DMA当前存在问题：不规则波形的485发送会触发不可逆错误，暂时切换方案。

Core/Src/stm32g4xx_it.c

@@ -269,7 +269,7 @@ void FDCAN1_IT0_IRQHandler(void)
 void USART1_IRQHandler(void)
 {
   /* USER CODE BEGIN USART1_IRQn 0 */
-  UART_DMA_RX_IRQHandler(g_ptRS485_1);
+
   /* USER CODE END USART1_IRQn 0 */
   HAL_UART_IRQHandler(&huart1);
   /* USER CODE BEGIN USART1_IRQn 1 */
@@ -283,7 +283,7 @@ void USART1_IRQHandler(void)
 void USART3_IRQHandler(void)
 {
   /* USER CODE BEGIN USART3_IRQn 0 */
-  UART_DMA_RX_IRQHandler(g_ptRS485_2);
+
   /* USER CODE END USART3_IRQn 0 */
   HAL_UART_IRQHandler(&huart3);
   /* USER CODE BEGIN USART3_IRQn 1 */