,GPIO_PIN_TYPE_STD);
    GPIO_setPinConfig(GPIO_73_XCLKOUT);
    // Clock source is SYSCLK
    SysCtl_selectClockOutSource(SYSCTL_CLOCKOUT_SYSCLK);
    EALLOW;
    // XCLOCK out = clock source /8
    HWREG(CLKCFG_BASE + SYSCTL_O_XCLKOUTDIVSEL) = 3U;
    EDIS;
}

//
// STA_Main_initFlashAPI(void)
//
#pragma CODE_SECTION(STA_Main_initFlashAPI, ".TI.ramfunc");
Fapi_StatusType STA_Main_initFlashAPI(void)
{
    Fapi_StatusType returnStatus;
    //
    // Disable ECC when initializing the Flash API
    //
    Flash_disableECC(FLASH0ECC_BASE);

    EALLOW;

    //
    // This function is required to initialize the Flash API based on System
    // frequency before any other Flash API operation can be performed
    //
    returnStatus = Fapi_initializeAPI(F021_CPU0_BASE_ADDRESS,
                                      DEVICE_SYSCLK_FREQ / 1000000U);

    EDIS;

    return(returnStatus);
}

//
// nmiISR -  The interrupt service routine called when the NMI
//           is generated on clock failure detection.
//
__interrupt void nmi_isr(void)
{
    nmiISRFlag = true;
    mcdDetect = SysCtl_isMCDClockFailureDetected();
    nmiStatus = SysCtl_getNMIFlagStatus();
    SysCtl_clearAllNMIFlags();
    GPIO_writePin(43,0);
}

//
// End of File
//

  这是我的源代码。

  您能否通过邮件向我提供经过测试的项目。

此致！

杨景平

您的输入时钟是什么？ INTOSC1/INTOSC2、X1 (或) XTAL？

我看不到创建了缺失的时钟条件。 MCDCR.MCLKSTS 未设置为1。

您可以尝试另一台设备吗？ 我想知道您的器件是否有缺陷。

它是 XTAL、20MHz。

是的、它看起来缺少时钟条件、但未创建。

如前所述、我能够生成缺少时钟条件、这是我之前的帖子中附加的代码、并且能够在 CLOCKFAIL 条件下生成 NMI 中断。

我建议您在不同的器件上尝试该实验。 您可能正在处理有缺陷的器件(可能是 ESD 故障)

您好、专家、

  我有 NMI、请参阅下图、

 但您可以看到、它输入了默认的 NMI_ISR、而不是我定义的中断函数。           interrupt_register (INT_NMI、STL_MCD_MisingClockNMIISR)；     

//###########################################################################
//
// FILE:  stl_mcd.c
//
// TITLE: Diagnostic Library Missing Clock Detect software module source
//
//###########################################################################
// $TI Release: F2807x Diagnostic Library v1.00.02.00 $
// $Release Date: Mon Dec 18 17:00:32 CST 2017 $
// $Copyright:
// Copyright (C) 2016-2017 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.
// $
//###########################################################################

//
// Includes
//
#include "stl_mcd.h"
#include "stl_util.h"
#include "sysctl.h"
#include "interrupt.h"

//
// Defines
//
#define STL_MCD_PIE_NMI_OFFSET      0x0024U

//
// Globals
//
volatile static bool STL_MCD_missingClockDetectedFlag = false;

//*****************************************************************************
//
// STL_MCD_missingClockNMIISR(void)
// DID_07_16
//*****************************************************************************
__interrupt void STL_MCD_missingClockNMIISR(void)
{
    uint16_t watchdogCount1;
    uint16_t watchdogCount2;

    //
    // Get the MCD status.
    // DID_07_17
    //
    STL_MCD_missingClockDetectedFlag = SysCtl_isMCDClockFailureDetected();

    //
    // DID_07_19
    //

    //
    // Read WDCNT.
    //
    watchdogCount1 = SysCtl_getNMIWatchdogCounter();

    NOP;
    NOP;

    //
    // Read WDCNT.
    //
    watchdogCount2 = SysCtl_getNMIWatchdogCounter();

    //
    // Ensure the WDCNT has decreased.
    // DID_07_20
    //
    if(watchdogCount1 >= watchdogCount2)
    {
        //
        // Set the global error flag.
        //
        STL_Util_setErrorFlag(STL_UTIL_NMIWD);
    }

