unused pipe

2sem_i2c/.cargo/config.toml

@@ -0,0 +1,15 @@
+[build]
+target = "thumbv8m.main-none-eabihf"
+
+[target.thumbv8m.main-none-eabihf]
+runner = "probe-rs run --chip STM32U575ZITxQ"
+
+rustflags = [
+  "-C", "linker=rust-lld",
+  "-C", "link-arg=-Tlink.x",
+  "-C", "link-arg=-Tdefmt.x",
+  "-C", "link-arg=--nmagic",
+]
+
+[package.metadata.cargo-flash]
+chip = "STM32U575ZIT"

2sem_i2c/.gitignore

@@ -0,0 +1 @@
+/target

2sem_i2c/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+authors = ["Priec <filippriec@gmail.com>"]
+name = "hal_rng"
+edition = "2024"
+version = "0.1.0"
+
+
+[dependencies]
+cortex-m = { version = "0.7.7", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = "0.7.5"
+panic-halt = "1.0.0"
+
+embassy-executor = { version = "0.9.1", features = ["arch-cortex-m", "executor-thread"] }
+embassy-futures = "0.1.2"
+embassy-stm32 = { version = "0.4.0", features = ["unstable-pac", "stm32u575zi", "time-driver-any", "memory-x", "defmt"] }
+embassy-sync = "0.7.2"
+embassy-time = { version = "0.5.0", features = ["tick-hz-32_768"] }
+embassy-usb = "0.5.1"
+
+embedded-hal = "1.0.0"
+embedded-graphics = "0.8.1"
+heapless = { version = "0.9.1", default-features = false }
+micromath = "2.1.0"
+tinybmp = "0.6.0"
+panic-probe = { version = "1.0.0", features = ["defmt"] }
+defmt-rtt = "1.1.0"
+defmt = "1.0.1"
+static_cell = "2.1.1"
+embedded-io-async = "0.6.0"
+embedded-io = "0.6.1"

2sem_i2c/LICENSE-APACHE

@@ -0,0 +1,201 @@
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+limitations under the License.

2sem_i2c/LICENSE-MIT

@@ -0,0 +1,23 @@
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

2sem_i2c/Makefile

@@ -0,0 +1,23 @@
+TARGET = thumbv8m.main-none-eabihf
+CHIP = STM32U575ZI
+BIN = stm32u5-blinky
+MODE ?= release
+TARGET_DIR = target/$(TARGET)/$(MODE)
+ELF = $(TARGET_DIR)/$(BIN)
+PROBE = probe-rs
+
+.PHONY: all build flash clean empty
+
+all: build
+
+build:
+	cargo build --$(MODE)
+
+flash: build
+	$(PROBE) run --chip $(CHIP) $(ELF)
+
+empty:
+	$(PROBE) erase --chip $(CHIP)
+
+clean:
+	cargo clean

2sem_i2c/README.md

@@ -0,0 +1,232 @@
+# `app-template`
+
+> Quickly set up a [`probe-rs`] + [`defmt`] + [`flip-link`] embedded project
+
+[`probe-rs`]: https://crates.io/crates/probe-rs
+[`defmt`]: https://github.com/knurling-rs/defmt
+[`flip-link`]: https://github.com/knurling-rs/flip-link
+
+## Dependencies
+
+### 1. `flip-link`:
+
+```bash
+cargo install flip-link
+```
+
+### 2. `probe-rs`:
+
+Install probe-rs by following the instructions at <https://probe.rs/docs/getting-started/installation/>.
+
+### 3. [`cargo-generate`]:
+
+```bash
+cargo install cargo-generate
+```
+
+[`cargo-generate`]: https://crates.io/crates/cargo-generate
+
+> *Note:* You can also just clone this repository instead of using `cargo-generate`, but this involves additional manual adjustments.
+
+## Setup
+
+### 1. Initialize the project template
+
+```bash
+cargo generate \
+    --git https://github.com/knurling-rs/app-template \
+    --branch main \
+    --name my-app
+```
+
+If you look into your new `my-app` folder, you'll find that there are a few `TODO`s in the files marking the properties you need to set.
+
+Let's walk through them together now.
+
+### 2. Set `probe-rs` chip
+
+Pick a chip from ` probe-rs chip list` and enter it into `.cargo/config.toml`.
+
+If, for example, you have a nRF52840 Development Kit as used in one of [our exercises], replace `{{chip}}` with `nRF52840_xxAA`.
+
+[our workshops]: https://rust-exercises.ferrous-systems.com
+
+```diff
+ # .cargo/config.toml
+-runner = ["probe-rs", "run", "--chip", "$CHIP", "--log-format=oneline"]
++runner = ["probe-rs", "run", "--chip", "nRF52840_xxAA", "--log-format=oneline"]
+```
+
+### 3. Adjust the compilation target
+
+In `.cargo/config.toml`, pick the right compilation target for your board.
+
+```diff
+ # .cargo/config.toml
+ [build]
+-target = "thumbv6m-none-eabi"    # Cortex-M0 and Cortex-M0+
+-# target = "thumbv7m-none-eabi"    # Cortex-M3
+-# target = "thumbv7em-none-eabi"   # Cortex-M4 and Cortex-M7 (no FPU)
+-# target = "thumbv7em-none-eabihf" # Cortex-M4F and Cortex-M7F (with FPU)
++target = "thumbv7em-none-eabihf" # Cortex-M4F (with FPU)
+```
+
+Add the target with `rustup`.
+
+```bash
+rustup target add thumbv7em-none-eabihf
+```
+
+### 4. Add a HAL as a dependency
+
+In `Cargo.toml`, list the Hardware Abstraction Layer (HAL) for your board as a dependency.
+
+For the nRF52840 you'll want to use the [`nrf52840-hal`].
+
+[`nrf52840-hal`]: https://crates.io/crates/nrf52840-hal
+
+```diff
+ # Cargo.toml
+ [dependencies]
+-# some-hal = "1.2.3"
++nrf52840-hal = "0.14.0"
+```
+
+⚠️ Note for RP2040 users ⚠️
+
+You will need to not just specify the `rp-hal` HAL, but a BSP (board support crate) which includes a second stage bootloader. Please find a list of available BSPs [here](https://github.com/rp-rs/rp-hal-boards#packages).
+
+### 5. Import your HAL
+
+Now that you have selected a HAL, fix the HAL import in `src/lib.rs`
+
+```diff
+ // my-app/src/lib.rs
+-// use some_hal as _; // memory layout
++use nrf52840_hal as _; // memory layout
+```
+
+### (6. Get a linker script)
+
+Some HAL crates require that you manually copy over a file called `memory.x` from the HAL to the root of your project. For nrf52840-hal, this is done automatically so no action is needed. For other HAL crates, see their documentation on where to find an example file.
+
+The `memory.x` file should look something like:
+
+```text
+MEMORY
+{
+  FLASH : ORIGIN = 0x00000000, LENGTH = 1024K
+  RAM   : ORIGIN = 0x20000000, LENGTH = 256K
+}
+```
+
+The `memory.x` file is included in the `cortex-m-rt` linker script `link.x`, and so `link.x` is the one you should tell `rustc` to use (see the `.cargo/config.toml` file where we do that).
+
+### 7. Run!
+
+You are now all set to `cargo-run` your first `defmt`-powered application!
+There are some examples in the `src/bin` directory.
+
+Start by `cargo run`-ning `my-app/src/bin/hello.rs`:
+
+```console
+$ # `rb` is an alias for `run --bin`
+$ cargo rb hello
+    Finished `dev` profile [optimized + debuginfo] target(s) in 0.01s
+     Running `probe-rs run --chip nrf52840_xxaa --log-format=oneline target/thumbv6m-none-eabi/debug/hello`
+      Erasing ✔ 100% [####################]   8.00 KiB @  15.79 KiB/s (took 1s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.19 KiB/s (took 1s)                                                                                                                        Finished in 1.11s
+Hello, world!
+
+$ echo $?
+0
+```
+
+If you're running out of memory (`flip-link` bails with an overflow error), you can decrease the size of the device memory buffer by setting the `DEFMT_RTT_BUFFER_SIZE` environment variable. The default value is 1024 bytes, and powers of two should be used for optimal performance:
+
+```console
+$ DEFMT_RTT_BUFFER_SIZE=64 cargo rb hello
+```
+
+### (8. Set `rust-analyzer.linkedProjects`)
+
+If you are using [rust-analyzer] with VS Code for IDE-like features you can add following configuration to your `.vscode/settings.json` to make it work transparently across workspaces. Find the details of this option in the [RA docs].
+
+```json
+{
+    "rust-analyzer.linkedProjects": [
+        "Cargo.toml",
+        "firmware/Cargo.toml",
+    ]
+}
+```
+
+[RA docs]: https://rust-analyzer.github.io/manual.html#configuration
+[rust-analyzer]: https://rust-analyzer.github.io/
+
+## Running tests
+
+The template comes configured for running unit tests and integration tests on the target.
+
+Unit tests reside in the library crate and can test private API; the initial set of unit tests are in `src/lib.rs`.
+`cargo test --lib` will run those unit tests.
+
+```console
+$ cargo test --lib
+   Compiling example v0.1.0 (./knurling-rs/example)
+    Finished `test` profile [optimized + debuginfo] target(s) in 0.15s
+     Running unittests src/lib.rs (target/thumbv6m-none-eabi/debug/deps/example-2b0d0e25d141bf57)
+      Erasing ✔ 100% [####################]   8.00 KiB @  15.99 KiB/s (took 1s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.33 KiB/s (took 1s)                                                                                                                        Finished in 1.10s
+(1/1) running `it_works`...
+all tests passed!
+```
+
+Integration tests reside in the `tests` directory; the initial set of integration tests are in `tests/integration.rs`.
+`cargo test --test integration` will run those integration tests.
+Note that the argument of the `--test` flag must match the name of the test file in the `tests` directory.
+
+```console
+$ cargo test --test integration
+   Compiling example v0.1.0 (./knurling-rs/example)
+    Finished `test` profile [optimized + debuginfo] target(s) in 0.10s
+     Running tests/integration.rs (target/thumbv6m-none-eabi/debug/deps/integration-aaaff41151f6a722)
+      Erasing ✔ 100% [####################]   8.00 KiB @  16.03 KiB/s (took 0s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.19 KiB/s (took 1s)                                                                                                                        Finished in 1.11s
+(1/1) running `it_works`...
+all tests passed!
+```
+
+Note that to add a new test file to the `tests` directory you also need to add a new `[[test]]` section to `Cargo.toml`.
+
+To run all the tests via `cargo test` the tests need to be explicitly disabled for all the existing binary targets.
+See `Cargo.toml` for details on how to do this.
+
+## Support
+
+`app-template` is part of the [Knurling] project, [Ferrous Systems]' effort at
+improving tooling used to develop for embedded systems.
+
+If you think that our work is useful, consider sponsoring it via [GitHub
+Sponsors].
+
+## License
+
+Licensed under either of
+
+- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
+  http://www.apache.org/licenses/LICENSE-2.0)
+
+- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+licensed as above, without any additional terms or conditions.
+
+[Knurling]: https://knurling.ferrous-systems.com
+[Ferrous Systems]: https://ferrous-systems.com/
+[GitHub Sponsors]: https://github.com/sponsors/knurling-rs

