Hello Alan, Thank you. I will try to port SW RS485 to ESP32-S3, but from my experience in the past with RS485 I have a question: how TX echo is filtered out from RX stream when SW RS485 is used? Or that should be done at the application layer?
Best regards, Petro сб, 2 вер. 2023 р. о 16:46 Alan C. Assis <acas...@gmail.com> пише: > Hi Petro, > > The current RS485 implementation used on ESP32 is not using internal > RS485 controller of ESP32, it is implemented by "software". So you can > use it connecting a RS485 transceiver to UART port and using the right > DIR pin controller by RS485 driver. > > It is possible to use the internal IP RS485 from ESP32 or ESP32-S3, > you just need to look how it is done in the ESP-IDF and replicate it. > > But the SW RS485 works fine and it is easier to implement. > > BR, > > Alan > > On 9/2/23, Petro Karashchenko <petro.karashche...@gmail.com> wrote: > > Hi, > > > > I'm currently trying to enable RS485 support for ESP32-S3. I see that > there > > is some support of RS485 mode in ESP32 and it seems to be straight > forward > > to port it to ESP32-S3 however I see that currently ESP32-S3 lowputc has > > next lines > > > > modifyreg32(UART_RS485_CONF_REG(priv->id), UART_RS485_EN_M, 0); > > modifyreg32(UART_RS485_CONF_REG(priv->id), UART_RS485TX_RX_EN_M, 0); > > modifyreg32(UART_RS485_CONF_REG(priv->id), UART_RS485RXBY_TX_EN_M, 0); > > > > > > So I wonder if anybody has already leveraged the RS458 capabilities of > > ESP32-S3? > > > > Additionally I see that the same registers are available for ESP32, but I > > do not see any place where the "UART_RS485_CONF_REG" register is modified > > for ESP32 with RS485 enabled UARTs. > > > > Best regards, > > Petro > > >
