Merge remote-tracking branch 'origin/main'

This commit is contained in:
sodo 2023-12-10 01:45:55 +09:00
commit 7956ef9247
29 changed files with 922 additions and 38 deletions

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@ -1,6 +1,8 @@
* xref:getting_started.adoc[Getting started]
** xref:basic_application.adoc[Basic application]
** xref:project_structure.adoc[Project Structure]
** xref:new_project.adoc[Starting a new Embassy project]
** xref:best_practices.adoc[Best Practices]
* xref:layer_by_layer.adoc[Bare metal to async]
* xref:runtime.adoc[Executor]
* xref:delaying_a_task.adoc[Delaying a Task]
@ -10,6 +12,7 @@
* xref:bootloader.adoc[Bootloader]
* xref:examples.adoc[Examples]
* xref:developer.adoc[Developer]
** xref:developer_stm32.adoc[Developer: STM32]
* xref:developer.adoc[Developer Docs]
** xref:developer_stm32.adoc[Developer Docs: STM32]
* xref:embassy_in_the_wild.adoc[Embassy in the wild]
* xref:faq.adoc[Frequently Asked Questions]

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@ -0,0 +1,53 @@
= Best Practices
Over time, a couple of best practices have emerged. The following list should serve as a guideline for developers writing embedded software in _Rust_, especially in the context of the _Embassy_ framework.
== Passing Buffers by Reference
It may be tempting to pass arrays or wrappers, like link:https://docs.rs/heapless/latest/heapless/[`heapless::Vec`], to a function or return one just like you would with a `std::Vec`. However, in most embedded applications you don't want to spend ressources on an allocator and end up placing buffers on the stack.
This, however, can easily blow up your stack if you are not careful.
Consider the following example:
[,rust]
----
fn process_buffer(mut buf: [u8; 1024]) -> [u8; 1024] {
// do stuff and return new buffer
for elem in buf.iter_mut() {
*elem = 0;
}
buf
}
pub fn main() -> () {
let buf = [1u8; 1024];
let buf_new = process_buffer(buf);
// do stuff with buf_new
()
}
----
When calling `process_buffer` in your program, a copy of the buffer you pass to the function will be created,
consuming another 1024 bytes.
After the processing, another 1024 byte buffer will be placed on the stack to be returned to the caller.
(You can check the assembly, there will be two memcopy operations, e.g., `bl __aeabi_memcpy` when compiling for a Cortex-M processor.)
*Possible Solution:*
Pass the data by reference and not by value on both, the way in and the way out.
For example, you could return a slice of the input buffer as the output.
Requiring the lifetime of the input slice and the output slice to be the same, the memory safetly of this procedure will be enforced by the compiler.
[,rust]
----
fn process_buffer<'a>(buf: &'a mut [u8]) -> &'a mut[u8] {
for elem in buf.iter_mut() {
*elem = 0;
}
buf
}
pub fn main() -> () {
let mut buf = [1u8; 1024];
let buf_new = process_buffer(&mut buf);
// do stuff with buf_new
()
}
----

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@ -0,0 +1,9 @@
= Embassy in the wild!
Here are known examples of real-world projects which make use of Embassy. Feel free to link:https://github.com/embassy-rs/embassy/blob/main/docs/modules/ROOT/pages/embassy_in_the_wild.adoc[add more]!
* link:https://github.com/cbruiz/printhor/[Printhor: The highly reliable but not necessarily functional 3D printer firmware]
** Targets some STM32 MCUs
* link:https://github.com/card-io-ecg/card-io-fw[Card/IO firmware] - firmware for an open source ECG device
** Targets the ESP32-S3 or ESP32-C6 MCU
* The link:https://github.com/lora-rs/lora-rs[lora-rs] project includes link:https://github.com/lora-rs/lora-rs/tree/main/examples/stm32l0/src/bin[various standalone examples] for NRF52840, RP2040, STM32L0 and STM32WL

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@ -47,7 +47,8 @@ The first step to managing your binary size is to set up your link:https://doc.r
debug = false
lto = true
opt-level = "s"
incremental = true
incremental = false
codegen-units = 1
----
All of these flags are elaborated on in the Rust Book page linked above.
@ -135,3 +136,20 @@ embassy-time = { git = "https://github.com/embassy-rs/embassy.git", rev = "e5fdd
----
Note that the git revision should match any other embassy patches or git dependencies that you are using!
== How can I optimize the speed of my embassy-stm32 program?
* Make sure RCC is set up to go as fast as possible
* Make sure link:https://docs.rs/cortex-m/latest/cortex_m/peripheral/struct.SCB.html[flash cache] is enabled
* build with `--release`
* Set the following keys for the release profile in your `Cargo.toml`:
** `opt-level = "s"`
** `lto = "fat"`
* Set the following keys in the `[unstable]` section of your `.cargo/config.toml`
** `build-std = ["core"]`
** `build-std-features = ["panic_immediate_abort"]`
* Enable feature `embassy-time/generic-queue`, disable feature `embassy-executor/integrated-timers`
* When using `InterruptExecutor`:
** disable `executor-thread`
** make `main`` spawn everything, then enable link:https://docs.rs/cortex-m/latest/cortex_m/peripheral/struct.SCB.html#method.set_sleeponexit[SCB.SLEEPONEXIT] and `loop { cortex_m::asm::wfi() }`
** *Note:* If you need 2 priority levels, using 2 interrupt executors is better than 1 thread executor + 1 interrupt executor.

