I recently started programming Arduino for profit and you need to do exactly that, because the libraries range from somewhat buggy to completely broken. They so often just write into random other registers and if it works it is only do to the chip already working without any configuration and the library not breaking things too badly.
> szundi
> If you go mainstream with your requirements, you don’t step on these though
Absolutely not. I am talking about things like the example in the README, which actually doesn't do anything, because they forgot the shift to make it write into the right field. Or they added "support" in 2012 for the only chip which is still sold, but forgot to update the register addresses, so now you have code for a newer chip, which uses the register addresses of the old chip. This does not work with either chip. And this is all with the libraries "officially" "provided" by Arduino.