Forum Discussion
Altera_Forum
Honored Contributor
Honored ContributorProgram UBoot
Hi all, A couple of questions that people might be able to help me out with. There seems to be a common issue with setting up the initial boot sequence for a NIOS boot loader and whilst there i...
Altera_ForumHonored Contributor
Honored ContributorGreat info.
A few things. The docs talk about the epcs bootloader ROM as if this is some FPGA onchip ROM whose contents are determined during project compilation. Yet I see from your steps above the epcs bootloader gets bundled with the u-boot image. Are there two bootloaders? How do you figure out how much app code you can fit? For my HW the data sheet says: EPCS1 = 131072 EPC4 = 115564 ; uncompressed spare = 15508 ; ignoring bootloader overhead 15KB is not enough for u-boot, but if both the config and app could be compressed, that would allow around 100KB of app code. Do you lose the ability to use compressed files when you program with the flash programmer?