2sem_i2c/src/bin/main.rs

@@ -0,0 +1,46 @@
+// src/bin/main.rs
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::i2c::{Config, I2c};
+use embassy_time::{Duration, Timer};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    info!("tititi");
+
+    let p = embassy_stm32::init(Default::default());
+
+    let mut i2c_cfg = Config::default();
+    i2c_cfg.sda_pullup = true;
+    i2c_cfg.scl_pullup = true;
+    i2c_cfg.timeout = Duration::from_millis(200);
+
+    let mut i2c = I2c::new_blocking(p.I2C3, p.PC0, p.PC1, i2c_cfg);
+    let addr = 0x23;
+
+    if let Err(e) = i2c.blocking_write(addr, &[0x01, 0x79]) {
+        error!("Nepodarilo sa aktivovať CMM: {:?}", e);
+    }
+
+    loop {
+        let mut raw = [0u8; 9];
+        match i2c.blocking_write_read(addr, &[0x24], &mut raw) {
+            Ok(_) => {
+                let x = i32::from_be_bytes([raw[0], raw[1], raw[2], 0]) >> 8;
+                let y = i32::from_be_bytes([raw[3], raw[4], raw[5], 0]) >> 8;
+                let z = i32::from_be_bytes([raw[6], raw[7], raw[8], 0]) >> 8;
+                info!("X: {}, Y: {}, Z: {}", x, y, z);
+            }
+            Err(e) => {
+                error!("Chyba pri čítaní: {:?}", e);
+            }
+        }
+
+        // Čítajte napríklad každých 100ms. Dáta v registroch budú vždy najaktuálnejšie dokončené meranie.
+        Timer::after(Duration::from_millis(100)).await;
+    }
+}

2sem_i2c/src/lib.rs

@@ -0,0 +1 @@
+#![no_std]

2sem_i2c/tests/integration.rs

@@ -0,0 +1,16 @@
+#![no_std]
+#![no_main]
+
+use stm32u5_blinky as _; // memory layout + panic handler
+
+// See https://crates.io/crates/defmt-test/0.3.0 for more documentation (e.g. about the 'state'
+// feature)
+#[defmt_test::tests]
+mod tests {
+    use defmt::assert;
+
+    #[test]
+    fn it_works() {
+        assert!(true)
+    }
+}

2sem_sem2/.cargo/config.toml

@@ -0,0 +1,15 @@
+[build]
+target = "thumbv8m.main-none-eabihf"
+
+[target.thumbv8m.main-none-eabihf]
+runner = "probe-rs run --chip STM32U575ZITxQ"
+
+rustflags = [
+  "-C", "linker=rust-lld",
+  "-C", "link-arg=-Tlink.x",
+  "-C", "link-arg=-Tdefmt.x",
+  "-C", "link-arg=--nmagic",
+]
+
+[package.metadata.cargo-flash]
+chip = "STM32U575ZIT"

2sem_sem2/.gitignore

@@ -0,0 +1,2 @@
+/target
+x.txt

2sem_sem2/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+authors = ["Priec <filippriec@gmail.com>"]
+name = "semestralka2"
+edition = "2024"
+version = "0.1.0"
+
+
+[dependencies]
+cortex-m = { version = "0.7.7", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = "0.7.5"
+panic-halt = "1.0.0"
+
+embassy-executor = { version = "0.9.1", features = ["arch-cortex-m", "executor-thread"] }
+embassy-futures = "0.1.2"
+embassy-stm32 = { version = "0.4.0", features = ["unstable-pac", "stm32u575zi", "time-driver-any", "memory-x", "defmt", "exti"] }
+embassy-sync = "0.7.2"
+embassy-time = { version = "0.5.0", features = ["tick-hz-32_768"] }
+embassy-usb = "0.5.1"
+
+embedded-hal = "1.0.0"
+embedded-graphics = "0.8.1"
+heapless = { version = "0.9.1", default-features = false, features = ["defmt"] }
+micromath = "2.1.0"
+tinybmp = "0.6.0"
+panic-probe = { version = "1.0.0", features = ["defmt"] }
+defmt-rtt = "1.1.0"
+defmt = "1.0.1"
+static_cell = "2.1.1"
+embedded-io-async = "0.6.0"
+embedded-io = "0.6.1"

2sem_sem2/LICENSE-APACHE

@@ -0,0 +1,201 @@
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+limitations under the License.

2sem_sem2/LICENSE-MIT

@@ -0,0 +1,23 @@
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

2sem_sem2/Makefile

@@ -0,0 +1,23 @@
+TARGET = thumbv8m.main-none-eabihf
+CHIP = STM32U575ZI
+BIN = stm32u5-blinky
+MODE ?= release
+TARGET_DIR = target/$(TARGET)/$(MODE)
+ELF = $(TARGET_DIR)/$(BIN)
+PROBE = probe-rs
+
+.PHONY: all build flash clean empty
+
+all: build
+
+build:
+	cargo build --$(MODE)
+
+flash: build
+	$(PROBE) run --chip $(CHIP) $(ELF)
+
+empty:
+	$(PROBE) erase --chip $(CHIP)
+
+clean:
+	cargo clean

