MicroPython Forum (Archive)

Yes, this is expected behaviour. Currently, you're not allowed to allocate memory inside an interrupt callback. Unfortunately, doing any type of floating point requires allocating a float. If you also execute: import micropython micropython.alloc_emergency_exception_buf(100) then you'll get more det...

It would probably be possible to put a read-only filesystem at the end of flash (or somewhere in flash).

We can't make it writable since we don't have enough RAM to rewrite the flash pages.

Currently, the internal flash size is 112K. This number is based on the nature of flash and the block sizes available. The flash is laid out as: 4 x 16K blocks 1 x 64K block 7 x 128K blocks The first of the 16K blocks is where the reset and interrupt vectors are located. The remaining 3 x 16 and 1 x...

I think that its currently not possible to subclass builtin classes.

There is already an issue in github: https://github.com/micropython/micropython/issues/664

I think for the short term, you probably need to use membership rather than inheritance.

Hello! I think I'll introduce myself first, my name is Cooper and I am engineering graduate with an interest in python and and microcontrollers. I have a few questions about the board: 1) Is it possible to boost the speed of the ADC? Our experiments seem to indicate a speed of around 46kHz but the ...

I didn't see this mentioned, so I figured its worth being explicit. You'll want to connect the TX pin from the HC05 to the RX pin on the pyboard, and the RX pin from the HC05 to the TX pin on the pyboard. You'll also need to connect GND from the HC05 to ground on the pyboard. And if you're plugged i...

You can reset the file system by following the procedure under "Boot Modes on this page: http://micropython.org/doc/general You want the Green and Orange LED together. You may want to try it by plugging the pyboard into a USB charger. Then once you've reset the filesystem, unplug it from the charger...

I also have some code over here: https://github.com/dhylands/python_lcd/tree/master/lcd It supports 4-bit and 8-bit, as well as some of the I2C based LCD backpacks. The lcd.py is the generic code. The pyb_gpio_lcd.py and pyb_i2c_lcd.py create classes derived from LcdApi that takes care of actually t...

@blmorris: There is a pyb.bootloader() command so that you don't even need the DFU jumper any more (except in rare cases).

Great info and search terms, including Dan's pic18_serial_io project, thanks to you both. Suppose I make a virtual serial link from pyboard USB port to RPi USB (i.e. without FTDI interface). AIUI I would program the pyboard to boot in CDC+MSC mode, run a 'main' script to sample sensors on a timer i...