S32K118 Watchdog Issue

bjs — Sat, 25 May 2024 14:05:17 GMT

Hi,

I have a demo project developed on s32k118evb board with watchdog disabled and it works well but after I download the project to my prototype PCB board the program triggers a watchdog timeout.

Is there anything I missed to disable the watchdog timer?

====== Below is the board initialization code ======

/* Board Initialization */

void Board_Init()

{

#if 1

DISABLE_INTERRUPTS(); // disable global interrupt

WDOG->CNT=0xD928C520; /* Unlock watchdog */

WDOG->TOVAL=0x0000FFFF; /* Maximum timeout value */

WDOG->CS = 0x00002100; /* Disable watchdog */

ENABLE_INTERRUPTS(); // enable global interrupt

#endif

/* Clock */

CLOCK_DRV_Init(&clockMan1_InitConfig0);

PINS_DRV_Init(NUM_OF_CONFIGURED_PINS, g_pin_mux_InitConfigArr);

/*** SPI ***/

LPSPI_DRV_MasterInit(MLX,&mlxState,&mlx_MasterConfig0);

/*** LPIT ***/

LPIT_DRV_Init(INST_LPIT1, &lpit1_InitConfig);

LPIT_DRV_InitChannel(INST_LPIT1, CHAN_0, &lpit1_ChnConfig0);

INT_SYS_InstallHandler(LPIT0_IRQn, &LPIT_ISR, (isr_t *)0);

LPIT_DRV_StartTimerChannels(INST_LPIT1, CHAN_0_MASK);

/*** CAN ***/

/* Initialize can pal instance */

/* !!! PE clock source MUST be peripheral clock !!! */

CAN_Init(&hscan_instance, &hscan_Config0);

/* Set buffer configuration */

CAN_ConfigTxBuff(&hscan_instance, TX_MAILBOX, &TxbuffCfg);

msg.id = HSCAN_ID;

msg.cs = 0U;

msg.length = 8;

/*** SBC Control ***/

// Set SBC control pin to enter normal mode

PINS_DRV_SetPins(STBN_PORT, STBN_PIN);

}

Re: S32K118 Watchdog Issue

Robin_Shen — Mon, 27 May 2024 09:09:46 GMT

If you are using the S32K1 SDK examples, there is DISABLE_WDOG in system_S32K118.c and system_S32K118.h that can be used to disable the watchdog:
/SDK/platform/devices/S32K118/startup/system_S32K118.c

But I don't understand why it runs normally on S32K118EVB but errors occur on your prototype PCB board. Have you compared the differences between crystal circuits?

Best Regards,
Robin
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