2sem_sem2/README.md

@@ -0,0 +1,232 @@
+# `app-template`
+
+> Quickly set up a [`probe-rs`] + [`defmt`] + [`flip-link`] embedded project
+
+[`probe-rs`]: https://crates.io/crates/probe-rs
+[`defmt`]: https://github.com/knurling-rs/defmt
+[`flip-link`]: https://github.com/knurling-rs/flip-link
+
+## Dependencies
+
+### 1. `flip-link`:
+
+```bash
+cargo install flip-link
+```
+
+### 2. `probe-rs`:
+
+Install probe-rs by following the instructions at <https://probe.rs/docs/getting-started/installation/>.
+
+### 3. [`cargo-generate`]:
+
+```bash
+cargo install cargo-generate
+```
+
+[`cargo-generate`]: https://crates.io/crates/cargo-generate
+
+> *Note:* You can also just clone this repository instead of using `cargo-generate`, but this involves additional manual adjustments.
+
+## Setup
+
+### 1. Initialize the project template
+
+```bash
+cargo generate \
+    --git https://github.com/knurling-rs/app-template \
+    --branch main \
+    --name my-app
+```
+
+If you look into your new `my-app` folder, you'll find that there are a few `TODO`s in the files marking the properties you need to set.
+
+Let's walk through them together now.
+
+### 2. Set `probe-rs` chip
+
+Pick a chip from ` probe-rs chip list` and enter it into `.cargo/config.toml`.
+
+If, for example, you have a nRF52840 Development Kit as used in one of [our exercises], replace `{{chip}}` with `nRF52840_xxAA`.
+
+[our workshops]: https://rust-exercises.ferrous-systems.com
+
+```diff
+ # .cargo/config.toml
+-runner = ["probe-rs", "run", "--chip", "$CHIP", "--log-format=oneline"]
++runner = ["probe-rs", "run", "--chip", "nRF52840_xxAA", "--log-format=oneline"]
+```
+
+### 3. Adjust the compilation target
+
+In `.cargo/config.toml`, pick the right compilation target for your board.
+
+```diff
+ # .cargo/config.toml
+ [build]
+-target = "thumbv6m-none-eabi"    # Cortex-M0 and Cortex-M0+
+-# target = "thumbv7m-none-eabi"    # Cortex-M3
+-# target = "thumbv7em-none-eabi"   # Cortex-M4 and Cortex-M7 (no FPU)
+-# target = "thumbv7em-none-eabihf" # Cortex-M4F and Cortex-M7F (with FPU)
++target = "thumbv7em-none-eabihf" # Cortex-M4F (with FPU)
+```
+
+Add the target with `rustup`.
+
+```bash
+rustup target add thumbv7em-none-eabihf
+```
+
+### 4. Add a HAL as a dependency
+
+In `Cargo.toml`, list the Hardware Abstraction Layer (HAL) for your board as a dependency.
+
+For the nRF52840 you'll want to use the [`nrf52840-hal`].
+
+[`nrf52840-hal`]: https://crates.io/crates/nrf52840-hal
+
+```diff
+ # Cargo.toml
+ [dependencies]
+-# some-hal = "1.2.3"
++nrf52840-hal = "0.14.0"
+```
+
+⚠️ Note for RP2040 users ⚠️
+
+You will need to not just specify the `rp-hal` HAL, but a BSP (board support crate) which includes a second stage bootloader. Please find a list of available BSPs [here](https://github.com/rp-rs/rp-hal-boards#packages).
+
+### 5. Import your HAL
+
+Now that you have selected a HAL, fix the HAL import in `src/lib.rs`
+
+```diff
+ // my-app/src/lib.rs
+-// use some_hal as _; // memory layout
++use nrf52840_hal as _; // memory layout
+```
+
+### (6. Get a linker script)
+
+Some HAL crates require that you manually copy over a file called `memory.x` from the HAL to the root of your project. For nrf52840-hal, this is done automatically so no action is needed. For other HAL crates, see their documentation on where to find an example file.
+
+The `memory.x` file should look something like:
+
+```text
+MEMORY
+{
+  FLASH : ORIGIN = 0x00000000, LENGTH = 1024K
+  RAM   : ORIGIN = 0x20000000, LENGTH = 256K
+}
+```
+
+The `memory.x` file is included in the `cortex-m-rt` linker script `link.x`, and so `link.x` is the one you should tell `rustc` to use (see the `.cargo/config.toml` file where we do that).
+
+### 7. Run!
+
+You are now all set to `cargo-run` your first `defmt`-powered application!
+There are some examples in the `src/bin` directory.
+
+Start by `cargo run`-ning `my-app/src/bin/hello.rs`:
+
+```console
+$ # `rb` is an alias for `run --bin`
+$ cargo rb hello
+    Finished `dev` profile [optimized + debuginfo] target(s) in 0.01s
+     Running `probe-rs run --chip nrf52840_xxaa --log-format=oneline target/thumbv6m-none-eabi/debug/hello`
+      Erasing ✔ 100% [####################]   8.00 KiB @  15.79 KiB/s (took 1s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.19 KiB/s (took 1s)                                                                                                                        Finished in 1.11s
+Hello, world!
+
+$ echo $?
+0
+```
+
+If you're running out of memory (`flip-link` bails with an overflow error), you can decrease the size of the device memory buffer by setting the `DEFMT_RTT_BUFFER_SIZE` environment variable. The default value is 1024 bytes, and powers of two should be used for optimal performance:
+
+```console
+$ DEFMT_RTT_BUFFER_SIZE=64 cargo rb hello
+```
+
+### (8. Set `rust-analyzer.linkedProjects`)
+
+If you are using [rust-analyzer] with VS Code for IDE-like features you can add following configuration to your `.vscode/settings.json` to make it work transparently across workspaces. Find the details of this option in the [RA docs].
+
+```json
+{
+    "rust-analyzer.linkedProjects": [
+        "Cargo.toml",
+        "firmware/Cargo.toml",
+    ]
+}
+```
+
+[RA docs]: https://rust-analyzer.github.io/manual.html#configuration
+[rust-analyzer]: https://rust-analyzer.github.io/
+
+## Running tests
+
+The template comes configured for running unit tests and integration tests on the target.
+
+Unit tests reside in the library crate and can test private API; the initial set of unit tests are in `src/lib.rs`.
+`cargo test --lib` will run those unit tests.
+
+```console
+$ cargo test --lib
+   Compiling example v0.1.0 (./knurling-rs/example)
+    Finished `test` profile [optimized + debuginfo] target(s) in 0.15s
+     Running unittests src/lib.rs (target/thumbv6m-none-eabi/debug/deps/example-2b0d0e25d141bf57)
+      Erasing ✔ 100% [####################]   8.00 KiB @  15.99 KiB/s (took 1s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.33 KiB/s (took 1s)                                                                                                                        Finished in 1.10s
+(1/1) running `it_works`...
+all tests passed!
+```
+
+Integration tests reside in the `tests` directory; the initial set of integration tests are in `tests/integration.rs`.
+`cargo test --test integration` will run those integration tests.
+Note that the argument of the `--test` flag must match the name of the test file in the `tests` directory.
+
+```console
+$ cargo test --test integration
+   Compiling example v0.1.0 (./knurling-rs/example)
+    Finished `test` profile [optimized + debuginfo] target(s) in 0.10s
+     Running tests/integration.rs (target/thumbv6m-none-eabi/debug/deps/integration-aaaff41151f6a722)
+      Erasing ✔ 100% [####################]   8.00 KiB @  16.03 KiB/s (took 0s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.19 KiB/s (took 1s)                                                                                                                        Finished in 1.11s
+(1/1) running `it_works`...
+all tests passed!
+```
+
+Note that to add a new test file to the `tests` directory you also need to add a new `[[test]]` section to `Cargo.toml`.
+
+To run all the tests via `cargo test` the tests need to be explicitly disabled for all the existing binary targets.
+See `Cargo.toml` for details on how to do this.
+
+## Support
+
+`app-template` is part of the [Knurling] project, [Ferrous Systems]' effort at
+improving tooling used to develop for embedded systems.
+
+If you think that our work is useful, consider sponsoring it via [GitHub
+Sponsors].
+
+## License
+
+Licensed under either of
+
+- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
+  http://www.apache.org/licenses/LICENSE-2.0)
+
+- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+licensed as above, without any additional terms or conditions.
+
+[Knurling]: https://knurling.ferrous-systems.com
+[Ferrous Systems]: https://ferrous-systems.com/
+[GitHub Sponsors]: https://github.com/sponsors/knurling-rs

2sem_sem2/src/bin/main.rs

@@ -0,0 +1,57 @@
+// src/bin/main.rs
+#![no_std]
+#![no_main]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_stm32::exti::ExtiInput;
+use embassy_stm32::gpio;
+use embassy_stm32::gpio::{Output, Pull};
+use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
+use embassy_sync::channel::Channel;
+use embassy_time::Duration;
+use semestralka2::level_for_bit;
+use semestralka2::receive::bit_receive_and_decode;
+use semestralka2::send::{bit_send, msg_encode};
+
+use {defmt_rtt as _, panic_probe as _};
+
+static PIPE_SEND: Channel<CriticalSectionRawMutex, u8, 128> = Channel::new();
+// static PIPE_REC: Channel<CriticalSectionRawMutex, u8, 128> = Channel::new();
+// static REC_ALLOWED: AtomicBool = AtomicBool::new(true);
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    info!("tititititi");
+
+    let p = embassy_stm32::init(Default::default());
+    let tx = Output::new(
+        p.PF2,
+        if level_for_bit(1) {
+            gpio::Level::High
+        } else {
+            gpio::Level::Low
+        },
+        gpio::Speed::VeryHigh,
+    );
+    let rx = ExtiInput::new(p.PA3, p.EXTI3, Pull::Up);
+
+    let sender = PIPE_SEND.sender();
+    let receiver = PIPE_SEND.receiver();
+
+    let e_nrz = semestralka2::Encoding::Nrz;
+    spawner.spawn(bit_send(tx, receiver, e_nrz)).unwrap();
+    spawner.spawn(bit_receive_and_decode(rx, e_nrz)).unwrap();
+
+    info!("starting loop");
+    loop {
+        let _ = msg_encode(b"ahoj", &sender).await;
+        let _ = msg_encode(b"hello", &sender).await;
+
+        let data = [0x01, 0x02, 0x03, 0x04];
+        let _ = msg_encode(&data, &sender).await;
+
+        info!("frame sent");
+        embassy_time::Timer::after(Duration::from_secs(1)).await;
+    }
+}

