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| m_w | anyone around to do a schematic review on the latchup badge? | 04:56 |
|---|---|---|
| m_w | it is pretty much done just need a review before I send it off for fab | 04:57 |
| m_w | the review is not super critical because we aren't populating them but I rather it be a functional design | 05:15 |
| tnt | m_w: sure | 05:45 |
| m_w | tnt: hey | 05:59 |
| m_w | tnt: you have kicad or would you prefer a schematic in pdf form? | 05:59 |
| tnt | I have kicad 5.0.x | 06:01 |
| m_w | okay lemme push what I have now | 06:02 |
| m_w | https://github.com/mwelling/latchup-badge | 06:04 |
| tpb | Title: GitHub - mwelling/latchup-badge: ICE40 Badge for Latch-Up 2019 (at github.com) | 06:04 |
| m_w | I might add a few buttons and an RGB LED but I am more worried about whether I have enough broken out for initial programming | 06:05 |
| m_w | went all meta and put part of the schematic on the silkscreen | 06:06 |
| tnt | m_w: schematics looks fine. | 06:24 |
| tnt | m_w: I might connected the WP & HLD pin of the flash to fpga pins to allow QSPI operation. | 06:25 |
| m_w | tnt: cool any gripes on the pcb layout? | 06:25 |
| m_w | not really a fan of the long antenna that the programming header makes | 06:26 |
| tnt | yeah, the trace you have on the back really split the gnd plane ... | 06:28 |
| tnt | I would just do 'short jumps' where needed and route most of them on the top. | 06:29 |
| tnt | err swap top/bottom in what I said (since most of the stuff is on the bottom) | 06:29 |
| m_w | I can jump CRESET and CDONE to open up the plane a bit | 06:30 |
| m_w | moar GND = better | 06:31 |
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| m_w | tnt: pull the lastest and see if that looks better | 06:38 |
| Xobs | m_w: Are you sure you got D0/D1 wired the right way around on the SPI? | 06:40 |
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| m_w | Xobs: err maybe | 06:43 |
| tnt | Xobs: It seemed correct to me. did you notice an error ? | 06:46 |
| m_w | IO0 goes to ICE_SO and I01 goes to ICE_SI | 06:47 |
| m_w | checks against fomu and icebreaker | 06:48 |
| Xobs | Sorry, the ICE40 naming convention always throws me. You're right. | 06:48 |
| tnt | That's what I thought I did. | 06:48 |
| tnt | flash pin 5 to ice40 pin 14 | 06:49 |
| Xobs | The naming always throws me. SPI_SO is MOSI, and SPI_SI is MISO. The ICE40 pin name is backwards from what I normally think of. | 06:49 |
| m_w | so adding the IO2-IO3 for xip might be a good idea? | 06:50 |
| Xobs | m_w: Yes, definitely wire up IO2-IO3. It's easy and free. | 06:50 |
| Xobs | And the latest Foboot should support that now. | 06:50 |
| m_w | and RGB maybe some buttons? | 06:50 |
| m_w | I think these will be my last changes before tomorrow morning | 06:51 |
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| m_w | got the RGB LED in | 07:28 |
| m_w | next up buttons | 07:28 |
| m_w | tnt: Xobs: I pushed the final changes and it is ready for the last approval | 07:59 |
| m_w | let me know if I f'd something up | 07:59 |
| Xobs | m_w: I enjoy the amount of decoupling you have on there :) | 08:05 |
| Xobs | You still have the notes in the lower-right corner of the schematic. | 08:05 |
| m_w | Xobs: doh! | 08:06 |
| m_w | last call | 08:10 |
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| m_w | sent to the fab, thanks for the help | 08:51 |
| Xobs | Hooray! | 09:07 |
| Xobs | And I'm looking forward to getting many more people testing Foboot. | 09:08 |
| Xobs | I'm getting ready to send stuff for mass production. | 09:08 |
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| xobs | there, matrix is starting to come backup | 14:56 |
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