// DMA RX 설정    __HAL_RCC_DMA1_CLK_ENABLE();  // DMA1 클럭 활성화    hdma_rx.Instance = DMA_USART1;    hdma_rx.Init.Request = DMA_REQUEST_USART1_RX;    hdma_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;        hdma_rx.Init.PeriphInc = DMA_PINC_DISABLE;   ...