How to write in EPCS

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Hello,

I am a newbie with Nios II. I'm doing a robotic project with a Cyclone and an EPCS4 flash memory.

I've added an EPCS controller in my SOPC Builder system.

I has to read/write some information in EPCS flash memory. I've tried to use the "epcs_command.h" header, but it doesn't work.

My software program stay blocked for example on this line :

device_id = epcs_read_device_id(epcs_flash_controller_0_base);

This is the same thing for the other functions from this header.

I read a lot of post on this forum, but I don't find any satisfying answer.

Would you help me please ?

If you don't use epcs_command.h, what functions and headers are you used to use ?

Thanks a lot.

mig

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It's been a while, so you probably don't care anymore; however, I recently ran into this problem as well, so I thought I would post a solution...

The short answer is that instead of this:

device_id = epcs_read_device_id(epcs_flash_controller_0_base);

you need to do this:

device_id = epcs_read_device_id(epcs_flash_controller_0_base+

epcs_flash_controller_0_register_offset);

This was definitely not clear from the Altera documentation I found; however, when using the functions in <epcs_commands.h>, the parameter 'alt_u32 base', is not what it seems (at least not to me)...

With other peripherals, you simply take the peripherals base address as defined in <system.h>. For the EPCS commands, you need to offset this base address by the register offset, also found in <system.h> (in the definition of the EPCS Flash controller, probably below the BASE value).

Hope this helps someone!