Kinetis k60 watchdog reset occurs even when refreshing correctly.

kashyapgada — Mon, 28 Oct 2013 10:42:50 GMT

Hello

I am once again facing the Watchdog reset issue with k60 same way as i use to previously. I that time it worked but the same issue has cropped up once again and i dont understand the reason. while i refresh the watchdog and in debugging mode i am able to see it correctly refreshing it still resets. i have pasted my code here. Please someone have a look at it and help me out with the problem.

main.c and wdog.c files pasted

MAIN.c////////////////////////////////////////////

void main(void) {

disable_irq(45) ;

Init_Gpio();

gpio_init(PORTB, PTB, 1, OUTPUT); //Buzzer Output

// EnableInterrupts ;

wdog_init();

while(1) {

delay_wdog(10);

wdog_refresh();

Vertical G calculation

vertical_z_axis_g = z_axis_avg - 1000;

finalSendData[1] = vertical_z_axis_g/10;

Lateral G calculation

lateral_y_axis_g = y_axis_avg;

finalSendData[2] = lateral_y_axis_g/10;

}

///////////////////////////////////////////////////////////////////////////////////////////////////////

WDOG.h

#include "wdog.h"

#include "common.h" // Common Kinetis defines

void wdog_init(void){

wdog_unlock();

WDOG_STCTRLH = WDOG_STCTRLH_DISTESTWDOG_MASK //Disable WDOG Test Mode

| WDOG_STCTRLH_ALLOWUPDATE_MASK | WDOG_STCTRLH_WDOGEN_MASK | WDOG_STCTRLH_CLKSRC_MASK ; //Allow WDOG CTRL Ref Update

WDOG_TOVALH = 0x0020;

WDOG_WINL = WDOG_WINH = 0;

WDOG_TOVALL = 0x5fff;

// WDOG_PRESC = WDOG_PRESC_PRESCVAL(7);

WDOG_STCTRLH &= ~(WDOG_STCTRLH_ALLOWUPDATE_MASK) ;

}

void wdog_refresh(void) {

DisableInterrupts;

WDOG_REFRESH = WDOG_REFRESH_WDOGREFRESH(WDOG_REFRESH_SEQUENCE_1);

WDOG_REFRESH = WDOG_REFRESH_WDOGREFRESH(WDOG_REFRESH_SEQUENCE_2);

EnableInterrupts;

}

void wdog_enable(void){

delay_wdog(60);

wdog_unlock();

delay_wdog(1);

WDOG_STCTRLH |= WDOG_STCTRLH_WDOGEN_MASK;

delay_wdog(20);

}

void wdog_unlock(void)

{

/* NOTE: DO NOT SINGLE STEP THROUGH THIS FUNCTION!!! */

/* There are timing requirements for the execution of the unlock. If

* you single step through the code you will cause the CPU to reset.

/* This sequence must execute within 20 clock cycles, so disable

* interrupts will keep the code atomic and ensure the timing.

DisableInterrupts;

/* Write 0xC520 to the unlock register */

WDOG_UNLOCK = 0xC520;

/* Followed by 0xD928 to complete the unlock */

WDOG_UNLOCK = 0xD928;

/* Re-enable interrupts now that we are done */

EnableInterrupts;

}

void wdog_set_timeout(uint32_t time) {

}

void delay_wdog(uint16_t nCount) {

uint16_t delay = 0;

for (delay=0;delay<nCount*10;delay++);

}

void wdog_disable(void)

{

/* First unlock the watchdog so that we can write to registers */

wdog_unlock();

/* Clear the WDOGEN bit to disable the watchdog */

WDOG_STCTRLH &= ~WDOG_STCTRLH_WDOGEN_MASK;

}

Re: Kinetis k60 watchdog reset occurs even when refreshing correctly.

kashyapgada — Tue, 29 Oct 2013 05:53:35 GMT

No issues with the WDOG driver code, i found a link within my code where my code did not progress from there at all so the question's answer is bad written code.

also i found this problem by removing (commented) all the code within the while loop and just kept the wdog refresh code and found the it was working properly.

Thanks

topic Kinetis k60 watchdog reset occurs even when refreshing correctly. in Kinetis Microcontrollers

Kinetis k60 watchdog reset occurs even when refreshing correctly.

Re: Kinetis k60 watchdog reset occurs even when refreshing correctly.