esp-rs
Uart: polarity inversion
As I can see an Esp32c3 chip supports inversion: uart_set_line_inverse
Have tested it from Micropython connecting to external module pins of my Radiomaster handset (it uses half-duplex serial interface with inverted polarity). So it would be nice to have the option in Rust.
There is an open PR for that already here: https://github.com/esp-rs/esp-hal/pull/1151
But it should already work via a slightly different mechanism introduced in https://github.com/esp-rs/esp-hal/pull/912
Oh, sorry. Haven't searched in PRs.
But it should already work via a slightly different mechanism introduced in https://github.com/esp-rs/esp-hal/pull/912
To make it work I should configure inversion on uart pins and then create a uart device?
Oh, sorry. Haven't searched in PRs.
No problem! 😄
To make it work I should configure inversion on uart pins and then create a uart device?
Yes, it should work that way but t.b.h. I haven't tried it with UART myself, yet
As discussed in #1703, it appears we already have a method of inverting the GPIO, which are then in turn correctly configured for inverted UART. As such, perhaps no additional code is required, just some updates to documentation.
cc @SergioGasquez @bjoernQ