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@ -0,0 +1,178 @@
= Starting a new Embassy project
Once youve successfully xref:getting_started.adoc[run some example projects], the next step is to make a standalone Embassy project. The easiest way to do this is to adapt an example for a similar chip to the one youre targeting.
As an example, lets create a new embassy project from scratch for a STM32G474. The same instructions are applicable for any supported chip with some minor changes.
Run:
[source,bash]
----
cargo new stm32g474-example
cd stm32g474-example
----
to create an empty rust project:
[source]
----
stm32g474-example
├── Cargo.toml
└── src
└── main.rs
----
Looking in link:https://github.com/embassy-rs/embassy/tree/main/examples[the Embassy examples], we can see theres a `stm32g4` folder. Find `src/blinky.rs` and copy its contents into our `src/main.rs`.
== .cargo/config.toml
Currently, wed need to provide cargo with a target triple every time we run `cargo build` or `cargo run`. Lets spare ourselves that work by copying `.cargo/config.toml` from `examples/stm32g4` into our project.
[source]
----
stm32g474-example
├── .cargo
│   └── config.toml
├── Cargo.toml
└── src
└── main.rs
----
In addition to a target triple, `.cargo/config.toml` contains a `runner` key which allows us to conveniently run our project on hardware with `cargo run` via probe-rs. In order for this to work, we need to provide the correct chip ID. We can do this by checking `probe-rs chip list`:
[source,bash]
----
$ probe-rs chip list | grep -i stm32g474re
STM32G474RETx
----
and copying `STM32G474RETx` into `.cargo/config.toml` as so:
[source,toml]
----
[target.'cfg(all(target_arch = "arm", target_os = "none"))']
# replace STM32G071C8Rx with your chip as listed in `probe-rs chip list`
runner = "probe-rs run --chip STM32G474RETx"
----
== Cargo.toml
Now that cargo knows what target to compile for (and probe-rs knows what chip to run it on), were ready to add some dependencies.
Looking in `examples/stm32g4/Cargo.toml`, we can see that the examples require a number of embassy crates. For blinky, well only need three of them: `embassy-stm32`, `embassy-executor` and `embassy-time`.
At the time of writing, the latest version of embassy isnt available on crates.io, so we need to install it straight from the git repository. The recommended way of doing so is as follows:
* Copy the required `embassy-*` lines from the example `Cargo.toml`
* Make any necessary changes to `features`, e.g. requiring the `stm32g474re` feature of `embassy-stm32`
* Remove the `path = ""` keys in the `embassy-*` entries
* Create a `[patch.crates-io]` section, with entries for each embassy crate we need. These should all contain identical values: a link to the git repository, and a reference to the commit were checking out. Assuming you want the latest commit, you can find it by running `git ls-remote https://github.com/embassy-rs/embassy.git HEAD`
NOTE: When using this method, its necessary that the `version` keys in `[dependencies]` match up with the versions defined in each crates `Cargo.toml` in the specificed `rev` under `[patch.crates.io]`. This means that when updating, you have to a pick a new revision, change everything in `[patch.crates.io]` to match it, and then correct any versions under `[dependencies]` which have changed. Hopefully this will no longer be necessary once embassy is released on crates.io!
At the time of writing, this method produces the following results:
[source,toml]
----
[dependencies]
embassy-stm32 = {version = "0.1.0", features = ["defmt", "time-driver-any", "stm32g474re", "memory-x", "unstable-pac", "exti"]}
embassy-executor = { version = "0.3.3", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
embassy-time = { version = "0.2", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
[patch.crates-io]
embassy-time = { git = "https://github.com/embassy-rs/embassy", rev = "7703f47c1ecac029f603033b7977d9a2becef48c" }
embassy-executor = { git = "https://github.com/embassy-rs/embassy", rev = "7703f47c1ecac029f603033b7977d9a2becef48c" }
embassy-stm32 = { git = "https://github.com/embassy-rs/embassy", rev = "7703f47c1ecac029f603033b7977d9a2becef48c" }
----
There are a few other dependencies we need to build the project, but fortunately theyre much simpler to install. Copy their lines from the example `Cargo.toml` to the the `[dependencies]` section in the new `Cargo.toml`:
[source,toml]
----
defmt = "0.3.5"
defmt-rtt = "0.4.0"
cortex-m = {version = "0.7.7", features = ["critical-section-single-core"]}
cortex-m-rt = "0.7.3"
panic-probe = "0.3.1"
----
These are the bare minimum dependencies required to run `blinky.rs`, but its worth taking a look at the other dependencies specified in the example `Cargo.toml`, and noting what features are required for use with embassy for example `futures = { version = "0.3.17", default-features = false, features = ["async-await"] }`.
Finally, copy the `[profile.release]` section from the example `Cargo.toml` into ours.
[source,toml]
----
[profile.release]
debug = 2
----
== rust-toolchain.toml
Before we can build our project, we need to add an additional file to tell cargo to use the nightly toolchain. Copy the `rust-toolchain.toml` from the embassy repo to ours, and trim the list of targets down to only the target triple relevent for our project — in this case, `thumbv7em-none-eabi`:
[source]
----
stm32g474-example
├── .cargo
│   └── config.toml
├── Cargo.toml
├── rust-toolchain.toml
└── src
└── main.rs
----
[source,toml]
----
# Before upgrading check that everything is available on all tier1 targets here:
# https://rust-lang.github.io/rustup-components-history
[toolchain]
channel = "nightly-2023-11-01"
components = [ "rust-src", "rustfmt", "llvm-tools", "miri" ]
targets = ["thumbv7em-none-eabi"]
----
== build.rs
In order to produce a working binary for our target, cargo requires a custom build script. Copy `build.rs` from the example to our project:
[source]
----
stm32g474-example
├── build.rs
├── .cargo
│ └── config.toml
├── Cargo.toml
├── rust-toolchain.toml
└── src
└── main.rs
----
== Building and running
At this point, were finally ready to build and run our project! Connect your board via a debug probe and run:
[source,bash]
----
cargo run --release
----
should result in a blinking LED (if theres one attached to the pin in `src/main.rs` change it if not!) and the following output:
[source]
----
Compiling stm32g474-example v0.1.0 (/home/you/stm32g474-example)
Finished release [optimized + debuginfo] target(s) in 0.22s
Running `probe-rs run --chip STM32G474RETx target/thumbv7em-none-eabi/release/stm32g474-example`
Erasing sectors ✔ [00:00:00] [#########################################################] 18.00 KiB/18.00 KiB @ 54.09 KiB/s (eta 0s )
Programming pages ✔ [00:00:00] [#########################################################] 17.00 KiB/17.00 KiB @ 35.91 KiB/s (eta 0s ) Finished in 0.817s
0.000000 TRACE BDCR configured: 00008200
└─ embassy_stm32::rcc::bd::{impl#3}::init::{closure#4} @ /home/you/.cargo/git/checkouts/embassy-9312dcb0ed774b29/7703f47/embassy-stm32/src/fmt.rs:117
0.000000 DEBUG rcc: Clocks { sys: Hertz(16000000), pclk1: Hertz(16000000), pclk1_tim: Hertz(16000000), pclk2: Hertz(16000000), pclk2_tim: Hertz(16000000), hclk1: Hertz(16000000), hclk2: Hertz(16000000), pll1_p: None, adc: None, adc34: None, rtc: Some(Hertz(32000)) }
└─ embassy_stm32::rcc::set_freqs @ /home/you/.cargo/git/checkouts/embassy-9312dcb0ed774b29/7703f47/embassy-stm32/src/fmt.rs:130
0.000000 INFO Hello World!
└─ embassy_stm32g474::____embassy_main_task::{async_fn#0} @ src/main.rs:14
0.000091 INFO high
└─ embassy_stm32g474::____embassy_main_task::{async_fn#0} @ src/main.rs:19
0.300201 INFO low
└─ embassy_stm32g474::____embassy_main_task::{async_fn#0} @ src/main.rs:23
----

