Honored Contributor
Honored ContributorI testet the epcs controller with 50 Mhz, (the same cpu freq) and does not work. Also tested with 20 mhz (altpll) and does not work as well.
I tested exporting the epcs pins to the verilog top level, and I assigned to the pyshical epcs pins. Now I have something new. The FPGA is configured when I download the sof file, if I run the jtag command, I get: $ jtagconfig -n 1) USB-Blaster [USB-0] 020F70DD EP3C120/EP4CE115 Node 19104600 Nios II# 0 Node 0C006E00 JTAG UART# 0 Design hash 6122D8B3ADF70138D8B4 The processor is running, but if I try to ask for the EPCS I have the following: nios2-flash-programmer --epcs --base=0x00021000 --debug Using cable "USB-Blaster [USB-0]", device 1, instance 0x00 Resetting and pausing target processor: OK Processor data bus width is 32 bits Looking for EPCS registers at address 0x00021000 (with 32bit alignment) Initial values: 0001703A 04C00074 9801483A 9CFFF804 983FFD1E 0000203A Not here: reserved fields are non-zero Looking for EPCS registers at address 0x00021100 (with 32bit alignment) Initial values: 93000237 6300080C 603FFD26 90000335 A8000C26 03010004 Not here: reserved fields are non-zero Looking for EPCS registers at address 0x00021200 (with 32bit alignment) Initial values: 02C02004 002EE03A 00000F06 90000335 4000683A 0017883A Not here: reserved fields are non-zero Looking for EPCS registers at address 0x00021300 (with 32bit alignment) Initial values: 003FD006 5280040C 501496FA 701CD07A 729CB03A 843FFFC4 Not here: reserved fields are non-zero Looking for EPCS registers at address 0x00021400 (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 EPCS identifier and signature are all ones - please check for data stuck high No EPCS layout data - looking for section [EPCS-FF] Unable to use EPCS device Leaving target processor paused I am not using MMU, actually I use the NIOS economyc version which do not have the MMU / MPU support.
