s32k144 chip reset by watchdog, but cannot enter watchdog irq

[郑文豪]

I disable WDOG_DRV_Trigger(INST_WATCHDOG1) function so that chip can reset by watchdog if timeout.

Code:

/* Including needed modules to compile this module/procedure */

#include "Cpu.h"

#include "clockMan1.h"

#include "pin_mux.h"

#include "watchdog1.h"

#include "pwrMan1.h"

#if CPU_INIT_CONFIG

  #include "Init_Config.h"

#endif

volatile int exit_code = 0;

/* User includes (#include below this line is not maintained by Processor Expert) */

#include <stdint.h>

#include <stdbool.h>

/* To use with other board than EVB please comment the following line */

#define EVB

#ifdef EVB

    #define LED0            15U

    #define LED1            16U

    #define LED_GPIO        PTD

#else

    #define LED0             0U

    #define LED1             1U

    #define LED_GPIO        PTC

#endif

/* Initialize SysTick counter */

void SysTick_Init(void)

{

S32_SysTick->RVR = 0xFFFFFFul;

S32_SysTick->CVR = 0ul;

S32_SysTick->CSR = 0u;

}

/* Enable SysTick counter and interrupt */

void SysTick_Enable(void)

{

S32_SysTick->CSR = S32_SysTick_CSR_TICKINT(1u) | S32_SysTick_CSR_ENABLE(1);

}

/* Disable SysTick */

void SysTick_Disable(void)

{

S32_SysTick->CSR = 0ul;

}

/* SysTick IRQ handler */

void SysTick_Handler(void)

{

/* Variable that stores the number of Watchdog triggers */

static uint8_t s_refreshNumber = 0;

/* After 8 watchdog refreshes, the interrupt will no longer reset the wdog counter */

if(s_refreshNumber <

{

/* Reset Watchdog counter */

// WDOG_DRV_Trigger(INST_WATCHDOG1);

/* Toggle LED0 */

PINS_DRV_TogglePins(LED_GPIO, (1 << LED0));

/* Increment refresh number */

s_refreshNumber++;

}

}

/* WatchDog IRQ handler */

void WDOG_ISR(void)

{

/* Turn off both LEDs */

    PINS_DRV_SetPins(LED_GPIO, (1 << LED0) | (1 << LED1));

/* Disable the SysTick timer */

SysTick_Disable();

}

/*! 

  \brief The main function for the project.

  \details The startup initialization sequence is the following:

 * - __start (startup asm routine)

 * - __init_hardware()

 * - main()

 *   - PE_low_level_init()

 *     - Common_Init()

 *     - Peripherals_Init()

*/

int main(void)

{

  /* Write your local variable definition here */

  /*** Processor Expert internal initialization. DON'T REMOVE THIS CODE!!! ***/

  #ifdef PEX_RTOS_INIT

    PEX_RTOS_INIT();                 /* Initialization of the selected RTOS. Macro is defined by the RTOS component. */

  #endif

  /*** End of Processor Expert internal initialization.                    ***/

    /* Initialize and configure clocks

     *  -   Setup system clocks

     *  -   Enable clock feed for Ports

     *  -   See Clock Manager component for more info

     */

    CLOCK_SYS_Init(g_clockManConfigsArr, CLOCK_MANAGER_CONFIG_CNT,

                        g_clockManCallbacksArr, CLOCK_MANAGER_CALLBACK_CNT);

    CLOCK_SYS_UpdateConfiguration(0U, CLOCK_MANAGER_POLICY_AGREEMENT);

    /* Initialize pins

     *  -   Setup output pins for LEDs

     *  -   See PinSettings component for more info

     */

    PINS_DRV_Init(NUM_OF_CONFIGURED_PINS, g_pin_mux_InitConfigArr);

    /* Stop if the previous reset was caused by the Watchdog */

    if(POWER_SYS_GetResetSrcStatusCmd(RCM, RCM_WATCH_DOG) == true)

    {

    /* Turn on both LEDs */

        PINS_DRV_WritePin(LED_GPIO, LED0, 0u);

        PINS_DRV_WritePin(LED_GPIO, LED1, 0u);

    }

    else

    {

    /* Turn off both LEDs */

PINS_DRV_WritePin(LED_GPIO, LED0, 1u);

PINS_DRV_WritePin(LED_GPIO, LED1, 1u);

/* Install IRQ handlers for WDOG and SysTick interrupts */

INT_SYS_InstallHandler(WDOG_EWM_IRQn, WDOG_ISR, (isr_t *)0);

INT_SYS_InstallHandler(SysTick_IRQn, SysTick_Handler, (isr_t *)0);

/* Enable Watchdog IRQ */

INT_SYS_EnableIRQ(WDOG_EWM_IRQn);

/* Configure and enable SysTick */

SysTick_Init();

SysTick_Enable();

/* Initialize WDOG */

WDOG_DRV_Init(INST_WATCHDOG1, &watchdog1_Config0);

    }

    while(1)

    {

    ;

    }

  /*** Don't write any code pass this line, or it will be deleted during code generation. ***/

  /*** RTOS startup code. Macro PEX_RTOS_START is defined by the RTOS component. DON'T MODIFY THIS CODE!!! ***/

  #ifdef PEX_RTOS_START

    PEX_RTOS_START();                  /* Startup of the selected RTOS. Macro is defined by the RTOS component. */

  #endif

  /*** End of RTOS startup code.  ***/

  /*** Processor Expert end of main routine. DON'T MODIFY THIS CODE!!! ***/

  for(;;) {

    if(exit_code != 0) {

      break;

    }

  }

  return exit_code;

  /*** Processor Expert end of main routine. DON'T WRITE CODE BELOW!!! ***/

} /*** End of main routine. DO NOT MODIFY THIS TEXT!!! ***/

/* END main */

/*!

** @}

*/

/*

** ###################################################################

**

**     This file was created by Processor Expert 10.1 [05.21]

**     for the Freescale S32K series of microcontrollers.

**

** ###################################################################

*/

[danielmartynek · Accepted solution]

Hello,

The interrupt is active only for 128 bus clock cycles and after that the MCU is reset.

It was discussed here:

https://community.nxp.com/t5/S32K/WDOG-direct-reset-does-not-enter-the-interrupt-S32K144/m-p/724793

You can toggle the GPIOs a few times in the ISR and scope the pins.

Regards,

Daniel