Uniformly UV-Mapping a Combined Mesh

Currently I have a system where I convert a 2D bit array into a huge number of planes and then stitch them together. They all have the same texture and UV information.

Now while I can tile the texture further, I cannot make the texture bigger as I want to do. I've looked at other questions asking how to UV map in code and they either focus on small cases such as a quad/cube or cases where you create the vertices in code.

I just need to know if it's possible to take an object made of an arbitrary number of vertices and apply a UV map in code such that a single instance of the texture is applied across its entirety so I could then scale it down for tiling.

 

Hello,

if you haven't read it yet, that post can be interesting.
Tiling is handled by the shader.