Configuring WDG

thiru · ‎2008-09-08

Posted on September 08, 2008 at 16:33

Configuring WDG

thiru · ‎2011-05-17

Posted on May 17, 2011 at 09:55

With the below piece of code, i am able to generate an interrupt at every

0.35sec (350msec).

1. Can anyone tell how this stuff works?

2. Also, I want to change a little bit this code and generate an interrupt at my own specified msec?

Thanks in advance,

Thanga

/***********************************************************************/

#define WDG_ClockSource_Apb 0xFFFB /*The APB clock signal will be used as counting clock.*/

/* Configure the WDG to generate an EOC interrupt each 0.35s */

WDG_DeInit();

WDG_InitStructure.WDG_Preload = 0xFFFF;

WDG_InitStructure.WDG_Prescaler = 0xFF;

WDG_InitStructure.WDG_ClockSource=WDG_ClockSource_Apb;

WDG_Init(&WDG_InitStructure);

/* Configure the VIC */

VIC_DeInit(); /* Initialize the VIC*/

VIC_InitDefaultVectors(); /* Initialize default vector registers*/

/* Configure the VIC interrupt */

VIC_Config(WDG_ITLine,VIC_IRQ,0);

VIC_ITCmd(WDG_ITLine, ENABLE); /* Enable the VIC */

WDG_ITConfig(ENABLE); /* Enable the WDG interrupt */

/* Enable the WDG in Timer mode*/

WDG_TimerModeCmd(ENABLE);

/***********************************************************************/

ricardo2399 · ‎2011-05-17

Posted on May 17, 2011 at 09:55

hi

1st and just as a remark, do not forget to enable clock to WDT or it wonÂ´t work.

2nd, maybe using 91x_scu.c functions, you could get peripheric clock and calc your own time.

Take a little look over it, it might help.

good luck

thiru · ‎2011-05-17

Posted on May 17, 2011 at 09:55

I have configured the WDG clock, and it's working (interrupt generated) at every 0.35second.

Currently i need to genarate an interrupt at an user specified rate.

any ideas will be appriciated.

ricardo2399 · ‎2011-05-17

Posted on May 17, 2011 at 09:55

hi

''from 2, three'' =P

or you reprogram WDT to the time interval you wont every time you need to program a diferent one;

or you build a couter routine on the WDT ISR routine, wich generate a different software interrupt, where the counter have the N times WDT, needed to generate that other interrupt;(this interrupt could be from a non used EXTINT for example)