S3C2440 Camera test 분석(진행중...)

소스가 간단해서 분석이 쉬울줄 알았는데 왠걸 젠장...
interrupt가 복병.. interrupt에서 중요한일은 다 하기때문에
I2C도 잘 모르는 상황에서 시간을 좀 잡아먹을듯 싶다
I2C를 잘 모른다면 먼저 S3C2240 Datasheet에서 I2C부분 읽어볼것을 추천

CamReset();

rCIGCTRL |= (1<<31); //camera interface software reset              Delay(10);              rCIGCTRL &= ~(1<<31);

 

rCLKCON |= (1<<19);         //Control HCLK into Camera enable

 

CamPortSet();

void CamPortSet(void) {                           save_GPJCON = rGPJCON;                           save_GPJDAT = rGPJDAT;                           save_GPJUP = rGPJUP;                                        rGPJCON = 0x2aaaaaa;     // 0010 1010 1010 1010 1010 1010 1010                                                              // GPJ를 CAM으로 set                           rGPJDAT = 0;                   // Data register를 0으로 초기화                           rGPJUP = 0;                     // GPJ pull-up }

 

ChangeUPllValue(60, 4, 1);              // UPLL clock = 96MHz, PLL input 16.9344MHz

void ChangeUPllValue(int mdiv,int pdiv,int sdiv) {     rUPLLCON = (mdiv<<12) | (pdiv<<4) | sdiv;   }

 

rCLKDIVN|=(1<<3);            // UCLK 48MHz setting for UPLL 96MHz

// 0:48MHz, 1:24MHz, 2:16MHz, 3:12MHz...

                                        // Camera clock = UPLL/[(CAMCLK_DIV+1)X2]

Uart_Printf("1...\n");

             switch(USED_CAM_TYPE)             // USED_CAM_TYPE = 5

             {

             case CAM_AU70H :

                           if (AU70H_VIDEO_SIZE==1152)

                                        SetCAMClockDivider(CAMCLK24000000); //Set Camera Clock for SXGA

                           if (AU70H_VIDEO_SIZE==640)

                                        SetCAMClockDivider(CAMCLK16000000); //Set Camera Clock for VGA

                           break;

             case CAM_S5X3A1 :

                           SetCAMClockDivider(CAMCLK24000000); //Set Camera Clock for SXGA

                           break;

             default :              // 24MHz

                           SetCAMClockDivider(CAMCLK24000000); //Set Camera Clock 24MHz s5x532, ov7620

void SetCAMClockDivider(int divn) // CAMCLK24000000 = 5 {              rCAMDIVN = (rCAMDIVN & ~(0xf))|(1<<4)|(divn); // CAMCLK is divided.. }

 

                           //Uart_Printf("rCAMDIVN : 0x%x\n", rCAMDIVN);        //0x11

                           break;

             }

 

Uart_Printf("2...\n");

// Initializing camera module

CamModuleReset(); // s5x532 must do this..

void CamModuleReset(void) {              switch(USED_CAM_TYPE)             //USED_CAM_TYPE = 5              {              case CAM_OV7620 : // reset - active high              case CAM_S5X532 : // reset - active low, but H/W inverted.. so, in this case active high              case CAM_S5X433 : // reset - active low, but H/W inverted.. so, in this case active high              case CAM_S5X3A1 : // reset - active low, but H/W inverted.. so, in this case active high                            rCIGCTRL |= (1<<30);          //external camera reset high                            Delay(30);                            rCIGCTRL &= ~(1<<30);     //external camera reset low                            break;              case CAM_AU70H : // reset - active low #if REBIS              case CAM_MICRON: // reset - active low CAM_MICRON = 5 #endif              default :                           //CIGCTRL [30] : External camera processor reset or power down                            rCIGCTRL &= ~(1<<30);     //external camera reset low                            Delay(10);                            rCIGCTRL |= (1<<30);        //external camera reset high                            break;              } }

 

Delay(500); // ready time of s5x433, s5x532 IIC interface. needed...

