How read count of 24 bit ADC HX711?
Arduino shiftin() is easy to port so that seems the simplest solution.

I posted a set of hx711 code here https://dannyelectronics.wordpress.com/2017/06/29/hx711-code-available/

It has links to the original work I did with the chip as well as downable code. You should be able to get it going on any chip easily.