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Updated lowerrts.md

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Joe Merten
2017-12-31 07:49:02 +01:00
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@ -17,7 +17,7 @@ itself inverted) to the microcontroller's reset input pin.
Problem at open
---------------
In both Linux and OSX, we observe that the RTS handshake line will be
In both Linux and macOS, we observe that the RTS handshake line will be
driven high (TTL-level output low) when `open()` is called, even when
the port is used without hardware handshake.
@ -35,7 +35,7 @@ microcontroller.
Using the picocom `--lower-rts` command line option, I measured about
50µs-70µs on my Linux machine and 250µs-450µs on my old Macbook Pro
running OSX (both tested with an FTDI FT2232H USB-to-Serial adapter).
running macOS (both tested with an FTDI FT2232H USB-to-Serial adapter).
But note that there is no hard guarantee for these times; the OS may
preempt picocom between the `open()` and the "lower-rts" calls.