diff --git a/drivers/drv_usart.c b/drivers/drv_usart.c
index 58018b3..af2563a 100644
--- a/drivers/drv_usart.c
+++ b/drivers/drv_usart.c
@@ -2,8 +2,8 @@
  * @Description: 
  * @Date: 2022-01-10 17:36:06
  * @LastEditors: CK.Zh
- * @LastEditTime: 2022-01-10 19:53:36
- * @FilePath: /motion_ec_rtt/drivers/drv_usart.c
+ * @LastEditTime: 2022-01-10 22:04:13
+ * @FilePath: /motion_ec/drivers/drv_usart.c
  */
 /*
  *
@@ -23,8 +23,8 @@
 #ifdef BSP_USING_UART
 
 #if !defined(BSP_USING_UART0) && !defined(BSP_USING_UART1) && !defined(BSP_USING_UART2) && \
-    !defined(BSP_USING_UART3)
-    #error "Please define at least one BSP_USING_UARTx"
+    !defined(BSP_USING_UART3) && !defined(BSP_USING_LPUART0) && !defined(BSP_USING_LPUART1)
+    #error "Please define at least one BSP_USING_UARTx or BSP_USING_LPUARTx"
     /* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
 #endif
 
@@ -42,6 +42,12 @@ enum
 #ifdef BSP_USING_UART3
     UART3_INDEX,
 #endif
+#ifdef BSP_USING_LPUART0
+    LPUART0_INDEX,
+#endif
+#ifdef BSP_USING_LPUART1
+    LPUART1_INDEX,
+#endif
 };
 
 static struct hc_uart_cfg uart_cfg[] =
@@ -287,6 +293,33 @@ void Uart3_IRQHandler(void)
 }
 #endif /* BSP_USING_UART3 */
 
+#if defined(BSP_USING_LPUART0)
+void LpUart0_IRQHandler(void)
+{
+    /* enter interrupt */
+    rt_interrupt_enter();
+
+    rt_hw_uart_isr(&(uart_drv[LPUART0_INDEX].serial_device));
+
+    /* leave interrupt */
+    rt_interrupt_leave();
+}
+#endif /* BSP_USING_LPUART0 */
+
+#if defined(BSP_USING_LPUART1)
+void LpUart1_IRQHandler(void)
+{
+    /* enter interrupt */
+    rt_interrupt_enter();
+
+    rt_hw_uart_isr(&(uart_drv[LPUART1_INDEX].serial_device));
+
+    /* leave interrupt */
+    rt_interrupt_leave();
+}
+#endif /* BSP_USING_LPUART1 */
+
+
 int rt_hw_uart_init(void)
 {
     struct serial_configure cfg = RT_SERIAL_CONFIG_DEFAULT;