external interrupt st72F521

[matthieulafferriere]

Posted on September 04, 2006 at 07:22

external interrupt st72F521

[matthieulafferriere]

Posted on June 22, 2006 at 07:56

I have got a problem with the interrupt.

I configure the register for an external interrupt on portB pin6 on rising edge.

The interrupt never launch.

Someone have an idea?

/* Example code for ITC for ST72F521 */

#include ''ST7lib_config.h''

//prototype declarations

void EI3_IT_Routine(void);

void main(void);

#ifndef NULL

#define NULL (void *)0

#endif

extern void _Startup(); /* startup routine */

extern void EI3_IT_Routine();

#pragma CONST_SEG .myVectorTable

/* Interrupt vector table, to be linked at the address

0xFFE0 (in ROM) */

volatile void (* const _vectab[])() = {

NULL, /* 0xFFE0 */

NULL, /* 0xFFE2 */

NULL, /* 0xFFE4 */

NULL, /* 0xFFE6 */

NULL, /* 0xFFE8 */

NULL, /* 0xFFEA */

NULL, /* 0xFFEC */

NULL, /* 0xFFEE */

EI3_IT_Routine, /* 0xFFF0 */

NULL, /* 0xFFF2 */

NULL, /* 0xFFF4 */

NULL, /* 0xFFF6 */

NULL, /* 0xFFF8 */

NULL, /* 0xFFFA */

NULL, /* 0xFFFC */

_Startup, /* Reset Vector */

};

#pragma DATA_SEG DEFAULT

void main (void)

{

unsigned char Pin = 6;

ITC_LEVEL Priority = IT_LEVEL_2; /*Variable Declaration*/

ITC_Init (); /* Initialise ITC */

EnableInterrupts /*Reset Interrupt mask*/

// ITC_SetPriority (((unsigned char)IT_TIMERA | ((unsigned char)IT_EI0)),

// IT_LEVEL_2);

/* Sets Interrupt Priority FOR EI0 AS LEVEL 2*/

ITC_SetPriority (IT_EI3, IT_LEVEL_0);

/* Sets Interrupt Priority FOR EI2 AS LEVEL 1*/

// Priority = ITC_GetPriority (IT_EI0); /* Gets Priority */

while (!(ITC_Get_CurrentLevel () == IT_LEVEL_0));

/* Checks Current interrupt priority*/

// ITC_ConfigureInterrupt(IT_PortA,Pin, IT_EDGE_F);

/*Set falling edge sensitivity for EI0*/

ITC_ConfigureInterrupt(IT_PortB,Pin, IT_EDGE_R);

/*Set falling edge sensitivity for EI2*/

// ITC_DisableTLI (); /*Disables TLI interrupt */

// ITC_TLISensitivity (IT_EDGE_R); /* Sets Rising edge for TLI */

// ITC_EnableTLI (); /* Enables TLI interrupt */

PCDDR = 0x08;

PCOR = 0x08;

PCDR = 0x00;

}

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

Interrupt Subroutine for EI2

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

#ifdef _HIWARE_ /* Test for HIWARE Compiler */

#pragma TRAP_PROC SAVE_REGS /* Additional registers will be saved */

#else

#ifdef _COSMIC_ /* Test for Cosmic Compiler */

@interrupt /* Cosmic interrupt handling */

#else

#error''Unsupported Compiler!'' /* Compiler Defines not found! */

#endif

#endif

void EI3_IT_Routine (void)

{

unsigned int i;

PCDDR = 0x0C;

PCOR = 0x0C;

PCDR = 0x00;

for (i = 0; i < 50000; i++)

{

Nop

}

PCDR &= 0xFd;

}

[gabriel2399]

Posted on September 04, 2006 at 07:22

Keep your eyes to the port Configuration:

PxDDR = ....

PxOR = ....

The configuration must be Input - Interrupt for the

corresponding Port-Pin ( 0, 1 = DDR, OR) Flag combination