linux tty

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from understand far, there 2 dedicated i/o pins set aside serial communications , avr on both processors.  python bridge seems depend on socket (i think) may interface socket i/o tty i/o.  aim disable whatever code dispatched on boot enables bridge , replace own code opens (hopefully) tty bound i/o pins , presents message queue and/or shared memory process wishes join.  question is: i/o pins appear tty?  if so, which.  assuming data on avr side written corresponding tx pin (which is?) read process on linux side , placed in either message queue or shared memory co-processes read , vice-versa write.  have hint digital pins on avr r/w from/to , tty open on linux side?  think need pin definitions on avr side , tty on linux side.  know bridge established code, background compels me go grass roots.

serial1 on avr connects tty on linux side. once system stood there's shell running on tty, can send shell commands it, , interact program.

this uses avr pins 0 , 1, that's irrelevant intact through hardware uart. execute run-bridge command, multiplexes section of services. no code run @ boot, rather avr side "types" command.


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