Frame Reader Initialization

Actually I have tried that, but the same problem occours. The Alpha Blending Mixer itself works. I can also show the layer of a Test Pattern. But as soon as I activate the pattern of the Frame Reader the system does not do what it is supposed to.

I have the feeling that there is something wrong with the setting of the Single Cycle Patterns and the number of Words read from memory. I have clocked video output with 4:2:2 sampling YCbCr. That means I actually need 2 single cycle patterns for one pixel instead of 3. (YCbYCr instead of RGB)

So the settings for the Single Cycle Patterns should be:

40*40*2 = 3200;

Since the width of the Onchip Memory is 64, eight (complete) single cycle bytes fit into one word of the memory. According to this the number of words that should be read from the memory should be the number of bytes needed for one picture divided by eight:

3200/8 = 400;

So the correct settings for single cycle pattern and number of words read from memory should be:

// Frame 0 Words

IOWR(FRAMEREADER_BASE, 5, 400); // 40*40*2 / ( 64/8 ) = 300

// Frame 0 Single Cycle Color Patterns

IOWR(FRAMEREADER_BASE, 6, 3200); // 40*40*2 number of pixels in the frame multiplied by the number of single cycles required to represent one pixel

Can anybody approve that?