合众达DM642程序注释

 /********************************************************************/
 /*                        灰度图
 运行结果：在屏幕之中画出一块区域显示灰度图像                                    */
 /********************************************************************/
 /* 关于csl：
 1,用于配置、控制和管理DSP片上外设
 2,已为C6000和C5000系列DSP设计了各自的CSL库
 3,CSL库函数大多数是用C语言编写的，并已对代码的大小和速度进行了优化
 4,CSL库是可裁剪的：即只有被使用的CSL模块才会包含进应用程序中
 5,CSL库是可扩展的：每个片上外设的API相互独立，增加新的API，对其他片上外设没有影响  */
 #include <csl.h>                 /* 总库，提供外设接口和基本配置 */
 // 具体的接口定义，头文件中定义了接口的地址等
 #include <csl_emifa.h>           /* emifa是一种64位的外部接口，可连接64/32/16/8bit的器件 */
 #include <csl_i2c.h>           /* 一种两线式串行总线 */
 #include <csl_gpio.h>          /* 也是一种通用的输入输出接口 */
 #include <csl_irq.h>           /* 一些基本中断的定义 */
 #include <csl_chip.h>
 #include <csl_dat.h>
 #include "iic.h"
 #include "vportcap.h"
 #include "vportdis.h"
 #include "sa7121h.h"             /* SAA7121可以将数字信号编程模拟信号和下面的编码芯片一样都采用iic总线 */
 #include "TVP51xx.h"             /* 视频编码芯片，将模拟信号进行数字化，这是其进行配置的头文件 */
 /*SEEDDM642的emifa的设置结构*/
 EMIFA_Config Seeddm642ConfigA ={
        0x00052078,/*gblctl EMIFA(B)global control register value */
                   /*将CLK6、4、1使能；将MRMODE置1；使能EK2EN,EK2RATE*/
        0xffffffd3,/*cectl0 CE0 space control register value*/
                   /*将CE0空间设为SDRAM*/
        0x73a28e01,/*cectl1 CE1 space control register value*/
                   /*Read hold: 1 clock;
                     MTYPE : 0000,选择8位的异步接口
                     Read strobe ：001110；14个clock宽度
                     TA：2 clock; Read setup 2 clock;
                     Write hold :2 clock; Write strobe: 14 clock
                     Write setup :7 clock
                     --                   ---------------
                       /      14c        /1c
                        /----------------/ */
        0x22a28a22, /*cectl2 CE2 space control register value*/
        0x22a28a42, /*cectl3 CE3 space control register value*/
        0x57115000, /*sdctl SDRAM control register value*/
        0x0000081b, /*sdtim SDRAM timing register value*/
        0x001faf4d, /*sdext SDRAM extension register value*/
        0x00000002, /*cesec0 CE0 space secondary control register value*/
        0x00000002, /*cesec1 CE1 space secondary control register value*/
        0x00000002, /*cesec2 CE2 space secondary control register value*/
        0x00000073 /*cesec3 CE3 space secondary control register value*/
 };
 /*SEEDDM642的IIC的设置结构*/
 I2C_Config SEEDDM642IIC_Config = {
     0,  /* master mode,  i2coar;采用主模式   */
     0,  /* no interrupt, i2cimr;只写，不读，采用无中断方式*/
     (20-5), /* scl low time, i2cclkl;  */
     (20-5), /* scl high time,i2cclkh;  */
     1,  /* configure later, i2ccnt;*/
     0,  /* configure later, i2csar;*/
     0x4ea0, /* master tx mode,     */
             /* i2c runs free,      */
             /* 8-bit data + NACK   */
             /* no repeat mode      */
     (75-1), /* 4MHz clock, i2cpsc  */
 };
 CHIP_Config SEEDDM642percfg = {
     CHIP_VP2+/
     CHIP_VP1+/
     CHIP_VP0+/
     CHIP_I2C
 };
 I2C_Handle hSeeddm642i2c;
 int portNumber;
 extern SA7121H_ConfParams sa7121hPAL[45];
 extern SA7121H_ConfParams sa7121hNTSC[45];
 Uint8 vFromat = 0;
 Uint8 misc_ctrl = 0x6D;
 Uint8 output_format = 0x47;
 // 地址为0 for cvbs port1,选择复合信号做为输入
 Uint8 input_sel = 0x00;
 /*地址为0xf，将Pin27设置成为CAPEN功能*/
 Uint8 pin_cfg = 0x02;
 /*地址为1B*/
 Uint8 chro_ctrl_2 = 0x14;
 /*图像句柄的声明*/
 VP_Handle vpHchannel0;
 VP_Handle vpHchannel1;
 VP_Handle vpHchannel2;
 /*确定图像的参数*/
 int numPixels = 720;//每行720个像素
 int numLines  = 576;//每帧576行（PAL）

