Created State Machines (markdown)

State-Machines.md

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+# Downlink Core:
+![Manta Diagrams](https://user-images.githubusercontent.com/42497969/217994970-ff70a984-68bf-477a-b329-327f81ad9e7f.svg)
+
+## States:
+__IDLE__
+* Nothing is happening
+* FIFO isn't being written to or read from. It should be empty.
+* Move into `ARM` when the arm command is received.
+
+__ARM__
+* Pop things into the FIFO. If the FIFO's more than halfway full, pop them out as well. This ensures the buffer remains half full.
+* Move into `FILL` when trigger condition is met.
+
+__FILL__
+* Waiting for the FIFO to fill
+* Move to `DOWNLINK` once full.
+
+__DOWNLINK__
+* Pop things off the FIFO until it's empty.
+* Move to `IDLE` once FIFO is empty.
+
+
+
+# Uplink Core:
+Just two states, `IDLE` and `RUN`. Unless we want it to be reconfigurable, in which case we'll need states for being uninitialized or uploading. But this can be specified in the YAML.