add blinky and more setup details

0_Introduction/setup.md

@@ -2,7 +2,7 @@
 
 ### Dev Envitonment
 
-Nobara 39 on a hand-me-down dual core dell laptop. An RPi Pico, programming over usb cable. Some wires, buttons, LEDs and resistors I <b>Borrowed</b> from lab.
+Nobara/Fedora 39 on a hand-me-down dual core dell laptop. An RPi Pico, programming over usb cable. Some wires, buttons, LEDs and resistors I <b>Borrowed</b> from lab.
 
 ### Code Editor
 Instead of using Arduino IDE, I use Visual Studio Code for programming. I use it because I (seem to) write code more efficiently and because I have it customized it to my liking.
@@ -15,7 +15,7 @@ Extensions I use:
 
 ### Project Generation
 
-A C Pico project requires additional files to handle compilation: CMakeList.txt and pico_sdk_import.cmake, templates of both available in the installed pico sdk. To automate this, I use [Pico Project Generator](https://github.com/raspberrypi/pico-project-generator). 
+A C Pico project requires additional files to handle compilation: CMakeList.txt and pico_sdk_import.cmake, templates of both available in the installed pico sdk. To automate this, I am using [Pico Project Generator](https://github.com/raspberrypi/pico-project-generator) to generate the boilerplate code for the project. Most of the options are left default. The only changes are: `Console over USB` and `Create VSCode Project` are enabled.
 
 <img src="../assets/picoProjGen.png" width="300">
 
@@ -40,7 +40,6 @@ So uploading the code requires following steps:
 This will mount the pico as a storage device, to where the generated `.UF2` file should be copied.
 
 
-
 ## Hardware Setup
 
 I have the RaspberryPi Pico Non-W variant: without the wireless chip. Soldered male jumper headers and mounted it onto a large breadboard. I am using solid copper wires for connections, because they stay in set shape.

1_Basic_GPIO/blinky.md

@@ -0,0 +1,50 @@
+## Blinky
+
+The classic, the helloWorld of embedded programming. This program turns the LED on and off periodically.
+
+### Initial steps: 
+- Create new project with project generator.
+- Open the project folder in VSCode.
+- Build the project by pressing the `build` button at the bottom and select the option with `arm-none-eabi`.
+- Make sure the build exits with code 0.
+
+<img src="../assets/buildButton.png" width="300">
+
+### Basic Code:
+
+``` C
+int main()
+{
+    stdio_init_all();
+
+    const uint OnBoardLED = PICO_DEFAULT_LED_PIN;
+    gpio_init(OnBoardLED);
+    gpio_set_dir(OnBoardLED, GPIO_OUT);
+    while (true){
+        gpio_put(OnBoardLED, true);
+        sleep_ms(500);
+        gpio_put(OnBoardLED, false);
+        sleep_ms(500);
+    }
+}
+```
+
+#### Explanation:
+`stdio_init_all()`: initialize stuff
+
+`OnBoardLED = PICO_DEFAULT_LED_PIN`: Get the GPIO number of onboard LED. Remember this is GPIO Number, NOT PIN NUMBER.
+
+`gpio_init(OnBoardLED)`: Initialize that GPIO pin.
+
+`gpio_set_dir(OnBoardLED, GPIO_OUT)`: Set GPIO direction (`GPIO_OUT` for writing and `GPIO_IN` for reading).
+
+`while (true){}`: Super loop of the program
+
+`gpio_put(OnBoardLED, true)`: Set `OnBoardLED` pin to `on` (`true` to turn on/set to high/voltage to VDD, `false` to turn off/set to low/voltage to GND)
+
+Pico login HIGH voltage is 3.3v and LOW voltage is 0v.
+
+`sleep_ms(500)`: sleep for 500ms.
+
+---
+