As we learned from a short internet search, the current library is using Arduino library functions like portInputRegister and portOutputRegister. However, to be more compatible with other architectures than AVR, digitalWrite and digitalRead should be used, actually.
For background information about this, see also:
Recommendation
So we recommend to try the ADS1232 library by Jeffrey M. Kubascik from the beer-gauge repository we found the other day. We will be happy about your feedback: