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Valued Contributor III
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Preloader issue with altera 13.0

hello 

 

I'm trying to build entire linux image(preloader, bootloader, kernel ...etc)for DE1-Soc board. 

 

first I thought I should understand the whole booting sequence, I planned to boot only preloader first. 

 

I made preloader-mkpimage.bin by altera 13.0 EDS BSP editor, and used dd command to copy preloader binary to sd card. 

(my host computer is window 7 , so I made preloader-mkpimage on window, and used dd command on ubuntu virtual machine) 

 

the sd card initially has one partition with id W95 FAT32 

 

the command was : sudo dd if=preloader-mkpimage.bin of=/dev/sdX bs=64k seek=0. 

 

But I don't see any terminal message so it seems not working ..  

 

what I tried to experiment is simple 

 

1. write preloader image to sd card and see if board only boots preloader. 

 

.. 

 

I guess the problem is preloader image is not valid although it has mkpimage signature. 

 

but preloader is generated by altera tools and I want to believe the preloader binary is fine ..  

 

I'm really struck here,, any advice?  

 

thanks in advance.
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