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AD9889B -HDMI - Read to any register results 0xFF

Question asked by nickchaw on Oct 16, 2012
Latest reply on Oct 16, 2012 by GuenterL

Hi

 

I am trying to Start the AD9889B chip i have in my Stratix IV Development board, with no luck. Following is the preocedure i am following.

 

data = I2C_read(I2C_OPENCORES_0_BASE, 0x41);

data = I2C_read(I2C_OPENCORES_0_BASE, 0x42);

if ((data & 0x40) && (data & 0x20)) {

       I2C_write(I2C_OPENCORES_0_BASE, 0x41, 0x10); // power up HDMI chip

   }

data = I2C_read(I2C_OPENCORES_0_BASE, 0x41);

 

Every Read results in 0xFF value. could you please suggest what i am doing wrong.

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