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Custom board based on Pyboard
Posted: Tue Mar 15, 2016 6:48 am
by rickygee
Saw article in Electronics magazine re micropython. At 67 wondered if it was worth the struggle, despite still being commercially active in developing micro projects using 8 bit AVR and BASCOM. So, did my own micropython board, copy of ver1.1, with added USB port (FT230X) on uart6, coin cell, thru hole USB connectors (I have ripped off SMD parts), slightly larger at 50x60mm. All my engineering apps are long time Windows, so VMwared Ubuntu, installed rshell, first experience using Linux, interesting. So now I am all go, just have to learn Python! Always wanted too, best way always seemed to be to have a project in mind. Thanks to the team who did all the work, great effort. I had to traverse a lot of posts and articles, scattered rather widely, to get things to where they are, has been a steep learning curve. I am encouraging a researcher locally to have a look at mP, he is a Python fan, and will give him one of my boards, once again, great work, cheers, Richard
Moderator note: original topic was titled "Getting there", but changed to reflect contents.
Re: Getting there
Posted: Tue Mar 15, 2016 11:19 am
by Damien
rickygee wrote:So, did my own micropython board, copy of ver1.1, with added USB port (FT230X) on uart6, coin cell, thru hole USB connectors (I have ripped off SMD parts), slightly larger at 50x60mm.
Sounds like you had a lot of fun! Do you have pics of the board that you made? I'd be interested to see it!
Re: Getting there
Posted: Wed Mar 16, 2016 4:19 am
by rickygee
https://www.dropbox.com/s/gow8rszydevmf ... w.jpg?dl=0
https://www.dropbox.com/s/gdih02mysttrl ... w.jpg?dl=0
Moderator Note: I changed the img tags to url tags, since as img tags they were showing up as broken images.
Cheers,
Richard
Re: Getting there
Posted: Wed Mar 16, 2016 12:24 pm
by Damien
Thanks Richard!
Re: Custom board based on Pyboard
Posted: Wed Mar 16, 2016 4:10 pm
by Roberthh
Hello Richard,
that looks very professionally made.
Re: Custom board based on Pyboard
Posted: Wed Mar 16, 2016 10:29 pm
by rickygee
I design and hand assemble boards like this regularly,
cheers,
Richard
Re: Custom board based on Pyboard
Posted: Thu May 19, 2016 6:23 am
by HarryOz
What is the process to do a custom board, I would like to spin up my own board aswell, however do not want to custom port the firmware. Is it possible to program a smaller sized STMicro?
Re: Custom board based on Pyboard
Posted: Thu May 19, 2016 6:35 am
by dhylands
Well, you need to design the board.
And then you'll need all of the equipment to assemble the board once you get your PCB back.
And you'll need to create a board definition file (which is like the ones in stmhla/boards.
Here's a board based on the STM32F401 that my brother and I designed:
https://3.bp.blogspot.com/-T8M9Qh5NHuQ/ ... 224238.jpg
http://blog.huv.com/2016/01/roz-power-board.html
Re: Custom board based on Pyboard
Posted: Thu May 19, 2016 12:40 pm
by HarryOz
What did you use to program the micro? Can you shed some light on that?
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Re: Custom board based on Pyboard
Posted: Thu May 19, 2016 5:39 pm
by dhylands
The same way its done on the pyboard.
The STM32 series have builtin bootloaders. So if you expose a DFU capable USB connector (some of the chips have multiple USB ports and only support DFU on one).
There are also bootloaders for UART, I2C, CAN, and SPI as well. If none of those are available, you can expose the JTAG or SWD pins and use the SWD programmer that comes with any of the discovery or nucleo boards (or some other standalone programmer).
