I need a bunch more serial ports for the next version of my Raptor/G400 system, 12 to be precise. I’m considering 2 options. The first would used tri-stateable RS232 transceivers (like a Maxim Max3244). 3 of the native UARTS on the G400 will be dedicated to instruments that I talk to all the time and don’t want to multiplex. The other 3 UART ports on the G400 would drive/receive 3 RS232 transceivers and I’d enable the one connected to the instrument I want to talk to with a GPIO line. Probably a better solution is to use an I2C UART. If someone has used one of these, I’d sure like to hear about your experience. If you have a driver that works that would be even better (I haven’t found one on Codeshare or Google). If your driver uses interrupts that allow me to use NETMF event handlers like I do with the native UARTs, I’d be your new best friend.
If anyone has other ideas, I’d be happy to hear them.
Thanks - Gene