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@ -1,3 +1,4 @@
//! Atomic reusable ringbuffer.
use core::slice;
use core::sync::atomic::{AtomicPtr, AtomicUsize, Ordering};
@ -14,8 +15,9 @@ use core::sync::atomic::{AtomicPtr, AtomicUsize, Ordering};
/// One concurrent writer and one concurrent reader are supported, even at
/// different execution priorities (like main and irq).
pub struct RingBuffer {
#[doc(hidden)]
pub buf: AtomicPtr<u8>,
pub len: AtomicUsize,
len: AtomicUsize,
// start and end wrap at len*2, not at len.
// This allows distinguishing "full" and "empty".
@ -24,11 +26,16 @@ pub struct RingBuffer {
//
// This avoids having to consider the ringbuffer "full" at len-1 instead of len.
// The usual solution is adding a "full" flag, but that can't be made atomic
#[doc(hidden)]
pub start: AtomicUsize,
#[doc(hidden)]
pub end: AtomicUsize,
}
/// A type which can only read from a ring buffer.
pub struct Reader<'a>(&'a RingBuffer);
/// A type which can only write to a ring buffer.
pub struct Writer<'a>(&'a RingBuffer);
impl RingBuffer {
@ -89,10 +96,12 @@ impl RingBuffer {
Writer(self)
}
/// Return length of buffer.
pub fn len(&self) -> usize {
self.len.load(Ordering::Relaxed)
}
/// Check if buffer is full.
pub fn is_full(&self) -> bool {
let len = self.len.load(Ordering::Relaxed);
let start = self.start.load(Ordering::Relaxed);
@ -101,6 +110,7 @@ impl RingBuffer {
self.wrap(start + len) == end
}
/// Check if buffer is empty.
pub fn is_empty(&self) -> bool {
let start = self.start.load(Ordering::Relaxed);
let end = self.end.load(Ordering::Relaxed);
@ -238,6 +248,7 @@ impl<'a> Writer<'a> {
[(unsafe { buf.add(end) }, n0), (buf, n1)]
}
/// Mark n bytes as written and advance the write index.
pub fn push_done(&mut self, n: usize) {
trace!(" ringbuf: push {:?}", n);
let end = self.0.end.load(Ordering::Relaxed);
@ -323,6 +334,7 @@ impl<'a> Reader<'a> {
(unsafe { buf.add(start) }, n)
}
/// Mark n bytes as read and allow advance the read index.
pub fn pop_done(&mut self, n: usize) {
trace!(" ringbuf: pop {:?}", n);

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@ -1,16 +1,20 @@
//! Types for controlling when drop is invoked.
use core::mem;
use core::mem::MaybeUninit;
#[must_use = "to delay the drop handler invokation to the end of the scope"]
/// A type to delay the drop handler invocation.
#[must_use = "to delay the drop handler invocation to the end of the scope"]
pub struct OnDrop<F: FnOnce()> {
f: MaybeUninit<F>,
}
impl<F: FnOnce()> OnDrop<F> {
/// Create a new instance.
pub fn new(f: F) -> Self {
Self { f: MaybeUninit::new(f) }
}
/// Prevent drop handler from running.
pub fn defuse(self) {
mem::forget(self)
}
@ -34,6 +38,7 @@ pub struct DropBomb {
}
impl DropBomb {
/// Create a new instance.
pub fn new() -> Self {
Self { _private: () }
}

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@ -1,6 +1,7 @@
#![no_std]
#![allow(clippy::new_without_default)]
#![doc = include_str!("../README.md")]
#![warn(missing_docs)]
// This mod MUST go first, so that the others see its macros.
pub(crate) mod fmt;

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@ -1,3 +1,4 @@
/// Types for the peripheral singletons.
#[macro_export]
macro_rules! peripherals_definition {
($($(#[$cfg:meta])? $name:ident),*$(,)?) => {
@ -29,6 +30,7 @@ macro_rules! peripherals_definition {
};
}
/// Define the peripherals struct.
#[macro_export]
macro_rules! peripherals_struct {
($($(#[$cfg:meta])? $name:ident),*$(,)?) => {
@ -87,6 +89,7 @@ macro_rules! peripherals_struct {
};
}
/// Defining peripheral type.
#[macro_export]
macro_rules! peripherals {
($($(#[$cfg:meta])? $name:ident),*$(,)?) => {
@ -105,6 +108,7 @@ macro_rules! peripherals {
};
}
/// Convenience converting into reference.
#[macro_export]
macro_rules! into_ref {
($($name:ident),*) => {
@ -114,6 +118,7 @@ macro_rules! into_ref {
}
}
/// Implement the peripheral trait.
#[macro_export]
macro_rules! impl_peripheral {
($type:ident) => {

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@ -20,6 +20,7 @@ pub struct PeripheralRef<'a, T> {
}
impl<'a, T> PeripheralRef<'a, T> {
/// Create a new reference to a peripheral.
#[inline]
pub fn new(inner: T) -> Self {
Self {

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@ -1,3 +1,4 @@
//! Types for dealing with rational numbers.
use core::ops::{Add, Div, Mul};
use num_traits::{CheckedAdd, CheckedDiv, CheckedMul};

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@ -97,6 +97,28 @@ mod chip;
/// This defines the right interrupt handlers, and creates a unit struct (like `struct Irqs;`)
/// and implements the right [`Binding`]s for it. You can pass this struct to drivers to
/// prove at compile-time that the right interrupts have been bound.
///
/// Example of how to bind one interrupt:
///
/// ```rust,ignore
/// use embassy_nrf::{bind_interrupts, spim, peripherals};
///
/// bind_interrupts!(struct Irqs {
/// SPIM3 => spim::InterruptHandler<peripherals::SPI3>;
/// });
/// ```
///
/// Example of how to bind multiple interrupts in a single macro invocation:
///
/// ```rust,ignore
/// use embassy_nrf::{bind_interrupts, spim, twim, peripherals};
///
/// bind_interrupts!(struct Irqs {
/// SPIM3 => spim::InterruptHandler<peripherals::SPI3>;
/// SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0 => twim::InterruptHandler<peripherals::TWISPI0>;
/// });
/// ```
// developer note: this macro can't be in `embassy-hal-internal` due to the use of `$crate`.
#[macro_export]
macro_rules! bind_interrupts {

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@ -86,6 +86,17 @@ embassy_hal_internal::interrupt_mod!(
/// This defines the right interrupt handlers, and creates a unit struct (like `struct Irqs;`)
/// and implements the right [`Binding`]s for it. You can pass this struct to drivers to
/// prove at compile-time that the right interrupts have been bound.
///
/// Example of how to bind one interrupt:
///
/// ```rust,ignore
/// use embassy_rp::{bind_interrupts, usb, peripherals};
///
/// bind_interrupts!(struct Irqs {
/// USBCTRL_IRQ => usb::InterruptHandler<peripherals::USB>;
/// });
/// ```
///
// developer note: this macro can't be in `embassy-hal-internal` due to the use of `$crate`.
#[macro_export]
macro_rules! bind_interrupts {

