IIC例程
/* device configuration structure */
typedef struct {
Uint32 i2coar;
Uint32 i2cimr;
Uint32 i2cclkl;
Uint32 i2cclkh;
Uint32 i2ccnt;
Uint32 i2csar;
Uint32 i2cmdr;
Uint32 i2cpsc;
} I2C_Config;
I2C配置结构体(I2C_config)、I2C 写数据函数(I2C_writeByte)、I2C 配置操作函数(I2C_RSETH)
/*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 */
};
********************************************************************/
/* 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;
}
}
}
