www.pudn.com > s3c2410VGATEST.rar > 2410IIC.c

 
#include  
#include "2410addr.h" 
#include "2410lib.h" 
#include "def.h" 
#include "2410IIC.h" 
 
static U8 _iicData[IICBUFSIZE]; 
static volatile int _iicDataCount; 
static volatile int _iicStatus; 
static volatile int _iicMode; 
static int _iicPt; 
 
//=================================================================== 
//       SMDK2410 IIC configuration 
//  GPE15=IICSDA, GPE14=IICSCL 
//  "Interrupt mode" for IIC block 
//===================================================================  
 
//******************[ Test_Iic ]************************************** 
void Test_Iic(void) 
{ 
    unsigned int i,j,save_E,save_PE; 
    static U8 data[256]; 
 
    Uart_Printf("[ IIC Test(Interrupt) using KS24C080 ]\n"); 
 
    save_E   = rGPECON; 
    save_PE  = rGPEUP; 
    rGPEUP  |= 0xc000;                  //Pull-up disable 
    rGPECON |= 0xa00000;                //GPE15:IICSDA , GPE14:IICSCL  
 
    pISR_IIC = (unsigned)IicInt; 
    rINTMSK &= ~(BIT_IIC); 
 
      //Enable ACK, Prescaler IICCLK=PCLK/16, Enable interrupt, Transmit clock value Tx clock=IICCLK/16 
      // If PCLK 50.7MHz, IICCLK = 3.17MHz, Tx Clock = 0.198MHz 
    rIICCON = (1<<7) | (0<<6) | (1<<5) | (0xf); 
 
    rIICADD  = 0x10;                    //2410 slave address = [7:1] 
    rIICSTAT = 0x10;                    //IIC bus data output enable(Rx/Tx) 
 
    Uart_Printf("Write test data into KS24C080\n"); 
 
    for(i=0;i<256;i++) 
        Wr24C080(0xa0,(U8)i,i); 
            
    for(i=0;i<256;i++) 
        data[i] = 0; 
 
    Uart_Printf("Read test data from KS24C080\n"); 
     
    for(i=0;i<256;i++) 
        Rd24C080(0xa0,(U8)i,&(data[i]));  
 
        //Line changed 0 ~ f 
    for(i=0;i<16;i++) 
    { 
        for(j=0;j<16;j++) 
            Uart_Printf("%2x ",data[i*16+j]); 
        Uart_Printf("\n"); 
    } 
    rINTMSK |= BIT_IIC;     
    rGPEUP  = save_PE; 
    rGPECON = save_E; 
} 
 
 
 
void IicSetCh7004(void) 
{ 
    unsigned int i,j,save_E,save_PE; 
 
    save_E   = rGPECON; 
    save_PE  = rGPEUP; 
    rGPEUP  |= 0xc000;                  //Pull-up disable 
    rGPECON |= 0xa00000;                //GPE15:IICSDA , GPE14:IICSCL  
 
    pISR_IIC = (unsigned)IicInt; 
    rINTMSK &= ~(BIT_IIC); 
 
      //Enable ACK, Prescaler IICCLK=PCLK/16, Enable interrupt, Transmit clock value Tx clock=IICCLK/16 
      // If PCLK 50.7MHz, IICCLK = 3.17MHz, Tx Clock = 0.198MHz 
//    rIICCON = (1<<7) | (0<<6) | (1<<5) | (0xf); 
 
      //Enable ACK, Prescaler IICCLK=PCLK/256, Enable interrupt, Transmit clock value Tx clock=IICCLK/1 
      // If PCLK 50.7MHz, IICCLK = 0.99MHz, Tx Clock = 99KHz 
    rIICCON = (1<<7) | (1<<6) | (1<<5) | (0x0); 
 
 
    rIICADD  = 0x10;                    //2410 slave address = [7:1] 
    rIICSTAT = 0x10;                    //IIC bus data output enable(Rx/Tx) 
 
    Uart_Printf("Write control data into ch7004\n"); 
     
