isr.c

FS4510开发板示例程序demo4 压缩包内含FS4510开发板LCD驱动程序与定时器程序 文件说明 demo4.apj 为 SDT2.51 的项目文件 init.s 为初始化文件

/*************************************************************************/
/*                                                                       */
/* FILE NAME                                      VERSION                */
/*                                                                       */
/*      isr.c                      KS32C5000, KS32C50100   : version 1.0 */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*                                                                       */
/* DATA STRUCTURES                                                       */
/*                                                                       */
/*                                                                       */
/* FUNCTIONS                                                             */
/*                                                                       */
/*      Interrupt handler                                                */
/*                                                                       */
/* DEPENDENCIES                                                          */
/*                                                                       */
/*                                                                       */
/* HISTORY                                                               */
/*                                                                       */
/*         NAME            DATE                    REMARKS               */
/*                                                                       */
/*      hbahn           09-15-1998      Created initial version 1.0      */
/*      in4maker        12-18-1998      Some functions added & updated   */
/*************************************************************************/

#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "include\snds.h"
#include "include\isr.h"
#include "include\sysconf.h"

//volatile U32  IntOffSet;

U32  IntOffSet;
/***************************************************************/
/* Dummy Function Prototype for Interrupt Service Vector Table */
/***************************************************************/
static void DummyIsr(void) {}

void (*InterruptHandlers[MAXHNDLRS])(void);

void ClrIntStatus(void)
{
    INTMASK = 0x3fffff;  // All interrupt disabled include global bit
    INTPEND = 0x1fffff;  // All clear pending
    INTMODE = 0x0;  // All FIQ mode

    /* 
     * Interrupt Priority Reset value. Need to be changed priority,
     * Set interrupt priority register. In this case, Global interrupt
     * mask bit must be disabled.
     *
     */ 
    //INTPRI0 = 0x03020100;  
    //INTPRI1 = 0x07060504;
    //INTPRI2 = 0x0b0a0908;
    //INTPRI3 = 0x0f0e0d0c;
    //INTPRI4 = 0x13121110;
    //INTPRI5 = 0x00000014;
    //INTOFFSET =  Read Only Register
}


/******************************************/
/****    Exception Handler Function    ****/
/******************************************/
void	ISR_UndefHandler(REG32 *adr)
{
	//Print("\n** Trap : Undefined Handler\n") ;
}

void	ISR_PrefetchHandler(REG32 *adr)
{
	//Print("\n** Trap : Prefetch Abort Handler\n") ;
}

void	ISR_AbortHandler(REG32 *adr)
{
	//Print("\n** Trap : Data Abort Handler\n") ;
}

void	ISR_SwiHandler(void)
{

}


void	ISR_IrqHandler(void)
{
        IntOffSet = (U32)INTOFFSET;
        Clear_PendingBit(IntOffSet>>2);
       (*InterruptHandlers[IntOffSet>>2])(); // Call interrupt service routine
}


void	ISR_FiqHandler(void)
{
       IntOffSet = (U32)INTOFFSET;
       Clear_PendingBit(IntOffSet>>2) ;
       (*InterruptHandlers[IntOffSet>>2])(); // Call interrupt service routine
}


/***********************************************************************/
/* InitIntHandlerTable: Initialize the interrupt handler table         */
/*     NOTE(S): This should be called during system initialization     */
/***********************************************************************/
void InitIntHandlerTable(void)
{
	REG32 i;
 
	for (i = 0; i < MAXHNDLRS; i++)
    		InterruptHandlers[i] = DummyIsr;
}

/*********************************************************/
/* SysSetInterrupt: Setup Interrupt Handler Vector Table */
/*********************************************************/
void SysSetInterrupt(REG32 vector, void (*handler)())
{
	InterruptHandlers[vector] = handler;

}

/*********************************************************/
/* InitInterrupt: Initialize Interrupt		 */
/*********************************************************/
void InitInterrupt(void) 
{
        ClrIntStatus();         // Clear All interrupt 
	InitIntHandlerTable() ;
}