 /*确定处理的范围*/
 /*A             */
 /*              */
 /*             D*/
 int intAPixels = 190;
 int intALines = 59;
 int intDPixels = 530;
 int intDLines = 229;
 /******************************/
 /*****画矩形边框函数的声明*****/
 void drawRectangle();
 /*消去彩色*/
 void removeColor();
 /*采集与显示缓冲区的首址*/
 Uint32 capYbuffer  = 0x80000000;
 Uint32 capCbbuffer = 0x800675c0;
 Uint32 capCrbuffer = 0x8009b0a0;
 Uint32 disYbuffer  = 0x80100000;
 Uint32 disCbbuffer = 0x801675c0;
 Uint32 disCrbuffer = 0x8019b0a0;
 Uint32 tempYbuffer  = 0x80200000;   //临时
 Uint32 tempCbbuffer = 0x80300000;   //临时
 Uint32 tempCrbuffer = 0x80400000;   //临时
 /*图像格式标志*/
 Uint8 NTSCorPAL = 0;
 extern far void vectors();
 extern volatile Uint32 capNewFrame;
 extern volatile Uint32 disNewFrame;
 /*此程序可将四个采集口的数据经过Video Port0送出*/
 void main()
 {
     Uint8 addrI2C;
     int i;

 /*-------------------------------------------------------*/
 /* perform all initializations                           */
 /*-------------------------------------------------------*/
     /*Initialise CSL，初始化CSL库*/
     CSL_init();
     CHIP_config(&SEEDDM642percfg);
 /*----------------------------------------------------------*/
     /*EMIFA的初始化，将CE0设为SDRAM空间，CE1设为异步空间
      注，DM642支持的是EMIFA，而非EMIF*/
     EMIFA_config(&Seeddm642ConfigA);
 /*----------------------------------------------------------*/
     /*中断向量表的初始化*/
     //Point to the IRQ vector table
     IRQ_setVecs(vectors);
     IRQ_nmiEnable();
     IRQ_globalEnable();
     IRQ_map(IRQ_EVT_VINT1, 11);
     IRQ_map(IRQ_EVT_VINT0, 12);
     IRQ_reset(IRQ_EVT_VINT1);
     IRQ_reset(IRQ_EVT_VINT1);
     /*打开一个数据拷贝的数据通路*/
     DAT_open(DAT_CHAANY, DAT_PRI_LOW, DAT_OPEN_2D);
 /*----------------------------------------------------------*/
     /*进行IIC的初始化*/
     hSeeddm642i2c = I2C_open(I2C_PORT0,I2C_OPEN_RESET);
     I2C_config(hSeeddm642i2c,&SEEDDM642IIC_Config);
 /*----------------------------------------------------------*/
     /*进行TVP5150pbs的初始化*/
     /*选择TVP5150，设置第三通路*/
     GPIO_RSET(GPGC,0x0);/*将GPIO0不做为GPINT使用*/
     GPIO_RSET(GPDIR,0x1);/*将GPIO0做为输出*/
     GPIO_RSET(GPVAL,0x0);/*GPIO0输出为高，选择IIC1总线，配置
                            第二路，即为U21*/
     addrI2C = 0xBA >>1;
     _IIC_write(hSeeddm642i2c, addrI2C,0x00, input_sel);
     _IIC_write(hSeeddm642i2c, addrI2C,0x03, misc_ctrl);
     _IIC_write(hSeeddm642i2c, addrI2C,0x0D, output_format);
     _IIC_write(hSeeddm642i2c, addrI2C,0x0F, pin_cfg);
     _IIC_write(hSeeddm642i2c, addrI2C,0x1B, chro_ctrl_2);
     /*回读当前摄像设备的格式*/
     _IIC_read(hSeeddm642i2c, addrI2C,0x8c, &vFromat);
     vFromat = vFromat & 0xff;
     switch (vFromat)
     {
         case TVP51XX_NTSCM:
         case TVP51XX_NTSC443:
             NTSCorPAL = 1;/*系统为NTSC的模式*/
             break;
         case TVP51XX_PALBGHIN:
         case TVP51XX_PALM:
             NTSCorPAL = 0;/*系统为PAL的模式*/
             break;
         default:
             NTSCorPAL = 2;/*系统为不支持的模式*/
             break;
     }
     if(NTSCorPAL ==2)
     {
         /*系统不支持的模式，重新配置*/
         for(;;)
         {}
     }
 /*----------------------------------------------------------*/
     /*进行SAA7121H的初始化*/
     GPIO_RSET(GPVAL,0x0);/*GPIO0输出为低，选择IIC1总线，配置图像输出*/
     addrI2C = 0xB8 >>1; /*选择第0路的I2C的地址*/
     /*将第0路的视频输入口的数据口设为高阻状态，
       使能SCLK，将第27脚设为输入*/
     _IIC_write(hSeeddm642i2c, addrI2C,0x03, 0x1);
     /*配置SAA7121H*/
     GPIO_RSET(GPVAL,0x1);/*GPIO0输出为低，选择IIC1总线，配置图像输出*/
     /*初始化Video Port0*/
     /*将Vedio Port1设为encoder输出*/
     portNumber = 0;
     vpHchannel0 = bt656_8bit_ncfd(portNumber);
     addrI2C = 0x88 >>1;
     for(i =0; i<43; i++)
     {
         if(NTSCorPAL == 1)
         {
             _IIC_write(hSeeddm642i2c,
                        addrI2C,
                        (sa7121hNTSC[i].regsubaddr),
                        (sa7121hNTSC[i].regvule));
         }
         else
         {
             _IIC_write(hSeeddm642i2c,
                        addrI2C,
                        (sa7121hPAL[i].regsubaddr),
                        (sa7121hPAL[i].regvule));
         }
     }

