Banana pi BPI-R2 V1.1 hardware schematic diagram
after read this. i still can’t understand how 2nd pci-e interface works if unuse usb3.0 just ask. please don’t hate me
wow. thank you. i got it. so the pcie 2 pin define port is CON4 in your file
so ,if you not use USB 3.0 , just use those pin as a pcie interface ,do a extend board .