I need to connect two SPI devices to Beaglebone. According to the documentation both SPI1_CS0 and SPI1_CS1 are available on the extension header:
SPI1_D0, SPI1_D1 and SPI1_SCLK are available on P9, P9 and P9.
SPI1_CS0 is available on P9 and P9.
SPI1_CS1 is available on P9 and P9.
I've traced these through the schematics and found they are connected to the following pins on the CPU (AM335x):
- SPI1_D0 -> B13
- SPI1_D1 -> D12
- SPI1_SCLK -> A13
- SPI1_CS0 -> C12 / D18
- SPI1_CS1 -> C18 / D17
However, there seems to be no combination that enables both CS0 and CS1. I've tried to make a working pinmux using the TI pinmux tool, but no matter what combination I use for CS0 and CS1 i get "pin conflict" and error message that one or the other is not available in the IO-set.
Is there really no way to enable both CS0 and CS1 on the Beaglebone?
(I'm using Beaglebone Green Wireless, which should be compatible with Beaglebone Black)