vic.c

SmartARM2400系列开发板全套资料

/****************************************Copyright (c)****************************************************
**                      Guangzhou ZLG-MCU Development Co.,LTD.
**                            graduate school
**                        http://www.zlgmcu.com
**
**--------------File Info------------------------------------------------------
** File Name: VIC.c
** Last modified Date: 2004-10-12
** Last Version: 1.0
** Description: operater IRQ for LPC2xxx
**
**-----------------------------------------------------------------------------
** Created date: 2004-10-12
** Version: 1.0
** Description: operater IRQ for LPC2xxx
**
**-----------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Description:
**
*********************************************************************************************************/
#include "VIC.h"
#include "LPC2400.h"

/*********************************************************************************************************
** Function name: VIC_InstallIRQ
** Descriptions: install IRQ（安装IRQ）
** Input:	nIntSrc: interrupt source, et I2C, PWM（中断源，如I2C、PWM等）
**      	pfnISR：interrupt serve routine（中断服务程序）
**			IntPrio：interrupt priority. The value less, the priority higher
					 （中断优先级，数值越低，优先级越高。）
** Output:	return: TRUE： success（TRUE：成功）
					FALSE: fail（FALSE：失败）
** Created Date: 2004-10-12
*********************************************************************************************************/
BOOL VIC_InstallIRQ(uint8 nIntSrc, PISR pfnISR, uint8 IntPrio)
{
	if (IntPrio > 15) {
	
		return FALSE;
	}
	
	VICIntSelect &= ~(1 << nIntSrc);									/* IRQ 中断，非FIQ中断			*/
	*( &VICVectPri0  + nIntSrc) = IntPrio;
	*(&VICVectAddr0 + nIntSrc) = (uint32) pfnISR;
	
	VICIntEnable = 1 << nIntSrc;										/* 使能中断						*/ 
	
	return TRUE;
}