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Altera_Forum's avatar
Altera_Forum
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18 years ago

Nios II can't open "/device/epcs_controller"

Got the message when running "memtest_1" and selecting "Test EPCS Serial Flash" from NIOS II IDE: -ERROR: Could not open /dev/epcs_controller I have a simple (test case) SOPC system cont...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Altera may have fixed this problem with the latest Quartus 8.x release. However, for migrating from 6.1 to 7.2SP3 the solution I found was:

1. Modify the "class.ptf" for the module in the "altera_avalon_epcs_flash_controller" directory of your install. Make sure you make a copy of it before you modify.

2. Search for the entry named "use_asmi_atom" and replace "true" to "false", or from "1" to "0" depending on your setup.

(Altera is inconsistent in "exposing" the epcs pins and "hiding" these pins somewhere between Quartus 7.x and Quartus 8.x - not sure why).

Let me know if your problem is resolved. I wasn't sure if I was the only one experiencing this problem as there was no postings from anyone even suggesting what to look for.