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Honored Contributor I
728 Views

EPCS16 and problems

Hi guys. 

I met a problem.As i understand, I am not first person,which has same problems. 

Lets go. 

When i try to program flash memory(Altera EPSC16N) by HW and for this purpose i have .jic file, everything is going perfectly. Then (after board restart) if i want to check some Nios2 code by Debug - again everything is perfect. But when i try to program flash(EPCS) by Nios image - here problems are starting.I am trying to program by nios2-flash-programmer-gui. 

In my application, reset-vector points to epcs_flash_controller_0. 

When i program flash, i receive following output: 

 

EPCS signature is 0xFF 

EPCS device doesn't support RDID command 

No EPCS layout data - looking for section[EPCS-FF] 

Unable to use EPCS device 

Leaving target processor paused 

Error Code: 8 for command ... 

 

I added nios2-flash-override.txt file and i receive same result. 

I even changed epcs component. 

 

It looks, like programmer cannot read correct sugnature. 

I also have other board with EPCS4N flash memory.In this memory everything is perfect. 

 

Plz,help guys. 

It is urgent. 

 

Thank you, Slava.
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3 Replies
Honored Contributor I
20 Views

I want to continue on this old thread but adding new conditions for the same error. 

I'm getting exactly the same error: 

No EPCS layout data - looking for section[EPCS-FF] 

Unable to use EPCS device 

Leaving target processor paused 

Error Code: 8 for command ... 

 

But a singularity is that I'm only getting it when programming a certain system. So it should be an error in the description (Qsys). The only difference between this system is that I added SDRAM, but it works when running on Nios II HW so I'm guessing SDRAM is not the problem, or is it?. 

 

*Should I use a tri-state?
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Honored Contributor I
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I am having the same issue with an EPCS64N. I have two boards running identical .sof loads - one works and returns this from nios2-flash-programmer: 

 

Looking for EPCS registers at address 0x30000400 (with 32bit alignment) 

Initial values: 00000000 00000000 00000260 00000000 00000000 00000001 

Valid registers found 

epcs signature is 0x16 

EPCS identifier is 0x202017 

Using EPCS size information from section [EPCS-202017] 

Device size is 8MByte (64Mbit) 

Erase regions are: 

offset 0: 128 x 64K 

EPCS status is 0x00 

 

 

The other fails and returns this:  

 

Looking for EPCS registers at address 0x30000400 (with 32bit alignment) 

Initial values: 00000000 00000000 00000260 00000000 00000000 00000001 

Valid registers found 

epcs signature is 0xff 

EPCS device doesn't support RDID command 

No EPCS layout data - looking for section [EPCS-FF] 

Unable to use EPCS device 

Leaving target processor paused 

 

Does anybody know why an identical (in theory) circuit and device would return a signature of 0xFF? I have replaced the EPCS64N - same result. I checked the DCLK, DATA, nCS, and ASDI signals with a scope and all look good and similar between boards. 

Are there bad devices floating around? (These were purchased from DigiKey - an authorized Altera distributor.)
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Honored Contributor I
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It appears that my problem is an open circuit between the EPCS and the FPGA on DATA0. I will update this post if that is found not to be the fault.

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