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| author | jaseg <git@jaseg.net> | 2018-07-17 15:43:26 +0200 |
|---|---|---|
| committer | jaseg <git@jaseg.net> | 2018-07-17 15:43:26 +0200 |
| commit | 6df66b77ba5b27bce5630694742f2dac57b8d3eb (patch) | |
| tree | fc14370fdea41b6d7a672758aa89886b9107f78c /hw1/README | |
| parent | 90ce052d82daa86e1e86ab4dac7fbba0cdda8680 (diff) | |
| download | olsndot-6df66b77ba5b27bce5630694742f2dac57b8d3eb.tar.gz olsndot-6df66b77ba5b27bce5630694742f2dac57b8d3eb.tar.bz2 olsndot-6df66b77ba5b27bce5630694742f2dac57b8d3eb.zip | |
Isolate usb-serial-rs485 tree
Diffstat (limited to 'hw1/README')
| -rw-r--r-- | hw1/README | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/hw1/README b/hw1/README deleted file mode 100644 index 9ac2b15..0000000 --- a/hw1/README +++ /dev/null @@ -1,23 +0,0 @@ -This is a board designed to receive nucleo64 (and maybe 32) boards -to be test TARGETS. The stm32l1 on _this_ board is reprogrammed via -one of the debug connectors, with appropriate software to be -master/slave/etc to correspond with the DUT. All (most) communication -lines between the two boards are tapped to a 10 pin connector matching -cheap FX2based logic analysers, allowing automatic tests to be written -that use sigrok to check that the signals on the wire match expectations. - - -Notes on assembly hw1-a: -* 16Mhz crystal, 15pf load caps, and 3k7 i2c pullups - (why don't I have 4k7 0603 resistors lying around? who knows!) -* A power LED wouldn't hurt. -* Adding a red/green user led wouldn't hurt for test pass/fail, even though - it's meant to be autotest -* maybe a fet to turn on/off the i2c pull ups programatically? - (maybe just a single jumper? is there really any need for individual control - of the pullups?) -* move stlink connector 90° or just down and tuck it in, so we can pull the - edge in. It overlaps the buttons on the nucleos, and requires longer - pins than necessary otherwise. -* Add some ground pads for test points, just in general. Test points good, - more test points better. |