On Wed, Dec 06, 2023 at 04:42:53PM +0100, Lino Sanfilippo wrote: > On 27.11.23 13:14, Christoph Niedermaier wrote: > > From: Lino Sanfilippo [mailto:LinoSanfilippo@xxxxxx] > > Sent: Sunday, November 26, 2023 12:40 AM ... > > RS-485 (2-wire NO RX_DURING_TX): rs485->flags = SER_RS485_ENABLED|SER_RS485_MODE_HALF_DUPLEX > > RS-485 (2-wire RX_DURING_TX): rs485->flags = SER_RS485_ENABLED|SER_RS485_MODE_HALF_DUPLEX|SER_RS485_RX_DURING_TX > > I think we can omit the SER_RS485_MODE_HALF_DUPLEX flag if we assume that > a missing SER_RS485_MODE_FULL_DUPLEX means half duplex (i.e. controlling > the RTS line). You should be very careful on these assumptions, i.e. one must to check _all_ existing user space tools (at least that are in use / supplied by main distros) on how they behave. -- With Best Regards, Andy Shevchenko
