“i have 6 seven segments interfaced with the controller”.
Please post the circuit of the same, so that we can help you.
The SSD looks simple, but it is the most difficult thing to be coded as far as my experience is concerned. Also the controller can’t do other tasks while running the display. The reason is that it should be refreshed at a high rate and the number of SSD increases, the speed should be made high. You can’t easily get it right if you are a beginner!
That’s why suggest you to look for SSD driver ICs.
Anyway if you post the circuit, I’ll try to explain how to code it.