CAN bus completion of abstract class

Can additions

include/sta/devices/stm32/can.hpp

@@ -80,6 +80,14 @@ namespace sta
         void disableFilter(uint8_t idx) override;
         void clearFilters() override;
 
+        // TODO
+        CanPendingRxFifos getPendingRxFifos() override;
+
+        // Const getters
+        uint8_t maxFilterCount() const override;
+        uint8_t maxFifoCount() const override;
+        uint8_t maxPayloadSize() const override;
+
     private:
         /**
          * @brief Initialize filter settings.

src/devices/stm32/can.cpp

@@ -168,6 +168,29 @@ namespace sta
             config->SlaveStartFilterBank = MAX_FILTER_COUNT;
         }
     }
+
+    CanPendingRxFifos STM32CanController::getPendingRxFifos(){
+    	CanPendingRxFifos pendingFifos(42, 3);
+
+        // Example implementation:
+        //pendingFifos.fifo0Pending = HAL_CAN_GetRxFifoFillLevel(handle_, CAN_RX_FIFO0) != 0;
+        //pendingFifos.fifo1Pending = HAL_CAN_GetRxFifoFillLevel(handle_, CAN_RX_FIFO1) != 0;
+
+        return pendingFifos;
+    }
+
+    uint8_t STM32CanController::maxFilterCount() const{
+        return MAX_FILTER_COUNT;
+    }
+
+    uint8_t STM32CanController::maxFifoCount() const {
+        return MAX_FIFO_COUNT;
+    }
+
+    uint8_t STM32CanController::maxPayloadSize() const {
+        return MAX_PAYLOAD_SIZE;
+    }
+
 } // namespace sta