Please HELP "Interrupt how to"

Please HELP "Interrupt how to"

[Syed Raza]

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Hi All

I am using EVB3067 and HDI (Hitachi Deb. Interface). I use Linux
(gcc-2.95.2, newlib-1.8.2, binutils-2.9) for compiling my C code.I want
to use two interrupts (receive and transmit).In FAQ it says that gcc
doesnt support writing interrupt handler.

What i have done is ..

i put the receive function (the one i want to call by an interrupt) in to
a vector table, then i compile my main program and vector table
saperately and then make an *.out file by linking with ldscript.
But i doestn work. Can any one please give my some hints how to do that


do i need to do any changes in my crt0.S file  ?

thanx in advance
syed

=======================================================
vector table "vect.c"
=============================================
#include "ioh83067.h"
extern void start(void);
void empty(void) { }
void my_interrupt (void)
{ 
}

typedef void  (*irq_func)(void);
irq_func _vectors[92] __attribute__ ((section (".vectors"))) =
{         
start, /* 0 */   
empty,/* 1 */
empty,/* 84 - ERI1 */    
receive,/* 85 - RXI1 */  
empty,/* 86 - TXI1 */    
};

=================================================
main.c 
================================================
#include "ioh83067.h"
#include "vect.c"
main 
{
}

Re: Please HELP "Interrupt how to"

[Russ.Shaw]

You put the function address in the interrupt table, and preceed the
actual function with something like: #pragma interrupt.

Syed Raza wrote:
> 
> Hi All
> 
> I am using EVB3067 and HDI (Hitachi Deb. Interface). I use Linux (gcc-2.95.2, newlib-1.8.2, binutils-2.9) for compiling my C code.I want to use two
> interrupts (receive and transmit).In FAQ it says that gcc doesnt support writing interrupt handler.
> 
> What i have done is ..
> 
> i put the receive function (the one i want to call by an interrupt) in to a vector table, then i compile my main program and vector table saperately
> and then make an *.out file by linking with ldscript.
> But i doestn work. Can any one please give my some hints how to do that
> 
> do i need to do any changes in my crt0.S file  ?
> 
> thanx in advance
> syed
> 
> =======================================================
> vector table "vect.c"
> =============================================
> #include "ioh83067.h"
> extern void start(void);
> void empty(void) { }
> void my_interrupt (void)
> {
> }
> 
> typedef void  (*irq_func)(void);
> irq_func _vectors[92] __attribute__ ((section (".vectors"))) = {
> start, /* 0 */
> empty,/* 1 */
> empty,/* 84 - ERI1 */
> receive,/* 85 - RXI1 */
> empty,/* 86 - TXI1 */
> };
> 
> =================================================
> main.c
> ================================================
> #include "ioh83067.h"
> #include "vect.c"
> main
> {
> }

-- 
*******************************************
*   Russell Shaw, B.Eng, M.Eng(Research)  *
*      email: russell@webaxs.net          *
*      Victoria, Australia                *
*******************************************

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