696: Add async Mutex. r=Dirbaio a=Dirbaio
What it says on the tin :)
It allows sharing data between tasks when you want to `.await` stuff while holding it locked.
Co-authored-by: Dario Nieuwenhuis <dirbaio@dirbaio.net>
- Allow initializing in a static, without Forever.
- Remove ability to close, since in embedded enviromnents channels usually live forever and don't get closed.
- Remove MPSC restriction, it's MPMC now. Rename "mpsc" to "channel".
- `Sender` and `Receiver` are still available if you want to enforce a piece of code only has send/receive access, but are optional: you can send/receive directly into the Channel if you want.
* Keeps existing API for usart, but wraps it in Tx and Rx sub-types
* Adds split() method similar to nRF for getting indepdendent TX and RX
parts
* Implements e-h traits for TX and RX types
* Add stm32h7 example
648: Fix nRF Saadc continuous sampling r=Dirbaio a=huntc
Starting the sampling task prior to starting the SAADC peripheral can lead to unexpected buffer behaviour with multiple channels. We now provide an init callback at the point where the SAADC has started for the first time. This callback can be used to kick off sampling via PPI.
We also need to trigger the SAADC to start sampling the next buffer when the previous one is ended so that we do not drop samples - the major benefit of double buffering.
Given these additional tasks, we now simplify the API by passing in the TIMER and two PPI channels.
As a bonus, we provide an async `calibrate` method as it is recommended to use before starting up the sampling.
The example has been updated to illustrate these new features along with the simplified API.
The changes here have been tested on my nRF52840-DK.
656: stm32: Refactor DMA interrupts r=Dirbaio a=GrantM11235
Previously, every dma interrupt handler called the same `on_irq`
function which had to check the state of every dma channel.
Now, each dma interrupt handler only calls an `on_irq` method for its
corresponding channel or channels.
Co-authored-by: huntc <huntchr@gmail.com>
Co-authored-by: Grant Miller <GrantM11235@gmail.com>
Starting the sampling task prior to starting the SAADC peripheral can lead to unexpected buffer behaviour with multiple channels. We now provide an init callback at the point where the SAADC has started for the first time. This callback can be used to kick off sampling via PPI.
We also need to trigger the SAADC to start sampling the next buffer when the previous one is ended so that we do not drop samples - the major benefit of double buffering.
As a bonus we provide a calibrate method as it is recommended to use before starting up the sampling.
The example has been updated to illustrate these new features.
608: stm32f4: add adc + example r=Dirbaio a=ain101
Example tested on stm32f407vg Discovery Board.
minimal adc: no vref, dma, complex sequence
Co-authored-by: Frederik <frederik@frederik.at>
