...

diff --git a/learn/stm32/USART.md b/learn/stm32/USART.md
index 12076be80fd8014d92cc806eecea9a9225cd2fab..52a8bd89514ef8fac3ed8b40be38dd6add9af7df 100644 (file)
--- a/learn/stm32/USART.md
+++ b/learn/stm32/USART.md
@@ -99,4 +99,14 @@ void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {
                return ReceiveUsartData(&usart2_data, huart);
        }
 }
+```
+
+```
+  // main.c
+  InitUsartTransfer();
+
+  while (1)
+  {
+         TransferUsartData();
+  }
 ```
\ No newline at end of file