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@ -58,7 +58,7 @@ rand_core = "0.6.3"
sdio-host = "0.5.0"
embedded-sdmmc = { git = "https://github.com/embassy-rs/embedded-sdmmc-rs", rev = "a4f293d3a6f72158385f79c98634cb8a14d0d2fc", optional = true }
critical-section = "1.1"
stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-7117ad49c06fa00c388130a34977e029910083bd" }
stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-8f5fcae8c289c1ad481cc3a2bb37db023a61599c" }
vcell = "0.1.3"
bxcan = "0.7.0"
nb = "1.0.0"
@ -76,7 +76,7 @@ critical-section = { version = "1.1", features = ["std"] }
[build-dependencies]
proc-macro2 = "1.0.36"
quote = "1.0.15"
stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-7117ad49c06fa00c388130a34977e029910083bd", default-features = false, features = ["metadata"]}
stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-8f5fcae8c289c1ad481cc3a2bb37db023a61599c", default-features = false, features = ["metadata"]}
[features]

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@ -930,6 +930,10 @@ fn main() {
} else if pin.signal.starts_with("INN") {
// TODO handle in the future when embassy supports differential measurements
None
} else if pin.signal.starts_with("IN") && pin.signal.ends_with("b") {
// we number STM32L1 ADC bank 1 as 0..=31, bank 2 as 32..=63
let signal = pin.signal.strip_prefix("IN").unwrap().strip_suffix("b").unwrap();
Some(32u8 + signal.parse::<u8>().unwrap())
} else if pin.signal.starts_with("IN") {
Some(pin.signal.strip_prefix("IN").unwrap().parse().unwrap())
} else {

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@ -148,7 +148,7 @@ impl<'d, T: Instance> Adc<'d, T> {
reg.set_cont(false);
reg.set_exttrig(true);
reg.set_swstart(false);
reg.set_extsel(crate::pac::adc::vals::Extsel::SWSTART);
reg.set_extsel(7); // SWSTART
});
// Configure the channel to sample

