中断控制LED实验

yuyukaka789 · 发表于 2010-8-21 16:44:11

各位朋友大家好，我自己写了个外部中断控制程序，目的是K1--K4分别控制LED1--LED4，按一下亮，再按一下熄，但K1,K3,K4都没问题，K2却按一下就亮，但再按一下却不会熄，然后再按K1,K3,K4都不会产生中断，令我很费解啊，我只列出核心代码，启动代码没有！
#define _ISR_STARTADDRESS 0x33ffff00
#define U32 unsigned int
#define pISR_EINT0          (*(unsigned *)(_ISR_STARTADDRESS+0x20))
#define pISR_EINT1          (*(unsigned *)(_ISR_STARTADDRESS+0x24))
#define pISR_EINT2          (*(unsigned *)(_ISR_STARTADDRESS+0x28))
#define pISR_EINT4_7  (*(unsigned *)(_ISR_STARTADDRESS+0x30))
#define rSRCPND    (*(volatile unsigned *)0x4a000000)    //Interrupt request status
#define rINTMSK    (*(volatile unsigned *)0x4a000008)    //Interrupt mask control
#define rINTPND    (*(volatile unsigned *)0x4a000010)    //Interrupt request status
#define rGPBCON (*(volatile unsigned *)0x56000010) //Port B control
#define rGPBDAT (*(volatile unsigned *)0x56000014) //Port B data
#define rGPBUP    (*(volatile unsigned *)0x56000018)  //Pull-up control B
#define rGPFCON (*(volatile unsigned *)0x56000050) //Port F control
#define rEXTINT0 (*(volatile unsigned *)0x56000088)
#define rEINTMASK  (*(volatile unsigned *)0x560000a4) //External interrupt mask
#define rEINTPEND  (*(volatile unsigned *)0x560000a8) //External interrupt pending
#include <stdlib.h>
#include <string.h>
#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h"
static U32 cpu_freq;
static U32 UPLL;
static void __irq key1_interrupt(void);
static void __irq key2_interrupt(void);
static void __irq key3_interrupt(void);
static void __irq key4_interrupt(void);
int x=1;
int y=1;
int z=1;
int w=1;
static void cal_cpu_bus_clk(void)
{
U32 val;
U8 m, p, s;

val = rMPLLCON;
m = (val>>12)&0xff;
p = (val>>4)&0x3f;
s = val&3;

//(m+8)*FIN*2 不要超出32位数!
FCLK = ((m+8)*(FIN/100)*2)/((p+2)*(1<<s))*100;

val = rCLKDIVN;
m = (val>>1)&3;
p = val&1;
val = rCAMDIVN;
s = val>>8;

switch (m) {
case 0:
HCLK = FCLK;
break;
case 1:
HCLK = FCLK>>1;
break;
case 2:
if(s&2)
HCLK = FCLK>>3;
else
HCLK = FCLK>>2;
break;
case 3:
if(s&1)
HCLK = FCLK/6;
else
HCLK = FCLK/3;
break;
}

if(p)
PCLK = HCLK>>1;
else
PCLK = HCLK;

if(s&0x10)
cpu_freq = HCLK;
else
cpu_freq = FCLK;

val = rUPLLCON;
m = (val>>12)&0xff;
p = (val>>4)&0x3f;
s = val&3;
UPLL = ((m+8)*FIN)/((p+2)*(1<<s));
UCLK = (rCLKDIVN&8)?(UPLL>>1):UPLL;
}
static void __irq key1_interrupt(void)
{ int led;
  rSRCPND=rSRCPND | 0x01<<1;
  rINTPND=rINTPND | 0x01<<1;
  led =0x01c0;
  if(x!=0)
  {
  rGPBDAT=led;
x=0;
}
  else  {
  rGPBDAT=0x0ff0;
  x=1;    };

}
static void __irq key2_interrupt(void)
{ int led;
  rSRCPND=rSRCPND | 0x01<<4;
  rINTPND=rINTPND | 0x01<<4;
  led=0x01a0;
  if(y!=0)
  {
  rGPBDAT=led;
y=0;
}
  else
  {
  rGPBDAT=0x0ff0;
  y=1;    };
}
static void __irq key3_interrupt(void)
{ int led;
  rSRCPND=rSRCPND | 0x01<<2;
  rINTPND=rINTPND | 0x01<<2;
  led=0x0160;
  if(z!=0)
  {
  rGPBDAT=led;
z=0;
}
  else  {
  rGPBDAT=0x0ff0;
  z=1;    };
}
static void __irq key4_interrupt(void)
{
  int led;
  rSRCPND=rSRCPND | 0x01;
  rINTPND=rINTPND | 0x01;
  led=0x0e0;
  if(w!=0)
  {
  rGPBDAT=led;
w=0;
}
  else  {
  rGPBDAT=0x0ff0;
  w=1;    };
  }
void Main(void)
{
U8 key;
int i;
U32 mpll_val = 0;

Port_Init();

i = 2 ; //don't use 100M!
switch ( i ) {
case 0: //200
key = 12;
mpll_val = (92<<12)|(4<<4)|(1);
break;
case 1: //300
key = 13;
mpll_val = (67<<12)|(1<<4)|(1);
break;
case 2: //400
key = 14;
mpll_val = (92<<12)|(1<<4)|(1);
break;
case 3: //440!!!
key = 14;
mpll_val = (102<<12)|(1<<4)|(1);
break;
default:
key = 14;
mpll_val = (92<<12)|(1<<4)|(1);
break;
}

ChangeMPllValue((mpll_val>>12)&0xff, (mpll_val>>4)&0x3f, mpll_val&3);
ChangeClockDivider(key, 12);
cal_cpu_bus_clk();
rSRCPND = 0x17;
rINTMSK = ~0x17;
rINTPND =0x17;
rEINTPEND = (1<<4);
rEINTMASK = ~(1<<4);
rEXTINT0 = 0x20222;
rGPBDAT=0x1ff;
   while(1)
{
pISR_EINT0  = (U32)key4_interrupt;
pISR_EINT1  = (U32)key1_interrupt;
pISR_EINT2  = (U32)key3_interrupt;
pISR_EINT4_7= (U32)key2_interrupt;
}

}
关键看哈K2的中断，它是由EINT4控制的。