Not too long ago I purchased a 32x32 RGB Matrix (
https://www.adafruit.com/products/2026) and it works great; however, I seem to be completely incapable of using the Color888 properly. To give an example, if I want to go from a black/blank to red screen using Color444 I would use:
Code: Select all
for(int i=0; i<16; i++) {
matrix.fillScreen( matrix.Color444( i, 0, 0));
delay(100);
}
This works as expected. It slowly turns on the red channel in 16 steps. If I apply the same idea to Color888 using the for loop:
Code: Select all
for(int i=0; i<256; i++) {
matrix.fillScreen( matrix.Color888( i, 0, 0));
delay(100);
}
I do not get the same type of 256 step turn on one would expect. Instead, the panel only updates when i%8 == 0 and is at a max brightness when i%24 == 0 (i.e. the panel cycles from off to max 64 times over the loop) treating red as a 4 bit color. I run into a similar issue if I do the loop with only turning green or blue on. The green seems to update every i%4 == 0 with a max brightness at i%60 == 0, while the blue updates every i%16 == 0 with a max brightness at i==240. This behavior is very far from what I expected, assuming Color888 was designed to take in a 8 bit value for each channel like its 4 bit counterpart Color444.
Can anyone offer some insight as to why Color888 behaves this way (if it is indeed supposed to)? I can obviously get by with Color444, but I'd really like to understand whats going on here to get the most out of the panel. Cheers!
