--- Quote Start ---
- from this error i found some tips in Altera Knowledge Base , saying it can be linked to the EPCS controller not being in the proper RESET state when trying to be accessed by the JTAG module inside the NiosII cpu
--- Quote End ---
Title
Why does the Nios II Processor Flash controller not find the EPCS registers and fail when trying to program the flash?
Description
The JTAG debug module in the Nios® II Processor asserts the reset output to clear registers in the flash controller during the controller detection phase. Detection can fail if the registers are not seen to be in their default state.
Ensure the jtag_debug_module_reset output from the Nios II Processor is connected to the EPCS Serial Flash Controller reset input.
http://www.altera.com/support/kdb/solutions/rd07072011_71.html
Honored Contributor
