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# STM32F411CEU6 ADC example
This example is a continuation of the **stm32f411_adc**.
In this variant, there are 3 tasks (1 HW & 2 SW) involved and communication between them by means of an MPSC channel.
In the `#[init]` before spawning any task, an MPSC channel is created and split in its two parts.
Immediately after separating the `Receiver` and `Sender` the software task `printer_actor` is spawned and receives the `Receiver` end of the channel and starts listening.
Then two clones of the `Sender` type are created. The first one is stored as Local resource for the HW task and the second, is passed as an argument when the `pinger` software task is spawned.
## Hardware task bound to EXTI0: `gpio_interrupt_handler`
This task,
- Decreases the value of __delayval__ by 200
- Takes a new sample from the ADC input connected on pin `PA1`
- Sends a message of type `Message::PotentiometerValue` to the printer task
- Clears the interrupt_pending_bit
## Software task: `printer_actor`
This task makes use of the unused interrupt __SPI1__ as a dispatcher. Since it is an async fn, it ia constantly awaiting for incoming messages from other actors.
Depending on the type of message received, it prints something different.
## Software task: `pinger`
This is just a simple task that sends ping every 25000 millis and uses __SPI2__ as a dispatcher.
## How-to
### Build
Run `cargo build --release` to compile the code. If you run it for the first time, it will take some time to download and compile dependencies.
### Run
Install `probe-rs` and configure it using the [debugging extension for VScode](https://probe.rs/docs/tools/debugger/).
The output should look like this:
```
INFO Printer actor received a PING from software task
INFO Current delay value 1900
INFO Printer actor received a new PotentiometerValue: 607 from hardware task.
INFO Current delay value 1800
INFO Printer actor received a new PotentiometerValue: 1011 from hardware task.
INFO Current delay value 1700
INFO Printer actor received a new PotentiometerValue: 819 from hardware task.
INFO Printer actor received a PING from software task
```
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