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@ -0,0 +1,413 @@
use core::future::poll_fn;
use core::marker::PhantomData;
use core::task::Poll;
use embassy_futures::yield_now;
use embassy_hal_internal::into_ref;
use embassy_time::Instant;
use super::Resolution;
use crate::adc::{Adc, AdcPin, Instance, SampleTime};
use crate::interrupt::typelevel::Interrupt;
use crate::time::Hertz;
use crate::{interrupt, Peripheral};
const ADC_FREQ: Hertz = crate::rcc::HSI_FREQ;
pub const VDDA_CALIB_MV: u32 = 3300;
pub const ADC_MAX: u32 = (1 << 12) - 1;
pub const VREF_INT: u32 = 1230;
pub enum AdcPowerMode {
AlwaysOn,
DelayOff,
IdleOff,
DelayIdleOff,
}
pub enum Prescaler {
Div1,
Div2,
Div3,
Div4,
}
/// Interrupt handler.
pub struct InterruptHandler<T: Instance> {
_phantom: PhantomData<T>,
}
impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandler<T> {
unsafe fn on_interrupt() {
if T::regs().sr().read().eoc() {
T::regs().cr1().modify(|w| w.set_eocie(false));
} else {
return;
}
T::state().waker.wake();
}
}
fn update_vref<T: Instance>(op: i8) {
static VREF_STATUS: core::sync::atomic::AtomicU8 = core::sync::atomic::AtomicU8::new(0);
if op > 0 {
if VREF_STATUS.fetch_add(1, core::sync::atomic::Ordering::SeqCst) == 0 {
T::regs().ccr().modify(|w| w.set_tsvrefe(true));
}
} else {
if VREF_STATUS.fetch_sub(1, core::sync::atomic::Ordering::SeqCst) == 1 {
T::regs().ccr().modify(|w| w.set_tsvrefe(false));
}
}
}
pub struct Vref<T: Instance>(core::marker::PhantomData<T>);
impl<T: Instance> AdcPin<T> for Vref<T> {}
impl<T: Instance> super::sealed::AdcPin<T> for Vref<T> {
fn channel(&self) -> u8 {
17
}
}
impl<T: Instance> Vref<T> {
/// The value that vref would be if vdda was at 3000mv
pub fn calibrated_value(&self) -> u16 {
crate::pac::VREFINTCAL.data().read().value()
}
pub async fn calibrate(&mut self, adc: &mut Adc<'_, T>) -> Calibration {
let vref_val = adc.read(self).await;
Calibration {
vref_cal: self.calibrated_value(),
vref_val,
}
}
}
pub struct Calibration {
vref_cal: u16,
vref_val: u16,
}
impl Calibration {
/// The millivolts that the calibration value was measured at
pub const CALIBRATION_UV: u32 = 3_000_000;
/// Returns the measured VddA in microvolts (uV)
pub fn vdda_uv(&self) -> u32 {
(Self::CALIBRATION_UV * self.vref_cal as u32) / self.vref_val as u32
}
/// Returns the measured VddA as an f32
pub fn vdda_f32(&self) -> f32 {
(Self::CALIBRATION_UV as f32 / 1_000.0) * (self.vref_cal as f32 / self.vref_val as f32)
}
/// Returns a calibrated voltage value as in microvolts (uV)
pub fn cal_uv(&self, raw: u16, resolution: super::Resolution) -> u32 {
(self.vdda_uv() / resolution.to_max_count()) * raw as u32
}
/// Returns a calibrated voltage value as an f32
pub fn cal_f32(&self, raw: u16, resolution: super::Resolution) -> f32 {
raw as f32 * self.vdda_f32() / resolution.to_max_count() as f32
}
}
impl<T: Instance> Drop for Vref<T> {
fn drop(&mut self) {
update_vref::<T>(-1)
}
}
pub struct Temperature<T: Instance>(core::marker::PhantomData<T>);
impl<T: Instance> AdcPin<T> for Temperature<T> {}
impl<T: Instance> super::sealed::AdcPin<T> for Temperature<T> {
fn channel(&self) -> u8 {
16
}
}
impl<T: Instance> Drop for Temperature<T> {
fn drop(&mut self) {
update_vref::<T>(-1)
}
}
impl<'d, T: Instance> Adc<'d, T> {
pub fn new(
adc: impl Peripheral<P = T> + 'd,
_irq: impl interrupt::typelevel::Binding<T::Interrupt, InterruptHandler<T>> + 'd,
) -> Self {
into_ref!(adc);
T::enable_and_reset();
//let r = T::regs();
//r.cr2().write(|w| w.set_align(true));
T::Interrupt::unpend();
unsafe {
T::Interrupt::enable();
}
Self { adc }
}
fn freq() -> Hertz {
let div = T::regs().ccr().read().adcpre() + 1;
ADC_FREQ / div as u32
}
pub async fn set_resolution(&mut self, res: Resolution) {
let was_on = Self::is_on();
if was_on {
self.stop_adc().await;
}
T::regs().cr1().modify(|w| w.set_res(res.into()));
if was_on {
self.start_adc().await;
}
}
pub fn resolution(&self) -> Resolution {
match T::regs().cr1().read().res() {
crate::pac::adc::vals::Res::TWELVEBIT => Resolution::TwelveBit,
crate::pac::adc::vals::Res::TENBIT => Resolution::TenBit,
crate::pac::adc::vals::Res::EIGHTBIT => Resolution::EightBit,
crate::pac::adc::vals::Res::SIXBIT => Resolution::SixBit,
}
}
pub fn enable_vref(&self) -> Vref<T> {
update_vref::<T>(1);
Vref(core::marker::PhantomData)
}
pub fn enable_temperature(&self) -> Temperature<T> {
T::regs().ccr().modify(|w| w.set_tsvrefe(true));
Temperature::<T>(core::marker::PhantomData)
}
/// Perform a single conversion.
async fn convert(&mut self) -> u16 {
let was_on = Self::is_on();
if !was_on {
self.start_adc().await;
}
self.wait_sample_ready().await;
T::regs().sr().write(|_| {});
T::regs().cr1().modify(|w| {
w.set_eocie(true);
w.set_scan(false);
});
T::regs().cr2().modify(|w| {
w.set_swstart(true);
w.set_cont(false);
}); // swstart cleared by HW
let res = poll_fn(|cx| {
T::state().waker.register(cx.waker());
if T::regs().sr().read().eoc() {
let res = T::regs().dr().read().rdata();
Poll::Ready(res)
} else {
Poll::Pending
}
})
.await;
if !was_on {
self.stop_adc().await;
}
res
}
#[inline(always)]
fn is_on() -> bool {
T::regs().sr().read().adons() || T::regs().cr2().read().adon()
}
pub async fn start_adc(&self) {
//defmt::trace!("Turn ADC on");
T::regs().cr2().modify(|w| w.set_adon(true));
//defmt::trace!("Waiting for ADC to turn on");
let mut t = Instant::now();
while !T::regs().sr().read().adons() {
yield_now().await;
if t.elapsed() > embassy_time::Duration::from_millis(1000) {
t = Instant::now();
//defmt::trace!("ADC still not on");
}
}
//defmt::trace!("ADC on");
}
pub async fn stop_adc(&self) {
if T::regs().cr2().read().adon() {
//defmt::trace!("ADC should be on, wait for it to start");
while !T::regs().csr().read().adons1() {
yield_now().await;
}
}
//defmt::trace!("Turn ADC off");
T::regs().cr2().modify(|w| w.set_adon(false));
//defmt::trace!("Waiting for ADC to turn off");
while T::regs().csr().read().adons1() {
yield_now().await;
}
}
pub async fn read(&mut self, pin: &mut impl AdcPin<T>) -> u16 {
self.set_sample_sequence(&[pin.channel()]).await;
self.convert().await
}
async fn wait_sample_ready(&self) {
//trace!("Waiting for sample channel to be ready");
while T::regs().sr().read().rcnr() {
yield_now().await;
}
}
pub async fn set_sample_time(&mut self, pin: &mut impl AdcPin<T>, sample_time: SampleTime) {
if Self::get_channel_sample_time(pin.channel()) != sample_time {
self.stop_adc().await;
unsafe {
Self::set_channel_sample_time(pin.channel(), sample_time);
}
self.start_adc().await;
}
}
pub fn get_sample_time(&self, pin: &impl AdcPin<T>) -> SampleTime {
Self::get_channel_sample_time(pin.channel())
}
/// Sets the channel sample time
///
/// ## SAFETY:
/// - ADON == 0 i.e ADC must not be enabled when this is called.
unsafe fn set_channel_sample_time(ch: u8, sample_time: SampleTime) {
let sample_time = sample_time.into();
match ch {
0..=9 => T::regs().smpr3().modify(|reg| reg.set_smp(ch as _, sample_time)),
10..=19 => T::regs()
.smpr2()
.modify(|reg| reg.set_smp(ch as usize - 10, sample_time)),
20..=29 => T::regs()
.smpr1()
.modify(|reg| reg.set_smp(ch as usize - 20, sample_time)),
30..=31 => T::regs()
.smpr0()
.modify(|reg| reg.set_smp(ch as usize - 30, sample_time)),
_ => panic!("Invalid channel to sample"),
}
}
fn get_channel_sample_time(ch: u8) -> SampleTime {
match ch {
0..=9 => T::regs().smpr3().read().smp(ch as _),
10..=19 => T::regs().smpr2().read().smp(ch as usize - 10),
20..=29 => T::regs().smpr1().read().smp(ch as usize - 20),
30..=31 => T::regs().smpr0().read().smp(ch as usize - 30),
_ => panic!("Invalid channel to sample"),
}
.into()
}
/// Sets the sequence to sample the ADC. Must be less than 28 elements.
async fn set_sample_sequence(&self, sequence: &[u8]) {
assert!(sequence.len() <= 28);
let mut iter = sequence.iter();
T::regs().sqr1().modify(|w| w.set_l((sequence.len() - 1) as _));
for (idx, ch) in iter.by_ref().take(6).enumerate() {
T::regs().sqr5().modify(|w| w.set_sq(idx, *ch));
}
for (idx, ch) in iter.by_ref().take(6).enumerate() {
T::regs().sqr4().modify(|w| w.set_sq(idx, *ch));
}
for (idx, ch) in iter.by_ref().take(6).enumerate() {
T::regs().sqr3().modify(|w| w.set_sq(idx, *ch));
}
for (idx, ch) in iter.by_ref().take(6).enumerate() {
T::regs().sqr2().modify(|w| w.set_sq(idx, *ch));
}
for (idx, ch) in iter.by_ref().take(4).enumerate() {
T::regs().sqr1().modify(|w| w.set_sq(idx, *ch));
}
}
fn get_res_clks(res: Resolution) -> u32 {
match res {
Resolution::TwelveBit => 12,
Resolution::TenBit => 11,
Resolution::EightBit => 9,
Resolution::SixBit => 7,
}
}
fn get_sample_time_clks(sample_time: SampleTime) -> u32 {
match sample_time {
SampleTime::Cycles4 => 4,
SampleTime::Cycles9 => 9,
SampleTime::Cycles16 => 16,
SampleTime::Cycles24 => 24,
SampleTime::Cycles48 => 48,
SampleTime::Cycles96 => 96,
SampleTime::Cycles192 => 192,
SampleTime::Cycles384 => 384,
}
}
pub fn sample_time_for_us(&self, us: u32) -> SampleTime {
let res_clks = Self::get_res_clks(self.resolution());
let us_clks = us * Self::freq().0 / 1_000_000;
let clks = us_clks.saturating_sub(res_clks);
match clks {
0..=4 => SampleTime::Cycles4,
5..=9 => SampleTime::Cycles9,
10..=16 => SampleTime::Cycles16,
17..=24 => SampleTime::Cycles24,
25..=48 => SampleTime::Cycles48,
49..=96 => SampleTime::Cycles96,
97..=192 => SampleTime::Cycles192,
193.. => SampleTime::Cycles384,
}
}
pub fn us_for_cfg(&self, res: Resolution, sample_time: SampleTime) -> u32 {
let res_clks = Self::get_res_clks(res);
let sample_clks = Self::get_sample_time_clks(sample_time);
(res_clks + sample_clks) * 1_000_000 / Self::freq().0
}
}
impl<'d, T: Instance> Drop for Adc<'d, T> {
fn drop(&mut self) {
while !T::regs().sr().read().adons() {}
T::regs().cr2().modify(|w| w.set_adon(false));
T::disable();
}
}

