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Found 4 results

  1. dindea

    Flash Erase

    Programming the flash of Papilio PRO with a new FPGA application will require erasing the flash or a part of it. My question is: How much will be erased? The entire flash or only so many blocks that the application will occupy? Or "something in between", e.g. "always 2 MBits"? Or the number of blocks occupied ny the greatest possible application for SPARTAN6, by assumption different for ...LX4 and ...LX9?
  2. Hello Forum, My first time on a Forum, hope I get the etiquette correct. Recently got my Papilio Duo and a LogicStart wingy, itching to get it all running. Intend to VHDL, not drag and drop...that's the intention anyway. Essentially, being from an electronics background, I like to know what's going on. To that end, I've been wading my way through the plethora of Xilinx datasheets associated with the Spartan-6-LX9. At the moment I have couple of quick questions for the collective forumers The LX9 FPGA is set with M0 =1 and M1 =0, this sets the device in Serial Master Mode so it will get its configuration bit stream from the Flash on power up or if PROGRAM_B is pulled low, so : 1) How does data from the PC get programmed to the Flash? 2) I see other questions relating to the PC software configuring the FPGA directly through the USB port,, am I missing something in the circuit diagram, I cant see how this is possible? Unless there is something pre-configured, pre-programmed that we are shielded from....... hope they're not too stupid questions. Thanks Andrew
  3. Hi, Is it possible to access the SPI flash on the Papillio One board from my Verilog code? Some part of the flash is taken by the bitfile for loading FPGA configuration, and I'd like to use some free flash blocks (a few hundred bytes) My RTL receives data from a UART interface, processes it (SHA-1) and needs to store the signature on non-volatile storage. If not, I will have to get a separate SPI flash chip for storage. Thanks Anirban
  4. Hi, I know that in general the configuration memory of FPGAs can be accessed and used with some limitations. And as the ZPUino loads it's program from the FLASH I would be very interested to know if it's possible to store and read some values from the sketch? Thanks, Tobias