2440zlg7290.c

arm9 s3c2440与zlg7290的接口程序。在 ADS1.2下通过编译并能运行。

#include <string.h>
#include "2440addr.h"
#include "2440lib.h"
#include "def.h"
#include "2440ZLG7290.h"

static U8 _iicData[IICBUFSIZE];
static volatile int _iicDataCount;
static volatile int _iicStatus;
static volatile int _iicMode;
static int _iicPt;
 U8 keypress; 

//===================================================================
//       SMDK2410 IIC configuration
//  GPE15=IICSDA, GPE14=IICSCL
//  "Interrupt mode" for IIC block
//=================================================================== 

//******************[ Test_Iic ]**************************************
void ZLG7290_IIC_Init(void)
{
       
      
       rGPECON &= ~0xf0000000;
       rGPECON |= 0xa0000000;               //GPE15:IICSDA , GPE14:IICSCL 
     
       ClearPending( BIT_IIC);
      	rINTMSK &=~( BIT_IIC); 

       pISR_IIC = (unsigned)IicInt;
       rIICCON = (1<<7) | (1<<6) | (1<<5) | (0xf);
       rIICADD  = 0x10;                    //2440 slave address = [7:1]
       rIICSTAT = 0x10;                    //IIC bus data output enable(Rx/Tx)
}
void  GetKey_ZLG7290(void)
{
	U8 key,repeatcount;
	key=RdZLG7290(ZLG7290_SlaveADDR, ZLG7290_Key);
	repeatcount=RdZLG7290(ZLG7290_SlaveADDR, ZLG7290_RepeatCnt);
	Uart_Printf(" THE KEY is: ");
	Uart_SendByte(key/10+0x30);
	Uart_SendByte(key%10+0x30);
	Uart_Printf(" THE repeatcount is: ");
	Uart_SendByte(repeatcount/100+0x30);
	Uart_SendByte(repeatcount/10-repeatcount/100*10+0x30);
	Uart_SendByte(repeatcount%10+0x30);
	Uart_Printf("\n");
	Uart_Printf("\n");
}
/*void TestIIC(void)
{
   
	while(1)
	{
    	rIICDS   = 0x70;
    	Delay(1);
    	rIICSTAT = 0xf0;                    //MasTx,Start  
    	Delay(5);
    	rIICSTAT      = 0xd0;               //MasRx,stop
    	rIICCON       = 0xaf;               //Resumes IIC operation.
    	Delay(1);
	 }
}
*/
//*************************[ Wr24C080 ]****************************
void WrZLG7290(U32 slvAddr,U32 addr,U8 data)
{
    _iicMode      = WRDATA;
    _iicPt        = 0;
    _iicData[0]   = (U8)addr;
    _iicData[1]   = data;
    _iicDataCount = 2;
    
    rIICDS   = slvAddr;                 //0xa0
    rIICSTAT = 0xf0;                    //MasTx,Start
      //Clearing the pending bit isn't needed because the pending bit has been cleared.
    while(_iicDataCount!=-1);
 	
 	rIICSTAT = 0xd0;                    //Stop MasTx condition 
    rIICCON  = 0xaf;                    //Resumes IIC operation. 

    rIICSTAT = 0xd0;                    //Stop MasTx condition 
    rIICCON  = 0xaf;                    //Resumes IIC operation. 
    Delay(1);                           //Wait until stop condtion is in effect.
       //Write is completed.
}
        
//**********************[ Rd24C080 ] ***********************************
U8 RdZLG7290(U32 slvAddr,U32 addr)
{
    _iicMode      = SETRDADDR;
    _iicPt        = 0;
    _iicData[0]   = (U8)addr;
    _iicDataCount = 1;

    rIICDS   = slvAddr;
    rIICSTAT = 0xf0;                    //MasTx,Start  
    //Clearing the pending bit isn't needed because the pending bit has been cleared.
   while(_iicDataCount!=-1);

    _iicMode      = RDDATA;
    _iicPt        = 0;
    _iicDataCount = 1;
    
    rIICDS        = slvAddr;
    rIICSTAT      = 0xb0;               //MasRx,Start
    rIICCON       = 0xaf;               //Resumes IIC operation.   
    while(_iicDataCount!=-1);

    return _iicData[1];
}

//-------------------------------------------------------------------------
void __irq KeyScan(void)
{
	 if(rINTPND==BIT_EINT8_23)  
		{ 
			ClearPending(BIT_EINT8_23);
			if(rEINTPEND&(1<<9))  
				{ 
 					Uart_Printf("KEY PRESSED:    ");
 					 rEINTPEND |= 1<<9; 
 					 keypress=1; 
 				} 
		} 
	 
}
void __irq IicInt(void)
{
    U32 iicSt,i;
    
    rSRCPND = BIT_IIC;          //Clear pending bit
    rINTPND = 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){}           //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;    
            }
            rIICDS = _iicData[_iicPt++];        //_iicData[0] has dummy.
            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;      
    }
}