It seems like the OP wanted to say that he has no clue how to operate the TLC3545 SPI interface, because there's only an output_low(SS) statement, but no 16 Bit SPI read and output_high(SS) afterwards ...
I have a small problem I need your help. I need to create a virtual table in a PIC18F4580, globally receive information with my MUX (8 inputs coded into 8bits analogical information ...