Control RS485 Half-Duplex with UART1(ttymxc0)

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Control RS485 Half-Duplex with UART1(ttymxc0)

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peanutstars_job
Contributor II

Hello.

Custom board with imx6dl is based from SABREAUTO RDK board.

I want to control Half-Duplex Mode of RS485 with UART1(ttymxc0).

64.1.1 UART Features  of the datasheet described "RS-485 driver direction control via CTS_B signal".

RS485_Direction Control.PNG

MTXEN485(CTS_B) port set to high when transmit data out, in other case set to low.

Anyway I'm googling this,

normally connect RTS_B to direction control of 485 driver with SER_RS485_ENABLE|SER_RS485_RTS_ON_SEND options.

What is right to connect RS485 driver direction control to CTS_B or RTS_B ?

Thank you.

Regards,

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi HyunSuk

seems both options can be used, for patches one can look at

[imx6] RS485 could be supported on Imx6 series ?  

Best regards
igor
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