Reformatting lib files and am starting to add DOxygen comments

exercises/00_usb_radio_check/src/main.cpp

@@ -18,11 +18,27 @@
 #define LORA_CR 5
 #endif
 
+/**
+ * This sketch is intended to be used as a quick test of the LoRa radio on the 
+ * T-Beam Supreme board, to verify that the radio is functional and can be used 
+ * in a USB-connected application.
+ * It will attempt to initialize the radio, and then repeatedly transmit a test 
+ * frame and call startReceive() to verify that the radio is responsive.
+ * Note that this sketch is not intended to be a full test of the radio's 
+ * functionality, but rather a quick check that the radio can be initialized 
+ * and used without errors. If you are seeing  -706 or -707 errors, it likely means 
+ * that the radio is not starting up correctly, which can be caused by incorrect 
+ * pin connections or power issues. If you are seeing other errors, it may indicate 
+ * a different issue with the radio or the code.
+ */
 
 // SX1262 on T-Beam Supreme (tbeam-s3-core pinout)
 SX1262 radio = new Module(LORA_CS, LORA_DIO1, LORA_RESET, LORA_BUSY);
 int state; // = radio.begin(915.0, 125.0, 7, 5, 0x12, 14);
 
+/*
+  @brief Setup function. Initializes the radio and prints the result to the serial console.
+*/
 void setup() {
   Serial.begin(115200);
   delay(2000);   // give USB time to enumerate
@@ -42,7 +58,10 @@ void setup() {
 
 
 }
-
+/*
+  @brief Loop function. Transmits a test frame and calls startReceive() to verify that 
+  the radio is responsive. Repeats every second.
+*/
 void loop() {
   static uint32_t counter = 0;
   Serial.printf("alive %lu\n", counter++);