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Sean Cross Retweeted
Sean
@xobs Cross is talking about documenting hardware. “Undocumented hardware is bad”. YEAH SING IT!#lca2019pic.twitter.com/D5yHgmAr8N
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Informal survey: How many people have tried Foboot v2.0.3 (required for Circuitpython on Fomu)? Have you had any problems? I'm going to the factory and I'm considering whether to start shipping all new units.
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Sean Cross Retweeted
Found a sample with a defect! My own rework -_- The FOMU DVT board I got from
@xobs early this year and tried to fix. Looks like I still have a short under the BGA
@tomu_im I guess I'll need to go in and fix this agin at some point. https://twitter.com/GregDavill/status/1154744365438234624?s=20 …pic.twitter.com/uPuoY0f9XK
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I'm trying to improve the performance of circuitpython-on-Fomu, and the easiest solution is to move some stuff into RAM. The question is: Which stuff? Hacky-no-profiler soltuion: break into gdb every 10 seconds, do a backtrace, and continue. Accelerate the functions in SPI flash.
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Want Python in your USB port? Try the beta of
@adafruit@CircuitPython for Fomu! Full USB support thanks to the new eptri USB port, and the awesome@tinyusb library. Binaries and instructions athttps://github.com/xobs/circuitpython/releases/tag/v0.1.1-fomu …Thanks. Twitter will use this to make your timeline better. UndoUndo -
The
#fomu pcb is super tiny, so we use a drill to remove them from their panels. Sadlyzl, a few Fomu boards decided to go exploring as the drill bit came by. It looks like someone used the "erase" brush in real life. Happily, most came out unscathed! We'll fix this next time.pic.twitter.com/SmtHZj1xVB
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Fixing the
#fomu factory test jig. Today we'll start testing and programming Fomu production units!pic.twitter.com/lD6EMB30Pn
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Just got done populating four light sensor boards. These will go in the
#fomu factory tester to make sure the rgb led is working.pic.twitter.com/l56FeNlbiH
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Some boards got damaged in transit, but I managed to recover enough for the workshop tomorrow!pic.twitter.com/2zNw3MSk6t
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I got in to Portland last night for
#teardown by@crowd_supply . I spent the week putting the finishing touches on the#fomu workshop. Come participate the workshop on Sunday and get a free Fomu EVT1 board!Thanks. Twitter will use this to make your timeline better. UndoUndo -
Of course I mean mold. That was a strange typo...
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The Fomu case samples just came in. Looking good! Now we need to harden the Tolland they'll be all ready for mass production.pic.twitter.com/bizW9popZ1
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Reworking some of the original
#fomu EVT1 boards now. They just need firmware, and a bodge to the crystal. Works just fine after that!pic.twitter.com/X48iHvgEFH
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Sean Cross Retweeted
Supercool...
@xobs took the reworked board and put it into an X-ray machine!pic.twitter.com/g0HwtL37HP
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Checking the solder connections on Fomu's ICE40UP5K to make sure it has good contact and reflow. Looking good! Xray machines are magical devices.pic.twitter.com/74LRBsaogB
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#Fomu factory test is coming along nicely! Just need to get the LED test working and it'll be finished.pic.twitter.com/6o5ly88IxG
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In 24 hours, Fomu's mass production run will start. Just got my hands on the test jig. Time to make a tester!
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After a 16-hour flight, I have gdb talking to a Rust-based gdbserver. Now to hook it up to the Wishbone bridge. This'll make it even easier to debug Fomu once it's done.pic.twitter.com/sCT05xzHMJ
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Spending a lot of time lately working on the
@tomu_im#fomu#evt board. I wrote a post discussion the rationale behind some of the decisions made around the PCB:https://xobs.io/fomu-evt-prototype-or-business-card/ …Thanks. Twitter will use this to make your timeline better. UndoUndo -
Got debugging working on the NeTV2 softcore over Ethernet. It's now possible to attach gdb over Ethernet and inspect memory, upload programs, and trace program flow on the virtual CPU inside the FPGA!
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