I have an Advantec RSB-3430 board that I intend to use with RS485 comms from one of the serial comms ports from the CN1/CN2 connectors.
CN2 has 3 uarts (RS232 signals) labeled UART1, UART2 and UART3 (but that my not map exactly to MCU uart identifiers).
CN2 has 8 GPIO signals and CN1 has 4 GPIO signals. There is no indication in the user manual about whether any of those GPIOs can be used as alternate functions for associated RTS signal.
In RSB-3430 Debian Linux the GPIOs enumerate as gpio 117-127 and 133.
Is there any way to tell from these enumerations, what signals they map to on the MCU and whether they have RTS signal capability via alternate function (instead of GPIO function)?
Are gpio mappings (117-127, 133) determined by devicetree or something else?
Thanks, Brendan.
