Hi, Our custom board based on the BB-X15 has a(n) FT4232 USB<->serial hub to realize some of our serial ports. From the data sheet and programming guide, it looks like the chip supports RS485 toggling of a DE pin on a 485 chip via the chip's TXDEN line. But the data sheet and programming guide suggest that the FTDI chip's EEPROM needs to be programmed with the appropriate flags enabled to enable auto-toggling of TXDEN around transmit and receive.
I briefly looked through KERNEL (uname-r = 4.4.110-ti-r142)/drivers/usb/serial/ftdi_* to see if there's already an interface in the driver for initializing/re-initializing the FTDI chip's EEPROM to enable 485 mode. I did see references to 485 for other devices, but I haven't yet found anything obvious about enabling TXDEN specifically for this family of chips... Has anyone tried utilizing an FTDI USB<->serial hub for RS485 and is familiar with enabling the TXDEN line for this purpose in Linux? If so, any insight would be greatly appreciated!! Also are there any limitations in the driver or the chip that you're aware of? Thanks! Jeff -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/e0a9e0ec-3c06-4ca9-910c-3b32f29e73ed%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