 /*----------------------------------------------------------*/
     /*初始化Video Port1*/
     /*将Vedio Port1设为采集输入*/
     portNumber = 1;
     vpHchannel1 = bt656_8bit_ncfc(portNumber);
     bt656_capture_start(vpHchannel1);
     /*等待第一帧数据采集完成*/
     while(capNewFrame == 0){}
     /*采集完成，将数据存入显示缓冲区，并清采集完成的标志*/
     capNewFrame =0;
     for(i=0;i<numLines;i++)
     {
         /*传送临时Y缓冲区*/
         DAT_copy((void *)(capYbuffer + i * numPixels),
                  (void *)(tempYbuffer + i * numPixels),
                  numPixels);
         /*传送临时Cb缓冲区*/
         DAT_copy((void *)(capCbbuffer + i * (numPixels >> 1)),
                  (void *)(tempCbbuffer + i * (numPixels >> 1)),
                  numPixels>>1);
         /*传送临时Cr缓冲区*/
         DAT_copy((void *)(capCrbuffer + i * (numPixels >> 1)),
                  (void *)(tempCrbuffer + i * (numPixels >> 1)),
                  numPixels>>1);
      }
 /* 画边框，消去彩色灯操作都需要在缓冲区中进行 */
     /*画边框*/
     drawRectangle();

     /*消去彩色*/
     removeColor();
 /* 再将缓冲区的内容送入显示区 */
     for(i=0;i<numLines;i++)
     {
         /*传送Y缓冲区*/
         DAT_copy((void *)(tempYbuffer + i * numPixels),
                  (void *)(disYbuffer + i * numPixels),
                  numPixels);
         /*传送Cb缓冲区*/
         DAT_copy((void *)(tempCbbuffer + i * (numPixels >> 1)),
                  (void *)(disCbbuffer + i * (numPixels >> 1)),
                  numPixels>>1);
         /*传送Cr缓冲区*/
         DAT_copy((void *)(tempCrbuffer + i * (numPixels >> 1)),
                  (void *)(disCrbuffer + i * (numPixels >> 1)),
                  numPixels>>1);
      }


     /*启动显示模块*/
     bt656_display_start(vpHchannel0);
     /*建立一个死循环实时采集和播放*/
     for(;;)
     {
         /*当采集区的数据已经采集好，而显示缓冲区的数据已空*/
         if((capNewFrame == 1)&&(disNewFrame == 1))
         {
             /*将数据装入显示缓冲区，并清采集完成的标志*/
             capNewFrame =0;
             disNewFrame =0;
             for(i=0;i<numLines;i++)
             {
                 /*传送临时Y缓冲区*/
                 DAT_copy((void *)(capYbuffer + i * numPixels),
                          (void *)(tempYbuffer + i * numPixels),
                          numPixels);
                 /*传送临时Cb缓冲区*/
                 DAT_copy((void *)(capCbbuffer + i * (numPixels >> 1)),
                          (void *)(tempCbbuffer + i * (numPixels >> 1)),
                          numPixels>>1);
                 /*传送临时Cr缓冲区*/
                 DAT_copy((void *)(capCrbuffer + i * (numPixels >> 1)),
                          (void *)(tempCrbuffer + i * (numPixels >> 1)),
                          numPixels>>1);
              }

