Forum Discussion

Jcole's avatar
Jcole
Icon for Occasional Contributor rankOccasional Contributor
2 years ago
Solved

Programming S25FL256 through Cyclone 10 with file from Processor

Hi, I wanted to see if it is possible to load a S25FL256 with a Programming File (.rpd, .pof, .sof, etc) through the Cyclone 10 LP using a file received from the processor. Essentially what I'm t...
Configuration
Programmable Logic Device
  • FvM's avatar
    FvM
    2 years ago

    Hi,
    signaltap waveform shows that you don't understand Avalon MM timing requirements. We see e.g. mem_read active while mem_ waitrequest is asserted which must never happen.
    Imagine that mem_write starts a serial flash cycle with adress and data bits. Waitrequest indicates ongoing serial interface activity, next memory read/write can't happen before waitrequest is release. Similar problems exist with csr interface.

FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
2 years ago

Hi,
accessing flash connected to AS configuration pins doesn't require specific IP, just some assignments in Quartus. Also Quartus IP like altasmi_parallel, ASMI Parallel II and Generic Serial Flash Interface IP have the option to either use internal "hidden" connection to configuration pins or to export it manually. In the latter case it's the same situation as if you are using your own flash controller.

Dual-purpose pin settings in Device and Pin Options of all connected configuration pins must be "use as regular I/O"