I rethink my question again and this depends on HW configuration also, so can't be handled at driver level generically.
сб, 2 вер. 2023 р. о 18:31 Petro Karashchenko <petro.karashche...@gmail.com> пише: > 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 >> > >> >
