The size of my sof file is 150KB and it fits in an EPCS4 but I want to know how much room I have for expansion. (I convert it to jic for programming). Am I right in assuming that I am using about 150Kx8/4M = 30%?
If you want to see how big the programming data is, look at the size of the rbf or rpd file. Also, you can read the datasheet for the fpga you are using to see what the maximum programming file size is.
Using "bitstream data compression" and looking at the size of the resulting .rbf file is the simplest way of doing it. Data compression saves 60% of data in my 87% full FPGA design.
