Makefile info.

README.md

@@ -21,7 +21,29 @@ These instructions are for installing the needed dependencies on OS X, Linux doc
 
 It's important to me to make building things easy. I've made a Makefile which aims to make compiling and flashing AVRs as easy as possible. It tries to help you out too, for example it will find a `/dev/tty.usb*` device automatically.
 
-TODO: Finish this.
+```sh
+make            # Compiles the library.
+make install    # Compiles the library, and installs it on the system.
+make test       # Compiles the library, installs it, and compiles the tests.
+make clean      # Removes compiled artifacts.
+make uninstall  # Removes the library from the system.
+
+make size             # Displays size information.
+make <program>.flash  # Compiles and flashes the <program> to a connected AVR.
+make serial           # Opens a `screen` session to a connected AVR.
+```
+
+Below is an example of how to get started.
+
+```sh
+# Install the library.
+make install
+# Flash the uart test program. Remember that the baud rate is different for
+# various AVRs.
+env AVRDUDE_BAUD=57600 make test/uart_test.flash
+# Open a serial connection to the AVR.
+make serial
+```
 
 ## Libraries