CameraModuleSetting();

int CameraModuleSetting(void) {              unsigned int i, j, save_E, save_PE, RegAddr, RegData;              static U8 rdata[256];              int donestatus;                        IicPortSet();              //void IicPortSet(void)              //{              //           save_GPECON = rGPECON;              //           rGPECON = rGPECON & ~(0xf<<28) | (0xa<<28);              //                                                               //GPE15:IICSDA , GPE14:IICSCL                   //}                                                              //IIICSDA : IIC-bus data                                                                               //IICSCL : IIC-bus clock              // for camera init, added by junon              pISR_IIC = (unsigned)Cam_IICInt;                 //explain two rows                    rINTMSK &= ~(BIT_IIC);                //Enable ACK, Prescaler IICCLK=PCLK/512,              //Enable interrupt, Transmit clock value Tx clock=IICCLK/16              rIICCON  = (1<<7) | (1<<6) | (1<<5) | (0x3);                rIICADD  = 0x10;                    //24A0 slave address = [7:1]              rIICSTAT = 0x10;                    //IIC bus data output enable(Rx/Tx)              rIICLC = (1<<2)|(3);                                     // SDAOUT has 5clock cycle delay                donestatus=1;   #if REBIS #else              Camera_WriteBlock(); //           Camera_ReadBlock(); #endif                           return donestatus; }

