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erazor

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    erazor got a reaction from Igor in RTS signal and uart2 init   
    Attached is a git diff, which includes 2 patches:
    rs485-8250_dw.patch - manually merged for 5.13.3 [PATCH] tty: 8250_of: Use software emulated RS485 direction control @ 2019-09-13 5:01 Heiko Schocher
    As you can see it's for the current/latest armbian kernel version 5.13.3 . I haven't re-applied the patch to see if patching works but with these changes RS485 works great for me on my NanoPI Neo.
     
    I don't use any additional ENV-vars for booting, but this DTS::
    /dts-v1/; /plugin/; / { compatible = "allwinner,sun8i-h3"; fragment@0 { target = <&uart2>; __overlay__ { pinctrl-names = "default"; pinctrl-0 = <&uart2_pins>; linux,rs485-enabled-at-boot-time; rs485-rts-active-low; //rs485-rx-during-tx; rts-gpios = <&pio 0 2 1>; status = "okay"; }; }; };  
     
    This took me 3 days but I wouldn't get it running without this forum.
     
    Thanks Armbian Team!
    rs485-8250_dw-8250_of.patch

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