From mboxrd@z Thu Jan  1 00:00:00 1970
From: Carlos Camargo <carlos_ivan_camargo@yahoo.com>
To: Jesper Skov <jskov@cambridge.redhat.com>
Cc: ecos-discuss@sources.redhat.com
Subject: Re: [ECOS] Redboot Questions
Date: Tue, 10 Jul 2001 03:28:00 -0000
Message-id: <20010710102801.83592.qmail@web14002.mail.yahoo.com>
References: <ot66d1umk8.fsf@zoftcorp.adsl.dk>
X-SW-Source: 2001-07/msg00256.html

> Carlos> Exists any problem with spurious interrupts
> an CTRL-C
> Carlos> support???
> 
> Not understood.
> 
> Jesper

My question is:

Due that my interrupt source is EXT0 with the same
vector of spurious interrupt. This have any
problem????

I have the following program:


/****************************************************************
 *
 *	File		: counter.c
 *	Description	: Segment Display Programm 
 *	Author 		: Carlos Camargo
 *	Date		: 22/06/2001
 *

****************************************************************/
#include <cyg/kernel/kapi.h>
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <cyg/hal/hal_intr.h>

#include "segment.h"
#define SYSCFG		0x03ff0000
#define IOPMOD          ((volatile unsigned
*)(SYSCFG+0x5000))
#define IOPDATA         ((volatile unsigned
*)(SYSCFG+0x5008))
#define FOREVER		(1)	

cyg_thread thread_s[2];				/* space for two thread
objects */

char stack[2][4096];				/* space for two 4K stacks */

cyg_handle_t simple_threadA, simple_threadB;	/*
handles for the thread */

cyg_thread_entry_t program_A, program_B;	/* variables
for the procedure which is the thread */

cyg_handle_t int_0_ISR_H;

cyg_interrupt intr;

int toggle = 0;



cyg_uint32 int_0_isr(cyg_vector_t
vector,cyg_addrword_t data)
 {
   /* ISRs must acknowledge the interrupt, or they
might be invoked again */
   cyg_interrupt_acknowledge(vector);
   return CYG_ISR_CALL_DSR;
 }

			
 /* this is the DSR for ext 0 interrupts */
 void int_0_dsr(cyg_vector_t vector, cyg_ucount32
count, cyg_addrword_t data)
 {
     if ( toggle == 0){
     	cyg_thread_suspend( simple_threadA );
	cyg_thread_resume( simple_threadB );
	toggle = 1;
     }
     else {
     	cyg_thread_suspend		( simple_threadB );
	cyg_thread_resume ( simple_threadA );
	toggle = 0;
     }     
 }


static unsigned int numeric_display [16] = 
{
	DISP_0,	DISP_1,	DISP_2,	DISP_3,	DISP_4,
	DISP_5,	DISP_6,	DISP_7,	DISP_8,	DISP_9,
	DISP_A,	DISP_B,	DISP_C,	DISP_D,	DISP_E,
	DISP_F
};	

void cyg_user_start(void)
{
//  printf("Entering test' cyg_user_start()
function\n");
  
//  printf("Create Thread_A and Thread_B\n");


  cyg_thread_create(4, program_A, (cyg_addrword_t)
'A',
		    "Thread A", (void *) stack[0], 4096,
		    &simple_threadA, &thread_s[0]);
 
  cyg_thread_create(4, program_B, (cyg_addrword_t)
'B',
		    "Thread B", (void *) stack[1], 4096,
		    &simple_threadB, &thread_s[1]);

  /* create an interrupt handler with int_0_isr() as
the ISR and int_0_dsr() as the DSR.*/
  cyg_interrupt_create(CYGNUM_HAL_INTERRUPT_EXT0, 0,
0, &int_0_isr,
                       &int_0_dsr, &int_0_ISR_H,
&intr);
	

  cyg_interrupt_attach(int_0_ISR_H);		    
  cyg_interrupt_unmask(CYGNUM_HAL_INTERRUPT_EXT0);
  cyg_thread_resume(simple_threadB);
}


void program_A(cyg_addrword_t data)
{
  char message =  data;
  int seg;

  while ( FOREVER ){
    for ( seg=0xf; seg>=0; seg--) {
      if ( (seg >= 0) & (seg <= 0xf) ){
        *IOPDATA &= ~SEG_MASK;
	*IOPDATA |= numeric_display[seg];
      }
      cyg_thread_delay(100);
    }
  }
}

void program_B(cyg_addrword_t data)
{
  char message =  data;
  int seg;

//  printf("Beginning execution; thread data is %c\n",
message);
  
  while ( FOREVER ){
    for ( seg=0; seg<=0xf; seg++) {
      if ( (seg >= 0) & (seg <= 0xf) ){
        *IOPDATA &= ~SEG_MASK;
	*IOPDATA |= numeric_display[seg];
      }
      cyg_thread_delay(100);
    }
  }
}

/****************************************************************
 * END OF counter.c

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

When i run this program from insight The thread
simple_threadB running correctly, but when i press the
external button attach to EXT0, no acurrs any
interrupt.

My code is good, or i have any error.

Thanks


Carlos Camargo









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