请教LPC210X系列，FIQ如何使用？

只看该作者 · 2009-10-25 22:42

我用IAR软件

哪位大侠说一下FIQ使用的流程！

#include "iolpc2103.h"
#include <intrinsics.h>
#include <stdio.h>
#define VPBDIV       (*((volatile unsigned char *) 0xE01FC100))
#define IOPIN          (*((volatile unsigned long *) 0xE0028000))

#define Fosc 11059200    //外部晶振频率 11.0592M
#define Fcclk (Fosc * 4) //处理器时钟 Fosc * 4
#define Fpclk (Fcclk / 4) * 1 //VPB时钏频率
#define Fcco (Fcclk * 4) //PLL的操作频
#define LED1 1 << 17
#define LED2 1 << 18
#define LED3 1 << 19
#define LED4 1 << 20

__fiq __arm void fiq_handler(void)
{
  IOCLR = LED1|LED2|LED3|LED4;
}

void PLL_Init()
{
  /* 设置系统各部分时钟 */
  PLLCON = 1; //使能PLL￡但不连接 PLLCON.E = 1,PLLCON.C = 0

  if ((Fpclk / (Fcclk / 4)) == 1)
VPBDIV = 0;          // VPBDIV = 0,则Fpclk = 1/4 Fcclk (复位值)
  if ((Fpclk / (Fcclk / 4)) == 2)
VPBDIV = 2;       //VPBDIV = 2,则Fpclk = 1/2 Fcclk
  if ((Fpclk / (Fcclk / 4)) == 4)
VPBDIV = 1;       //VPBDIV = 1,则Fpclk = Fcclk;
  if ((Fcco / Fcclk) == 2)
PLLCFG = ((Fcclk / Fosc) - 1) | (0 << 5);
  if ((Fcco / Fcclk) == 4)
PLLCFG = ((Fcclk / Fosc) - 1) | (1 << 5);
  if ((Fcco / Fcclk) == 8)
PLLCFG = ((Fcclk / Fosc) - 1) | (2 << 5);
  if ((Fcco / Fcclk) == 16)
PLLCFG = ((Fcclk / Fosc) - 1) | (3 << 5);

  PLLFEED = 0xaa;
  PLLFEED = 0x55;
  while((PLLSTAT & (1 << 10)) == 0);
  PLLCON = 3;
  PLLFEED = 0xaa;
  PLLFEED = 0x55;
}
void GPIO_Init()
{
  PINSEL0 = 0x00000000;
  PINSEL1 = 0x00000000;    //设置P0.16为EINT0

  IODIR = LED1|LED2|LED3|LED4;
  IOSET = LED1|LED2|LED3|LED4;
}

void VIC_Init()
{
  VICIntEnClear = 0xffffffff; //中断全部使能关闭
  VICSoftIntClear = 0xffffffff; //清除软件中断
  VICProtection  = 0;    //清除VIC保护
  VICVectAddr = 0;          //清除向量IRQ中断服务程序地址
  VICDefVectAddr = 0;       //清除非向量IRQ中断服务程序地址


  //清除所有向量IRQ地址
  VICVectAddr0 = VICVectAddr1 = VICVectAddr2 = VICVectAddr3 = \
  VICVectAddr4 = VICVectAddr5 = VICVectAddr6 = VICVectAddr7 = \
  VICVectAddr8 = VICVectAddr9 = VICVectAddr10 = VICVectAddr11 = \
  VICVectAddr12 = VICVectAddr13 = VICVectAddr14 = VICVectAddr15 = 0;

  VICVectCntl0 = VICVectCntl1 = VICVectCntl2 = VICVectCntl3 = \
  VICVectCntl4 = VICVectCntl5 = VICVectCntl6 = VICVectCntl7 = \
  VICVectCntl8 = VICVectCntl9 = VICVectCntl10 = VICVectCntl11 = \
  VICVectCntl12 = VICVectCntl13 = VICVectCntl14 = VICVectCntl15 = 0;
}
void EINT0_Init()
{
PINSEL1 = PINSEL1 | 0x01;  //设轩P0.16连接到EINT0

VICIntSelect = 1<<14; //选择EINT0 为FIQ中断
VICIntEnable = 1<<14;

EXTMODE = 0x00;       //使用电平触发
EXTPOLAR = 0x00;    //低或下降沿
EXTINT = 0x01;
}

void main(void)
{
  //PLL_Init();
  GPIO_Init();
__disable_interrupt();
  VIC_Init();
  EINT0_Init();
  __enable_interrupt();


  while(1)
{
};
}

设置P0.16为EINT0，低电平触发，接是按键，调试的时候怎么都进不了中断？

只看该作者 · 2009-10-26 10:08

哪位大侠知道啊?

请教LPC210X系列，FIQ如何使用？

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