Merge pull request 'Added bootload procedure to documentation.' (#1) from master into main

Reviewed-on: #1

README.md

@@ -1,3 +1,20 @@
 # Sliders_McGee
 
 Software for the Sliders McGee project
+
+## Header Pinout
+
+![Board header description](Slides_McGee_Pinout.png)
+
+## Bootloading Procedure
+
+Setup: 
+- Board unpowered and USB cable unplugged
+- Wire jumper between 3.3V header and pin 8 of input header (BL pin)
+
+Procedure:
+- Connect USB cable to board and computer
+- Board will present itself as a mass storage drive
+- Drag and drop new firmware image onto drive
+- Wait, no progress will be indicated
+- When bootloading is complete, board will launch application and drive will no longer be present on host computer