2sem_sem2/src/lib.rs

@@ -0,0 +1,29 @@
+#![no_std]
+
+pub mod receive;
+pub mod send;
+
+#[derive(Copy, Clone, PartialEq)]
+pub enum Encoding {
+    Nrz,
+    Nrzi,
+    Manchester,
+}
+
+#[derive(Copy, Clone, PartialEq)]
+pub enum LogicLevel {
+    Low,
+    High,
+}
+
+pub const LOGIC_ZERO: LogicLevel = LogicLevel::Low;
+pub const LOGIC_ONE: LogicLevel = LogicLevel::High;
+
+pub fn level_for_bit(bit: u8) -> bool {
+    let level = if bit == 0 { LOGIC_ZERO } else { LOGIC_ONE };
+    level == LogicLevel::High
+}
+
+pub fn bit_for_level(level: bool) -> u8 {
+    if level_for_bit(1) == level { 1 } else { 0 }
+}

2sem_sem2/src/receive.rs

@@ -0,0 +1,211 @@
+use defmt::info;
+use embassy_stm32::exti::ExtiInput;
+use embassy_time::{Ticker, Timer};
+
+use crate::{Encoding, bit_for_level, level_for_bit};
+
+const START: u8 = 0x7E;
+const STOP: u8 = 0x81;
+const MAX_PAYLOAD: usize = 64;
+
+fn crc8(crc: u8, byte: u8) -> u8 {
+    let mut c = crc ^ byte;
+    for _ in 0..8 {
+        c = if c & 0x80 != 0 {
+            (c << 1) ^ 0x07
+        } else {
+            c << 1
+        };
+    }
+    c
+}
+
+async fn sample_byte(
+    pin: &mut ExtiInput<'static>,
+    encoding: Encoding,
+    ticker: &mut Ticker,
+    last_physical_level: &mut bool,
+    bit_time: embassy_time::Duration,
+) -> u8 {
+    let mut byte = 0u8;
+    for _ in 0..8 {
+        let current_level = pin.is_high();
+        let bit = match encoding {
+            Encoding::Nrz => {
+                let bit = bit_for_level(pin.is_high());
+                ticker.next().await;
+                bit
+            }
+            Encoding::Nrzi => {
+                let bit = if current_level != *last_physical_level {
+                    1
+                } else {
+                    0
+                };
+                *last_physical_level = current_level;
+                ticker.next().await;
+                bit
+            }
+            Encoding::Manchester => {
+                Timer::after(bit_time / 4).await;
+                let first_half = pin.is_high();
+
+                Timer::after(bit_time / 2).await;
+                let second_half = pin.is_high();
+
+                Timer::after(bit_time / 4).await;
+
+                if first_half == level_for_bit(1) && second_half == level_for_bit(0) {
+                    1
+                } else {
+                    0
+                }
+            }
+        };
+        byte = (byte << 1) | bit;
+    }
+    byte
+}
+
+#[embassy_executor::task]
+pub async fn bit_receive_and_decode(mut pin: ExtiInput<'static>, encoding: Encoding) {
+    loop {
+        if level_for_bit(1) {
+            pin.wait_for_falling_edge().await;
+        } else {
+            pin.wait_for_rising_edge().await;
+        }
+        let t1 = embassy_time::Instant::now();
+
+        if level_for_bit(1) {
+            pin.wait_for_rising_edge().await;
+        } else {
+            pin.wait_for_falling_edge().await;
+        }
+        let bit_time = embassy_time::Instant::now().duration_since(t1);
+
+        // stred data bitu
+        if encoding != Encoding::Manchester {
+            Timer::after(bit_time / 2).await;
+        }
+
+        let mut ticker = Ticker::every(bit_time);
+        let mut last_level = level_for_bit(1);
+
+        // First START bit is the already detected logical 0, sample the remaining 7 bits.
+        let mut start_byte = 0u8;
+        for _ in 0..7 {
+            let bit = match encoding {
+                Encoding::Nrz => {
+                    let bit = bit_for_level(pin.is_high());
+                    ticker.next().await;
+                    bit
+                }
+                Encoding::Nrzi => {
+                    let current_level = pin.is_high();
+                    let b = if current_level != last_level { 1 } else { 0 };
+                    last_level = current_level;
+                    ticker.next().await;
+                    b
+                }
+                Encoding::Manchester => {
+                    Timer::after(bit_time / 4).await;
+                    let first_pol = pin.is_high();
+                    Timer::after(bit_time / 2).await;
+                    let second_pol = pin.is_high();
+                    Timer::after(bit_time / 4).await;
+                    if first_pol == level_for_bit(1) && second_pol == level_for_bit(0) {
+                        1
+                    } else {
+                        0
+                    }
+                }
+            };
+            start_byte = (start_byte << 1) | bit;
+        }
+
+        if start_byte != START {
+            info!("start fail: 0x{:02X}", start_byte);
+            continue;
+        }
+
+        // len
+        let len = sample_byte(&mut pin, encoding, &mut ticker, &mut last_level, bit_time).await;
+        if len as usize > MAX_PAYLOAD {
+            info!("bad len {}", len);
+            continue;
+        }
+
+        // payload
+        let mut payload = [0u8; MAX_PAYLOAD];
+        for i in 0..(len as usize) {
+            payload[i] =
+                sample_byte(&mut pin, encoding, &mut ticker, &mut last_level, bit_time).await;
+        }
+
+        // crc
+        let crc_recv =
+            sample_byte(&mut pin, encoding, &mut ticker, &mut last_level, bit_time).await;
+
+        // parita
+        let parity_recv = match encoding {
+            Encoding::Nrz => {
+                let bit = bit_for_level(pin.is_high());
+                ticker.next().await;
+                bit
+            }
+            Encoding::Nrzi => {
+                let current_p = pin.is_high();
+                let b = if current_p != last_level { 1 } else { 0 };
+                last_level = current_p;
+                ticker.next().await;
+                b
+            }
+            Encoding::Manchester => {
+                Timer::after(bit_time / 4).await;
+                let f = pin.is_high();
+                Timer::after(bit_time / 2).await;
+                let s = pin.is_high();
+                Timer::after(bit_time / 4).await;
+                if f == level_for_bit(1) && s == level_for_bit(0) {
+                    1
+                } else {
+                    0
+                }
+            }
+        };
+
+        // stop
+        let stop = sample_byte(&mut pin, encoding, &mut ticker, &mut last_level, bit_time).await;
+        if stop != STOP {
+            info!("bad stop 0x{:02X}", stop);
+            continue;
+        }
+
+        // verify CRC
+        let mut crc_calc = crc8(0, len);
+        for i in 0..(len as usize) {
+            crc_calc = crc8(crc_calc, payload[i]);
+        }
+        if crc_calc != crc_recv {
+            info!("crc nesedi 0x{:02X} ma byt 0x{:02X}", crc_recv, crc_calc);
+            continue;
+        }
+
+        // verify parity
+        let mut ones = len.count_ones() + crc_recv.count_ones();
+        for i in 0..(len as usize) {
+            ones += payload[i].count_ones();
+        }
+        if (ones as u8 & 1) != parity_recv {
+            info!("nesedi parita");
+            continue;
+        }
+
+        if let Ok(s) = core::str::from_utf8(&payload[..len as usize]) {
+            info!("RX OK: \"{}\"", s);
+        } else {
+            info!("RX OK: {} bytes", len);
+        }
+    }
+}

2sem_sem2/src/send.rs

@@ -0,0 +1,126 @@
+// src/send.rs
+
+use embassy_stm32::gpio::{Level, Output};
+use embassy_sync::{
+    blocking_mutex::raw::CriticalSectionRawMutex,
+    channel::{Receiver, Sender},
+};
+use embassy_time::{Duration, Ticker};
+
+use crate::{Encoding, level_for_bit};
+
+const START: u8 = 0x7E;
+const STOP: u8 = 0x81;
+const MAX_PAYLOAD: usize = 64;
+const BIT_PERIOD: Duration = Duration::from_millis(10);
+
+pub type Tx = Sender<'static, CriticalSectionRawMutex, u8, 128>;
+
+fn set_level(pin: &mut Output<'static>, is_high: bool) {
+    pin.set_level(if is_high { Level::High } else { Level::Low });
+}
+
+async fn send_byte(byte: u8, tx: &Tx) {
+    for i in (0..8).rev() {
+        tx.send((byte >> i) & 1).await;
+    }
+}
+
+/// [START] [LEN] [PAYLOAD ...] [CRC] [P] [STOP]
+pub async fn msg_encode(payload: &[u8], tx: &Tx) -> Result<(), ()> {
+    if payload.len() > MAX_PAYLOAD {
+        return Err(());
+    }
+
+    // start
+    send_byte(START, tx).await;
+
+    // len
+    let len = payload.len() as u8;
+    send_byte(len, tx).await;
+    for &b in payload {
+        send_byte(b, tx).await;
+    }
+
+    // crc
+    let mut crc = crc8(0, len);
+    for &b in payload {
+        crc = crc8(crc, b);
+    }
+    send_byte(crc, tx).await;
+
+    let mut ones = len.count_ones() + crc.count_ones();
+    for &b in payload {
+        ones += b.count_ones();
+    }
+    tx.send((ones as u8) & 1).await;
+
+    send_byte(STOP, tx).await;
+
+    // idle
+    tx.send(1).await;
+
+    Ok(())
+}
+
+fn crc8(crc: u8, byte: u8) -> u8 {
+    let mut c = crc ^ byte;
+    for _ in 0..8 {
+        c = if c & 0x80 != 0 {
+            (c << 1) ^ 0x07
+        } else {
+            c << 1
+        };
+    }
+    c
+}
+
+#[embassy_executor::task]
+pub async fn bit_send(
+    mut pin: Output<'static>,
+    rx: Receiver<'static, CriticalSectionRawMutex, u8, 128>,
+    encoding: Encoding,
+) {
+    let mut ticker = Ticker::every(BIT_PERIOD / 2);
+    let mut is_high = level_for_bit(1);
+    set_level(&mut pin, is_high);
+
+    loop {
+        let bit = rx.receive().await;
+        match encoding {
+            Encoding::Nrz => {
+                is_high = level_for_bit(bit);
+                set_level(&mut pin, is_high);
+                ticker.next().await;
+            }
+            // toggle, ak sme v 1, inac sa nedeje nic
+            Encoding::Nrzi => {
+                if bit == 1 {
+                    is_high = !is_high;
+                    if is_high {
+                        pin.set_high();
+                    } else {
+                        pin.set_low();
+                    }
+                }
+                ticker.next().await;
+            }
+            // manchester xor tabulka
+            Encoding::Manchester => {
+                if bit == 1 {
+                    // high -> low
+                    set_level(&mut pin, level_for_bit(1));
+                    ticker.next().await;
+                    set_level(&mut pin, level_for_bit(0));
+                    ticker.next().await;
+                } else {
+                    // low -> high
+                    set_level(&mut pin, level_for_bit(0));
+                    ticker.next().await;
+                    set_level(&mut pin, level_for_bit(1));
+                    ticker.next().await;
+                }
+            }
+        };
+    }
+}

