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ADV7181C采集VGA图象问题

erp12 在 2015-9-24 詢問的問題
最後回覆由adi_angela於2015-10-8提供

我在使用ADV7181C采集PC输出的VGA图象,图象分辨率是1024x768,ADV7181C被设置成SDR-16bit-YUV422输出,寄存器设置如下(省去了器件地址0x42):

 

unsigned char adv7181c_regs[]={

//##CP XGA 1024x768##

//:RGB  1024x768 _@ 60Hz 12-Bit DDR 65.000MHz Out through HDMI:

 

 

0x03, 0x02<<2,  //16-bit @ LLC2 4:2:2   LLC2=LLC1 /2

 

 

0x05, 0x02, // Prim_Mode =010b for GR

0x06, 0x0C, // VID_STD=1100b for 1024x768 _@ 60

0xC3, 0x46, // ADC1 to Ain4, ADC0 to Ain6,

0xC4, 0xB5, // ADC2 to Ain5 and enables manual override of mux

0x1D, 0x47, // Enable 28MHz Crystal

0x3A, 0x21, // set latch clock settings to 010b, Power Down ADC3

0x3B, 0x61, // Enable Internal Bias

0x3C, 0x5D, // PLL_QPUMP to 101b

0x6A, 0x00, // DLL Phase Adjust

0x6B, 0x83, // Swap Pr & Pb

0xC9, 0x00, // Set DDR_DISABLE

0x73, 0x90, // Set man_gain

0x7B, 0x1D, // TURN OFF EAV & SAV CODES Set BLANK_RGB_SEL

0x85, 0x03, // Enable DS_OUT

0x86, 0x0B, // Enable stdi_line_count_mode

0xF4, 0x3F, // Max Drive Strength

0x0E, 0x80, // ADI Recommended Setting

0x52, 0x46, // ADI Recommended Setting

0x54, 0x00, // ADI Recommended Setting

0xF6, 0x3B, // ADI Recommended Setting

0x0E, 0x00, // ADI Recommended Setting

0x52, 0x80, // ADI Recommended Setting

0x57, 0x08, // ADI Recommended Setting

0x5B, 0x20, // ADI Recommended Setting

0x5C, 0x00, // ADI Recommended Setting

0x62, 0x00, // ADI Recommended Setting

0x63, 0x01, // ADI Recommended Setting

0x67, 0x03, // ADI Recommended Setting

0x68, 0x01, // ADI Recommended Setting

};

 

 

采集到的图象如下:

 

未命名.bmp

 

 

原始图象如下:

原始图片.jpg

 

 

请问这是什么问题造成的呢?

 

另外,我在使用8bit  sdr bt656格式采集CVBS图象时是正常的

結果