Lpc2000

hi everybody

well i am trying to explore the WDT in LPC 2129.
I am displaying a hex value through UART when WDT generates the 
interrupt.
but iam not able to get interrupt .
can any one tell me how to do this 

thanks

Hi,

Please show your source code to do this.

Suriyan.

--- In lpc2000@yahoogroups.com, "seeessarr" <csr1981@r...> wrote:

> hi everybody
> 
> well i am trying to explore the WDT in LPC 2129.
> I am displaying a hex value through UART when WDT generates the 
> interrupt.
> but iam not able to get interrupt .
> can any one tell me how to do this 
> 
> thanks

thanks Suriyan for ur response.

well i was able to get the interrupt from the WDT but i am not able to acknowledge the same i.e. when the watchdog interrupt occurred i displayed a value through UART.But the value was continuously displayed.
the source code is as follows:-

************************************************************

#define VICINTSEL (volatile unsigned int *)0XFFFFF00C
#define VICVECTADDR0 (volatile unsigned int *)0xFFFFF100
#define VICVECTCNTL0 (volatile unsigned int *)0xFFFFF200

#define VICINTEN (volatile unsigned int *)0xFFFFF010
#define VICVECTADDR (volatile unsigned int *)0xFFFFF030


#define WDMOD (volatile unsigned int *)0xE0000000		
#define WDTC (volatile unsigned int *)0xE0000004
#define WDFEED (volatile unsigned int *)0xE0000008
#define WDTV (volatile unsigned int *)0xE000000C
  
extern UART(int);

void WDINT(void) __attribute__((interrupt("irq")));

main()
{
int i,j;

UART(0x111);

*VICVECTADDR0=(unsigned int)&WDINT;

*VICINTSEL=0X00000000;		/*to enable each interrupt as IRQ*/

*VICVECTCNTL0=0X00000020;	/*to control the WD interrupt i.e. 1st bit*/

*VICINTEN=0X00000001;		/*to enable WD interrupt*/

*WDTC=0x00Cccc00;

*WDMOD=0x00000001;

*WDFEED=0xAA;

*WDFEED=0x55;

j=*WDMOD;

UART(j);

__asm__("MRS R0,CPSR");		/*ENABLING THE IRQ*/
__asm__("MVN R1,#0X80");
__asm__("AND R0,R0,R1");
__asm__("MSR CPSR,R0");

while(1);

}


void WDINT()
{

int k;

k=*WDMOD;

*WDMOD=0x01;

*WDFEED=0xAA;

*WDFEED=0x55;

UART(0x123);

*VICVECTADDR=0x00000000;
}

****************************************************************

thanks 
and regards 

Chetan




































On Tue, 21 Jun 2005 misstero wrote :
>Hi,
>Please show your source code to do this.
>Suriyan.
>--- In lpc2000@yahoogroups.com, "seeessarr" <csr1981@r...> wrote:
>> hi everybody
>>
>> well i am trying to explore the WDT in LPC 2129.
>> I am displaying a hex value through UART when WDT generates the
>> interrupt.
>> but iam not able to get interrupt .
>> can any one tell me how to do this
>>
>> thanks
>Yahoo! Groups Links
>To visit your group on the web, go to:
>http://groups.yahoo.com/group/lpc2000/
> 
>
>To unsubscribe from this group, send an email to:
>lpc2000-unsubscribe@yahoogroups.com
> 
>
>Your use of Yahoo! Groups is subject to the
>Yahoo! Terms of Service
>.
>


[Non-text portions of this message have been removed]

Hi,

On Tuesday 21 June 2005 16:09, chetan s rao wrote:
> well i was able to get the interrupt from the WDT but i am not
> able to acknowledge the same i.e. when the watchdog interrupt
> occurred i displayed a value through UART.But the value was
> continuously displayed.

I think you toggle the watchdog. This will restart the time 
measurements. After the next timeout you get a new interrupt.


-- 
Steffen Rose