2sem_sem2/tests/integration.rs

@@ -0,0 +1,16 @@
+#![no_std]
+#![no_main]
+
+use stm32u5_blinky as _; // memory layout + panic handler
+
+// See https://crates.io/crates/defmt-test/0.3.0 for more documentation (e.g. about the 'state'
+// feature)
+#[defmt_test::tests]
+mod tests {
+    use defmt::assert;
+
+    #[test]
+    fn it_works() {
+        assert!(true)
+    }
+}

2sem_spi/.cargo/config.toml

@@ -0,0 +1,15 @@
+[build]
+target = "thumbv8m.main-none-eabihf"
+
+[target.thumbv8m.main-none-eabihf]
+runner = "probe-rs run --chip STM32U575ZITxQ"
+
+rustflags = [
+  "-C", "linker=rust-lld",
+  "-C", "link-arg=-Tlink.x",
+  "-C", "link-arg=-Tdefmt.x",
+  "-C", "link-arg=--nmagic",
+]
+
+[package.metadata.cargo-flash]
+chip = "STM32U575ZIT"

2sem_spi/.gitignore

@@ -0,0 +1 @@
+/target

2sem_spi/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+authors = ["Priec <filippriec@gmail.com>"]
+name = "hal_rng"
+edition = "2024"
+version = "0.1.0"
+
+
+[dependencies]
+cortex-m = { version = "0.7.7", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = "0.7.5"
+panic-halt = "1.0.0"
+
+embassy-executor = { version = "0.9.1", features = ["arch-cortex-m", "executor-thread"] }
+embassy-futures = "0.1.2"
+embassy-stm32 = { version = "0.4.0", features = ["unstable-pac", "stm32u575zi", "time-driver-any", "memory-x", "defmt"] }
+embassy-sync = "0.7.2"
+embassy-time = { version = "0.5.0", features = ["tick-hz-32_768"] }
+embassy-usb = "0.5.1"
+
+embedded-hal = "1.0.0"
+embedded-graphics = "0.8.1"
+heapless = { version = "0.9.1", default-features = false }
+micromath = "2.1.0"
+tinybmp = "0.6.0"
+panic-probe = { version = "1.0.0", features = ["defmt"] }
+defmt-rtt = "1.1.0"
+defmt = "1.0.1"
+static_cell = "2.1.1"
+embedded-io-async = "0.6.0"
+embedded-io = "0.6.1"

2sem_spi/LICENSE-APACHE

@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
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+
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+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

2sem_spi/LICENSE-MIT

@@ -0,0 +1,23 @@
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

2sem_spi/Makefile

@@ -0,0 +1,23 @@
+TARGET = thumbv8m.main-none-eabihf
+CHIP = STM32U575ZI
+BIN = stm32u5-blinky
+MODE ?= release
+TARGET_DIR = target/$(TARGET)/$(MODE)
+ELF = $(TARGET_DIR)/$(BIN)
+PROBE = probe-rs
+
+.PHONY: all build flash clean empty
+
+all: build
+
+build:
+	cargo build --$(MODE)
+
+flash: build
+	$(PROBE) run --chip $(CHIP) $(ELF)
+
+empty:
+	$(PROBE) erase --chip $(CHIP)
+
+clean:
+	cargo clean

2sem_spi/README.md

@@ -0,0 +1,232 @@
+# `app-template`
+
+> Quickly set up a [`probe-rs`] + [`defmt`] + [`flip-link`] embedded project
+
+[`probe-rs`]: https://crates.io/crates/probe-rs
+[`defmt`]: https://github.com/knurling-rs/defmt
+[`flip-link`]: https://github.com/knurling-rs/flip-link
+
+## Dependencies
+
+### 1. `flip-link`:
+
+```bash
+cargo install flip-link
+```
+
+### 2. `probe-rs`:
+
+Install probe-rs by following the instructions at <https://probe.rs/docs/getting-started/installation/>.
+
+### 3. [`cargo-generate`]:
+
+```bash
+cargo install cargo-generate
+```
+
+[`cargo-generate`]: https://crates.io/crates/cargo-generate
+
+> *Note:* You can also just clone this repository instead of using `cargo-generate`, but this involves additional manual adjustments.
+
+## Setup
+
+### 1. Initialize the project template
+
+```bash
+cargo generate \
+    --git https://github.com/knurling-rs/app-template \
+    --branch main \
+    --name my-app
+```
+
+If you look into your new `my-app` folder, you'll find that there are a few `TODO`s in the files marking the properties you need to set.
+
+Let's walk through them together now.
+
+### 2. Set `probe-rs` chip
+
+Pick a chip from ` probe-rs chip list` and enter it into `.cargo/config.toml`.
+
+If, for example, you have a nRF52840 Development Kit as used in one of [our exercises], replace `{{chip}}` with `nRF52840_xxAA`.
+
+[our workshops]: https://rust-exercises.ferrous-systems.com
+
+```diff
+ # .cargo/config.toml
+-runner = ["probe-rs", "run", "--chip", "$CHIP", "--log-format=oneline"]
++runner = ["probe-rs", "run", "--chip", "nRF52840_xxAA", "--log-format=oneline"]
+```
+
+### 3. Adjust the compilation target
+
+In `.cargo/config.toml`, pick the right compilation target for your board.
+
+```diff
+ # .cargo/config.toml
+ [build]
+-target = "thumbv6m-none-eabi"    # Cortex-M0 and Cortex-M0+
+-# target = "thumbv7m-none-eabi"    # Cortex-M3
+-# target = "thumbv7em-none-eabi"   # Cortex-M4 and Cortex-M7 (no FPU)
+-# target = "thumbv7em-none-eabihf" # Cortex-M4F and Cortex-M7F (with FPU)
++target = "thumbv7em-none-eabihf" # Cortex-M4F (with FPU)
+```
+
+Add the target with `rustup`.
+
+```bash
+rustup target add thumbv7em-none-eabihf
+```
+
+### 4. Add a HAL as a dependency
+
+In `Cargo.toml`, list the Hardware Abstraction Layer (HAL) for your board as a dependency.
+
+For the nRF52840 you'll want to use the [`nrf52840-hal`].
+
+[`nrf52840-hal`]: https://crates.io/crates/nrf52840-hal
+
+```diff
+ # Cargo.toml
+ [dependencies]
+-# some-hal = "1.2.3"
++nrf52840-hal = "0.14.0"
+```
+
+⚠️ Note for RP2040 users ⚠️
+
+You will need to not just specify the `rp-hal` HAL, but a BSP (board support crate) which includes a second stage bootloader. Please find a list of available BSPs [here](https://github.com/rp-rs/rp-hal-boards#packages).
+
+### 5. Import your HAL
+
+Now that you have selected a HAL, fix the HAL import in `src/lib.rs`
+
+```diff
+ // my-app/src/lib.rs
+-// use some_hal as _; // memory layout
++use nrf52840_hal as _; // memory layout
+```
+
+### (6. Get a linker script)
+
+Some HAL crates require that you manually copy over a file called `memory.x` from the HAL to the root of your project. For nrf52840-hal, this is done automatically so no action is needed. For other HAL crates, see their documentation on where to find an example file.
+
+The `memory.x` file should look something like:
+
+```text
+MEMORY
+{
+  FLASH : ORIGIN = 0x00000000, LENGTH = 1024K
+  RAM   : ORIGIN = 0x20000000, LENGTH = 256K
+}
+```
+
+The `memory.x` file is included in the `cortex-m-rt` linker script `link.x`, and so `link.x` is the one you should tell `rustc` to use (see the `.cargo/config.toml` file where we do that).
+
+### 7. Run!
+
+You are now all set to `cargo-run` your first `defmt`-powered application!
+There are some examples in the `src/bin` directory.
+
+Start by `cargo run`-ning `my-app/src/bin/hello.rs`:
+
+```console
+$ # `rb` is an alias for `run --bin`
+$ cargo rb hello
+    Finished `dev` profile [optimized + debuginfo] target(s) in 0.01s
+     Running `probe-rs run --chip nrf52840_xxaa --log-format=oneline target/thumbv6m-none-eabi/debug/hello`
+      Erasing ✔ 100% [####################]   8.00 KiB @  15.79 KiB/s (took 1s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.19 KiB/s (took 1s)                                                                                                                        Finished in 1.11s
+Hello, world!
+
+$ echo $?
+0
+```
+
+If you're running out of memory (`flip-link` bails with an overflow error), you can decrease the size of the device memory buffer by setting the `DEFMT_RTT_BUFFER_SIZE` environment variable. The default value is 1024 bytes, and powers of two should be used for optimal performance:
+
+```console
+$ DEFMT_RTT_BUFFER_SIZE=64 cargo rb hello
+```
+
+### (8. Set `rust-analyzer.linkedProjects`)
+
+If you are using [rust-analyzer] with VS Code for IDE-like features you can add following configuration to your `.vscode/settings.json` to make it work transparently across workspaces. Find the details of this option in the [RA docs].
+
+```json
+{
+    "rust-analyzer.linkedProjects": [
+        "Cargo.toml",
+        "firmware/Cargo.toml",
+    ]
+}
+```
+
+[RA docs]: https://rust-analyzer.github.io/manual.html#configuration
+[rust-analyzer]: https://rust-analyzer.github.io/
+
+## Running tests
+
+The template comes configured for running unit tests and integration tests on the target.
+
+Unit tests reside in the library crate and can test private API; the initial set of unit tests are in `src/lib.rs`.
+`cargo test --lib` will run those unit tests.
+
+```console
+$ cargo test --lib
+   Compiling example v0.1.0 (./knurling-rs/example)
+    Finished `test` profile [optimized + debuginfo] target(s) in 0.15s
+     Running unittests src/lib.rs (target/thumbv6m-none-eabi/debug/deps/example-2b0d0e25d141bf57)
+      Erasing ✔ 100% [####################]   8.00 KiB @  15.99 KiB/s (took 1s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.33 KiB/s (took 1s)                                                                                                                        Finished in 1.10s
+(1/1) running `it_works`...
+all tests passed!
+```
+
+Integration tests reside in the `tests` directory; the initial set of integration tests are in `tests/integration.rs`.
+`cargo test --test integration` will run those integration tests.
+Note that the argument of the `--test` flag must match the name of the test file in the `tests` directory.
+
+```console
+$ cargo test --test integration
+   Compiling example v0.1.0 (./knurling-rs/example)
+    Finished `test` profile [optimized + debuginfo] target(s) in 0.10s
+     Running tests/integration.rs (target/thumbv6m-none-eabi/debug/deps/integration-aaaff41151f6a722)
+      Erasing ✔ 100% [####################]   8.00 KiB @  16.03 KiB/s (took 0s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.19 KiB/s (took 1s)                                                                                                                        Finished in 1.11s
+(1/1) running `it_works`...
+all tests passed!
+```
+
+Note that to add a new test file to the `tests` directory you also need to add a new `[[test]]` section to `Cargo.toml`.
+
+To run all the tests via `cargo test` the tests need to be explicitly disabled for all the existing binary targets.
+See `Cargo.toml` for details on how to do this.
+
+## Support
+
+`app-template` is part of the [Knurling] project, [Ferrous Systems]' effort at
+improving tooling used to develop for embedded systems.
+
+If you think that our work is useful, consider sponsoring it via [GitHub
+Sponsors].
+
+## License
+
+Licensed under either of
+
+- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
+  http://www.apache.org/licenses/LICENSE-2.0)
+
+- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+licensed as above, without any additional terms or conditions.
+
+[Knurling]: https://knurling.ferrous-systems.com
+[Ferrous Systems]: https://ferrous-systems.com/
+[GitHub Sponsors]: https://github.com/sponsors/knurling-rs

