Lpc2000

Hello everyone,

i´ve got a problem with the configuration of the external interrupt
EINT2(P0.15). The controller hangs up after 
"VICIntEnable = (1<<VIC_EINT2);           // Enable EINT2".

This is my code(gcc):

void EINT2_ISR(void){
  toggle_led();
  SCB_EXTINT = (1<<2);
  VICVectAddr = 0;
}

void init_interrupts(void){
  VICVectAddr0 = (unsigned long)EINT2_ISR;    // Save ISR Adress
  VICVectCntl0 = (1<<5) | (1<<VIC_EINT2);     // Enable VIC Control
Register
  VICIntEnable = (1<<VIC_EINT2);           // Enable EINT2
  toggle_led();
}

Here is the pinselect:
PCB_PINSEL0 = (1<<0)|(1<<2)|(1<<31); //UART0 TXD/RXD ,EINT2 on P0.15

And the define for VIC_EINT2:
#define VIC_EINT2       16

I can´t recognize any toggles of the LED.

Thanks for your efforts.

Greetings

Hello,

For a LPC 2294 i had a problem with EINT2. When i was configurating EXTMODE 
(EXTINT in your example) register my program was hanging.

I found solution in errata sheet. There is a problem with EINT2 and VPBDIV.

to program EXTMODE you must follow this procedure :
        sauve_VPBDIV = VPBDIV;
        VPBDIV  = 0;
        EXTMODE = 4;
        VPBDIV  = 4;
        VPBDIV  = sauve_VPBDIV;

Perhaps you have the same problem on LPC2124 see erra sheet of philipps.

----- Original Message ----- 
From: "fbpmania" <pmania@...>
To: <lpc2000@yahoogroups.com>
Sent: Wednesday, September 07, 2005 11:16 AM
Subject: [lpc2000] EINT2 Problems on LPC2124


Hello everyone,

i´ve got a problem with the configuration of the external interrupt
EINT2(P0.15). The controller hangs up after
"VICIntEnable = (1<<VIC_EINT2);           // Enable EINT2".

This is my code(gcc):

void EINT2_ISR(void){
  toggle_led();
  SCB_EXTINT = (1<<2);
  VICVectAddr = 0;
}

void init_interrupts(void){
  VICVectAddr0 = (unsigned long)EINT2_ISR;    // Save ISR Adress
  VICVectCntl0 = (1<<5) | (1<<VIC_EINT2);     // Enable VIC Control
Register
  VICIntEnable = (1<<VIC_EINT2);           // Enable EINT2
  toggle_led();
}

Here is the pinselect:
PCB_PINSEL0 = (1<<0)|(1<<2)|(1<<31); //UART0 TXD/RXD ,EINT2 on P0.15

And the define for VIC_EINT2:
#define VIC_EINT2       16

I can´t recognize any toggles of the LED.

Thanks for your efforts.

Greetings






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Hey Gilles Faurie,

i checked the Errata sheet and build in the workaround.
I´ve modified my Code to this:

void init_interrupts(void){
  SCB_MEMMAP = 1;         //interrupt vectors reside in flash
  toggle_led(28);toggle_led(28);toggle_led(28); // Function Start -
Blink 3 times
  VICProtection = 0;  //No Protection
  VICIntEnClear = 0xffffffff;  //Clear all Interrupts
  
  SCB_VPBDIV = 0x00;				// --- workaround for EXTINT2 bug
  SCB_EXTMODE = 0x04;				// set mode for EINT2
  SCB_VPBDIV = 0x02;				// ---
  SCB_VPBDIV = 0x01;				// --- end workaround
  SCB_EXTINT = 0x04;				// clear INT flags 
  VICIntSelect = 0x00000000;		// EINT2 is IRQ
  toggle_led(25);
  VICIntEnable = (1<<VIC_EINT2);	// Enable EINT2
  VICVectAddr0 = (unsigned long)EINT2_ISR;
  VICVectCntl0 = (1<<5) | (1<<VIC_EINT2);
  toggle_led(25);
  enableIRQ();
  toggle_led(25);
}

EnableIRQ comes from the armVIC.h , which is in the example dir of
WinARM.
My problem is, that the System hangs now on the execution of
"enableIRQ()".

Could it be, that there are some Problems with my Startup Code ?
I use the Startupcode from the UART Example included in WinARM.

Greetings

* fbpmania <pmania@...>:
> Could it be, that there are some Problems with
> my Startup Code ?  I use the Startupcode from
> the UART Example included in WinARM.

The external interrupts are broken. However
certain specific configurations do work. Search
the list. This has been discussed some weeks ago.

JR

--- In lpc2000@yahoogroups.com, Jean-Rene David <jrdavid@m...> wrote:
> * fbpmania <pmania@t...>:
> > Could it be, that there are some Problems with
> > my Startup Code ?  I use the Startupcode from
> > the UART Example included in WinARM.
> 
> The external interrupts are broken. However
> certain specific configurations do work. Search
> the list. This has been discussed some weeks ago.
> 
> JR
Hello JR,

do you mean the capture/match workaround ?

Greetings

* fbpmania <pmania@...>:
> do you mean the capture/match workaround ?

No. I mean the EXTINT.1, EXTINT.2, and VPBDIV.1
workarounds which in fact don't always work.

-- 
JR

Hey,

If i read the errata sheet you must program VPBDIV as the same value of 
EXTMODE. So i think that you must code :

  SCB_VPBDIV = 0x00; // --- workaround for EXTINT2 bug
  SCB_EXTMODE = 0x04; // set mode for EINT2
  SCB_VPBDIV = 0x04; // !!!!!!! --- (!!!!!! to program EXTMODE !!!!!)
  SCB_VPBDIV = 0x01; // --- end workaround (!!!!!! true value of VPBDIV 
!!!!!!!)

----- Original Message ----- 
From: "fbpmania" <pmania@...>
To: <lpc2000@yahoogroups.com>
Sent: Wednesday, September 07, 2005 4:05 PM
Subject: [lpc2000] Re: EINT2 Problems on LPC2124


Hey Gilles Faurie,

i checked the Errata sheet and build in the workaround.
I´ve modified my Code to this:

void init_interrupts(void){
  SCB_MEMMAP = 1;         //interrupt vectors reside in flash
  toggle_led(28);toggle_led(28);toggle_led(28); // Function Start -
Blink 3 times
  VICProtection = 0;  //No Protection
  VICIntEnClear = 0xffffffff;  //Clear all Interrupts

  SCB_VPBDIV = 0x00; // --- workaround for EXTINT2 bug
  SCB_EXTMODE = 0x04; // set mode for EINT2
  SCB_VPBDIV = 0x02; // ---
  SCB_VPBDIV = 0x01; // --- end workaround
  SCB_EXTINT = 0x04; // clear INT flags
  VICIntSelect = 0x00000000; // EINT2 is IRQ
  toggle_led(25);
  VICIntEnable = (1<<VIC_EINT2); // Enable EINT2
  VICVectAddr0 = (unsigned long)EINT2_ISR;
  VICVectCntl0 = (1<<5) | (1<<VIC_EINT2);
  toggle_led(25);
  enableIRQ();
  toggle_led(25);
}

EnableIRQ comes from the armVIC.h , which is in the example dir of
WinARM.
My problem is, that the System hangs now on the execution of
"enableIRQ()".

Could it be, that there are some Problems with my Startup Code ?
I use the Startupcode from the UART Example included in WinARM.

Greetings






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