M5Paper : Usage of canvas.setTextColor() to define different grey scales.

zitrone

Hi,
I have a basic question arising from lack of examples.

I am referring to
https://docs.m5stack.com/en/api/m5paper/epd_canvas
in order to set different grey scales for text on a canvas.

I tried values from 0 to 15, 0x00, 0x0F, 0xFF and so on and found only 3 grey shades working.
Can someone please specify which are the different values to be passed in as the first argument to canvas.setTextColor() in order to achieve the 16 different grey scale variants?

Thanks,
Zitrone

felmue

Hello @zitrone

the number of gray scales depends on the refresh mode used. For instance UPDATE_MODE_DU4 has 4 whereas UPDATE_MODE_GC16 has 16. Check out the description at the beginning of this file.

Thanks
Felix

zitrone

@felmue Thank you for the explanation and the link :)