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Altera_Forum
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10 years ago

boot NIOS and FPGA from EPCS flash

Hi all, I am having problems booting up my Nios C code from EPCS. I am building my own FPGA board, not using a demo board. I'm using Quartus 15.0 and DE0 NanoBoard( Cyclone IV as FPGA) My app...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Hi Daixiwen,

Thank you for taking time to resolve my problem, I appreciate it.

1) Yes, i can get the correct information about the device as shown below :

This flash has 1 erase regions

start 0x00000000 End 0x00800000 Number of Blocks 128 Block Size 0x00010000

2) The device is closed only when is fails to open. So i don't need to reopen it when i want to write or read.

3) I removed the global to local variables as you suggested and always the samehttps://www.alteraforum.com/forum/attachment.php?attachmentid=11017 thing.

4) I put printf of the fd and test_offset before Write_flash and Read_flash and are the same for both function. The offset is tested and it is not out of bounds.

5) I get the same wrong values each time, you find enclosed a picture about these values.

Best regards