Lpc2000

Hi im trying to make the interrupt work om a lpc2294. I am using 
timer 0 and see the interrupt being enabled (test routine on display) 
but the interrupt does NOT activate the interrupt routine. Ill put in 
some code so maybe someone can see my error??? And give a little 
help ??

than you (i hope)

Best regards 
Boje Demant

interrupt routine
static void Timer0Interrupt(void) __attribute__ ((interrupt ("IRQ")));
static void Timer0Interrupt(void){
//  (*timer_function)(); // Call timer callback function.
//
//   T0_TCR=0; //stop timer
//   T0_TCR=2; //Reset timer
//   T0_TCR=1; //start timer
   LIGHT_LCD_ON;
   T0_IR = 0xff; // Clear timer 0 interrupt line.
   VICVectAddr=0xff;
}




in main:

T0_PR=58982;  //setup prescaler = 1msek
T0_TCR=0x00000002; //Reset timer
T0_MR0= 1500; //2 (2 sek for  interrupt;
T0_MCR=0x00000003; //generate interrupt on match
VICProtection=0;  //
VICIntEnClear=0xffffffff; //disable all interrupts
VICSoftIntClear=0xffffffff;
VICDefVectAddr=(unsigned long)&DefInterrupt;
VICIntSelect=0x00000000;      //assigne interrupt timer 0 til type IRQ
VICVectAddr0= (unsigned long)&Timer0Interrupt;   //opsæt vector
VICVectCntl0= 0x00000024;                 //enable vector iterrupt

In the ISR, you need to reset the VIC using 0x00, not ff:
 
VICVectAddr = 0;
 
will work.
 
Also, in main:
 
VICIntSelect=0x00000000;      //assigne interrupt timer 0 til type IRQ

will not work.. you need to SET the bit for the specific VIC channel, such as:
 
VICIntSelect |= (1 << VIC_TIMER0);
 
or alike.
 
--fred


boje_d <boje_demant@...> wrote:
Hi im trying to make the interrupt work om a lpc2294. I am using 
timer 0 and see the interrupt being enabled (test routine on display) 
but the interrupt does NOT activate the interrupt routine. Ill put in 
some code so maybe someone can see my error??? And give a little 
help ??

than you (i hope)

Best regards 
Boje Demant

interrupt routine
static void Timer0Interrupt(void) __attribute__ ((interrupt ("IRQ")));
static void Timer0Interrupt(void){
//  (*timer_function)(); // Call timer callback function.
//
//   T0_TCR=0; //stop timer
//   T0_TCR=2; //Reset timer
//   T0_TCR=1; //start timer
   LIGHT_LCD_ON;
   T0_IR = 0xff; // Clear timer 0 interrupt line.
   VICVectAddr=0xff;
}




in main:

T0_PR=58982;  //setup prescaler = 1msek
T0_TCR=0x00000002; //Reset timer
T0_MR0= 1500; //2 (2 sek for  interrupt;
T0_MCR=0x00000003; //generate interrupt on match
VICProtection=0;  //
VICIntEnClear=0xffffffff; //disable all interrupts
VICSoftIntClear=0xffffffff;
VICDefVectAddr=(unsigned long)&DefInterrupt;
VICIntSelect=0x00000000;      //assigne interrupt timer 0 til type IRQ
VICVectAddr0= (unsigned long)&Timer0Interrupt;   //opsæt vector
VICVectCntl0= 0x00000024;                 //enable vector iterrupt 




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

You have a couple of faults:
In Interruption: VicVectAddr = 0; (Not 0xff)
In main, include:  
  VicIntEnable = 0x10;                    // Enable timer 0 interrupt

Regards


--- In lpc2000@yahoogroups.com, "DECwiz \(Fred van Kempen\)" 
<decwiz@y...> wrote:
> In the ISR, you need to reset the VIC using 0x00, not ff:
>  
> VICVectAddr = 0;
>  
> will work.
>  
> Also, in main:
>  
> VICIntSelect=0x00000000;      //assigne interrupt timer 0 til type 
IRQ
> 
> will not work.. you need to SET the bit for the specific VIC 
channel, such as:
>  
> VICIntSelect |= (1 << VIC_TIMER0);
>  
> or alike.
>  
> --fred
> 
> 
> boje_d <boje_demant@h...> wrote:
> Hi im trying to make the interrupt work om a lpc2294. I am using 
> timer 0 and see the interrupt being enabled (test routine on 
display) 
> but the interrupt does NOT activate the interrupt routine. Ill put 
in 
> some code so maybe someone can see my error??? And give a little 
> help ??
> 
> than you (i hope)
> 
> Best regards 
> Boje Demant
> 
> interrupt routine
> static void Timer0Interrupt(void) __attribute__ ((interrupt 
("IRQ")));
> static void Timer0Interrupt(void){
> //  (*timer_function)(); // Call timer callback function.
> //
> //   T0_TCR=0; //stop timer
> //   T0_TCR=2; //Reset timer
> //   T0_TCR=1; //start timer
>    LIGHT_LCD_ON;
>    T0_IR = 0xff; // Clear timer 0 interrupt line.
>    VICVectAddr=0xff;
> }
> 
> 
> 
> 
> in main:
> 
> T0_PR=58982;  //setup prescaler = 1msek
> T0_TCR=0x00000002; //Reset timer
> T0_MR0= 1500; //2 (2 sek for  interrupt;
> T0_MCR=0x00000003; //generate interrupt on match
> VICProtection=0;  //
> VICIntEnClear=0xffffffff; //disable all interrupts
> VICSoftIntClear=0xffffffff;
> VICDefVectAddr=(unsigned long)&DefInterrupt;
> VICIntSelect=0x00000000;      //assigne interrupt timer 0 til type 
IRQ
> VICVectAddr0= (unsigned long)&Timer0Interrupt;   //opsæt vector
> VICVectCntl0= 0x00000024;                 //enable vector iterrupt 
> 
> 
> 
> 
> SPONSORED LINKS 
> Microcontrollers Microprocessor Intel microprocessors Pic 
microcontrollers 8085 microprocessor 
> 
> ---------------------------------
> YAHOO! GROUPS LINKS 
> 
> 
>     Visit your group "lpc2000" on the web.
>   
>     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. 

> 
> 
> ---------------------------------
> 
> 
> 
> 		
> ---------------------------------
>  Start your day with Yahoo! - make it your home page 
> 
> [Non-text portions of this message have been removed]