documentation updates (upload script)

Author: swallace23

README.md

@@ -1,2 +1,10 @@
 # Shield Code 6.0
 Documentation can be found [here](https://317lab.github.io/shield_code-6.0/index.html). Email s.k.wallace.09@gmail.com with questions.
+
+For 317 members: GSE-D is configured to program the board. To build the project, run 
+
+    pio run
+
+To upload (without building), run
+
+    python 317_upload.py 

src/main.cpp

@@ -15,9 +15,13 @@ Members of the 317 lab can access my notes on designing the board and known prob
 ## Programming the Board
 GSE-D is configured to program the board. Simply connect to the board with USB, cd into the project repository and run 
 
-   pio run
+   python 317_upload.py
 
-Make sure you fetch and pull changes from git before programming the board. This will build the project again before uploading, but it should be very fast.
+Make sure you fetch and pull changes from git before programming the board. If there are firmware changes, run
+
+    pio run
+
+to rebuild the project. We use the date on the binary file as the rev number, so don't rebuild unnecessarily.
 
 ## Notes and Quirks
 The board uses an external crystal oscillator, rather than the included ceramic oscillator on the Due. This required some changes that are not included in this documentation. First, a modded_system_sam3xa.c file is included in src/ to change the startup clock settings. Then, replace_libsam.py replaces the gcc_rel.a file that contains the precompiled startup code with our modded version. This required manually including the CMSIS libraries in /src/.