Lab fixes (#1361)

* lab fixes

* add the solutions

Author: alexandruradovici

website/lab/00.1.md

@@ -670,4 +670,4 @@ mod tests {
   - Define an enum called Expression with the appropriate variants(hint: use [`Box`](https://doc.rust-lang.org/alloc/boxed/struct.Box.html))
   - Create a function that returns an Expression based on a given string. Respect operator precedence rules
   - Creates a function that takes an Expression and evaluates it to an i32
-  - Read an expression from stdin and print out the result
+  - Read an expression from stdin and print out the result

website/lab/00.md

@@ -236,7 +236,7 @@ fn main() {
 
 :::warning 
 
-Note that the entire instance must be **editable**  ; Rust **doesn't allow us** to mark only certain fields as mutable!
+Note that the entire instance must be **mutable**  ; Rust **doesn't allow us** to mark only certain fields as mutable!
 
 :::
 
@@ -835,4 +835,4 @@ Before tackling the exercises, take a look and cover chapters [1](https://tourof
 
 [^c_equivalent]: The data types used here are considered for a 32 bit system, for other architectures the equivalent data types might differ (`short` is at least 2 bytes long).
 [^java_unsigned]: Starting with Java 8, the `Number` classes have some helper methods, like `compareUnsigned` and `toUnsigned...` that allow the usage and manipulation of unsigned numbers.
-[^move_might_be_optimized]: The compiler might optimize out the shallow copy. https://users.rust-lang.org/t/how-move-works-in-rust/116776/19
+[^move_might_be_optimized]: The compiler might optimize out the shallow copy. https://users.rust-lang.org/t/how-move-works-in-rust/116776/19

website/lab/01/index.mdx

@@ -1841,3 +1841,7 @@ Make sure you download the `.pacthed` versions of the files.
   to go step by step throughout the running firmware and look at the variables using the **Watches**.
 3. Define a few fuctions throughout the firmware and perform some math. Use the `probe-rs` VS Code extension
   to go step by step through the running firmware and look at the called functions using the **Call Stack**.
+
+## Solutions
+
+The lab's exercises solutions are available in the [lab-solutions](https://github.com/UPB-PMRust/lab-solutions/tree/main/lab01) repository.

website/lab/02/index.mdx

@@ -1006,3 +1006,7 @@ const CODES: [&str; 26] = [
 ];
 ```
 :::
+
+## Solutions
+
+The lab's exercises solutions are available in the [lab-solutions](https://github.com/UPB-PMRust/lab-solutions/tree/main/lab02) repository.

website/lab/03/index.mdx

@@ -838,4 +838,6 @@ Unlike the photoresistor, which requires an external resistor to form a voltage
 
 5. Write a program using Embassy that moves a servo motor smoothly between 0° and 180°, then back to 0°, in a continuous loop. (**2p**)
 
- 
+ ## Solutions
+
+The lab's exercises solutions are available in the [lab-solutions](https://github.com/UPB-PMRust/lab-solutions/tree/main/lab03) repository.

website/lab/04/index.md

@@ -507,3 +507,6 @@ However if the switch **S1** is pressed the state of traffic light changes immed
     Use a `PubSubChannel` to transmit the state of the traffic light from the LEDs task to both the buzzer and the servo motor tasks.
    :::
 
+## Solutions
+
+The lab's exercises solutions are available in the [lab-solutions](https://github.com/UPB-PMRust/lab-solutions/tree/main/lab04) repository.

website/lab/05/index.mdx

@@ -734,3 +734,7 @@ In order to increase the framerate, make sure to decrease the delay.
 
 Clearing the whole screen takes time. In order to optimize further, instead, draw a black circle over the old one before computing the new location.
 :::
+
+## Solutions
+
+The lab's exercises solutions are available in the [lab-solutions](https://github.com/UPB-PMRust/lab-solutions/tree/main/lab05) repository.

website/lab/06/index.mdx

@@ -712,3 +712,7 @@ let nvm_par_t1: u16 = ((data[1] as u16) << 8) | (data[0] as u16);
 :::tip `i32` to bytes and vice-versa
 To quickly convert an `i32` variable into an array of `u8`s, we can use either the `from_be_bytes()` and `to_be_bytes()` or the `from_le_bytes()` and `to_le_bytes()` methods. You can find more details about them in the [`i32` documentation](https://doc.rust-lang.org/core/primitive.i32.html) page.
 :::
+
+## Solutions
+
+The lab's exercises solutions are available in the [lab-solutions](https://github.com/UPB-PMRust/lab-solutions/tree/main/lab06) repository.

website/lab/07/index.mdx

@@ -639,3 +639,7 @@ Transform your board into a PC-controlled I/O expander.
       - If it receives `"P"`, read the pressure from the **BMP390** and send it back.
       - If it receives `"A"`, read the X, Y, Z acceleration from the **MPU-6000** and send it back. \
 **Host**: Create a simple script that asks the user which sensor they want to read, sends the corresponding letter, and prints the response.
+
+## Solutions
+
+The lab's exercises solutions are available in the [usb-examples](https://github.com/UPB-PMRust/usb-examples) repository.