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.

firmware/Bsp/Drivers/LptimPwm.cpp

@@ -82,8 +82,8 @@ void LptimPwm::init_lptim()
     /*!< Produce a 60Hz, signal with minimal "high" time. The display
        only needs 2us of "high" time on EXTCOMM, and it draws a fair
        amount of power. */
-    LPTIM1->ARR = 0x4FF;
-    LPTIM1->CMP = 0x4FE;
+    LPTIM1->ARR = 0x27F;
+    LPTIM1->CMP = 0x27E;
     while(!(LPTIM1->ISR & LPTIM_ISR_ARROK)) {}
     while(!(LPTIM1->ISR & LPTIM_ISR_CMPOK)) {}