Fix RTC synchronization after sleep, add many more tests

There were two issues with the tests

1. Incorrect print formats causing incorrect output.

2. The RTC driver was not waiting for the shadow registers to be
updated after sleeping, their reset values to be read.

.dir-locals.el

@@ -1,3 +1,7 @@
-;;
-((nil . ((projectile-project-compilation-cmd . "make -C firmware/ BOARD=devboard")
-         (python-shell-interpreter . "python3"))))
+(;; Tell projectile about how to compile this project
+ (nil . ((projectile-project-compilation-cmd . "make -C firmware/ BOARD=devboard")
+         (projectile-project-test-cmd . "test/src/tr_test/test.py")
+         (python-shell-interpreter . "python3")
+         (gud-gdb-command-name . "arm-none-eabi-gdb -i=mi")))
+ ;; Automatically run python-black on python buffers when they are saved
+ (python-mode . ((eval . (python-black-on-save-mode)))))