[Iverilog-devel] Reading a file of variable length without Icarus warnings

[R. D. <rdi...@ya...>]

Hi all:

I'm trying to read a hex firmware file into a Verilog array with $readmemh().

The firmware file's size depends on the C source code, so that, although it will
always be smaller than the Verilog array, its size is not fixed. I'm getting these warnings: 

WARNING: minsoc_bench.v:111: $readmemh: Standard inconsistency, following 1364-2005.
WARNING: minsoc_bench.v:111: $readmemh(../../sw/uart/uart.hex): Not enough words in the file for the requested range [0:32767].


The "Standard inconsistency" text could by the way be more user friendly.


I guess the problem is that I'm trying to read too much. How do I find out the file size before calling $readmemh(), in order to avoid those warnings?

The file's data length is inside the file itself, as a 4-byte header, but if I try to read just that 4-byte header,
I get this warning, because I'm reading too little (!):

WARNING: minsoc_bench.v:111: $readmemh(../../sw/uart/uart.hex): Too many words in the file for the requested range [0:3].

Thanks,
  R. Diez