It might be more difficult to make a generic driver for but I've had some great success using a UART peripheral to read/write 1 wire devices. There's a good writeup of how this works in this app note: https://www.maximintegrated.com/en/app-notes/index.mvp/id/214
The benefit is less CPU time needed for bit banging but you need to make sure your 1 wire device fits the timing constraints of your UART peripheral. Just thought it was worth mentioning, might be something to consider. Sam On Tue., 3 Jul. 2018, 6:11 am Kevin Townsend, <ke...@adafruit.com.invalid> wrote: > Hi Miguel, > > Good to hear! > > Yeah, GPIO is the only way I've ever implemented this and I think a > simple SW implementation is the way to go here. > > K. > > > On 02/07/18 21:39, Miguel Azevedo wrote: > > Hi Kevin, > > I actually do have some code for 1-wire I implemented a few days ago. > > AFAIK most MCUs we support don't have 1-wire specific hardware, so why > > not have a general implementation(using hal_timer) instead of one > > implementation per MCU? > > > > Thanks, > > > > Miguel > > On Mon, Jul 2, 2018 at 8:10 PM Kevin Townsend > > <ke...@adafruit.com.invalid> wrote: > >> Is there any interest is discussing how to add Dallas 1-Wire support to > >> the HAL? https://en.wikipedia.org/wiki/1-Wire > >> > >> It's a bit of a niche item, but an interesting protocol (you can power > >> some devices from the single GPIO line) and there are some very common > >> and cheap waterproof temp sensors and a few other common items that are > >> only available in 1 wire. > >> > >> I'm happy to put one or two test drivers together for common items like > >> the DS18B20 (https://www.adafruit.com/product/381) ... but the HAL > >> implementation is something that should probably be discussed with the > >> wider community first. > >> > >> Kevin > >> > > > >
