Hi, On 26.01.24 18:27, Farouk Bouabid wrote: > From: Heiko Stuebner <heiko.stuebner@xxxxxxxxx> > > The RE signal is used to control the duplex mode of transmissions, > aka receiving data while sending in full duplex mode, while stopping > receiving data in half-duplex mode. > > On a number of boards the !RE signal is tied to ground so reception > is always enabled except if the UART allows disabling the receiver. > This can be taken advantage of to implement half-duplex mode - like > done on 8250_bcm2835aux. > > Another solution is to tie !RE to RTS always forcing half-duplex mode. > > And finally there is the option to control the RE signal separately, > like done here by introducing a new rs485-specific gpio that can be > set depending on the RX_DURING_TX setting in the common em485 callbacks. > we just added the rx_during_tx_gpio to the serial core. Why cant you use this GPIO for your purpose? Regards, Lino
