MicroPython Forum (Archive)

I should add a bit of advice: if you want to set up your pyboard to fall back to an external power supply when USB is disconnected, you can use something called a "Diode-OR" circuit. Half of the diode-OR is already there; this is D1 which allows current to flow from USB VBUS to Vin, but not the othe...

Hi, Does anyone know if there is a problem having both the USB cable and a Vin connected simultaneously? I tried it briefly and smelled smoke! Thanks, Bob Smoke is usually an indication of a problem, and in this case, sadly unsurprising :( The question now is where the smoke came from, and I can of...

I'm having second thoughts about creating a public mp_stream_read function from the existing stream_read. What I need is to copy data from an open stream or file object into a pre-allocated array in C. stream_read is written to return a python string object, if I use that then I would need to go thr...

Okay, thanks. I take it that the reason we don't have it yet is that it hasn't been needed. As I understand it, he have 'mp_stream_write()' as the publicly available function, which is wrapped inside of 'stream_write_method()', and this is what gets linked to mp_stream_write_obj. Creating a parallel...

I'm going over the code for reading from and writing to a file / stream in my I2S driver, trying to clean it up and make it more consistent. While writing the code, I implemented file reading / I2S playback first; the following snippet was adapted from very similar code in 'py/stream.c': pyb_i2s_obj...

The difference in numbering is between the WiPy binary release and the current release tag for the overall MicroPython project. The WiPy is much newer, and tagging more frequent releases as issues are getting fixed; don't worry about the version numbers not tracking at this point. If you aren't plan...

@neilh20 - That is very encouraging; I wouldn't feel up to trying to tackle it myself. I can say that I'll have an application for it whenever it is ready!

@dhylands - Thanks for the link, I had forgotten that discussion about getting USB Host mode up on the pyboard.

-Bryan

@neilh20 - Since you are working on USB Host CDC, is there any chance you are interested in Host MSC as well? This would be to allow the OTG Host to access the filesystem on a USB flash drive. I'm interested in this because of the work I am doing on I2S (Inter-IC-Sound). Audio files tend to be large...

I was wondering if anyone was running or thinking about running MicroPython on the Olimex STM32-E407 dev board. I have a potential consulting project coming up; the customer is currently planning to use this board as their embedded controller, and I may assist with system integration and firmware de...

There was a productive discussion about a proposed API for I2C and SPI slave modes starting here: https://github.com/micropython/micropython/issues/1430#issuecomment-151321274 It would probably be good to open a new issue specifically for that so the details don't get lost at the bottom of a _very_ ...