BenF 3.x FW on new LCD driver devices [flick. screen solved]

[lavoie.michel]

@rimidalv007

I fixed bugs detected in my first version of patch.

Detected and fixed bugs:

1. Bug in export to SD card - fixed
2. Bug in setting of grid intensity option - fixed

Patched firmware is in attachment.

Enjoy!

I too wanted to thank you for your work, you have given meaning to my up-to-now useless Nano!

The source would be awesome, but still thanks for your work!