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| author | Rob Austein <sra@hactrn.net> | 2021-02-14 16:01:15 +0000 |
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| committer | Rob Austein <sra@hactrn.net> | 2021-02-14 16:01:15 +0000 |
| commit | e18e5b3d2559f5f0395ffe79416cdca3abc89310 (patch) | |
| tree | 340bdc43c4bfa7bcc3c048eea4db848cabe470de /markdown/DevBridgeBoard.md | |
| parent | ad1cc0517983e599897929b4c94463bf2af78f7c (diff) | |
Start restructuring for Pelican
Diffstat (limited to 'markdown/DevBridgeBoard.md')
| -rw-r--r-- | markdown/DevBridgeBoard.md | 40 |
1 files changed, 0 insertions, 40 deletions
diff --git a/markdown/DevBridgeBoard.md b/markdown/DevBridgeBoard.md deleted file mode 100644 index 41a12c4..0000000 --- a/markdown/DevBridgeBoard.md +++ /dev/null @@ -1,40 +0,0 @@ -[[PageOutline]] - -# dev-bridge board -In the process of developing the [wiki:AlphaBoardComponents] design, the project has made what is known as the "dev-bridge board". - -This is a board, 100x70 mm, with about 2/3 of the components intended to be on the Alpha design. What is missing is basically the FPGA and it's supporting circuits. - -To date, the dev-bridge board has been used to implement and validate the FMC based interface that will be used to connect the ARM and the FPGA on the Alpha. - -Schematics and layouts are at [user/ft/stm32-dev-bridge/hardware/rev01](https://wiki.cryptech.is/browser/user/ft/stm32-dev-bridge/hardware/rev01). - -High resolution pictures of rev01 of the dev-bridge board are attached at the bottom of this page, but the following should be more than sufficient to read the silkscreens. - -<img src="dev-bridge_rev01_front_medium.jpg"> - -<img src="dev-bridge_rev01_back_medium.jpg"> - -Here is the board mounted on the Novena, attached to the programmer: - -<img src="IMG_9983s.jpg"> - -Note that it's rather bigger than the Netgear enclosure I use to transport the Novena. (Not only does it protect the board, but I have this superstition that TSA is more comfortable with a home gateway than a bare motherboard.) - -Also note that the dev-bridge board is connected to the Novena by the -high-speed expansion connector, which forms a bit of a pivot point. -As Pavel says, "High speed and mechanical reliability are not very good -friends usually." - -For that reason, I highly recommend stabilizing the board by bolting it to -the Novena with a 5mm spacer. There are two through-holes that line up -with mounting holes on the Novena, one at the corner and one next to the -wifi connector. I've found that even one bolt is enough to stabilize the -board. - -Finally note that the board traces come rather close to the through-holes, so -you want to avoid scraping them with the bolt head or the nut. I happen to -be using a countersink-head bolt, which is beveled toward the shaft, but -it's probably even better to use a nylon washer. - -All the software, as well as flashing instructions, are at [wiki:GitRepositories/sw/stm32]. |