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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!
Honored Contributor
