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oe1cxw's profile
Claire Xen 🏳️‍⚧️🏳️‍🌈🧙🏻‍♀️ BLM 🏴🚩
Claire Xen 🏳️‍⚧️🏳️‍🌈🧙🏻‍♀️ BLM 🏴🚩
Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩
@oe1cxw

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Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩

@oe1cxw

Neurodiverse trans geek girl. Yosys, RISC-V, SAT/SMT.

She/her/hers
clairexen.net
Joined September 2014

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    1. Luke Valenty‏ @TinyFPGA 5 Apr 2018
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      Working on getting picorv32 running with quad SPI on the TinyFPGA BXpic.twitter.com/TgERYtNgNO

      3 replies 8 retweets 39 likes
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    2. Luke Valenty‏ @TinyFPGA 5 Apr 2018
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      Just got it working. Was a little bit of work to change the reset vector from 0x100000 to 0x50000, but now its done. Time to check the dual and quad spi modes.pic.twitter.com/QDAWZNEOyo

      2 replies 0 retweets 4 likes
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    3. Luke Valenty‏ @TinyFPGA 5 Apr 2018
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      Hmm...no dice. Need to double check the SPI commands used. The flash used on the BX supports dual and quad SPI, but maybe the commands are different than what picosoc uses. Time to debug.

      1 reply 0 retweets 3 likes
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    4. Luke Valenty‏ @TinyFPGA 5 Apr 2018
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      I got Dual I/O working by forcing dummy cycles to '0'. According to the datasheet the flash requires no dummy cycles for dual I/O. Still no luck on quad I/O, should work soon though. https://datasheet.octopart.com/AT25SF081-SSHD-B-Adesto-Technologies-datasheet-31984108.pdf …pic.twitter.com/gp0maVQ7mA

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    5. Luke Valenty‏ @TinyFPGA 5 Apr 2018
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      I’ll have to hook up a logic analyzer to see what’s going on with quad SPI mode. Every time I try to switch to quad SPI it crashes. I suspected it has something to do with the dummy cycles but no value made a difference.

      2 replies 0 retweets 3 likes
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    6. Luke Valenty‏ @TinyFPGA 5 Apr 2018
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      Might try something fun like adding VGA to picosoc in the meantime.

      2 replies 1 retweet 5 likes
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    7. Luke Valenty‏ @TinyFPGA 6 Apr 2018
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      @oe1cxw: what’s a known good SPI flash chip to use with the SPI XIP in picosoc?

      1 reply 0 retweets 0 likes
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      Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 6 Apr 2018
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      Replying to @TinyFPGA

      The one on the icebreaker board should be good. cc @esden

      1:55 PM - 6 Apr 2018
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      • Dave 🏳️‍🌈 Luke Valenty Piotr Esden-Tempski @esden@chaos.social
      0 replies 0 retweets 3 likes

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