Frame Buffer (sopc) Issues

1 - Your DDR controller has a local interface width of 32 bits yet you've set your frame buffer to have a width of 256. Make your frame buffer 32 bits to match the DDR controller.

2 - You're running the DDR controller at a local interface width of 32 bits and a frequency of 133MHz. Just be aware that under this configuration you're consuming 69.3% of the available memory bandwidth. This is fine but your memory accesses have to be efficient for it to work.

Jake