Some inattention of me caused the wrong connection of HiSpeed (I need 20MHz) SPIA (GPIO58...61) to GPIO55...58 on my prototype board.
Fortunately, GPIO58 as MOSI is OK, but for the other 3 I need to use INPUT_XBARs and OUTPUT_XBars, since I can not reach these BGA-pins (unconnected) with my solder iron on the prototype board and a new prototype board cost me 2 weeks or more and ... money.
I am stuck with the documentation after several hours. For example, how can I connect GPIO59 (as output) to some MUX, etc. etc., after I connected GPIO55 with: InputXbarRegs.INPUT1SELECT = 55? I want the signal from GPIO55 to arrive at SPIA-MISO (GPIO59). And then I want to output SPIA-CLK at GPIO56 and SPIA-SEL at GPIO57.
I understood that it should be straightforward to connect any GPIO to any GPIO, but I missed maybe something essential. Maybe it is impossible what I want.
Somebody can be of any help???
Henk Schutte
Amsterdam