All models of Pi can signal txd/rxd/cts/rts on GPIO 13-16. Are you sure you need DTD?- Is it possible to configure the GPIO of the Pi5 to enable connection to other pins of a DE9? I am unsure how the ttyAMA0 of a Pi is configured, is it even able to convert CTS/RTS/DTD signals? Can I work on a schematic that uses op-amps to configure some of the GPIO of the Pi to simulate the other pin signals for a DE9?
Alternatively, UART0 on Pi 5 has all 8 UART signals available for this explicit purpose.
You could modify the serial HAT to connect up RTS/CTS via the unused MAX3232 I/O ports.
Statistics: Posted by jdb — Thu May 02, 2024 2:37 pm