[HAL][UART] Add HAL_UART_RXEVENT_IDLE event notification to user in case of HAL_UARTEx_ReceiveToIdle_DMA() use with Circular DMA, even if occurring just after TC event

Src/stm32l1xx_hal_uart.c

diff --git a/Src/stm32l1xx_hal_uart.c b/Src/stm32l1xx_hal_uart.c
index 03c24e5..56e08bf 100644
--- a/Src/stm32l1xx_hal_uart.c
+++ b/Src/stm32l1xx_hal_uart.c
@@ -2520,6 +2520,28 @@
         HAL_UARTEx_RxEventCallback(huart, (huart->RxXferSize - huart->RxXferCount));
 #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
       }
+      else
+      {
+        /* If DMA is in Circular mode, Idle event is to be reported to user
+           even if occurring after a Transfer Complete event from DMA */
+        if (nb_remaining_rx_data == huart->RxXferSize)
+        {
+          if (huart->hdmarx->Init.Mode == DMA_CIRCULAR)
+          {
+            /* Initialize type of RxEvent that correspond to RxEvent callback execution;
+               In this case, Rx Event type is Idle Event */
+            huart->RxEventType = HAL_UART_RXEVENT_IDLE;
+
+#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
+            /*Call registered Rx Event callback*/
+            huart->RxEventCallback(huart, huart->RxXferSize);
+#else
+            /*Call legacy weak Rx Event callback*/
+            HAL_UARTEx_RxEventCallback(huart, huart->RxXferSize);
+#endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
+          }
+        }
+      }
       return;
     }
     else