MK66FX - WDOG do not work

[Anonymous]

Hi,

i have a board based on MK66FX1M0 uC , i have configured WDOG but when i try to reset the internal counter nothing seems to change, can someone help me?

My code : 

/**
* @file test_mk66fx.c
* @brief Application entry point.
*/
#include <stdio.h>
#include "board.h"
#include "peripherals.h"
#include "pin_mux.h"
#include "clock_config.h"
#include "MK66F18.h"

/* TODO: insert other include files here. */
#include "fsl_gpio.h"
#include "fsl_wdog.h"

/* Define I/O PIN*/

#define BOOT_LED 28U // pin 28 of GPIOE - NOTE : InitBootPins() switch on the led

/* TODO: insert other definitions and declarations here. */
void setup(void);
void loop(void);

/*
* @brief Application entry point.
*/
int main(void) {
/* Init board hardware. */
BOARD_InitBootPins();
BOARD_InitBootClocks();
BOARD_InitBootPeripherals();
//dopo la fase di setuo scheda spegne il led
GPIO_PinWrite(GPIOE,BOOT_LED,1); // switch off led - The led is switched on with InitBootPins()
setup();
WDOG_Refresh(WDOG_PERIPHERAL); // Reset The whatcdog
/* Enter an infinite loop*/
while(1) {
loop();
WDOG_Refresh(WDOG_PERIPHERAL);
}
return 0 ;
}

void setup(void){
}

void loop(void){

}

Peripherals configuration : 

[nxf58904 · Accepted solution]

Hi,

Please add the statement as follow shows,

while (GetTimerOutputValue(wdog_base) < (WDOG_config.timeoutValue >> 3U))
{
}

I have recur your issue and fix after add this statement.

Have a great day,
TIC

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[ahmedhrabi]

HI  @nxf58904, 

Have you any explications, why we have to wait (WDOG_config.timeoutValue >> 3U), which is about the the timeout value/8, to can refresh again the Wdog. This delay is too long (for a Wdg timeout of 500 ms per example we have a delay of 500 ms >> 3U = 62 ms to wait before refreshing again !!) . 

I noticed that in my project i have the same issue, if i refresh the wdg before the WDOG_config.timeoutValue >> 3U delay, the Wdog reset automatically the chip. 

Regards. 

[Anonymous]

Hi,
I have try the code and now it work god.
My final code is :

void WDOG_RESET(){
WDOG_Refresh(WDOG_PERIPHERAL); // Reset The whatcdog
while (GetTimerOutputValue(WDOG_PERIPHERAL) < (WDOG_config.timeoutValue >> 3U))
{
}
}

static inline uint32_t GetTimerOutputValue(WDOG_Type *base)
{
return (uint32_t)((((uint32_t)base->TMROUTH) << 16U) | (base->TMROUTL));
}

[Anonymous]

Yes when i try to refresh the watch dog counter it will continue to work and the onboard led will blink

[nxf58904]

Hi,

You mean nothing had changed when you reset the counter,what you mean is that you reset the counter but the cnt didn't reset?

When you refresh the counter , the watch dog will continue to work. Only when the watch dog was time out,it will reset the Mcu.

Have a great day,
TIC

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 days after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
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