Slight tearing on 64x64 screen

[shewitson-spt93]

I've got a matrix of 640x64 and SM_PANELTYPE_HUB75_64ROW_MODSCAN32.

I'm using drawPixel to draw to every pixel in the backgroundLayer, then call swapBuffers.
It looks as thouigh swapBuffers only waits until a bank of 32 rows is complete before updating (rather than the full 64 rows).

This means that if I've got a moving edge then I can see the bottom half updating before the top half

[embedded-creations]

Unfortunately that's a natural part of how HUB75 panels work. You could try rotating the panel to reduce the effect, but there's not much that can be done besides keeping the refresh rate high:

https://www.sparkfun.com/news/2650