View File

@ -3,6 +3,7 @@
#[cfg(not(adc_f3_v2))]
#[cfg_attr(adc_f1, path = "f1.rs")]
#[cfg_attr(adc_f3, path = "f3.rs")]
#[cfg_attr(adc_f3_v1_1, path = "f3_v1_1.rs")]
#[cfg_attr(adc_v1, path = "v1.rs")]
#[cfg_attr(adc_v2, path = "v2.rs")]
#[cfg_attr(any(adc_v3, adc_g0), path = "v3.rs")]
@ -26,20 +27,20 @@ use crate::peripherals;
pub struct Adc<'d, T: Instance> {
#[allow(unused)]
adc: crate::PeripheralRef<'d, T>,
#[cfg(not(adc_f3_v2))]
#[cfg(not(any(adc_f3_v2, adc_f3_v1_1)))]
sample_time: SampleTime,
}
pub(crate) mod sealed {
#[cfg(any(adc_f1, adc_f3, adc_v1))]
#[cfg(any(adc_f1, adc_f3, adc_v1, adc_f3_v1_1))]
use embassy_sync::waitqueue::AtomicWaker;
#[cfg(any(adc_f1, adc_f3, adc_v1))]
#[cfg(any(adc_f1, adc_f3, adc_v1, adc_f3_v1_1))]
pub struct State {
pub waker: AtomicWaker,
}
#[cfg(any(adc_f1, adc_f3, adc_v1))]
#[cfg(any(adc_f1, adc_f3, adc_v1, adc_f3_v1_1))]
impl State {
pub const fn new() -> Self {
Self {
@ -54,11 +55,11 @@ pub(crate) mod sealed {
pub trait Instance: InterruptableInstance {
fn regs() -> crate::pac::adc::Adc;
#[cfg(not(any(adc_f1, adc_v1, adc_f3_v2, adc_g0)))]
#[cfg(not(any(adc_f1, adc_v1, adc_f3_v2, adc_f3_v1_1, adc_g0)))]
fn common_regs() -> crate::pac::adccommon::AdcCommon;
#[cfg(adc_f3)]
fn frequency() -> crate::time::Hertz;
#[cfg(any(adc_f1, adc_f3, adc_v1))]
#[cfg(any(adc_f1, adc_f3, adc_v1, adc_f3_v1_1))]
fn state() -> &'static State;
}
@ -74,9 +75,9 @@ pub(crate) mod sealed {
}
}
#[cfg(not(any(adc_f1, adc_v1, adc_v2, adc_v3, adc_v4, adc_f3, adc_g0)))]
#[cfg(not(any(adc_f1, adc_v1, adc_v2, adc_v3, adc_v4, adc_f3, adc_f3_v1_1, adc_g0)))]
pub trait Instance: sealed::Instance + crate::Peripheral<P = Self> {}
#[cfg(any(adc_f1, adc_v1, adc_v2, adc_v3, adc_v4, adc_f3, adc_g0))]
#[cfg(any(adc_f1, adc_v1, adc_v2, adc_v3, adc_v4, adc_f3, adc_f3_v1_1, adc_g0))]
pub trait Instance: sealed::Instance + crate::Peripheral<P = Self> + crate::rcc::RccPeripheral {}
pub trait AdcPin<T: Instance>: sealed::AdcPin<T> {}
@ -89,7 +90,7 @@ foreach_adc!(
crate::pac::$inst
}
#[cfg(not(any(adc_f1, adc_v1, adc_f3_v2, adc_g0)))]
#[cfg(not(any(adc_f1, adc_v1, adc_f3_v2, adc_f3_v1_1, adc_g0)))]
fn common_regs() -> crate::pac::adccommon::AdcCommon {
return crate::pac::$common_inst
}
@ -99,7 +100,7 @@ foreach_adc!(
unsafe { crate::rcc::get_freqs() }.$clock.unwrap()
}
#[cfg(any(adc_f1, adc_f3, adc_v1))]
#[cfg(any(adc_f1, adc_f3, adc_v1, adc_f3_v1_1))]
fn state() -> &'static sealed::State {
static STATE: sealed::State = sealed::State::new();
&STATE

View File

@ -1,5 +1,6 @@
#[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3))]
#[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3, adc_f3_v1_1))]
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum Resolution {
TwelveBit,
TenBit,
@ -9,6 +10,7 @@ pub enum Resolution {
#[cfg(adc_v4)]
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum Resolution {
SixteenBit,
FourteenBit,
@ -19,7 +21,7 @@ pub enum Resolution {
impl Default for Resolution {
fn default() -> Self {
#[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3))]
#[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3, adc_f3_v1_1))]
{
Self::TwelveBit
}
@ -40,7 +42,7 @@ impl From<Resolution> for crate::pac::adc::vals::Res {
Resolution::TwelveBit => crate::pac::adc::vals::Res::TWELVEBIT,
Resolution::TenBit => crate::pac::adc::vals::Res::TENBIT,
Resolution::EightBit => crate::pac::adc::vals::Res::EIGHTBIT,
#[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3))]
#[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3, adc_f3_v1_1))]
Resolution::SixBit => crate::pac::adc::vals::Res::SIXBIT,
}
}
@ -56,7 +58,7 @@ impl Resolution {
Resolution::TwelveBit => (1 << 12) - 1,
Resolution::TenBit => (1 << 10) - 1,
Resolution::EightBit => (1 << 8) - 1,
#[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3))]
#[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3, adc_f3_v1_1))]
Resolution::SixBit => (1 << 6) - 1,
}
}

View File

@ -3,6 +3,7 @@ macro_rules! impl_sample_time {
($default_doc:expr, $default:ident, ($(($doc:expr, $variant:ident, $pac_variant:ident)),*)) => {
#[doc = concat!("ADC sample time\n\nThe default setting is ", $default_doc, " ADC clock cycles.")]
#[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum SampleTime {
$(
#[doc = concat!($doc, " ADC clock cycles.")]
@ -18,6 +19,14 @@ macro_rules! impl_sample_time {
}
}
impl From<crate::pac::adc::vals::SampleTime> for SampleTime {
fn from(sample_time: crate::pac::adc::vals::SampleTime) -> SampleTime {
match sample_time {
$(crate::pac::adc::vals::SampleTime::$pac_variant => SampleTime::$variant),*
}
}
}
impl Default for SampleTime {
fn default() -> Self {
Self::$default
@ -121,3 +130,19 @@ impl_sample_time!(
("601.5", Cycles601_5, CYCLES601_5)
)
);
#[cfg(any(adc_f3_v1_1))]
impl_sample_time!(
"4",
Cycles4,
(
("4", Cycles4, CYCLES4),
("9", Cycles9, CYCLES9),
("16", Cycles16, CYCLES16),
("24", Cycles24, CYCLES24),
("48", Cycles48, CYCLES48),
("96", Cycles96, CYCLES96),
("192", Cycles192, CYCLES192),
("384", Cycles384, CYCLES384)
)
);

