M5Dial Display flicker

[sternj]

Hi all,

I'm having some difficulty with the display on my Dial flickering when I try to redraw it-- I suspect from this issue that the problem is that clear() and clearDisplay() write all zeros to and (maybe?) entirely flush the buffer (I'm not sure if neither, only one, or both does that) and I can't quite figure out what to do here-- I'm porting some code and it handles display redrawing by assuming that each frame starts empty and is emitted when the display() function is called (the original uses Adafruit_SSD1306, I'm trying to change it to to use the M5GFX object in M5Dial.Display). What am I missing here?