    //CH7004 slave addr[7..1]--0x76     [0]--1  RW 
    WrCh7004(0xec,(U8)0x84,0x20); 
    
 
    //Write is completed. 
    Uart_Printf("Write is completed\n");     
     
    rINTMSK |= BIT_IIC;     
    rGPEUP  = save_PE; 
    rGPECON = save_E; 
     
} 
 
//*************************[ Wr7004 ]**************************** 
void WrCh7004(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); 
 
 
/* 
    _iicMode = POLLACK; 
 
    while(1) 
    { 
        rIICDS     = slvAddr; 
        _iicStatus = 0x100; 
        rIICCON    = 0xe0;              //Resumes IIC operation.  
        rIICSTAT   = 0xf0;              //MasTx,Start 
            
        while(_iicStatus==0x100); 
            
        if(!(_iicStatus&0x1)) 
            break;                      //When ACK is received 
    } 
    rIICSTAT = 0xd0;                    //Stop MasTx condition  
    rIICCON  = 0xe0;                    //Resumes IIC operation.  
    Delay(1);                           //Wait until stop condtion is in effect. 
     
     //Write is completed. 
*/ 
 
 
} 
 
 
 
//*************************[ Wr24C080 ]**************************** 
void Wr24C080(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); 
 
    _iicMode = POLLACK; 
 
    while(1) 
    { 
        rIICDS     = slvAddr; 
        _iicStatus = 0x100; 
        rIICSTAT   = 0xf0;              //MasTx,Start 
        rIICCON    = 0xe0;              //Resumes IIC operation.  
            
        while(_iicStatus==0x100); 
            
        if(!(_iicStatus&0x1)) 
            break;                      //When ACK is received 
    } 
    rIICSTAT = 0xd0;                    //Stop MasTx condition  
    rIICCON  = 0xe0;                    //Resumes IIC operation.  
    Delay(1);                           //Wait until stop condtion is in effect. 
       //Write is completed. 
} 
         
//**********************[ Rd24C080 ] *********************************** 
void Rd24C080(U32 slvAddr,U32 addr,U8 *data) 
{ 
     
    _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       = 0xe0;               //Resumes IIC operation.    
    while(_iicDataCount!=-1); 
 
    *data = _iicData[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  = 0xe0;                 //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 = 0xe0;                  //Resumes IIC operation with ACK 
               break; 
 
        case WRDATA: 
            if((_iicDataCount--)==0) 
            { 
                rIICSTAT = 0xd0;                //Stop MasTx condition  
                rIICCON  = 0xe0;                //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 = 0xe0;                     //resumes IIC operation. 
            break; 
 
        case SETRDADDR: 
//            Uart_Printf("__irq IicInt SETDADDR [ 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 = 0xe0;                     //Resumes IIC operation. 
            break; 
 
        default: 
            break;       
    } 
} 
 
 
//=================================================================== 
//       SMDK2410 IIC configuration 
//  GPE15=IICSDA, GPE14=IICSCL 
//  "Non-Interrupt" mode for IIC block 
//===================================================================  
 
//*********************[ Test_Iic2 ]********************************* 
void Test_Iic2(void) 
{ 
    unsigned int i,j,save_E,save_PE; 
    static U8 data[256]; 
     
    Uart_Printf("[ IIC Test(Polling) using KS24C080 ]\n"); 
 
    save_E   = rGPECON; 
    save_PE  = rGPEUP; 
 
    rGPEUP  |= 0xc000;                  //Pull-up disable 
    rGPECON |= 0xa00000;                //GPE15:IICSDA , GPE14:IICSCL     
 
      //Enable ACK, Prescaler IICCLK=PCLK/16, Enable interrupt, Transmit clock value Tx clock=IICCLK/16 
    rIICCON  = (1<<7) | (0<<6) | (1<<5) | (0xf); 
 
    rIICADD  = 0x10;                    //2410 slave address = [7:1] 
    rIICSTAT = 0x10;                    //IIC bus data output enable(Rx/Tx) 
 
