Better parameter handling (#6)

* Add rx event handlers

* Fix compile errors and add constness

* Pass sender id

* Change api interface

* Revert changes

* Add filter fifo

* Add default setup

* Add receive function

* Remove interrupt activation

* Activate RX interrupts

* Merge remote changes

* Add event list constructor

* Fix compilation bug

* Send and receive multiple frames

* Refactor

* Refactor

* Fix compile error

* Use known syntax

* Refactor

* Provide storage

* Add frame end

* Add some documentation

* Turn macros into functions

* Refactor

* Refactor

* Fix compile error

* Use ExtendedIds

* Fix reception bug (fixes #4)

* Add packet headers

* Refactor

Co-authored-by: Riccardo998 <riccardo.storchi98@gmail.com>

Inc/mmr_can_util.h

@@ -15,6 +15,27 @@
 
 #define min(a, b) ((a) < (b) ? a : b);
 #define mask(value, bits) (value & bits)
+#define convertTo(resultType, lvalue) (*interpretAs(resultType*, &(lvalue)))
+#define interpretAs(resultType, lvalue) ((resultType)(lvalue))
+
+
+/**
+ * @brief
+ * Represents the result of an asynchronous computation
+ *
+ * Either
+ *  - Error: the computation resulted in error
+ *  - Pending: the computation is still undergoing
+ *  - Completed: the computation has completed succesfully
+ *               and its results can be read
+ *
+ * Asynchronous logig can be easily implemented using State Machines
+ */
+typedef enum {
+  MMR_ASYNC_RESULT_ERROR,
+  MMR_ASYNC_RESULT_PENDING,
+  MMR_ASYNC_RESULT_COMPLETED,
+} MmrAsyncResult;
 
 
 #endif /* INC_MMR_CAN_UTIL_H_ */