2sem_spi/src/bin/main.rs

@@ -0,0 +1,50 @@
+// src/bin/main.rs
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::spi::{Config, Spi};
+use embassy_stm32::gpio::{Level, Speed, Output};
+use embassy_time::{Duration, Timer};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    info!("tititi");
+
+    let p = embassy_stm32::init(Default::default());
+
+    let mut spi = Spi::new_blocking(p.SPI1, p.PB3, p.PB5, p.PB4, Config::default());
+    let mut cs = Output::new(p.PA4, Level::High, Speed::VeryHigh);
+
+    cs.set_low();
+    let _ = spi.blocking_write(&[0x01u8, 0x79u8]);
+    cs.set_high();
+
+    loop {
+        let mut data = [0u8; 10];
+
+        data[0] = 0xA4;
+        cs.set_low();
+        let result = spi.blocking_transfer_in_place(&mut data);
+        cs.set_high();
+
+        match result {
+            Ok(_) => {
+                let raw = &data[1..];
+
+                // 1. Correct 24-bit Signed Conversion (Minimal change)
+                let x = (((raw[0] as i32) << 24) | ((raw[1] as i32) << 16) | ((raw[2] as i32) << 8)) >> 8;
+                let y = (((raw[3] as i32) << 24) | ((raw[4] as i32) << 16) | ((raw[5] as i32) << 8)) >> 8;
+                let z = (((raw[6] as i32) << 24) | ((raw[7] as i32) << 16) | ((raw[8] as i32) << 8)) >> 8;
+
+                // 2. Display in Relevant Decimal Format
+                info!("X: {} Y: {} Z: {}", x, y, z);
+            }
+            Err(e) => error!("SPI error: {:?}", e),
+        }
+
+        Timer::after(Duration::from_millis(10)).await;
+    }
+}

2sem_spi/src/lib.rs

@@ -0,0 +1 @@
+#![no_std]

2sem_spi/tests/integration.rs

@@ -0,0 +1,16 @@
+#![no_std]
+#![no_main]
+
+use stm32u5_blinky as _; // memory layout + panic handler
+
+// See https://crates.io/crates/defmt-test/0.3.0 for more documentation (e.g. about the 'state'
+// feature)
+#[defmt_test::tests]
+mod tests {
+    use defmt::assert;
+
+    #[test]
+    fn it_works() {
+        assert!(true)
+    }
+}

2sem_uart_flow_ctrl/.cargo/config.toml

@@ -0,0 +1,15 @@
+[build]
+target = "thumbv8m.main-none-eabihf"
+
+[target.thumbv8m.main-none-eabihf]
+runner = "probe-rs run --chip STM32U575ZITxQ"
+
+rustflags = [
+  "-C", "linker=rust-lld",
+  "-C", "link-arg=-Tlink.x",
+  "-C", "link-arg=-Tdefmt.x",
+  "-C", "link-arg=--nmagic",
+]
+
+[package.metadata.cargo-flash]
+chip = "STM32U575ZIT"

2sem_uart_flow_ctrl/.gitignore

@@ -0,0 +1 @@
+/target

2sem_uart_flow_ctrl/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+authors = ["Priec <filippriec@gmail.com>"]
+name = "hal_rng"
+edition = "2024"
+version = "0.1.0"
+
+
+[dependencies]
+cortex-m = { version = "0.7.7", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = "0.7.5"
+panic-halt = "1.0.0"
+
+embassy-executor = { version = "0.9.1", features = ["arch-cortex-m", "executor-thread"] }
+embassy-futures = "0.1.2"
+embassy-stm32 = { version = "0.4.0", features = ["unstable-pac", "stm32u575zi", "time-driver-any", "memory-x", "defmt"] }
+embassy-sync = "0.7.2"
+embassy-time = { version = "0.5.0", features = ["tick-hz-32_768"] }
+embassy-usb = "0.5.1"
+
+embedded-hal = "1.0.0"
+embedded-graphics = "0.8.1"
+heapless = { version = "0.9.1", default-features = false }
+micromath = "2.1.0"
+tinybmp = "0.6.0"
+panic-probe = { version = "1.0.0", features = ["defmt"] }
+defmt-rtt = "1.1.0"
+defmt = "1.0.1"
+static_cell = "2.1.1"
+embedded-io-async = "0.6.0"
+embedded-io = "0.6.1"

2sem_uart_flow_ctrl/LICENSE-APACHE

@@ -0,0 +1,201 @@
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2sem_uart_flow_ctrl/LICENSE-MIT

@@ -0,0 +1,23 @@
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

2sem_uart_flow_ctrl/Makefile

@@ -0,0 +1,23 @@
+TARGET = thumbv8m.main-none-eabihf
+CHIP = STM32U575ZI
+BIN = stm32u5-blinky
+MODE ?= release
+TARGET_DIR = target/$(TARGET)/$(MODE)
+ELF = $(TARGET_DIR)/$(BIN)
+PROBE = probe-rs
+
+.PHONY: all build flash clean empty
+
+all: build
+
+build:
+	cargo build --$(MODE)
+
+flash: build
+	$(PROBE) run --chip $(CHIP) $(ELF)
+
+empty:
+	$(PROBE) erase --chip $(CHIP)
+
+clean:
+	cargo clean

