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How to implement my own bootloader

Altera_Forum
Honored Contributor II
‎12-13-2005 06:26 AM
1,066 Views

Hi, 

My system doesn't use CFI Flash but SPI Flash, so I have to creat my own bootloader to read code from SPI Flash to SDRAM. 

Now, I have implemented a bootloader code which is located in an onchip memory and it can work fine to read data from SPI Flash to SDRAM. 

But I have a important question: 

Before reading data from SPI Flash to SDRAM, I should initialize the SPI Flash with my Main Code, but how can I get Main Code??? 

As I know, NiosII IDE will create *.elf for you, but this file will contain many more redundant code which is for programming CFI Flash. What I need is only the following sections: 

.exceptions, .rodata, .rwdata and .text 

 

Anyone help? 

 

Thanks very much!
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