Search found 55 matches

by mathieu
Sun Apr 11, 2021 5:30 pm
Forum: MicroPython pyboard
Topic: Reading multiples waves files in the same time
Replies: 3
Views: 171

Re: Reading multiples waves files in the same time

To expand on pythoncoder's answer, I think the real hard part here would be to read "on the fly" or to store in memory 20 mn of non-repeating music, at a reasonably good sounding bitrate. If a lot of the audio is repeated (e.g. mixing single-tone piano notes with short percussion clips and one or mo...
by mathieu
Sun Feb 21, 2021 4:19 pm
Forum: General Discussion and Questions
Topic: Starting coding
Replies: 5
Views: 437

Re: Starting coding

Excellent question: as the parent of a 9-year-old I've been curious about these lego/micropython bricks for a while now, but from reading official descriptions it was never entirely clear how this differs (or not) from a lego-less microcontroller. So I'm also interested in a good place to learn more...
by mathieu
Mon Feb 08, 2021 8:24 am
Forum: Pyboard D-series
Topic: Elegant Physical Config for Pyboard D
Replies: 17
Views: 1871

Re: Elegant Physical Config for Pyboard D

I've always been amazed that it's possible to align the wbus connectors with the required degree of precision. Two comments: first, the WBUS pads are only 200 microns wide, so a reasonable visual alignment (using a binocular scope) is likely to be good to 20 microns or better, which is really not t...
by mathieu
Sun Feb 07, 2021 12:37 pm
Forum: Pyboard D-series
Topic: Elegant Physical Config for Pyboard D
Replies: 17
Views: 1871

Re: Elegant Physical Config for Pyboard D

Hi all, I understand Peter's reluctance to design a DIP32 based on the WBUS connectors, but in case someone finds it useful, here's my attempt at something like that: https://github.com/mdaeron/pybd-breakout . The soldering wasn't too hard using low-temperature solder paste, an adjustable heating pl...
by mathieu
Thu Jan 21, 2021 7:15 pm
Forum: MicroPython pyboard
Topic: How a pyboard can request the runnig of a program on a computer ?
Replies: 3
Views: 339

Re: How a pyboard can request the runnig of a program on a computer ?

This is a very non-specific answer, but you could look at pyb.USB_VCP() and set up some flavor of two-way communication between the host computer and the pyboard.

https://docs.micropython.org/en/latest/ ... B_VCP.html
by mathieu
Mon Jan 11, 2021 9:18 pm
Forum: Pyboard D-series
Topic: Unable to write numpy arrays to '.txt' or '.DAP' files on SD
Replies: 5
Views: 804

Re: Unable to write numpy arrays to '.txt' or '.DAP' files on SD

monquarter wrote:
Mon Jan 11, 2021 5:20 pm
This won't give you an error, however it doesn't function properly. I think there may be a bug in the .tobytes() file as the lenght of the array is off by a factor of 8 (the size of float object).
You could try again, this bug was just fixed a couple of hours ago.
by mathieu
Tue Dec 29, 2020 9:53 pm
Forum: ESP32 boards
Topic: Class for stepper motor driven by Easy Driver
Replies: 4
Views: 363

Re: Class for stepper motor driven by Easy Driver

By the way, I've been playing with the EasyDriver recently (but managed to fry one), as well as this one: https://www.pololu.com/product/2966 . Does anybody have an idea of what differences exist between these two options? The second one is cheaper and smaller, what would I be getting by opting for ...
by mathieu
Mon Dec 28, 2020 9:29 pm
Forum: ESP32 boards
Topic: Class for stepper motor driven by Easy Driver
Replies: 4
Views: 363

Re: Class for stepper motor driven by Easy Driver

Did you try replacing

Code: Select all

self.stp = step_pin
by

Code: Select all

self.stp = machine.Pin(step_pin)
or something like that?
by mathieu
Fri Dec 18, 2020 9:28 pm
Forum: Programs, Libraries and Tools
Topic: Timers and/or uasyncio
Replies: 7
Views: 793

Re: Timers and/or uasyncio

Thanks again Peter. I only very recently started to experiment with at asynchronous coding, so this is helpful. I'll be trying to implement all I need without timers, if only as a learning experience. In case anybody is interested, I'm a stable isotope geochemist and this project aims to design from...
by mathieu
Fri Dec 18, 2020 1:48 pm
Forum: Programs, Libraries and Tools
Topic: Timers and/or uasyncio
Replies: 7
Views: 793

Re: Timers and/or uasyncio

Thanks Peter for pointing me to that. I'm trying to make this work but my UART device (MKS 910 pressure/vacuum gauge) seems to communicate without ever using newlines: all communications are of the form "@254_;FF", with the underscore replaced with the actual content of the message. I tried calling ...