Illumination: explain cc_test function

src/modules/illumination/illumination.cpp

@@ -179,6 +179,14 @@ float multi_read(uint8_t pin, uint16_t reads)
     return total/reads;
 }
 
+/*This is a test function used for debugging the CC driver.
+* A wire has to be soldered to one side of the feedback resistor R16
+* and connected to A0 on the header. This will then go through CC settings
+* and measure voltage on the feedback resistor (i.e. current).
+*
+* This is really only useful for anyone modifying the hardware
+* or CC driver communication.
+*/
 void cc_test()
 {
     analogReadResolution(12);