We are using the AD9889B chip in our system. We have the video working at the moment. We are working on getting audio to work.
We are using a single I2S line (I2S0). I2S0, SCLK, LRCLK, and MCLK lines are connected. I2S is being driven with a stereo audio signal of 44.1 kHz
When the audio lines are active, then I observe that the AD9889B does not generate any output. We have a monitor connected to the HDMI output. If a video is playing, then the monitor turns off. When the video stops playing (i.e. no audio), the monitor comes alive again.
I am unable to explain this behaviour. Any ideas on why this might happen ?
For a start, I want the AD9889B to ignore any incoming audio. I tried to configure the chip to ignore audio (by setting Bit 5 of 0x0B to 1) -- but this does not yield not change the behaviour of the chip.