             /*画边框*/
             drawRectangle();

             /*消去彩色*/
             removeColor();

             for(i=0;i<numLines;i++)
             {
                 /*传送Y缓冲区*/
                 DAT_copy((void *)(tempYbuffer + i * numPixels),
                          (void *)(disYbuffer + i * numPixels),
                          numPixels);
                 /*传送Cb缓冲区*/
                 DAT_copy((void *)(tempCbbuffer + i * (numPixels >> 1)),
                          (void *)(disCbbuffer + i * (numPixels >> 1)),
                          numPixels>>1);
                 /*传送Cr缓冲区*/
                 DAT_copy((void *)(tempCrbuffer + i * (numPixels >> 1)),
                          (void *)(disCrbuffer + i * (numPixels >> 1)),
                          numPixels>>1);
              }

         }

     }

     for(;;)
     {}
   /*----------------------------------------------------------*/
     /*采集与回放*/

 }

 /*画矩形边框函数的定义*/
 void drawRectangle()
 {
     int i,j;
     /*画上边*/
     //奇数行
     for(i=intALines-4;i<intALines;i++)
     {
         for(j=intAPixels-6;j<intDPixels+6;j++)
         {
              *(Uint8 *)(tempYbuffer + i*numPixels + j) = 0x00;
         }
     }

     //偶数行
     for(i=numLines/2+intALines-4;i<numLines/2+intALines;i++)
     {
         for(j=intAPixels-6;j<intDPixels+6;j++)
         {
              *(Uint8 *)(tempYbuffer + i*numPixels + j) = 0x00;
         }
     }

     /*画下边*/
     //奇数行
     for(i=intDLines;i<intDLines+4;i++)
     {
         for(j=intAPixels-6;j<intDPixels+6;j++)
         {
              *(Uint8 *)(tempYbuffer + i*numPixels + j) = 0x00;
         }
     }

     //偶数行
     for(i=numLines/2+intDLines;i<numLines/2+intDLines+4;i++)
     {
         for(j=intAPixels-6;j<intDPixels+6;j++)
         {
              *(Uint8 *)(tempYbuffer + i*numPixels + j) = 0x00;
         }
     }

     /*画左边*/
     //奇数行
     for(i=intALines;i<intDLines;i++)
     {
         for(j=intAPixels-6;j<intAPixels;j++)
         {
              *(Uint8 *)(tempYbuffer + i*numPixels + j) = 0x00;
         }
     }

     //偶数行
     for(i=numLines/2+intALines;i<numLines/2+intDLines;i++)
     {
         for(j=intAPixels-6;j<intAPixels;j++)
         {
              *(Uint8 *)(tempYbuffer + i*numPixels + j) = 0x00;
         }
     }


     /*画右边*/
     //奇数行
     for(i=intALines;i<intDLines;i++)
     {
         for(j=intDPixels;j<intDPixels+6;j++)
         {
              *(Uint8 *)(tempYbuffer + i*numPixels + j) = 0x00;
         }
     }

     //偶数行
     for(i=numLines/2+intALines;i<numLines/2+intDLines;i++)
     {
         for(j=intDPixels;j<intDPixels+6;j++)
         {
              *(Uint8 *)(tempYbuffer + i*numPixels + j) = 0x00;
         }
     }
 }
 /*消去彩色*/
 void removeColor()
 {
     int i,j;
     //方框内奇数行
     for(i=intALines;i<intDLines;i++)
     {
         for(j=intAPixels/2;j<intDPixels/2;j++)
         {
             *(Uint8 *)(tempCbbuffer + i * (numPixels >> 1) + j) =  0x80;
             *(Uint8 *)(tempCrbuffer + i * (numPixels >> 1) + j) =  0x80;
         }
     }

     //方框内偶数行
     for(i=numLines/2+intALines;i<numLines/2+intDLines;i++)
     {
         for(j=intAPixels/2;j<intDPixels/2;j++)
         {
             *(Uint8 *)(tempCbbuffer + i * (numPixels >> 1) + j) =  0x80;
             *(Uint8 *)(tempCrbuffer + i * (numPixels >> 1) + j) =  0x80;
         }
     }
 }