diff --git a/src/usart.c b/src/usart.c
--- a/src/usart.c
+++ b/src/usart.c
@@ -7,6 +7,7 @@
 UART_HandleTypeDef huart1;
 DMA_HandleTypeDef hdma_usart1_rx;
 DMA_HandleTypeDef hdma_usart1_tx;
+uint8_t uart_initted = 0;
 
 void uart_init(void)
 {
@@ -73,6 +74,18 @@ void uart_init(void)
     //HAL_NVIC_EnableIRQ(USART1_IRQn);
     HAL_NVIC_DisableIRQ(USART1_IRQn);
 
+    uart_initted = 1;
+}
+
+void uart_deinit(void)
+{
+    if(uart_initted == 1)
+    {
+        HAL_DMA_DeInit(&hdma_usart1_rx);
+        HAL_DMA_DeInit(&hdma_usart1_tx);
+        HAL_UART_DeInit(&huart1);
+        uart_initted = 0;
+    }
 }
 
 UART_HandleTypeDef* uart_gethandle(void)