void __irq Cam_IICInt(void) {   #if REBIS            //REBIS = 1                U32        iicSt, i;                ClearPending(BIT_IIC);              //#define              ClearPending(bit) {\           //BIT_IIC = 0x1 << 27              //                         rSRCPND = bit;\  //INT_IIC Requested(Source pending register)              //                         rINTPND = bit;\    //INT_IIC Requested(Interrupt pending register)              //                         rINTPND;\              //           }                           iicSt   = rIICSTAT;              rINTMSK |= BIT_IIC;                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( _CAMiicMode )              {                            case CAMRDDATA:                                                   if( (_CAMiicDataCount--) == 0 )       // case by I2C_Read16 or Rd_CamIIC                                         {                                                      _CAMiicData[_CAMiicPt++] = rIICDS;                                                                  rIICSTAT = 0x90;  // Stop MasRx condition                                                                                            // Rx/Tx Enable & Master receive mode                                                      rIICCON               = 0xEF;  // Resuems IIC operation.                                                                                            //prescaler? Tx clock = IICLK/(15 + 1)                                                                                            // No interrupt pending                                                                                            // IIC-Bus Tx/Rx interrupt enable                                                                                            // IICCLK = fPCLK/512                                                                                            // IIC-bus acknowledge enable                                                      Delay(1);             // Wait until stop condtion is in effect., Too long time...                                                                                //# need the time 2440:Delay(1), 24A0: Delay(2)                                                                                 // The pending bit will not be set after issuing stop condition.                                                      break;                                            }                                         _CAMiicData[_CAMiicPt++] = rIICDS;     //The last data has to be read with no ack.                                                                  //IICDS : Multi-master IIC-bus transmit/receive data shift register                                         if( (_CAMiicDataCount) == 0 )                                         {                                                      rIICCON = 0x6F;   // Resumes IIC operation with NOACK                                                                               //in case of S5X532 Camera.                                                                               //prescaler? Tx clock = IICLK/(15 + 1)                                                                               // No interrupt pending                                                                               // IIC-Bus Tx/Rx interrupt enable                                                                               // IICCLK = fPCLK/512                                                                               // IIC-bus acknowledge disable                                         }                                         else                                         {                                                      rIICCON = 0xEF;  // Resumes IIC operaton with ACK.                                         }                                         break;                              case CAMWRDATA:                       //case by I2C_Write16 or Wr_CamIIC                                         if( (_CAMiicDataCount--) == 0 )                                         {                                                      rIICSTAT = 0xD0;  // stop MasTx condition                                                      rIICCON               = 0xEF;  // resumes IIC operation.                                                      Delay(1);             // wait until stop condtion is in effect.                                                                               // # need the time 2440:Delay(1), 24A0: Delay(2)                                                                                // The pending bit will not be set after issuing stop condition.                                                      break;                                         }                                           rIICDS    = _CAMiicData[_CAMiicPt++];        //_iicData[0] has dummy.                                         for(i=0;i<10;i++);                                         //for setup time until rising edge of IICSCL                                         rIICCON  = 0xEF;                                         //resumes IIC operation.                                         break;                              case CAMSETRDADDR:                // case by I2C_Read16 or Rd_CamIIC                           // Uart_Printf("[S%d]",_iicDataCount);                                         if( (_CAMiicDataCount--) == 0 )                                         {                                                      rIICSTAT = 0xD0;  //stop MasTx condition                                                      rIICCON               = 0xEF;  //resumes IIC operation.                                                      Delay(1);                           //wait until stop condtion is in effect.                                                      break;                  //IIC operation is stopped because of IICCON[4]                                            }                                           rIICDS    = _CAMiicData[_CAMiicPt++];                                         for(i=0;i<10;i++);          //for setup time until rising edge of IICSCL                                         rIICCON  = 0xEF;          //resumes IIC operation.                                         break;                            default:                                         break;                   }                rINTMSK &= ~BIT_IIC;   #else      // #if REBIS                U32 iicSt,i;                ClearPending(BIT_IIC);              iicSt   = rIICSTAT;              rINTMSK |= BIT_IIC;                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(_CAMiicMode) {                            case CAMRDDATA:                                         if((_CAMiicDataCount--)==0) {                                                      _CAMiicData[_CAMiicPt++] = rIICDS;                                                                  rIICSTAT = 0x90;      //Stop MasRx condition                                                      rIICCON  &= ~(1<<4);      //Resumes IIC operation.                                                      Delay(1);             //Wait until stop condtion is in effect., Too long time...                                                                                // # need the time 2440:Delay(1), 24A0: Delay(2)                                                                                 //The pending bit will not be set after issuing stop condition.                                                      break;                                            }                                              _CAMiicData[_CAMiicPt++] = rIICDS;     //The last data has to be read with no ack.                                           if((_CAMiicDataCount)==0)                                                      rIICCON &= ~((1<<7)|(1<<4));          //Resumes IIC operation with NOACK                                                                                                         // in case of S5X532 Cameara  //                                                   rIICCON = 0x6f;                              //Resumes IIC operation with NOACK                                                                                                         // in case of S5X532 Cameara                                                 else                                                      rIICCON &= ~(1<<4);         // Resumes IIC operation with ACK                                                                                            // No interrupt pending                                         break;                            case CAMWRDATA:                                         if((_CAMiicDataCount--)==0) {                                                      rIICSTAT = 0xd0;                //stop MasTx condition                                                      rIICCON  &= ~(1<<4);                //resumes IIC operation.                                                      Delay(1);             // wait until stop condtion is in effect.                                                                               // # need the time 2440:Delay(1), 24A0: Delay(2)                                                                   //The pending bit will not be set after issuing stop condition.                                                      break;                                            }                                         rIICDS = _CAMiicData[_CAMiicPt++];        //_iicData[0] has dummy.                                         for(i=0;i<10;i++);                  //for setup time until rising edge of IICSCL                                                      rIICCON &= ~(1<<4);                     //resumes IIC operation.                                         break;                            case CAMSETRDADDR: //Uart_Printf("[S%d]",_iicDataCount);                                         if((_CAMiicDataCount--)==0) {                                                      rIICSTAT = 0xd0;                //stop MasTx condition                                                      rIICCON  &= ~(1<<4);                //resumes IIC operation.                                                      Delay(1);      //wait until stop condtion is in effect.                                                        break;                  //IIC operation is stopped because of IICCON[4]                                            }                                         rIICDS = _CAMiicData[_CAMiicPt++];                                         for(i=0;i<10;i++);          //for setup time until rising edge of IICSCL                                                      rIICCON &= ~(1<<4);             //resumes IIC operation.                                         break;                            default:                                         break;                   }                rINTMSK &= ~BIT_IIC;   #endif    //           #if REBIS #else   }     void Camera_WriteByte(void) {   #if REBIS                U32 RegAddr;              U16 RegData;                Uart_Printf("Input Write Register Address of %s\n=>", CAM_NAME);              RegAddr = (U32)Uart_GetIntNum();                  Uart_Printf("Input Write Transfer Data into %s\n=>", CAM_NAME);              RegData = (U16)Uart_GetIntNum();                I2C_Write16( CAM_ID, RegAddr, RegData );   #else                unsigned int i, j, save_E, save_PE, RegAddr, RegData, pageNo;           #if (USED_CAM_TYPE==CAM_S5X532)||(USED_CAM_TYPE==CAM_S5X3A1)              Uart_Printf("Input Write Page No of %s\n=>", CAM_NAME);              pageNo = (U8)Uart_GetIntNum(); #endif                Uart_Printf("Input Write Register Address of %s\n=>", CAM_NAME);              RegAddr = (U8)Uart_GetIntNum();                  Uart_Printf("Input Write Transfer Data into %s\n=>", CAM_NAME);              RegData = (U8)Uart_GetIntNum();   #if (USED_CAM_TYPE==CAM_S5X532)||(USED_CAM_TYPE==CAM_S5X3A1)              Wr_CamIIC(CAM_ID, (U8)0xec, pageNo);  // set Page no #endif              Wr_CamIIC(CAM_ID, (U8)RegAddr, RegData); // set register after setting page number   #endif    //           #if REBIS #else   }

 

Camera_WriteBlock();

void SetCAMClockDivider(int divn) // CAMCLK24000000 == 5 {              rCAMDIVN = (rCAMDIVN & ~(0xf))|(1<<4)|(divn); // CAMCLK is divided.. }

 

Uart_Printf("Initializing end...\n");