vicinit.c

基于飞利浦公司ARM7处理器

/*************************************************************************
 *
 *    Used with ICCARM and AARM.
 *
 *    (c) Copyright IAR Systems 2003
 *
 *    File name   : LPC_Vic.h
 *    Description : Define API for VIC
 *
 *    $Revision: 1.1.6.1 $
 **************************************************************************/

#include "config.h"

/***************************************************************************
 **
 **  VIC Interrupt channels
 **
 ***************************************************************************/
#define VIC_WDT          0  /* Watchdog                           */
#define VIC_SW           1  /* Software interrupts                */
#define VIC_DEBUGRX      2  /* Embedded ICE, DbgCommRx            */
#define VIC_DEBUGTX      3  /* Embedded ICE, DbgCommTx            */
#define VIC_TIMER0       4  /* Timer 0 (Match 0-3 Capture 0-3)    */
#define VIC_TIMER1       5  /* Timer 1 (Match 0-3 Capture 0-3)    */
#define VIC_UART0        6  /* UART 0  (RLS, THRE, RDA, CTI)      */
#define VIC_UART1        7  /* UART 1  (RLS, THRE, RDA, CTI, MSI) */
#define VIC_PWM0         8  /* PWM 0   (Match 0-6 Capture 0-3)    */
#define VIC_I2C          9  /* I2C 0   (SI)                       */
#define VIC_SPI         10  /* SPI 0   (SPIF, MODF)               */
#define VIC_SSP         11  /* SSP                                */
#define VIC_PLL         12  /* PLL lock (PLOCK)                   */
#define VIC_RTC         13  /* RTC      (RTCCIF, RTCALF)          */
#define VIC_EINT0       14  /* External interrupt 0 (EINT0)       */
#define VIC_EINT1       15  /* External interrupt 1 (EINT1)       */
#define VIC_EINT2       16  /* External interrupt 2 (EINT2)       */
#define VIC_EINT3       17  /* External interrupt 3 (EINT3)       */
#define VIC_AD0         18  /* A/D converter 0                    */
#define VIC_I2C1        19  /* I2C 1                              */
#define VIC_BOD         20  /* Brown out detect                   */
#define VIC_AD1         21  /* A/D converter 1                    */
#define VIC_USB         22  /* USB Low and High priority          */

extern void UART0_ISR(void);
extern void UART1_ISR(void);
extern void TIMER0_ISR(void);
extern void TIMER1_ISR(void);

/*************************************************************************
 * Function Name: NonVectISR
 * Parameters: void
 * Return: void
 *
 * Description: non vectored callback subroutine
 *		
 *************************************************************************/
void NonVectISR(void)
{

}

/*************************************************************************
 * Function Name: VIC_Clear
 * Parameters: void
 * Return: void
 *
 * Description: 
 *
 *************************************************************************/
void VIC_Clear(void)
{
  // Assign all interrupt chanels to IRQ
  VICIntSelect  =  0;
  // Diasable all interrupts
  VICIntEnClr = 0xFFFFFFFF;
  // Clear all software interrutps
  VICSoftIntClear = 0xFFFFFFFF;
  // VIC registers can be accessed in User or privileged mode
  VICProtection = 0;
  // Clear interrupt
  VICVectAddr = 0;
  // Clear address of the Interrupt Service routine (ISR) for non-vectored IRQs.
  VICDefVectAddr = 0;

  // Clear address of the Interrupt Service routine (ISR) for vectored IRQs.
  VICVectAddr0  = 0;
  VICVectAddr1  = 0;
  VICVectAddr2  = 0;
  VICVectAddr3  = 0;
  VICVectAddr4  = 0;
  VICVectAddr5  = 0;
  VICVectAddr6  = 0;
  VICVectAddr7  = 0;
  VICVectAddr8  = 0;
  VICVectAddr9  = 0;
  VICVectAddr10 = 0;
  VICVectAddr11 = 0;
  VICVectAddr12 = 0;
  VICVectAddr13 = 0;
  VICVectAddr14 = 0;
  VICVectAddr15 = 0;

  // Disable all vectored IRQ slots
  VICVectCntl0  = 0;
  VICVectCntl1  = 0;
  VICVectCntl2  = 0;
  VICVectCntl3  = 0;
  VICVectCntl4  = 0;
  VICVectCntl5  = 0;
  VICVectCntl6  = 0;
  VICVectCntl7  = 0;
  VICVectCntl8  = 0;
  VICVectCntl9  = 0;
  VICVectCntl10 = 0;
  VICVectCntl11 = 0;
  VICVectCntl12 = 0;
  VICVectCntl13 = 0;
  VICVectCntl14 = 0;
  VICVectCntl15 = 0;
}

/*************************************************************************
 * Function Name: VIC_Init
 * Parameters: void
 * Return: void
 *
 * Description: Initialize VIC
 *
 *************************************************************************/
void VIC_Init(void)
{
	VIC_Clear();
	// Enable interrupts non vectored interrupts
  	VICDefVectAddr = (uint32)NonVectISR;	// 设置非向量中断服务程序地址
  	
  	VICIntSelect = 0x00;				// 所有中断通道设置为IRQ中断
  	// UART0 interrupt
  	VICVectCntl0 = 0x20 | VIC_UART0;	// 设置串口0中断通道分配
	VICVectAddr0 = (uint32)UART0_ISR;	// 设置中断服务程序地址
	VICIntEnable = 1 << VIC_UART0;		// 使能串口0中断
	// UART1 interrupt
	VICVectCntl1 = 0x20 | VIC_UART1;	// 设置串口1中断通道分配
	VICVectAddr1 = (uint32)UART1_ISR;	// 设置中断服务程序地址
	VICIntEnable = 1 << VIC_UART1;		// 使能串口1中断
	// Timer0 interrupt	
	VICVectCntl2 = 0x20 | VIC_TIMER0;	// 设置定时器0中断通道分配
	VICVectAddr2 = (uint32)TIMER0_ISR;	// 设置中断服务程序地址
	VICIntEnable = 1 << VIC_TIMER0;		// 使能定时器0中断
	// Timer1 interrupt
	VICVectCntl3 = 0x20 | VIC_TIMER1;	// 设置定时器1中断通道分配
	VICVectAddr3 = (uint32)TIMER1_ISR;	// 设置中断服务程序地址
	VICIntEnable = 1 << VIC_TIMER1;		// 使能定时器1中断
	
	IRQEnable();		// IRQ中断使能
}