Op Divider and bitutility updates

- Added unittests for `PeriodicOperationDivider` and the `bitutil` helpers
- Some API changes: Removed redundant bit part, because these functions are already in a namespace
- Some bugfixes for `PeriodicOperationDivider`

src/fsfw/globalfunctions/bitutility.h

@@ -5,13 +5,36 @@
 
 namespace bitutil {
 
-/* Helper functions for manipulating the individual bits of a byte.
-Position refers to n-th bit of a byte, going from 0 (most significant bit) to
-7 (least significant bit) */
-void bitSet(uint8_t* byte, uint8_t position);
-void bitToggle(uint8_t* byte, uint8_t position);
-void bitClear(uint8_t* byte, uint8_t position);
-bool bitGet(const uint8_t* byte, uint8_t position);
+// Helper functions for manipulating the individual bits of a byte.
+// Position refers to n-th bit of a byte, going from 0 (most significant bit) to
+// 7 (least significant bit)
+
+/**
+ * @brief   Set the bit in a given byte
+ * @param byte
+ * @param position
+ */
+void set(uint8_t* byte, uint8_t position);
+/**
+ * @brief   Toggle the bit in a given byte
+ * @param byte
+ * @param position
+ */
+void toggle(uint8_t* byte, uint8_t position);
+/**
+ * @brief   Clear the bit in a given byte
+ * @param byte
+ * @param position
+ */
+void clear(uint8_t* byte, uint8_t position);
+/**
+ * @brief   Get the bit in a given byte
+ * @param byte
+ * @param position
+ * @param If the input is valid, this will be set to true if the bit is set and false otherwise.
+ * @return False if position is invalid, True otherwise
+ */
+bool get(const uint8_t* byte, uint8_t position, bool& bit);
 
 }