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Yes. Xilinx chips can do on-the-fly reconfiguration. So you can have your bootstrap loader and then either load a more complete firmware from the spi chip, or o
by Sanddancer 11y ago
Yes. Xilinx chips can do on-the-fly reconfiguration. So you can have your bootstrap loader and then either load a more complete firmware from the spi chip, or over pcie
- mng2 11y agoI don't think it's supported for Spartan-6 though.
- vardump 11y agoSo it's not possible to implement compliant PCIe interface together with some bigger block with this board?
- mng2 11y agoNot with official workflows at least, and even then, you would somehow have to keep the PCIe block up during reconfiguration for compliance. I think it would be difficult to reverse engineer to that level. The easier thing to do would be to delay enumeration.
- Sanddancer 11y agoIt is as of ISE-12. Some people, in fact, have reversed the datastream and can do it live, automatically, in realtime https://vjordan.info/log/fpga/full-dynamic-partial-reconfiguration-sequence-on-xilinx-spartan6-lx9.html https://vjordan.info/log/fpga/full-dynamic-partial-reconfigu...
- vardump 11y agoThat looks very interesting, thanks!
- jeff_marshall 11y agoyeah, isn't that hard to get the basics by reading the docs and doing some basic experiments with explicit placement and examining the resulting bitstream. When I looked at the encryption format for the virtex 5 series it was quicker to reverse engineer it than it was to find someone within Xilinx that could explain it (just basic bit/byte order, what's covered by encryption, etc). At the end of the day, FPGA configuration logic is just another state machine ;)