View File

@ -1,6 +1,6 @@
#![macro_use]
#[cfg_attr(can_bxcan, path = "bxcan.rs")]
#[cfg_attr(can_fdcan, path = "fdcan.rs")]
#[cfg_attr(any(can_fdcan_v1, can_fdcan_h7), path = "fdcan.rs")]
mod _version;
pub use _version::*;

View File

@ -90,6 +90,29 @@ pub use crate::_generated::interrupt;
/// This defines the right interrupt handlers, and creates a unit struct (like `struct Irqs;`)
/// and implements the right [`Binding`]s for it. You can pass this struct to drivers to
/// prove at compile-time that the right interrupts have been bound.
///
/// Example of how to bind one interrupt:
///
/// ```rust,ignore
/// use embassy_stm32::{bind_interrupts, usb_otg, peripherals};
///
/// bind_interrupts!(struct Irqs {
/// OTG_FS => usb_otg::InterruptHandler<peripherals::USB_OTG_FS>;
/// });
/// ```
///
/// Example of how to bind multiple interrupts, and multiple handlers to each interrupt, in a single macro invocation:
///
/// ```rust,ignore
/// use embassy_stm32::{bind_interrupts, i2c, peripherals};
///
/// bind_interrupts!(struct Irqs {
/// I2C1 => i2c::EventInterruptHandler<peripherals::I2C1>, i2c::ErrorInterruptHandler<peripherals::I2C1>;
/// I2C2_3 => i2c::EventInterruptHandler<peripherals::I2C2>, i2c::ErrorInterruptHandler<peripherals::I2C2>,
/// i2c::EventInterruptHandler<peripherals::I2C3>, i2c::ErrorInterruptHandler<peripherals::I2C3>;
/// });
/// ```
// developer note: this macro can't be in `embassy-hal-internal` due to the use of `$crate`.
#[macro_export]
macro_rules! bind_interrupts {

View File

@ -308,6 +308,7 @@ pub(crate) unsafe fn init(config: Config) {
sys: sys_clk,
hclk1: ahb_freq,
hclk2: ahb_freq,
hclk3: ahb_freq,
pclk1: apb1_freq,
pclk1_tim: apb1_tim_freq,
pclk2: apb2_freq,
@ -315,6 +316,8 @@ pub(crate) unsafe fn init(config: Config) {
adc: adc12_ck,
adc34: adc345_ck,
pll1_p: None,
pll1_q: None, // TODO
hse: None, // TODO
rtc,
});
}

View File

@ -95,6 +95,7 @@ pub struct Clocks {
rcc_h7rm0433,
rcc_h7ab,
rcc_u5,
rcc_g4,
rcc_wb,
rcc_wl5,
rcc_wle
@ -119,7 +120,7 @@ pub struct Clocks {
#[cfg(any(stm32g4, rcc_l4))]
pub pll1_p: Option<Hertz>,
#[cfg(any(stm32h5, stm32h7, rcc_f2, rcc_f4, rcc_f410, rcc_f7, rcc_l4))]
#[cfg(any(stm32h5, stm32h7, stm32f2, stm32f4, stm32f7, rcc_l4, stm32g4))]
pub pll1_q: Option<Hertz>,
#[cfg(any(stm32h5, stm32h7))]
pub pll2_p: Option<Hertz>,
@ -167,7 +168,7 @@ pub struct Clocks {
#[cfg(any(stm32h5, stm32h7, rcc_l4, rcc_c0))]
pub lse: Option<Hertz>,
#[cfg(any(stm32h5, stm32h7))]
#[cfg(any(stm32h5, stm32h7, stm32g4))]
pub hse: Option<Hertz>,
#[cfg(stm32h5)]

View File

@ -263,7 +263,7 @@ impl<'d, T: Instance> Driver<'d, T> {
let regs = T::regs();
#[cfg(stm32l5)]
#[cfg(any(stm32l5, stm32wb))]
crate::pac::PWR.cr2().modify(|w| w.set_usv(true));
#[cfg(pwr_h5)]

View File

@ -10,14 +10,14 @@ stm32c031c6 = ["embassy-stm32/stm32c031c6", "cm0", "not-gpdma"]
stm32f103c8 = ["embassy-stm32/stm32f103c8", "not-gpdma"]
stm32f207zg = ["embassy-stm32/stm32f207zg", "chrono", "not-gpdma", "eth", "rng"]
stm32f303ze = ["embassy-stm32/stm32f303ze", "chrono", "not-gpdma"]
stm32f429zi = ["embassy-stm32/stm32f429zi", "chrono", "eth", "stop", "can", "not-gpdma", "dac-adc-pin", "rng"]
stm32f446re = ["embassy-stm32/stm32f446re", "chrono", "stop", "can", "not-gpdma", "dac-adc-pin", "sdmmc"]
stm32f429zi = ["embassy-stm32/stm32f429zi", "chrono", "eth", "stop", "can", "not-gpdma", "dac", "rng"]
stm32f446re = ["embassy-stm32/stm32f446re", "chrono", "stop", "can", "not-gpdma", "dac", "sdmmc"]
stm32f767zi = ["embassy-stm32/stm32f767zi", "chrono", "not-gpdma", "eth", "rng"]
stm32g071rb = ["embassy-stm32/stm32g071rb", "cm0", "not-gpdma", "dac-adc-pin"]
stm32g071rb = ["embassy-stm32/stm32g071rb", "cm0", "not-gpdma", "dac"]
stm32g491re = ["embassy-stm32/stm32g491re", "chrono", "stop", "not-gpdma", "rng"]
stm32h563zi = ["embassy-stm32/stm32h563zi", "chrono", "eth", "rng"]
stm32h753zi = ["embassy-stm32/stm32h753zi", "chrono", "not-gpdma", "eth", "rng"]
stm32h755zi = ["embassy-stm32/stm32h755zi-cm7", "chrono", "not-gpdma", "eth", "dac-adc-pin", "rng"]
stm32h755zi = ["embassy-stm32/stm32h755zi-cm7", "chrono", "not-gpdma", "eth", "dac", "rng"]
stm32h7a3zi = ["embassy-stm32/stm32h7a3zi", "not-gpdma", "rng"]
stm32l073rz = ["embassy-stm32/stm32l073rz", "cm0", "not-gpdma", "rng"]
stm32l152re = ["embassy-stm32/stm32l152re", "chrono", "not-gpdma"]
@ -41,7 +41,7 @@ ble = ["dep:embassy-stm32-wpan", "embassy-stm32-wpan/ble"]
mac = ["dep:embassy-stm32-wpan", "embassy-stm32-wpan/mac"]
embassy-stm32-wpan = []
not-gpdma = []
dac-adc-pin = []
dac = []
cm0 = ["portable-atomic/unsafe-assume-single-core"]
@ -84,7 +84,12 @@ required-features = [ "can",]
[[bin]]
name = "dac"
path = "src/bin/dac.rs"
required-features = [ "dac-adc-pin",]
required-features = [ "dac",]
[[bin]]
name = "dac_l1"
path = "src/bin/dac_l1.rs"
required-features = [ "stm32l152re",]
[[bin]]
name = "eth"