    Uart_Printf("Write test data into KS24C080\n"); 
 
    for(i=0;i<256;i++) 
        _Wr24C080(0xa0,(U8)i,255-i); 
    for(i=0;i<256;i++) 
        data[i] = 0; 
 
    Uart_Printf("Read test data from KS24C080\n"); 
    for(i=0;i<256;i++) 
        _Rd24C080(0xa0,(U8)i,&(data[i]));  
 
    for(i=0;i<16;i++) 
    { 
        for(j=0;j<16;j++) 
            Uart_Printf("%2x ",data[i*16+j]); 
        Uart_Printf("\n"); 
    } 
     
    rGPEUP  = save_PE; 
    rGPECON = save_E; 
} 
 
//**************[ _Wr24C080 ]***************************************** 
void _Wr24C080(U32 slvAddr,U32 addr,U8 data) 
{ 
    _iicMode      = WRDATA; 
    _iicPt        = 0; 
    _iicData[0]   = (U8)addr; 
    _iicData[1]   = data; 
    _iicDataCount = 2; 
     
    rIICDS        = slvAddr;            //0xa0 
      //Master Tx mode, Start(Write), IIC-bus data output enable 
      //Bus arbitration sucessful, Address as slave status flag Cleared, 
      //Address zero status flag cleared, Last received bit is 0 
    rIICSTAT      = 0xf0;       
      //Clearing the pending bit isn't needed because the pending bit has been cleared. 
    while(_iicDataCount!=-1) 
       Run_IicPoll(); 
 
 
 
    _iicMode = POLLACK; 
 
    while(1) 
    { 
        rIICDS     = slvAddr; 
        _iicStatus = 0x100;             //To check if _iicStatus is changed  
        rIICSTAT   = 0xf0;              //Master Tx, Start, Output Enable, Sucessful, Cleared, Cleared, 0 
        rIICCON    = 0xe0;              //Resumes IIC operation.  
        while(_iicStatus==0x100)   
            Run_IicPoll(); 
               
        if(!(_iicStatus & 0x1)) 
            break;                      //When ACK is received 
    } 
    rIICSTAT = 0xd0;                    //Master Tx condition, Stop(Write), Output Enable 
    rIICCON  = 0xe0;                    //Resumes IIC operation.  
    Delay(1);                           //Wait until stop condtion is in effect. 
      //Write is completed. 
       
} 
         
//************************[ _Rd24C080 ]******************************** 
void _Rd24C080(U32 slvAddr,U32 addr,U8 *data) 
{ 
    _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) 
        Run_IicPoll(); 
 
    _iicMode      = RDDATA; 
    _iicPt        = 0; 
    _iicDataCount = 1; 
     
    rIICDS   = slvAddr; 
    rIICSTAT = 0xb0;                    //Master Rx,Start 
    rIICCON  = 0xe0;                    //Resumes IIC operation.    
    while(_iicDataCount!=-1) 
        Run_IicPoll(); 
 
    *data = _iicData[1]; 
} 
 
//**********************[ Run_IicPoll ]********************************* 
void Run_IicPoll(void) 
{ 
    if(rIICCON & 0x10)                  //Tx/Rx Interrupt Enable 
       IicPoll(); 
}        
     
//**********************[IicPoll ]************************************** 
void IicPoll(void) 
{ 
    U32 iicSt,i; 
     
    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  = 0xe0;                //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 = 0xe0;                 //Resumes IIC operation with ACK 
            break; 
 
        case WRDATA: 
            if((_iicDataCount--)==0) 
            { 
                rIICSTAT = 0xd0;                //stop MasTx condition  
                rIICCON  = 0xe0;                //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 = 0xe0;                     //resumes IIC operation. 
            break; 
 
        case SETRDADDR: 
//            Uart_Printf("IicPoll() SETRADDR [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 = 0xe0;             //resumes IIC operation. 
            break; 
 
        default: 
            break;       
    } 
}