2sem_uart_flow_ctrl/README.md

@@ -0,0 +1,232 @@
+# `app-template`
+
+> Quickly set up a [`probe-rs`] + [`defmt`] + [`flip-link`] embedded project
+
+[`probe-rs`]: https://crates.io/crates/probe-rs
+[`defmt`]: https://github.com/knurling-rs/defmt
+[`flip-link`]: https://github.com/knurling-rs/flip-link
+
+## Dependencies
+
+### 1. `flip-link`:
+
+```bash
+cargo install flip-link
+```
+
+### 2. `probe-rs`:
+
+Install probe-rs by following the instructions at <https://probe.rs/docs/getting-started/installation/>.
+
+### 3. [`cargo-generate`]:
+
+```bash
+cargo install cargo-generate
+```
+
+[`cargo-generate`]: https://crates.io/crates/cargo-generate
+
+> *Note:* You can also just clone this repository instead of using `cargo-generate`, but this involves additional manual adjustments.
+
+## Setup
+
+### 1. Initialize the project template
+
+```bash
+cargo generate \
+    --git https://github.com/knurling-rs/app-template \
+    --branch main \
+    --name my-app
+```
+
+If you look into your new `my-app` folder, you'll find that there are a few `TODO`s in the files marking the properties you need to set.
+
+Let's walk through them together now.
+
+### 2. Set `probe-rs` chip
+
+Pick a chip from ` probe-rs chip list` and enter it into `.cargo/config.toml`.
+
+If, for example, you have a nRF52840 Development Kit as used in one of [our exercises], replace `{{chip}}` with `nRF52840_xxAA`.
+
+[our workshops]: https://rust-exercises.ferrous-systems.com
+
+```diff
+ # .cargo/config.toml
+-runner = ["probe-rs", "run", "--chip", "$CHIP", "--log-format=oneline"]
++runner = ["probe-rs", "run", "--chip", "nRF52840_xxAA", "--log-format=oneline"]
+```
+
+### 3. Adjust the compilation target
+
+In `.cargo/config.toml`, pick the right compilation target for your board.
+
+```diff
+ # .cargo/config.toml
+ [build]
+-target = "thumbv6m-none-eabi"    # Cortex-M0 and Cortex-M0+
+-# target = "thumbv7m-none-eabi"    # Cortex-M3
+-# target = "thumbv7em-none-eabi"   # Cortex-M4 and Cortex-M7 (no FPU)
+-# target = "thumbv7em-none-eabihf" # Cortex-M4F and Cortex-M7F (with FPU)
++target = "thumbv7em-none-eabihf" # Cortex-M4F (with FPU)
+```
+
+Add the target with `rustup`.
+
+```bash
+rustup target add thumbv7em-none-eabihf
+```
+
+### 4. Add a HAL as a dependency
+
+In `Cargo.toml`, list the Hardware Abstraction Layer (HAL) for your board as a dependency.
+
+For the nRF52840 you'll want to use the [`nrf52840-hal`].
+
+[`nrf52840-hal`]: https://crates.io/crates/nrf52840-hal
+
+```diff
+ # Cargo.toml
+ [dependencies]
+-# some-hal = "1.2.3"
++nrf52840-hal = "0.14.0"
+```
+
+⚠️ Note for RP2040 users ⚠️
+
+You will need to not just specify the `rp-hal` HAL, but a BSP (board support crate) which includes a second stage bootloader. Please find a list of available BSPs [here](https://github.com/rp-rs/rp-hal-boards#packages).
+
+### 5. Import your HAL
+
+Now that you have selected a HAL, fix the HAL import in `src/lib.rs`
+
+```diff
+ // my-app/src/lib.rs
+-// use some_hal as _; // memory layout
++use nrf52840_hal as _; // memory layout
+```
+
+### (6. Get a linker script)
+
+Some HAL crates require that you manually copy over a file called `memory.x` from the HAL to the root of your project. For nrf52840-hal, this is done automatically so no action is needed. For other HAL crates, see their documentation on where to find an example file.
+
+The `memory.x` file should look something like:
+
+```text
+MEMORY
+{
+  FLASH : ORIGIN = 0x00000000, LENGTH = 1024K
+  RAM   : ORIGIN = 0x20000000, LENGTH = 256K
+}
+```
+
+The `memory.x` file is included in the `cortex-m-rt` linker script `link.x`, and so `link.x` is the one you should tell `rustc` to use (see the `.cargo/config.toml` file where we do that).
+
+### 7. Run!
+
+You are now all set to `cargo-run` your first `defmt`-powered application!
+There are some examples in the `src/bin` directory.
+
+Start by `cargo run`-ning `my-app/src/bin/hello.rs`:
+
+```console
+$ # `rb` is an alias for `run --bin`
+$ cargo rb hello
+    Finished `dev` profile [optimized + debuginfo] target(s) in 0.01s
+     Running `probe-rs run --chip nrf52840_xxaa --log-format=oneline target/thumbv6m-none-eabi/debug/hello`
+      Erasing ✔ 100% [####################]   8.00 KiB @  15.79 KiB/s (took 1s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.19 KiB/s (took 1s)                                                                                                                        Finished in 1.11s
+Hello, world!
+
+$ echo $?
+0
+```
+
+If you're running out of memory (`flip-link` bails with an overflow error), you can decrease the size of the device memory buffer by setting the `DEFMT_RTT_BUFFER_SIZE` environment variable. The default value is 1024 bytes, and powers of two should be used for optimal performance:
+
+```console
+$ DEFMT_RTT_BUFFER_SIZE=64 cargo rb hello
+```
+
+### (8. Set `rust-analyzer.linkedProjects`)
+
+If you are using [rust-analyzer] with VS Code for IDE-like features you can add following configuration to your `.vscode/settings.json` to make it work transparently across workspaces. Find the details of this option in the [RA docs].
+
+```json
+{
+    "rust-analyzer.linkedProjects": [
+        "Cargo.toml",
+        "firmware/Cargo.toml",
+    ]
+}
+```
+
+[RA docs]: https://rust-analyzer.github.io/manual.html#configuration
+[rust-analyzer]: https://rust-analyzer.github.io/
+
+## Running tests
+
+The template comes configured for running unit tests and integration tests on the target.
+
+Unit tests reside in the library crate and can test private API; the initial set of unit tests are in `src/lib.rs`.
+`cargo test --lib` will run those unit tests.
+
+```console
+$ cargo test --lib
+   Compiling example v0.1.0 (./knurling-rs/example)
+    Finished `test` profile [optimized + debuginfo] target(s) in 0.15s
+     Running unittests src/lib.rs (target/thumbv6m-none-eabi/debug/deps/example-2b0d0e25d141bf57)
+      Erasing ✔ 100% [####################]   8.00 KiB @  15.99 KiB/s (took 1s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.33 KiB/s (took 1s)                                                                                                                        Finished in 1.10s
+(1/1) running `it_works`...
+all tests passed!
+```
+
+Integration tests reside in the `tests` directory; the initial set of integration tests are in `tests/integration.rs`.
+`cargo test --test integration` will run those integration tests.
+Note that the argument of the `--test` flag must match the name of the test file in the `tests` directory.
+
+```console
+$ cargo test --test integration
+   Compiling example v0.1.0 (./knurling-rs/example)
+    Finished `test` profile [optimized + debuginfo] target(s) in 0.10s
+     Running tests/integration.rs (target/thumbv6m-none-eabi/debug/deps/integration-aaaff41151f6a722)
+      Erasing ✔ 100% [####################]   8.00 KiB @  16.03 KiB/s (took 0s)
+  Programming ✔ 100% [####################]   8.00 KiB @  13.19 KiB/s (took 1s)                                                                                                                        Finished in 1.11s
+(1/1) running `it_works`...
+all tests passed!
+```
+
+Note that to add a new test file to the `tests` directory you also need to add a new `[[test]]` section to `Cargo.toml`.
+
+To run all the tests via `cargo test` the tests need to be explicitly disabled for all the existing binary targets.
+See `Cargo.toml` for details on how to do this.
+
+## Support
+
+`app-template` is part of the [Knurling] project, [Ferrous Systems]' effort at
+improving tooling used to develop for embedded systems.
+
+If you think that our work is useful, consider sponsoring it via [GitHub
+Sponsors].
+
+## License
+
+Licensed under either of
+
+- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
+  http://www.apache.org/licenses/LICENSE-2.0)
+
+- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+licensed as above, without any additional terms or conditions.
+
+[Knurling]: https://knurling.ferrous-systems.com
+[Ferrous Systems]: https://ferrous-systems.com/
+[GitHub Sponsors]: https://github.com/sponsors/knurling-rs