    //
    // Clear the NMI CLOCKFAIL flag and NMIINT flag if it is
    // the only flag left.
    // DID_07_18
    //
    SysCtl_clearNMIStatus(SYSCTL_NMI_CLOCKFAIL);
}

//*****************************************************************************
//
// STL_MCD_detect(const uint16_t nmiWatchdogPeriod, const uint16_t delay)
// DID_07_03, DID_07_04
//*****************************************************************************
uint16_t STL_MCD_detect(const uint16_t nmiWatchdogPeriod,
                        const uint16_t delay)
{
    /*LDRA_INSPECTED 8 D MR:R.2.2 Comment_8D*/
    uint16_t testStatus;
    uint32_t previousNMIVector;

    //
    // Reset the global missing clock detected flag.
    //
    STL_MCD_missingClockDetectedFlag = false;

    //
    // Clear any pending NMI flags.
    // DID_07_05
    //
    SysCtl_clearAllNMIFlags();

    //
    // Set the input NMI watchdog period.
    // DID_07_07
    //
    SysCtl_setNMIWatchdogPeriod(nmiWatchdogPeriod);

    //
    // DID_07_06, DID_07_08
    //

    //
    // Save previous NMI.
    //
    previousNMIVector = HWREG(PIEVECTTABLE_BASE + STL_MCD_PIE_NMI_OFFSET);

    //
    // Register the test NMI ISR.
    //
    Interrupt_register(INT_NMI, STL_MCD_missingClockNMIISR);

    //
    // Enable missing clock detection logic.
    // DID_07_21
    //
    SysCtl_enableMCD();

    //
    // Connect OSCCLK to missing clock detection logic.
    //
    SysCtl_connectMCDClockSource();

    //
    // Disable PLL. Ensure the PLL is out of our clock tree.
    //
    EALLOW;
    HWREGH(CLKCFG_BASE + SYSCTL_O_SYSPLLCTL1) &= ~(SYSCTL_SYSPLLCTL1_PLLCLKEN |
                                                   SYSCTL_SYSPLLCTL1_PLLEN);
    EDIS;

    //
    // Force a missing clock.
    // DID_07_09, DID_07_10
    //
//    EALLOW;
//    HWREGH(CLKCFG_BASE + SYSCTL_O_CLKSRCCTL1) |= SYSCTL_CLKSRCCTL1_INTOSC2OFF |
//                                                 SYSCTL_CLKSRCCTL1_XTALOFF;
//    EDIS;

    SysCtl_disconnectMCDClockSource();   //yang
    //
    // Need a short delay here (depending on SYSCLK) if disconnecting the clock
    // source does not generate an immediate interrupt.
    // DID_07_11
    //
    SysCtl_delay(delay);
    //
    // DID_07_12
    //
    if(STL_MCD_missingClockDetectedFlag && !((bool)SysCtl_getNMIFlagStatus()))
    {
        //
        // DID_07_14
        //
        testStatus = STL_MCD_PASS;
    }
    else
    {
        //
        // DID_07_13
        //

        //
        // Set the global error flag.
        //
        STL_Util_setErrorFlag(STL_UTIL_MCD);

        testStatus = STL_MCD_FAIL;
    }

    //
    // Restore and reset the clock.
    // DID_07_15
    //
    EALLOW;
    HWREGH(CLKCFG_BASE + SYSCTL_O_CLKSRCCTL1) &=
                   ~(SYSCTL_CLKSRCCTL1_INTOSC2OFF | SYSCTL_CLKSRCCTL1_XTALOFF);
    EDIS;

    //
    // Reset missing clock detection mechanism.
    //
    SysCtl_resetMCD();

    //
    // Restore NMI.
    // DID_07_06
    //
    Interrupt_register(INT_NMI, (void (*)(void))previousNMIVector);

    return(testStatus);
}

//
// End of File
//

 从源代码中，我定义了 NMI 中断   __interrupt void STL_MCD_MisingClockNMIISR (void)

 并记录 了中断   中断_寄存器(INT_NMI、STL_MCD_MisingClockNMIISR)；

  是否有配置 NMI 的地方？