LayerscapeのトピックRe: Add RS485 mode on ls1028

Add RS485 mode on ls1028

Eddy1 — Fri, 20 Sep 2024 02:16:35 GMT

Hi：

How do I configure Duart to operate in half-duplex RS485 mode? Currently, I am using the duart1 port, and the default configuration is as follows:

duart1: serial@21c0600 { compatible = "fsl,ns16550", "ns16550a"; reg = <0x00 0x21c0600 0x0 0x100>; interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>; clocks = <&clockgen 4 1>; status = "disabled"; };

Re: Add RS485 mode on ls1028

June_Lu — Mon, 23 Sep 2024 01:49:55 GMT

First, you should confirm the customer HW mode of UART in RS485.

If the direction of the RS485 is controlled by the extra signal, you should add it in the DTS, and modify the SW driver.

If the direction of the RS485 is controlled by the RTS, I don't think it needs extra modification.

Re: Add RS485 mode on ls1028

Eddy1 — Wed, 25 Sep 2024 01:41:31 GMT

Hi：

Thank you for your reply. I have modified the SW driver, and it can now send and receive