Commit 05ae9e7c authored by Jake Read's avatar Jake Read
Browse files

cleanup and doc

parent c490f03b
## Rev 0.1
Looks like this is done. I've mentally triple checked my tx/rx ports wiring. Feeling find about the way this turns out: do two 'ports' on motherboard / most boards. Ports should be software selectable to be either sync or data devices... This way, the hardware is there if we implement hardcore syncing, and if we just source clocks (as seems likely) we just have an extra port. The router will just implement all 5 sercoms ... are there 6? Current router implements 0-1-(x)-3-4-5 ... so SER2 is ... ? RX on SERx-2, TX on SERx-0... by all means SER2 looks open, could do. So 6 ports is 3 motors fully synced on one router, 6 motors clock-source synced. SER7 appears to kick as well... but not available on build. OK. 6.
## Notes
The point is that specialization is rad, so specialized circuits make sense. So this 'motherboard / dboard' thing is kind of confusing. You have a lot of repeating elements, though, so PNP'ing some header modules also makes sense. economies of scale are damning. however, these should be baked on to other circuits: again: the castellated mod here makes sense (or version w/ solder-able-on-headers, like a regular old devboard).
## Connector Notes
SAM14005CT-ND 2x10 Conn is 3.66mm Tall,
With 2.54mm insulation on pins, for 6.2mm ... so use
WURTH M3 Unthreaded 7mm BBH 732-7109-1-ND (beneath)
WURTH M3 Unthreaded 3mm BBH 732-7087-1-ND (above)
## (old) Parts Bits
WURTH M3 Threaded 7mm Tall 732-5274-1-ND
WURTH M3 Unthreaded 10mm Tall 732-7119-1-ND
2x10 0.1" 15.75mm x 2.8mm SAM1066-10-ND‎
2x10 0.1" 15.75mm x 5.84mm S2061E-10-ND‎
2x10 0.1" thru-headers 609-4473-1-ND (amphenol 7mm) or 952-2359-ND (harwin 7.5mm)
0805 10uH Inductor 445-6762-1-ND
RCT XC1617CT-ND (and find 12.5pF 0603)
16pF 0603 ‎1276-2204-1-ND‎
TXRX LTC2855CDE#TRPBFCT-ND
# ATSAMD51 Motherboard
# Module Board for the ATSAMD51
Board OK, needs revision for networking PHY mishap.
![board](moduleboard-atsamd51/motherboard.jpg)
![board](motherboard.jpg)
![schematic](moduleboard-atsamd51/schematic.png)
![schematic](schematic.png)
![routed](routed.png)
![routed](moduleboard-atsamd51/routed.png)
To crib arduino pinouts from Adafruit's M4 interpretation, do:
![adaschem](arduino_compatibles_schem.png)
## Notes
- well! the biggest err here is of course your output wiring on the RJ45
- qfn pad should reflect real qfn gnd pad size, and silk, etc
- when panelizing, the rj connector butts against the usb connector, which needs to hang over the edge somewhat. for now I can just skip placing the middle row, but the next design should perhaps recess the usb connector somewhat
- the reset button could use an easier smash,
- and could be paired with a 'reset' and a 'rebootstrap' button, for live systems?
- arduino / usb implementation *doth* require that 32khz xtal, put it on the front face then ... also nice: bootloader neopixel, neopixel in general ... maybe pair out some of the bfpp
## Connector Notes
![adaschem](reference/arduino_compatibles_schem.png)
- black 7.5mm connectors on top of motherboards, with 10mm posts. then header soldered with 2.5mm insulation beneath power board,
- daughters get 7mm gray babies and 7mm threads, or 8mm thru-holes and also-std black headers, to finish in an m3 insert in a plastic housing somewhere below ... i.e everything should get these ? stick 2 it, and make housings for circuits, I guess
To program / use see [ponyo](https://gitlab.cba.mit.edu/squidworks/ponyo) and [SAMD51 notes](https://gitlab.cba.mit.edu/pub/hello-world/atsamd51).
## Parts Bits
## Module Board v0.11
WURTH M3 Threaded 7mm Tall 732-5274-1-ND
WURTH M3 Unthreaded 10mm Tall 732-7119-1-ND
2x10 0.1" 15.75mm x 2.8mm SAM1066-10-ND‎
2x10 0.1" 15.75mm x 5.84mm S2061E-10-ND‎
2x10 0.1" thru-headers 609-4473-1-ND (amphenol 7mm) or 952-2359-ND (harwin 7.5mm)
0805 10uH Inductor 445-6762-1-ND
RCT XC1617CT-ND (and find 12.5pF 0603)
16pF 0603 ‎1276-2204-1-ND‎
TXRX LTC2855CDE#TRPBFCT-ND
For incremental revision, I (so far) only have a few notes:
- the tag-connect requiring holes drilled in daughters isn't *awesome* but is also *fine*
- vias-in-pad that aren't plugged can lead to tombstoning of 0402s. can combat with (1) money and plugged vias or (2) smaller drill (min 0.2?) and vias moved off of pads
- 'smash' silk was out of place
- seek the alchemist
- 'module board' not 'mothermodule'
- panelization hole sizes: more smaller holes, smaller space between
5x steppers 1x router
Ideally, at the next revision we are doing circuit assembly elsewhere. Before: should wake up a full-pin-test led board and check that all routed lines are OK.
digikey is https://www.digikey.com/short/ppj2wq
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