View File

@ -1,7 +1,7 @@
#![no_std]
#![no_main]
// required-features: dac-adc-pin
// required-features: dac
#[path = "../common.rs"]
mod common;
@ -22,12 +22,13 @@ async fn main(_spawner: Spawner) {
// Initialize the board and obtain a Peripherals instance
let p: embassy_stm32::Peripherals = embassy_stm32::init(config());
let adc = peri!(p, ADC);
let dac = peri!(p, DAC);
let dac_pin = peri!(p, DAC_PIN);
let mut adc_pin = unsafe { core::ptr::read(&dac_pin) };
let mut dac = DacCh1::new(dac, NoDma, dac_pin);
let mut adc = Adc::new(p.ADC1, &mut Delay);
let mut adc = Adc::new(adc, &mut Delay);
#[cfg(feature = "stm32h755zi")]
let normalization_factor = 256;

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@ -0,0 +1,86 @@
#![no_std]
#![no_main]
// required-features: stm32l152re
#[path = "../common.rs"]
mod common;
use core::f32::consts::PI;
use common::*;
use defmt::assert;
use embassy_executor::Spawner;
use embassy_stm32::adc::Adc;
use embassy_stm32::dac::{DacCh1, Value};
use embassy_stm32::dma::NoDma;
use embassy_stm32::{bind_interrupts, peripherals};
use embassy_time::Timer;
use micromath::F32Ext;
use {defmt_rtt as _, panic_probe as _};
bind_interrupts!(struct Irqs {
ADC1 => embassy_stm32::adc::InterruptHandler<peripherals::ADC>;
});
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
// Initialize the board and obtain a Peripherals instance
let p: embassy_stm32::Peripherals = embassy_stm32::init(config());
let adc = peri!(p, ADC);
let dac = peri!(p, DAC);
let dac_pin = peri!(p, DAC_PIN);
let mut adc_pin = unsafe { core::ptr::read(&dac_pin) };
let mut dac = DacCh1::new(dac, NoDma, dac_pin);
let mut adc = Adc::new(adc, Irqs);
#[cfg(feature = "stm32h755zi")]
let normalization_factor = 256;
#[cfg(any(
feature = "stm32f429zi",
feature = "stm32f446re",
feature = "stm32g071rb",
feature = "stm32l152re",
))]
let normalization_factor: i32 = 16;
dac.set(Value::Bit8(0));
// Now wait a little to obtain a stable value
Timer::after_millis(30).await;
let offset = adc.read(&mut adc_pin).await;
for v in 0..=255 {
// First set the DAC output value
let dac_output_val = to_sine_wave(v);
dac.set(Value::Bit8(dac_output_val));
// Now wait a little to obtain a stable value
Timer::after_millis(30).await;
// Need to steal the peripherals here because PA4 is obviously in use already
let measured = adc.read(&mut unsafe { embassy_stm32::Peripherals::steal() }.PA4).await;
// Calibrate and normalize the measurement to get close to the dac_output_val
let measured_normalized = ((measured as i32 - offset as i32) / normalization_factor) as i16;
info!("value / measured: {} / {}", dac_output_val, measured_normalized);
// The deviations are quite enormous but that does not matter since this is only a quick test
assert!((dac_output_val as i16 - measured_normalized).abs() < 15);
}
info!("Test OK");
cortex_m::asm::bkpt();
}
fn to_sine_wave(v: u8) -> u8 {
if v >= 128 {
// top half
let r = PI * ((v - 128) as f32 / 128.0);
(r.sin() * 128.0 + 127.0) as u8
} else {
// bottom half
let r = PI + PI * (v as f32 / 128.0);
(r.sin() * 128.0 + 127.0) as u8
}
}

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@ -101,14 +101,14 @@ define_peris!(
define_peris!(
UART = USART1, UART_TX = PC4, UART_RX = PC5, UART_TX_DMA = DMA1_CH1, UART_RX_DMA = DMA1_CH2,
SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA1_CH1, SPI_RX_DMA = DMA1_CH2,
DAC = DAC1, DAC_PIN = PA4,
ADC = ADC1, DAC = DAC1, DAC_PIN = PA4,
@irq UART = {USART1 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART1>;},
);
#[cfg(feature = "stm32f429zi")]
define_peris!(
UART = USART6, UART_TX = PG14, UART_RX = PG9, UART_TX_DMA = DMA2_CH6, UART_RX_DMA = DMA2_CH1,
SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA2_CH3, SPI_RX_DMA = DMA2_CH2,
DAC = DAC, DAC_PIN = PA4,
ADC = ADC1, DAC = DAC, DAC_PIN = PA4,
CAN = CAN1, CAN_RX = PD0, CAN_TX = PD1,
@irq UART = {USART6 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART6>;},
);
@ -116,7 +116,7 @@ define_peris!(
define_peris!(
UART = USART1, UART_TX = PA9, UART_RX = PA10, UART_TX_DMA = DMA2_CH7, UART_RX_DMA = DMA2_CH5,
SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA2_CH3, SPI_RX_DMA = DMA2_CH2,
DAC = DAC, DAC_PIN = PA4,
ADC = ADC1, DAC = DAC, DAC_PIN = PA4,
CAN = CAN1, CAN_RX = PA11, CAN_TX = PA12,
@irq UART = {USART1 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART1>;},
);
@ -130,7 +130,7 @@ define_peris!(
define_peris!(
UART = USART1, UART_TX = PB6, UART_RX = PB7, UART_TX_DMA = DMA1_CH0, UART_RX_DMA = DMA1_CH1,
SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PB5, SPI_MISO = PA6, SPI_TX_DMA = DMA1_CH0, SPI_RX_DMA = DMA1_CH1,
DAC = DAC1, DAC_PIN = PA4,
ADC = ADC1, DAC = DAC1, DAC_PIN = PA4,
@irq UART = {USART1 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART1>;},
);
#[cfg(feature = "stm32h7a3zi")]
@ -191,6 +191,7 @@ define_peris!(
define_peris!(
UART = USART3, UART_TX = PB10, UART_RX = PB11, UART_TX_DMA = DMA1_CH2, UART_RX_DMA = DMA1_CH3,
SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA1_CH3, SPI_RX_DMA = DMA1_CH2,
ADC = ADC, DAC = DAC, DAC_PIN = PA4,
@irq UART = {USART3 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART3>;},
);
#[cfg(feature = "stm32l552ze")]