chore: update docs to be referenced

Author: douglasichen

README.md

@@ -16,28 +16,11 @@ We have some zephyr rtos projects under zephyr_projects. To build/develop them y
 ### Arduino
 We have some arduino projects, under arduino_firmware.
 
-### common libraries
-Under common_libs/ we have our common libraries. These should be hardware agnostic, modular and testable.
+### Common Libraries
+Under common_libraries/ we have our common libraries. These should be hardware agnostic, modular and testable.
 We have an example here, that shows the general workflow for creating a common library module, including Catch2 testing.
 
-#### Low Pass FIR Filter
-This is an FIR filter that can be used on any unsigned 32-bit integers. You can specify the order (AKA. the number of previous data points the algorithm considers) when creating an instance of LowPassFIRFilter (default order of 1). The following example filters incoming data with an order of 1:
-```cpp
-#include <low_pass_fir_filter.hpp>
-
-LowPassFIRFilter filter;
-
-void process_incoming_data(unsigned int input) {
-    unsigned int filtered_input = filter.update(input);
-    send_filtered_data_to_arm(filtered_input);
-}
-```
-
-1. Constructor: defaults to order of 1
-2. Buffer: used to store previous data points
-3. Update function: 
-    - Fills the entire buffer with the first input to simplify the algorithm (otherwise cases for when the buffer is not full yet have to be handled differently).
-    - Uses sliding window to calculate the average of the correct set of data points.
+1. [Low pass FIR filter](common_libraries/low_pass_fir_filter/README.md)
 
 ### Testing
 We use Catch2 for testing cpp and c code. It's an easy to use, and easy to integrate tool for cpp unit tests.

common_libraries/low_pass_fir_filter/README.md

@@ -0,0 +1,18 @@
+# Low Pass FIR Filter
+This is an FIR filter that can be used on any unsigned 32-bit integers. You can specify the order (AKA. the number of previous data points the algorithm considers) when creating an instance of LowPassFIRFilter (default order of 1). The following example filters incoming data with an order of 1:
+```cpp
+#include <low_pass_fir_filter.hpp>
+
+LowPassFIRFilter filter;
+
+void process_incoming_data(unsigned int input) {
+    unsigned int filtered_input = filter.update(input);
+    send_filtered_data_to_arm(filtered_input);
+}
+```
+
+1. Constructor: defaults to order of 1
+2. Buffer: used to store previous data points
+3. Update function: 
+    - Fills the entire buffer with the first input to simplify the algorithm (otherwise cases for when the buffer is not full yet have to be handled differently).
+    - Uses sliding window to calculate the average of the correct set of data points.