of course I already have a code for one matrix,
That's not what you said in your previous statements. 
mounted yeah, going no. the code isn't working.
I also don't understand what it is you are asking if my answer above is not what you want.
If you do a hard reset then the MCU sends the setup data to the AS1130 from the start...including the CS reg.
If you only do a soft reset with the shdn then the CS reg doesn't change as far as I know from experimentation.
The trouble is (in my experience)...you make statements that are wrong...argue about the answer and then go on to another subject and repeat the cycle.
Either your code works or it doesn't...that is still unclear.
Does your hardware work?
What is it that doesn't work?
Post your hardware setup.
Post your code to run it.
Indicate what isn't working.
Then we might get somewhere... 