clifford changed the topic of #yosys to: Yosys Open SYnthesis Suite: http://www.clifford.at/yosys/ -- Channel Logs: https://irclog.whitequark.org/yosys
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<bwidawsk> ZipCPU› I actually have been trying with the lattice programmer, and no joy - which was why I wanted to try the open tools :-)
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<ZipCPU> chaseemory: ;)
<ZipCPU> bwidawsk: You mean the iCE40 1k stick?
* ZipCPU just finished showing 101 Dalmations to his kids
* ZipCPU googles ECP5 evaluation board
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<bwidawsk> ZipCPU› no, the ECP5 EVN
* ZipCPU googles the ECP5 evaluation board
<ZipCPU> Looks like it has a QSPI flash on board, no?
<bwidawsk> what's the 'Q'?
<bwidawsk> mine has a macronix part
<bwidawsk> 16pin SPI
<ZipCPU> "Quad" SPI. It takes the MISO/MOSI/WP and HOLD pins and turns them all into bidirectional data
<ZipCPU> Oh, 16pin SPI?
<bwidawsk> well, spi is 1 pin, but the actual chip is 16
* ZipCPU googles some more
<ZipCPU> Out of curiosity, what are your goals with the flash? Just initial startup configuration?
<bwidawsk> oh, I didn't notice the special programming instructions
<bwidawsk> so at this point, I'm just trying to compare open vs. proprietary tools
<ZipCPU> The data sheet I'm looking at, FPGA-EB-02017-1-0-ECCP5-Evaluation-Board.pdf shows a QSPI flash, with all the standard pins
<bwidawsk> you have a link for that one handy?
<ZipCPU> Sure, one moment
<tpb> Title: ECP5 Evaluation Board - Lattice Semiconductor (at www.latticesemi.com)
<ZipCPU> I'm looking at the user guide, https://www.latticesemi.com/view_document?document_id=52479
<ZipCPU> ... and I'm on page 25
<bwidawsk> ZipCPU› hmm, maybe the other pins are grounded
<ZipCPU> If you look at page 39, it shows a 16 pin flash, of which only 6 are used
<ZipCPU> Some are grounded, some are test points
<bwidawsk> yeah, okay, I hadn't dug that deeply
<ZipCPU> I've written about how to build a QSPI flash controller that's highly configurable, yet very low logic
<ZipCPU> The basic approach works nicely for dual SPI as well (strapped MISO+MOSI together for bidirectional data lines)
<ZipCPU> While I have a regular SPI flash controller, it's not quite so configurable
<bwidawsk> so... I was under the impression that I can program this flash with jtag, and then on subsequent boot, the bitstream would be loaded into the fpga?
<ZipCPU> Yeah, that's usually how this sort of thing works. I usually load my design via JTAG, and the program the flash through the design, but I'm probably just strange that way
<ZipCPU> *then program
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<bwidawsk> well, if you know what you're doing, that's probably much faster
<bwidawsk> I'm not sure if I need any straps, or something set to make it load from the SPI, but nothing seems to work for me
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<bwidawsk> for whatever it's worth, I spent 3 days struggling with diamond and flexlm to get the blinky to work, and symbiflow/trellis worked within 30 seconds
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<ZipCPU> straps? "I'm not sure if I need any straps" I'm not sure what you are referring to there
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<bwidawsk> ZipCPU› sorry, I was half awake. Was referring to any shunts, or switches on the board
<ZipCPU> ;) By the time you wrote it, I was already snoring
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