各位大侠：小弟愚钝，按照网上许多大侠的建议，小弟仍然没有调通裸机下的中断实验。小弟利用的H-JTAG，将代码下载到0x30000000处，以NorFlash方式启动，小弟将源代码奉上：
//中断方式实现键盘扫描
#include <stdlib.h>
#include <string.h>
#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h"
#include "mmu.h"
//================================
#define LED1 (1<<5)
#define LED2 (1<<6)
#define LED3 (1<<7)
#define LED4 (1<<8)
#define KEY1 (1<<0)
#define KEY2 (1<<3)
#define KEY3 (1<<5)
#define KEY4 (1<<6)
void dely(U32 tt)
{
U32 i;
for(;tt>0;tt--)
{
for(i=0;i<10000;i++){}
}
}
void LightLED(void)
{
if(!(rGPGDAT & KEY1))
rGPBDAT = rGPBDAT & ~LED1;
if(!(rGPGDAT & KEY2))
rGPBDAT = rGPBDAT & ~LED2;
if(!(rGPGDAT & KEY3))
rGPBDAT = rGPBDAT & ~LED3;
if(!(rGPGDAT & KEY4))
rGPBDAT = rGPBDAT & ~LED4;
dely(500);
rGPBDAT = 0xfff;
}
void __irq EINT_8_11_13_14(void)
{
if(rEINTPEND &(1<<8))
{
rEINTPEND = (1<<8); //CLEAR rEINTPEND
ClearPending(BIT_EINT8_23);
LightLED();
}
if(rEINTPEND &(1<<11))
{
rEINTPEND = (1<<11); //CLEAR rEINTPEND
ClearPending(BIT_EINT8_23);
LightLED();
}
if(rEINTPEND &(1<<13))
{
rEINTPEND = (1<<13); //CLEAR rEINTPEND
ClearPending(BIT_EINT8_23);
LightLED();
}
if(rEINTPEND &(1<<14))
{
rEINTPEND = (1<<14); //CLEAR rEINTPEND
ClearPending(BIT_EINT8_23);
LightLED();
}
else
{
rEINTPEND = 0xffffff; //CLEAR rEINTPEND
ClearPending(BIT_EINT8_23);
}
}
void EINT_Init(void)
{
rINTMSK=0xFFFFFFDF;//enable EINT8_23
rEXTINT1 = 0x22202002;
rEXTINT2 = 0x2000;
rEINTMASK = 0xF716FF;//enable EINT8,EINT11,EINT13,EINT14
rINTMOD = 0x0;
//我这里的按键接口是
// k1-GPG0
// k2-GPG3
// k3-GPG5
// k4-GPG6
pISR_EINT8_23 = (unsigned int) EINT_8_11_13_14;
}
int Main(int argc, char **argv)
{
int i;
U8 key;
U32 mpll_val=0;
int data;
mpll_val = (92<<12)|(1<<4)|(1);
//init FCLK=400M, so change MPLL first
ChangeMPllValue((mpll_val>>12)&0xff, (mpll_val>>4)&0x3f, mpll_val&3);
ChangeClockDivider(key, 12);
MMU_Init();
rGPBCON = 0x015550;
rGPBUP = 0xfff;
rGPBDAT = 0xfff;
rGPGCON = 0x2822;//0000 0000 0000 0000 0010 1000 0010 0010 //set function as interupt
EINT_Init();
while(1);
return 0;
}
如今打开了MMU，并将MMU.c函数中的MMU-SetMTT(0x00000000,0x03f00000,(int)__ENTRY,RW_CB)代码的(int)__ENTRY改成了0x30000000,同时在主函数中调用MMU_Init();,可执行时程序在mov r1,r1,asr #20处跑飞，请各位大侠指教！
