MicroPython Forum (Archive)

You can get eMMC chips for under $5 but stock is limited. Search eMMC at octopart.com then search by price.

On further reading of data sheet and littlefs DESIGN.md the 128 kB block erase size of the NAND flash may be a problem. I believe most of the negative comments apply to large scale flash with 300 - 10,000 cycle endurance. If you want to use SPI NOR flash use the largest affordable part and wear leve...

Embedded flash chips with wear levelling are called eMMC memory. They are over $US10 at Digi-Key. Beagle bone uses eMMC. Alternatively you could use an SPI NAND flash chip such as Winbond W25N01GVZEIG $4 100+ at Digi-Key with a wear levelling file system. Damien is porting littlefs from mbed. See #3...

If you are going to write files at high frequency (you say up to 10 per second) I strongly suggest using an SD card on the Pyboard. The STM32 flash does not have wear levelling. The largest SD card will have the longest life due to there between more sectors to share the writes. There are warnings o...

I have not had problems copying source files to Pyboard as long as you allow a short delay after a write before a hard or soft reset. The red LED comes on during write from host. Wait for it to go out before doing anything else. What will corrupt the drive is allowing writes from Micropython while c...

What about silicone roof and gutter sealer? There are many brands that are approved for potable (drinking) water. You could put the electronics in a small food grade plastic container with holes in it, then completely fill it with silicone. Make sure the wires penetrate into the silicone a good dist...

I have no trouble with Windows 10. Are you on a company domain with IT department policies enforced. I found a site where write to USB was blocked to prevent IP theft.

Does write to a thumb drive work?

A 300mV drop is most likely a semiconductor failure. One way to identify the faulty device is to look for the point of lowest voltage drop. Measure the drop across every bypass cap and IC from GND to 3V3 with your power supply connected at the power pins. Say it is 300mV at the supply pins, 295 nV a...

We use Eclipse and gdb for STM32 C debugging. I prefer Atollic TrueStudio which combines Eclipse and gdb with their own gdb server for ST-LINK and Segger J-link. It has better MCU coverage than the open source server and everything installs and works out of the box. ST now own Atollic and it's free ...

UV100, you didn't state your reason for wanting to use IAR or Keil. Is it 1) you have existing C projects you want to integrate with MicroPython, 2) you already own IAR and Keil, 3) you want an IDE with editor, compiler analysis tools and debugger. You may find it easier to build MicroPython with At...