TODO.md

Todo list

1. Add protocol parser support so that receive events can be chopped up by line or by some other marker. This needs a slight amount of thought, since we also need to slice by timeouts (e.g., read in 32 byte chunks unless a partial one hangs around for too long). If we support returning things other than binaries, then it seems reasonable to expect the send side to translate. Also need to handle flush and drain.
2. Add tests for different baudrate and parity configs
3. Add tests for setting baudrate and flow control dynamically
4. Add a read_exact call to block until exactly n bytes are read or there's a timeout.
5. Fix the error code on Windows when you unplug the USB cable to be :eio. The error code that comes from ReadFile, etc. seems useless.
6. It seems like a use case would be to have one Erlang process writing continuously and another one reading continuously on the same uart. Currently each one can block the other. It seems desirable to have separate read and write queues and allow one read and one write to be pending simultaneously in the C code.
7. Clean up error reporting code. Pass back errno values and convert in platform independent code?
8. Active mode could support flow control if we add pause and resume calls. This could be emulated by turning the active mode off for pause and back on for resume. This feels really manual, but node-serialport does it this way.
9. See if undefining UNICODE on Windows is safe. Maybe a lot of sketchy UTF-16 to UTF-8 code can be removed? ** Basic tests suggest that this will work**
10. What should be done if open is called multiple times. Currently, it re-opens, but it could fail, or it could check if the port is the same and just do a configure. Be sure to add
11. Should start_link let you open a port automatically? This is nice on Nerves where you're guaranteed that the port exists usually, but not so much on the Desktop where ports are fickle.