MicroPython Forum (Archive)

I was trying to adapt https://github.com/Scondo/purepng to micropython. https://github.com/Ratfink/micropython- ... ter/png.py works only partly. It doesn't allow you to write png file.
Thanks,

When trying to load purepng "python" library in arduino nano rp2040 connect i am getting the following error.
>>> import png
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
MemoryError: memory allocation failed, allocating 1016 bytes
>>>
Any ideas? How to fix this?

You didn't answer my question "Where does your graphic data come from?". Depending upon your application, it might be sufficient to write files using a simpler format (TIFF, GIF) or render the PNG files elsewhere (e.g. in a web browser). How can i write files in tiff / gif format. Is there a librar...

In my case I want to read png file from onboard storage, run some image processing algorithms and write the output back to onboard storage as png file. Then view the output png from pc.

I haven't tried that. But why would the author comment it out if it works good.

I want to read / write png files from flash storage. i am able to read png files with https://github.com/Ratfink/micropython- ... ter/png.py but that library does not allow me to write png files.

Is there any way to read / write png files with micropython?

Thanks. Now i can successfully build micropython for nano rp2040 connect.

Previous error seems to be fixed. But now i am getting the following error. inspiron3000@inspiron3000-Inspiron-14-3467:~/micropython/ports/rp2$ make BOARD=ARDUINO_NANO_RP2040_CONNECT [ -e build-ARDUINO_NANO_RP2040_CONNECT/CMakeCache.txt ] || cmake -S . -B build-ARDUINO_NANO_RP2040_CONNECT -DPICO_BUI...

I am getting the following error msg when i try to build micropython for nano rp2040 connect. inspiron3000@inspiron3000-Inspiron-14-3467:~/micropython/ports/rp2$ make BOARD=ARDUINO_NANO_RP2040_CONNECT [ -e build-ARDUINO_NANO_RP2040_CONNECT/CMakeCache.txt ] || cmake -S . -B build-ARDUINO_NANO_RP2040_...