im-tomu / tomu-hardware Goto Github PK

The "pin 1" marker for U1 is very subtle, and multiple assembly shops have had trouble identifying it.

"pin 1" should be changed to use the more traditional "pin 1 dot", rather than the current arrangement of a broken box.

See http://docs.oshpark.com/submitting-orders/cutouts-and-slots/

Currently the slot doesn't work;

Something with spring-loaded contacts / pogo pins....

And probably update the release.sh script too.

Makes it easy for people to open older versions.

See branch https://github.com/im-tomu/tomu-hardware/tree/kl27-qfn32

This thing ->

The README lists "1 x Capacitor >10uF 0402" under "individual parts". In the other BOM documents and links presumably the same part is listed as 4.7uF.

@shenki was doing something here....

Test that the LEUART can be used on the UART pins.

The /RESET pin (pin 7 of the MCU) is not made available. This is an issue when working on the bootloader.

Ordinarily, the system relies on being able to send a JTAG reset. This is fine if the MCU isn't locked up. However, if the MCU crashes then it is impossible to reattach gdb without a reset.

In order to develop on the bootloader itself, /RESET should be brought out to a pad.

I see that all of the components listed here are ROHS compliant (awesome!), but is the solder you use ROHS compliant as well? Also, are there plans to get tomu ROHS-certified? Keep up the good work!

Test that the CPU can be debugged via the ARM SWD pins using OpenOCD and GDB.

As it states there's a way to store data inside tomu?

No details provided, my guess is the STL fails the manifold check.

I was having a look to see what is brought out from the EFM32HG309 on the back of the board, and so my first port of call was /docs/tomu.pdf. But this shows the logical layout. There's also no indication about which version of the board it applies to.

What would help is if there were pictures/diagrams of the actual, physical layout of the board, pointing to what each pad corresponds to on the EFM32HG309.

This would help people who are less skilled with electronics to know what they're wiring on to.

I think what it is:

• The 4 pads on the top labelled with "D" and "C" are the debug interface, and, from left to right:
  1. 3.3v
  2. SWDIO
  3. SWDCLK
  4. Ground (square)
• The 4 pads on the bottom, labelled with "T" and "R" are the (Low Energy) UART interface, and, from left to right:
  1. 3.3v
  2. PB13 / LEU0_TX
  3. PB14 / LEU0_RX
  4. Ground (square)
• The four contacts on the left edge are the touch-sensitive pins, not sure what is connected to what there, but could also be repurposed for analogue or digital I/O.

https://www.seeedstudio.com/fusion.html

Something like the http://altusmetrum.org/ChaosKey/

Is possible create a small enclosure for tomu, qomu etc. for runing ruby, python or one program?
similar https://hackaday.com/2021/01/07/building-a-pocket-sized-python-playground/ or https://hackaday.io/project/169103-low-power-esp32-handheld

Simple: power (meybe solar too, AA), screen, some buttons, removable tomu.
I can writing a program but im not electronic ;-(
Simple, fast run device for mass

http://dirtypcbs.com/