remote upgrade EPCS config data

I have tried something similar before. I also tried rpd and rbf files with no success. In the end, the only way I have ever got it to work was using the command line utililty sof2flash. It is included with NIOS II EDS. This utility converts a sof file to an S-record file.

How did you write rbf file into EPCS? I have EPCS16 on my board and I can read and write into the EPCS16 using SPI. Now using this SPI, I want to write rbf file into EPCS. But there are plenty of bytes in rbf file. So it seems very difficult to apply bit-reversal to each byte manually. Is there any easy way to write these bytes into EPCS? Is there a way to read the contents of rbf file using SPI or UART?

I always read back the EPCS that I programmed with the .jic and the I also read it back when I have programmed it through .rbf/.rpd and compare that way you can tell what the problem is. At least you will find out if you have an endian problem or similar.

I got it. An embedded guy provided me an application which can convert the rbf contents into a hex file(Which contains nothing but an array. The elements of this array are the bytes in the rbf). I can include this hex file in Nios and now I can easily read it, apply byte reversal and write into the EPCS. The whole massive EPCS was written into just 10 seconds.