main.c

嵌入式arm7平台s3c44b0数码管显示实验

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

#define WRDATA	    (1)
#define POLLACK     (2)
#define RDDATA	    (3)
#define SETRDADDR   (4)

#define IICBUFSIZE 0x20

void Isr_Init(void);
void HaltUndef(void);
void HaltSwi(void);
void HaltPabort(void);      
void HaltDabort(void);
void Rd24C040(U32 slvAddr,U32 addr,U8 *data);
void Wr24C040(U32 slvAddr,U32 addr,U8 data);

#define  ZLG7290 	0x70 
unsigned char ZLG7290_SendCmd(unsigned char Data1,unsigned char Data2);
unsigned char ZLG7290_SendStr(unsigned char sla, unsigned char suba, unsigned char *s, unsigned char no);
void ZLG7290_SendBuf(unsigned char * disp_buf,unsigned char num);
void  DelayNS(U32  dly);

U8 _iicData[IICBUFSIZE];
volatile int _iicDataCount;
volatile int _iicStatus;
volatile int _iicMode;
volatile int _iicsuba;
volatile int _iicsuba_en; 
int _iicPt;

void __irq IicInt(void);

void Main(void)
{
    unsigned int i;
    static U8  disp_buf[9];
    

    char aa;
    rSYSCFG=SYSCFG_8KB;


    Isr_Init();
    Port_Init();
    Uart_Init(0,115200);
    Uart_Select(0);
    Delay(1);
    Uart_Printf("\n*                            北京三恒星科技                                *");
    Uart_Printf("\n*                     -S3C44B0X功能部件:数码管实验测试-                    *");  
	Uart_Printf("\n*             UART Config--COM:115.2kbps,8Bit,NP,UART0                     *");
	Uart_Printf("\n*                           www.sanhengxing.com                            *");
	Uart_Printf("\n*------------------Begin to Start 数码管实验测试,OK? (Y/N)-----------------*");
	Uart_Printf("\n");
    aa= Uart_Getch();
	if((aa=='Y')||(aa=='y'))    

    Uart_Printf("[IIC Test using ZLG7290]\n");

    pISR_IIC=(unsigned)IicInt;//中断入口函数说明
    rINTMSK=~(BIT_GLOBAL|BIT_IIC);//去屏蔽中断

    rIICCON=(1<<7)|(0<<6)|(1<<5)|(0xf);
    //Enable interrupt, IICCLK=MCLK/16, Enable ACK
    //40Mhz/16/(15+1) = 257Khz	
    rIICADD=0x10;   // S3C44B0X slave address  ？

    rIICSTAT=0x10;//?

   
    Uart_Printf("TESTING IS STARTING\n");
        
   for(i=0; i<=8; i++) 
   disp_buf[i] = 0xC8;
   ZLG7290_SendBuf(disp_buf,9);
   DelayNS(150);
   
   /* 显示"8 7 6 5 4 3 2 1" */
   for(i=0; i<=8; i++) 
   disp_buf[i] = i+1;
   ZLG7290_SendBuf(disp_buf,9);
   DelayNS(150);
   
}


//传送数码管字符编码
void ZLG7290_SendBuf(unsigned char * disp_buf,unsigned char num)
{
	unsigned char i;
	for(i=0;i<num;i++)
	{	
		ZLG7290_SendCmd(0x60+i,*disp_buf);
		disp_buf++;
		
	}
}

unsigned char ZLG7290_SendCmd(unsigned char Data1,unsigned char Data2)
{
    unsigned char Data[2];
    Data[0]=Data1;
	Data[1]=Data2;
	ZLG7290_SendStr(ZLG7290,0x07,Data,2);
	DelayNS(500);
	return 1;
} 


void  DelayNS(U32  dly)
{  U32  i;
   for(; dly>0; dly--)
        for(i=0; i<5000; i++);
}

  
unsigned char ZLG7290_SendStr(unsigned char sla, unsigned char suba, unsigned char *s, unsigned char no)
{   
    _iicMode=WRDATA;
    _iicPt=0;
    _iicData[0]=(U8)s[0];
    _iicData[1]=s[1];
    _iicsuba=suba;
    _iicsuba_en=2;
    _iicDataCount=3;
       
    rIICDS=sla;//slvAddr;//0xa0
    rIICSTAT=0xf0;
    //Clearing the pending bit isn't needed because the pending bit has been cleared.
    while(_iicDataCount!=-1);
    
}

  


/*****************************************************************/
void __irq IicInt(void)
{
    U32 iicSt,i;
    rI_ISPC=BIT_IIC;
    iicSt=rIICSTAT; 
    if(iicSt&0x8){} // when bus arbitration is failed.
    if(iicSt&0x4){} // when a slave address is matched with IICADD
    if(iicSt&0x2){} // when a slave address is 0000000b
    if(iicSt&0x1){ while(1) {iicSt=rIICSTAT;
                             if(iicSt&0x1==0) break;
                             }
                  } // when ACK isn't received
    
    switch(_iicMode)
    {
	case POLLACK:
	    _iicStatus=iicSt;
	   
	    break;

	case RDDATA:
	    if((_iicDataCount--)==0)
	    {
		_iicData[_iicPt++]=rIICDS;
	    
		rIICSTAT=0x90;  //stop MasRx condition 
		rIICCON=0xaf;   //resumes IIC operation.
		Delay(1);	//wait until stop condtion is in effect.
				//too long time... 
		//The pending bit will not be set after issuing stop condition.
		break;    
	    }	     
	    _iicData[_iicPt++]=rIICDS;
				//The last data has to be read with no ack.
	    if((_iicDataCount)==0)
		rIICCON=0x2f;	//resumes IIC operation with NOACK.  
	    else 
		rIICCON=0xaf;	//resumes IIC operation with ACK
	    break;

	case WRDATA:
	    if((_iicDataCount--)==0)
	    {
		rIICSTAT=0xd0;	//stop MasTx condition 
		rIICCON=0xaf;	//resumes IIC operation.
		Delay(1);	//wait until stop condtion is in effect.
		//The pending bit will not be set after issuing stop condition.
		break;    
	    }
	    else {if (_iicsuba_en==2)    
	            {rIICDS=_iicsuba;
	             for(i=0;i<10;i++);	    //for setup time until rising edge of IICSCL
	             rIICCON=0xaf;	    //resumes IIC operation.
	             _iicsuba_en=0;
	             break;
	             }
	           else  {rIICDS=_iicData[_iicPt++];  
	                  for(i=0;i<10;i++);	    //for setup time until rising edge of IICSCL
	                  rIICCON=0xaf;	    //resumes IIC operation.
	                  
	                 }
	          }
	   break; 

	case SETRDADDR:
	    //Uart_Printf("[S%d]",_iicDataCount);
	    if((_iicDataCount--)==0)
	    {
		break;  //IIC operation is stopped because of IICCON[4]    
	    }
	    rIICDS=_iicData[_iicPt++];
	    for(i=0;i<10;i++);  //for setup time until rising edge of IICSCL
	    rIICCON=0xaf;	    //resumes IIC operation.
	    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!!!\n");
    while(1);
}

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

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

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