自己写的44b0的IIC程序，但不成功，望高手指点

只看该作者 · 2008-2-19 23:11

到井号那里就无法再执行下去了，仿佛是在中断里出不来了，请高手帮忙看一看啊，小弟急啊！！！！

#include "option.h"
#include "def.h"
#include "44b.h"
#include "44blib.h"

#define WRDATA        (1)
#define RDDATA        (2)
#define SETRDADDR        (3)

void Isr_Init(void);
void HaltUndef(void);
void HaltSwi(void);
void HaltPabort(void);
void HaltDabort(void);
void Wr24C040(U32 slvAddr,U32 addr,U8 data);
void Rd24C040(U32 slvAddr,U32 addr,U8 *data);
void __irq IicInt(void);
volatile int _iicDataCount;
volatile int _iicMode;
U8 _iicaddr;
U8 _iicdata;

void Main(void)
{
    unsigned int i;
    U8 data[256];

    rSYSCFG=SYSCFG_8KB;
#if (PLLON==1)
    ChangePllValue(PLL_M,PLL_P,PLL_S);
#endif

    Isr_Init();
    Port_Init();
    Uart_Init(0,115200);
    Uart_Select(0);
    Delay(0);  //calibrate Delay()
    Led_Display(7);
    Delay(1000);  //calibrate Delay()
    Led_Display(0);
    Delay(5000);  //calibrate Delay()
    Led_Display(7);
    Uart_Printf(" start ");

    pISR_IIC=(unsigned)IicInt;
    rINTMSK=~(BIT_GLOBAL|BIT_IIC);
    rIICCON=0xaf;
    rIICSTAT=0x10;
    rIICADD=0x10;

    Uart_Printf("Write test data into KS24C080 ");

    for(i=0;i<16;i++)
    Wr24C040(0xa0,(U8)i,i);

    for(i=0;i<16;i++)
         data=0;


    Uart_Printf("Read test data from KS24C080 ");

    for(i=0;i<16;i++)
    Rd24C040(0xa0,(U8)i,&(data));

    for(i=0;i<16;i++)
    {
    Uart_Printf("%2x ",data);
    Uart_Printf(" ");
    }

}

void Wr24C040(U32 slvAddr,U32 addr,U8 data)
{
    _iicMode=WRDATA;
    _iicaddr=addr;
    _iicdata=data;
    _iicDataCount=3;
    rIICDS=slvAddr;
    rIICSTAT=0xf0;
############################################################
    Uart_Printf(" test1 ");
    while(_iicDataCount!=-1);

}

void Rd24C040(U32 slvAddr,U32 addr,U8 *data)
{
    _iicMode=SETRDADDR;
    _iicaddr=addr;
    _iicDataCount=2;
    rIICDS=slvAddr;
    rIICSTAT=0xf0;
    while(_iicDataCount!=0);
    _iicMode=RDDATA;
    _iicDataCount=2;
    rIICDS=slvAddr;
    rIICSTAT=0xb0; //MasRx,Start
    rIICCON=0xaf;  //resumes IIC operation.
    while(_iicDataCount!=0);
    *data=_iicdata;
}

void __irq IicInt(void)
{
    U32 i;

  switch(_iicMode)
{
   case WRDATA:
    if(_iicDataCount==1)
   {
    _iicDataCount--;
    Uart_Printf("_iicDataCount3=%d ",_iicDataCount);
    rIICSTAT=0xd0;
    rIICCON=0xaf;
    Delay(1);
   }
    else if(_iicDataCount==2)
   {
    _iicDataCount--;
    Uart_Printf("_iicDataCount2=%d ",_iicDataCount);
    rIICDS=_iicdata;
    for(i=0;i<10;i++);
    rIICCON=0xaf;
   }
    else if(_iicDataCount==3)
   {
    _iicDataCount--;
    Uart_Printf("_iicDataCount1=%d ",_iicDataCount);
    rIICDS=_iicaddr;
    for(i=0;i<10;i++);
    rIICCON=0xaf;
   }
   break;


   case SETRDADDR:
    if(_iicDataCount==2)
   {
    _iicDataCount--;
    rIICDS=_iicaddr;
    for(i=0;i<10;i++);
    rIICCON=0xaf;
   }
    else
   {
    _iicDataCount--;
   }
    break;

  case RDDATA:
    if(_iicDataCount==2)
   {
    _iicDataCount--;
    _iicdata=rIICDS;
    for(i=0;i<10;i++);
    rIICCON=0x2f;//resumes IIC operation with NOACK.
   }
    else
   {
    _iicDataCount--;
    rIICSTAT=0x90;  //stop MasRx condition
    rIICCON=0xaf;   //resumes IIC operation.
    Delay(1);      //wait until stop condtion is in effect.
               //too long time...

   }
    break;


   default:
    break;
}

}

void Isr_Init(void)
{
    U32 i;

    pISR_UNDEF=(unsigned)HaltUndef;
    pISR_SWI  =(unsigned)HaltSwi;
    pISR_PABORT=(unsigned)HaltPabort;
    pISR_DABORT=(unsigned)HaltDabort;

     for(i=_RAM_STARTADDRESS;i<(_RAM_STARTADDRESS+0x20);i+=4)
    {
    *((volatile unsigned *)i)=0xEA000000+0x1FFE;
    }

    rINTCON=0x5;      // Non-vectored,IRQ enable,FIQ disable

    rINTMOD=0x0;      // All=IRQ mode
    rINTMSK|=BIT_GLOBAL|BIT_EINT3;      // All interrupt is masked.
}

void HaltUndef(void)
{
    Uart_Printf("Undefined instruction exception!!! ");
    while(1);
}

void HaltSwi(void)
{
    Uart_Printf("SWI exception!!! ");
    while(1);
}

void HaltPabort(void)
{
    Uart_Printf("Pabort exception!!! ");
    while(1);
}

void HaltDabort(void)
{
    Uart_Printf("Dabort exception!!! ");
    while(1);