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Found 1 result

  1. breakin

    Communication zpuino/fpga

    Hi! I've just recently received my DUO board and I have some beginners questions! First let me say that I'm super happy with it so good work everyone! Falling importance! 1) I've successfully done some zpuino stuff as well as some fpga stuff. I'm looking for a real simple way to communicate between zpuino and fpga. For now I would be happy if the zpuino could set a bit (when all init is ready) and then I could access it in my ISE schematics somehow. If this was running on the AVR I would go via an external pin, but that feels wrong now that I'm completely in fpga land! I've read a little about the wishbone concept but I was hoping I could postpone using it for a little bit. I mostly want simple internal GPIO. Am I missing something simple? 2) I've used malloc to grab a SRAM-memory block in the zpuino. I was wondering if there was a function get a block located at a certain place? I would want to use it to make sure that the zpuino never uses the memory. Something like. unsigned char *a = (unsigned char*)placed_malloc(position, size); That way I can _assume_ where my memory is located at, and the zpuino can malloc as much as it wants without stealing my memory. 3) Is there a way to connect an input directly to an output in an ISE schematics editor? Are there symbols that represent logic high / logic low? Thanks!