Use riscv32-unknown-elf-objcopy to generate Verilog memory init files instead of octal dump (od)

[rafaelcalcada]

Octal dump might not be present in all Linux distributions, and my own code to generate the hex dump using it might not work in all cases. riscv32-unknown-elf-objcopy is a safer option and it is always present.

[AlexxMarkov]

Hi @rafaelcalcada,

This seems to work, but if your linking address is not 0x00000000, but let’s say 0x10000000. Then you will receive the address @10000000 at the very beginning of the file. And as a result, you will most likely get something like this:

$readmem file address beyond bounds of array

But since we have a link from address 0x00000000, if this does not change, then there is no need to worry.

[rafaelcalcada]

This format is also accepted. I though there could only be one word per line, but more than one are allowed. And the lines starting with @ tell $readmemh the address where the data must be placed. I tested in Verilator and Vivado, both accept this format.

[AlexxMarkov]

@rafaelcalcada I've edited the comment a bit, please look at it again.