How to prevent FPGA devindex from changing?

[lingdianvision]

I have four FPGA devices on one PC and I realized that devindex is not constant. devindex=0 for the FPGA on PC A. Next time I turn on the PC, I may need devindex=1 to properly turn on the FPGA on PC A. How can I solve this problem? Is there any way to determine what the devindex is on PC A?

[ufrisk]

Currently there is no good way. I mean you can probably start MemProcFS and read the computer name via the API from \sys\computername.txt (https://github.com/ufrisk/MemProcFS/wiki/FS_SysInfo) but that solution isn't very nice.

The FTDI supports addressing via serial number as well, but I haven't added it so I'd have to add it to make it more stable I guess.

Please let me know if the reading of the computer name would be sufficient. If it's the wrong computer you could shut down and read from the other device...

[lingdianvision]

Thank you very much for your reply. Your plan can solve my problem. But I still need to write a part of the code to implement.
I hope that in the future, a PCNAME parameter can be added to the VMM.DLL Initialize function, which can be correctly connected to the correct FPGA device each time.
"-Device", "fpga: // pcname = pc_001"
"-Device", "fpga: // pcname = pc_002"
...........

[lingdianvision]

I also found a problem where, when opening devices with devindex=0 and devindex=1, if the computer that the device devindex=0 is on is shut down or loses power, the VMM_HANDLE obtained by opening the device devindex=1 will become invalid and no longer work.