Add pending RX api

include/sta/can/controller.hpp

@@ -19,6 +19,7 @@
 
 #include <sta/can/filter.hpp>
 #include <sta/can/headers.hpp>
+#include <sta/can/iter.hpp>
 
 
 namespace sta
@@ -60,6 +61,11 @@ namespace sta
 		 */
 		virtual uint32_t getRxFifoFlags() = 0;
 
+		/**
+		 * @brief Get list of RX FIFO indices with pending messages.
+		 */
+		virtual CanPendingRxFifos getPendingRxFifos() = 0;
+
 
 		// RX filter
 		//
@@ -88,6 +94,25 @@ namespace sta
 		 * @brief Disable and clear all filters.
 		 */
 		virtual void clearFilters() = 0;
+
+
+		// Info
+		//
+
+		/**
+		 * @brief Get number of available filters.
+		 */
+		virtual uint8_t maxFilterCount() const = 0;
+
+		/**
+		 * @brief Get number of available FIFOs.
+		 */
+		virtual uint8_t maxFifoCount() const = 0;
+
+		/**
+		 * @brief Get maximum supported payload size.
+		 */
+		virtual uint8_t maxPayloadSize() const = 0;
 	};
 } // namespace sta