2sem_uart_flow_ctrl/src/bin/main.rs

@@ -0,0 +1,126 @@
+// src/bin/main.rs
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use core::sync::atomic::{AtomicBool, Ordering};
+use embassy_executor::Spawner;
+use embassy_stm32::usart::{Config, Uart, UartRx, UartTx, InterruptHandler};
+use embassy_stm32::peripherals::{USART1, USART3};
+use embassy_stm32::bind_interrupts;
+use embassy_time::{Duration, Timer};
+use embassy_sync::channel::Channel;
+use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
+
+use {defmt_rtt as _, panic_probe as _};
+
+bind_interrupts!(struct Irqs {
+    USART1 => InterruptHandler<USART1>;
+    USART3 => InterruptHandler<USART3>;
+});
+
+static PIPE: Channel<CriticalSectionRawMutex, u8, 64> = Channel::new();
+static SEND_ALLOWED: AtomicBool = AtomicBool::new(true);
+static REC_ALLOWED: AtomicBool = AtomicBool::new(true);
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    info!("tititititi");
+
+    let p = embassy_stm32::init(Default::default());
+
+    let config = Config::default();
+    let dev_usart = Uart::new(
+        p.USART1,
+        p.PA10,
+        p.PA9,
+        Irqs,
+        p.GPDMA1_CH0, // TX DMA
+        p.GPDMA1_CH1, // RX DMA
+        config,
+    ).unwrap();
+
+    let uart = Uart::new(
+        p.USART3,
+        p.PD9, // RX zo zariadenia
+        p.PD8, // TX do zariadenia
+        Irqs,
+        p.GPDMA1_CH2,
+        p.GPDMA1_CH3,
+        config,
+    ).unwrap();
+    let (mut tx, rx) = uart.split();
+    let (dev_tx, dev_rx) = dev_usart.split();
+    spawner.spawn(rx_task(rx, dev_tx)).unwrap();
+    spawner.spawn(toggle_rec_task()).unwrap();
+
+    let sender = PIPE.sender();
+    let receiver = PIPE.receiver();
+
+    info!("starting echo");
+
+    let data = b"filip\r\n";
+    let idle = &[0x13u8];
+
+    loop {
+        // rec_allowed = (start_time.elapsed().as_secs() / 2) % 2 == 0;
+        let current_send_allowed = SEND_ALLOWED.load(Ordering::Relaxed);
+        let current_rec_allowed = REC_ALLOWED.load(Ordering::Relaxed);
+        if current_rec_allowed == true {
+            if current_send_allowed {
+                if let Ok(stored_byte) = receiver.try_receive() {
+                    let _ = tx.write(&[stored_byte]).await;
+                } else {
+                    let _ = tx.write(data).await;
+                }
+            } else {
+                for b in data {
+                    let _ = sender.try_send(*b);
+                }
+            }
+        } else {
+            let _ = tx.write(idle).await;
+        }
+        let _ = Timer::after(Duration::from_millis(100));
+    }
+}
+
+#[embassy_executor::task]
+async fn rx_task(
+    mut rx: UartRx<'static, embassy_stm32::mode::Async>,
+    mut pc_tx: UartTx<'static, embassy_stm32::mode::Async>
+) {
+    let mut buf = [0u8; 1];
+    loop {
+        if rx.read(&mut buf).await.is_ok() {
+            match buf[0] {
+                0x11 => {
+                    SEND_ALLOWED.store(true, Ordering::Relaxed);
+                    info!("Vysielanie povolené");
+                }
+                0x13 => {
+                    SEND_ALLOWED.store(false, Ordering::Relaxed);
+                    info!("Vysielanie zakázané");
+                }
+                _ => {}
+            }
+            let _ = pc_tx.write(&buf).await;
+        }
+    }
+}
+
+#[embassy_executor::task]
+async fn toggle_rec_task() {
+    loop {
+        Timer::after(Duration::from_secs(2)).await;
+        // Načítame aktuálnu hodnotu a uložíme jej opak
+        let current = REC_ALLOWED.load(Ordering::Relaxed);
+        REC_ALLOWED.store(!current, Ordering::Relaxed);
+
+        if !current {
+            info!("REC_ALLOWED: true");
+        } else {
+            info!("REC_ALLOWED: false");
+        }
+    }
+}

2sem_uart_flow_ctrl/src/lib.rs

@@ -0,0 +1 @@
+#![no_std]

2sem_uart_flow_ctrl/tests/integration.rs

@@ -0,0 +1,16 @@
+#![no_std]
+#![no_main]
+
+use stm32u5_blinky as _; // memory layout + panic handler
+
+// See https://crates.io/crates/defmt-test/0.3.0 for more documentation (e.g. about the 'state'
+// feature)
+#[defmt_test::tests]
+mod tests {
+    use defmt::assert;
+
+    #[test]
+    fn it_works() {
+        assert!(true)
+    }
+}

flake.lock

@@ -16,9 +16,44 @@
         "type": "github"
       }
     },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1744536153,
+        "narHash": "sha256-awS2zRgF4uTwrOKwwiJcByDzDOdo3Q1rPZbiHQg/N38=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "18dd725c29603f582cf1900e0d25f9f1063dbf11",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1777346187,
+        "narHash": "sha256-oVxyGjpiIsrXhWTJVUOs38fZQkLjd0nZGOY9K7Kfot8=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "146e7bf7569b8288f24d41d806b9f584f7cfd5b5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
       }
     }
   },

flake.nix

@@ -1,20 +1,26 @@
 {
   description = "STM32U575ZI-Q Rust Embedded Development Environment";
 
-  inputs = { nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable"; };
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+  };
 
-  outputs = { self, nixpkgs }: let
+  outputs = { self, nixpkgs, rust-overlay}: let
     system = "x86_64-linux";
-    pkgs = import nixpkgs { inherit system; };
+    pkgs = import nixpkgs {
+      inherit system;
+      overlays = [ (import rust-overlay) ];
+    };
     rust = pkgs.rust-bin.stable.latest.default.override {
       targets = [ "thumbv8m.main-none-eabihf" ];
-      extensions = [ "rust-src" "rustfmt" "clippy" ];
+      extensions = [ "rust-src" "rustfmt" "clippy" "rust-analyzer" ];
     };
   in {
     devShells.${system}.default = pkgs.mkShell {
       packages = with pkgs; [
         # Base toolchain
-        rustup
+        rust
         llvm
         gcc
         gnumake
@@ -40,13 +46,6 @@
       shellHook = ''
         echo ">>> STM32 DevShell"
 
-	export PATH=${pkgs.rust-analyzer}/bin:$PATH
-	export PATH=$HOME/.cargo/bin:$PATH
-
-        rustup default stable
-        rustup component add rust-src rustfmt clippy 2>/dev/null || true
-        rustup target add thumbv8m.main-none-eabihf 2>/dev/null || true
-
         export RUST_TARGET=thumbv8m.main-none-eabihf
         export CARGO_TARGET_DIR=target
       	export DEFMT_LOG=info

semestralka_2_uart/src/bin/main.rs

@@ -4,6 +4,13 @@
 
 use defmt::*;
 use embassy_stm32::pac;
+use embassy_stm32::Config as CPUConfig;
+use embassy_stm32::rcc::PllDiv;
+use embassy_stm32::rcc::PllMul;
+use embassy_stm32::rcc::PllPreDiv;
+use embassy_stm32::rcc::PllSource;
+use embassy_stm32::rcc::Pll;
+use embassy_stm32::rcc::Sysclk;
 use embassy_executor::{Spawner, task};
 use embassy_stm32::Config;
 use embassy_stm32::gpio::{Output, Level, Speed};
@@ -20,7 +27,24 @@ use {defmt_rtt as _, panic_probe as _};
 #[embassy_executor::main]
 async fn main(spawner: Spawner) {
     info!("boot");
-    let p = embassy_stm32::init(Config::default());
+    let mut config = CPUConfig::default();
+    config.rcc.hsi = true;
+    config.rcc.sys = Sysclk::PLL1_R;
+    config.rcc.pll1 = Some(Pll {
+        source: PllSource::HSI,
+        // 16 MHz / 1 × 20 / 2 = 160 MHz
+        prediv: PllPreDiv::DIV1,
+        mul:    PllMul::MUL20,
+        divp:   None,
+        divq:   None,
+        divr:   Some(PllDiv::DIV2),
+    });
+    config.enable_independent_io_supply = true;
+    config.enable_independent_analog_supply = true;
+
+    let p = embassy_stm32::init(config);
+    info!("boot");
+    // let p = embassy_stm32::init(Config::default());
     let mut led = Output::new(p.PA3, Level::Low, Speed::Low);
     let _led_ground = Output::new(p.PB0, Level::Low, Speed::Low);
     info!("init m8");

semestralka_2_uart/src/config.rs

@@ -6,7 +6,7 @@ pub const BAUD: u32 = 9_600;
 pub const PIPE_HW_TX_SIZE: usize = 1024;
 pub const PIPE_HW_RX_SIZE: usize = 1024;
 
-pub const WATCHDOG_TIMEOUT_US: u32 = 2_000_000;  // 2 seconds
+    pub const WATCHDOG_TIMEOUT_US: u32 = 9_000_000;  // 2 seconds
 
 pub static PIPE_HW_TX: Pipe<CriticalSectionRawMutex, PIPE_HW_TX_SIZE> = Pipe::new();
 pub static PIPE_HW_RX: Pipe<CriticalSectionRawMutex, PIPE_HW_RX_SIZE> = Pipe::new();